ADDAC80-CBI-V

Product Overview of the ADDAC80 Series

The ADDAC80 Series represents a family of low-cost 12-bit digital-to-analog converters designed for applications where both reliability and cost efficiency are paramount considerations. Manufactured by Analog Devices Inc., the ADDAC80 Series integrates a high-stability voltage reference and output amplifier on a single monolithic chip, eliminating the need for external precision components in many applications.

The ADDAC80 Series is available in three performance grades—ADDAC80, ADDAC85, and ADDAC87—each optimized for different operating temperature ranges. The ADDAC80 operates from 0°C to 70°C, the ADDAC85 from -25°C to +85°C, and the ADDAC87 from -55°C to +125°C. This tiered approach allows system designers to select the appropriate grade based on their specific environmental requirements, avoiding unnecessary cost when extended temperature operation is not needed.

The ADDAC80 Series serves as an improved replacement for earlier DAC80 and DAC800 devices, offering significant performance enhancements through advanced circuit design and precision processing techniques. The integration of all necessary components on a single chip reduces system complexity, improves reliability, and maintains the cost advantages that made the original DAC80 family popular in industrial and commercial applications.

Architecture and Core Design Features of the ADDAC80 Series

The ADDAC80 Series employs a fully differential, nonsaturating precision current switching cell structure that provides the foundation for its performance characteristics. This architecture delivers substantially improved immunity to power supply voltage variations compared to conventional designs, a feature that becomes increasingly valuable in systems with less-than-ideal power distribution networks.

The current switching cell structure of the ADDAC80 Series incorporates an innovative design where nearly all critical components operate at constant power dissipation. This approach significantly reduces nonlinearities that would otherwise arise from thermal transients as individual bits are switched during conversion. By maintaining relatively constant power dissipation across different digital input codes, the ADDAC80 Series minimizes the temperature gradients that typically cause conversion errors in conventional DAC designs.

The resistor network within the ADDAC80 Series uses high-stability SiCr thin-film resistors that are laser-trimmed to fine resolution. This precision manufacturing process results in lower differential nonlinearity errors compared to conventional thin-film or thick-film resistor networks. The laser trimming process allows manufacturers to compensate for process variations during production, ensuring that each device meets its specified accuracy requirements without requiring individual calibration.

The

Performance Specifications and Accuracy Characteristics of the ADDAC80 Series

The ADDAC80 Series achieves a maximum nonlinearity of ±1/2 LSB (Least Significant Bit), with differential nonlinearity limited to ±3/4 LSB maximum. These specifications guarantee monotonic operation across the entire specified temperature range, meaning that the analog output will always increase (or remain constant) as the digital input code increases. This monotonicity guarantee is particularly valuable in closed-loop control systems where non-monotonic behavior could cause instability.

Accuracy in the ADDAC80 Series is defined as the deviation between the expected analog output for a given digital code and the actual measured output. This accuracy error can result from three independent sources: gain error, zero error, and linearity error. Of these three components, linearity error is the most significant because it cannot be corrected through simple calibration adjustments. The ADDAC80 Series specifies linearity error over its entire operating temperature range, ensuring predictable performance across environmental variations.

The differential linearity error specification of ±3/4 LSB maximum means that the voltage step size between adjacent output codes can range from 1/4 LSB to 1 3/4 LSB. This specification is important for applications requiring smooth analog output transitions, such as audio signal generation or precision instrumentation.

The ADDAC80 Series offers multiple output voltage range options. For voltage output models, available ranges include ±10V, ±5V, ±2.5V, 0V to +10V, and 0V to +5V. For current output models, ranges include ±1V and 0V to -2V when used with external resistive loads, or virtually unlimited ranges when driving an external operational amplifier.

Temperature Stability and Drift Analysis of the ADDAC80 Series

Temperature stability represents one of the most critical performance parameters for precision data conversion systems. The ADDAC80 Series addresses this requirement through multiple design innovations that work together to minimize temperature-dependent errors.

The ADDAC80 Series experiences three types of temperature-dependent drift: offset drift, gain drift, and linearity drift. Offset drift causes a vertical translation of the entire transfer characteristic, gain drift produces a change in the slope of the transfer curve, and linearity drift represents a change in the curve's shape. Understanding these three components is essential for predicting system performance across temperature variations.

Offset drift in the ADDAC80 Series originates from leakage currents and drift in the output amplifier. In unipolar configurations, offset drift causes a linear shift in the transfer curve. In bipolar configurations, the analysis becomes more complex due to the bipolar offset resistor (R_BP) connected to the summing node of the output amplifier. This resistor generates a current that exactly balances the current of the most significant bit, producing zero output when only the MSB is active.

A key advantage of the ADDAC80 Series design is that if the DAC and application resistors track perfectly with temperature, the bipolar offset drift approaches zero even if the reference voltage drifts. When the reference voltage changes, it causes a proportional shift in both the bipolar offset current and the DAC output current, maintaining their balance. This effect means that reference drift primarily causes a rotation of the transfer characteristic around the bipolar zero point rather than a vertical shift.

The ADDAC80 Series achieves gain drift specifications of 10 ppm/°C maximum through the use of laser-trimmed SiCr thin-film resistors for both the ladder network and the gain-setting resistors. These resistors are fabricated on the same chip using identical materials and processes, ensuring excellent thermal tracking. The gain-setting resistors and bipolar offset resistor track with the ladder network resistors, minimizing relative drift between these critical components.

The reference element and buffer amplifier drifts combine to produce the total reference temperature coefficient. The input reference current (I_REF) developed from the internal reference exhibits the same drift rate as the reference voltage. The DAC output current (I_DAC) is designed to track I_REF, and any mismatch between these currents over temperature contributes to the overall gain temperature coefficient.

Settling Time Performance of the ADDAC80 Series

Settling time defines the total time required for the ADDAC80 Series output to settle within a specified error band after a change in digital input code. This parameter is critical for applications requiring rapid conversion sequences or high-speed signal processing.

For voltage output models of the ADDAC80 Series, settling time is specified to 0.01% of full-scale range. Three settling time specifications are provided: two for maximum full-scale range changes (20V and 10V transitions) and one for a 1 LSB change measured at the major carry point (0111...1111 to 1000...0000). The major carry transition represents the worst-case settling time condition because it involves simultaneous switching of all bits except the most significant bit.

The settling time characteristic of the ADDAC80 Series depends significantly on the compensation capacitor selected. The optimal compensation capacitor value is 25 pF, as shown in the recommended settling time circuit. With this capacitor value and a 10 kΩ feedback resistor, the ADDAC80 Series settles within 4 microseconds for a full-scale range change. Using a 5 kΩ feedback resistor reduces settling time to 3 microseconds.

For current output models of the ADDAC80 Series, two settling times are specified to ±0.01% of full-scale range, each given for two different resistive load conditions: 10Ω to 100Ω and 1000Ω to 1875Ω. These specifications account for the different slew rate limitations imposed by various load impedances. Internal resistors are provided for connecting nominal load resistances of approximately 1000Ω to 1800Ω for output voltage ranges of ±1V and 0V to -2V.

Power Supply Requirements and Sensitivity of the ADDAC80 Series

The ADDAC80 Series operates with dual power supplies, requiring both positive and negative supply voltages. The standard operating range is ±12V, though the ADDAC80 Series can operate with supplies ranging from 0V to +18V for the positive supply and 0V to -18V for the negative supply. For ±10V full-scale output, a minimum of ±12.3V is required, while all other voltage ranges require a minimum of ±11.4V.

Power supply decoupling is essential for optimal ADDAC80 Series performance. The recommended approach uses 1 µF electrolytic capacitors located close to the device, paralleled with 0.01 µF ceramic capacitors for high-frequency performance. This combination provides both low-frequency energy storage and high-frequency noise filtering.

Power supply sensitivity in the ADDAC80 Series is specified as a percentage of full-scale range per percentage change in either the positive or negative supplies about the nominal power supply voltages. This specification quantifies how much the output voltage changes when the power supply voltages vary. The fully differential, nonsaturating current switching cell structure of the ADDAC80 Series provides substantially improved power supply rejection compared to conventional designs.

The ADDAC80 Series dissipates approximately 300 mW of power, a significant reduction compared to earlier DAC80 devices. This low power consumption improves reliability by reducing junction temperatures and extends battery life in portable applications. The reduced power dissipation also simplifies thermal management requirements in system designs.

Reference Voltage Generation in the ADDAC80 Series

All ADDAC80 Series models include an internal 6.3V reference voltage supply that is accurate to ±1%. This reference voltage must be connected to the Reference Input (Pin 16) for specified operation. The internal reference provides the bias current for the precision current switching cell structure and establishes the full-scale output current of the DAC.

The ADDAC80 Series reference can supply up to 2.5 mA of external current for use elsewhere in the application. An external buffer amplifier is recommended if the reference is to drive other system components. Without a buffer amplifier, variations in the load driven by the reference will result in gain variations in the ADDAC80 Series output. All gain adjustments should be made under constant load conditions to ensure stable calibration.

The buried Zener reference element in the ADDAC80 Series provides excellent long-term stability and temperature drift characteristics. The subsurface design reduces noise coupling and provides superior performance compared to surface-mounted reference elements. This design approach allows the ADDAC80 Series to maintain its accuracy specifications over extended periods without requiring recalibration.

Digital Input Code Compatibility of the ADDAC80 Series

The ADDAC80 Series accepts complementary digital input codes in binary (CBI) format. The CBI model can be connected by the user for any of three complementary codes: CSB (Complementary Straight Binary), COB (Complementary Offset Binary), or CTC (Complementary Two's Complement).

Complementary Straight Binary (CSB) code is used for unipolar output configurations. In this code, all zeros produce the minimum output voltage, and all ones produce the maximum output voltage. The digital input directly represents the fraction of full-scale output.

Complementary Offset Binary (COB) code is used for bipolar output configurations. In this code, all zeros produce the maximum negative output voltage, and all ones produce the maximum positive output voltage. The MSB acts as a sign bit, with the remaining bits representing the magnitude.

Complementary Two's Complement (CTC) code is also used for bipolar configurations and can be obtained by inverting the MSB of the COB code with an external inverter. This code format is commonly used in digital signal processing applications.

The flexibility of the ADDAC80 Series to accept multiple input code formats allows it to interface directly with various digital signal processors, microcontrollers, and other digital systems without requiring external code conversion logic.

Output Configuration Options for the ADDAC80 Series

The ADDAC80 Series is available in two fundamental output configurations: voltage output models and current output models. Each configuration offers distinct advantages for different application requirements.

Voltage output models of the ADDAC80 Series integrate an output amplifier on the chip, providing direct voltage outputs without requiring external operational amplifiers. This integration reduces component count, improves reliability, and simplifies circuit design. The internal output amplifier has been designed to settle within 1/2 LSB for a 10V full-scale transition in 2.0 microseconds when properly compensated.

Current output models of the ADDAC80 Series provide a current output that can be converted to voltage using external resistors or operational amplifiers. This configuration offers greater flexibility in output voltage range selection and is particularly useful for applications requiring output ranges larger than ±10V or for systems where the current output is directly useful.

The choice between voltage and current output models depends on the specific application requirements. Voltage output models are preferred for applications requiring standard voltage ranges with minimal external circuitry. Current output models are preferred for applications requiring custom output ranges or where the current output can be directly utilized.

Voltage Output Implementation with the ADDAC80 Series

The voltage output models of the ADDAC80 Series incorporate internal scaling resistors that can be connected to produce multiple output voltage ranges. Available ranges include ±10V, ±5V, ±2.5V, 0V to +10V, and 0V to +5V. The internal scaling resistors are fabricated using the same SiCr thin-film material as the DAC ladder network, ensuring excellent thermal tracking and minimizing gain and offset drift.

The output amplifier of the ADDAC80 Series uses a feedback resistor to establish the gain and output voltage range. For a 10 kΩ feedback resistor, the settling time for a full-scale range change is 4 microseconds. For a 5 kΩ feedback resistor, settling time is reduced to 3 microseconds. The compensation capacitor value of 25 pF is recommended for optimal settling time performance.

Gain and offset drift are minimized in the ADDAC80 Series voltage output models because of the thermal tracking of the scaling resistors with other device components. This on-chip integration eliminates the need for external precision resistors and the associated temperature coefficient mismatches that would otherwise degrade performance.

The output amplifier input offset voltage drift of the ADDAC80 Series contributes a small error to the overall system accuracy. This drift is typically on the order of a few microvolts per degree Celsius and is negligible compared to the drift contributions from the reference and resistor networks.

Current Output Implementation with the ADDAC80 Series

The current output models of the ADDAC80 Series provide a ±1 mA output current for bipolar configurations and -2 mA for unipolar configurations. These current outputs can be converted to voltage using external resistors or operational amplifiers, providing flexibility in output voltage range selection.

For resistive load applications, the ADDAC80 Series current output can be connected to external load resistors to produce specific output voltage ranges. The equivalent output circuit includes internal resistors (R_LI) with a temperature coefficient of 20 ppm/°C. External metal film trim resistors (R_LS) can be added in series to fine-tune the output voltage range.

For unipolar configurations with resistive loads, the output voltage is determined by the parallel combination of the internal and external load resistors with the DAC output current. The maximum load resistance is 1.54 kΩ, producing a maximum output voltage of -2.5V. With R_LS equal to zero, the output voltage is -1.69V.

For bipolar configurations with resistive loads, the output voltage is determined by the parallel combination of the load resistors with the DAC output current. The maximum load resistance is 11.18 kΩ, producing a maximum output voltage of ±2.5V. With R_LS equal to zero, the full-scale range is ±0.874V.

The ADDAC80 Series current output can also drive the summing junction of an external operational amplifier configured as a current-to-voltage converter. This configuration provides virtually unlimited output voltage range capability, limited only by the operational amplifier's voltage rating and the feedback resistor value. For output voltage ranges larger than ±10V, a high-voltage operational amplifier can be employed with an external feedback resistor. Protection diodes should be used when high-voltage operational amplifiers are employed.

External Adjustment and Calibration Procedures for the ADDAC80 Series

The ADDAC80 Series output can be calibrated using external offset and gain adjustment potentiometers. These potentiometers should have a temperature coefficient of 100 ppm/°C or less to maintain the ADDAC80 Series accuracy specifications. The 3.9 MΩ and 10 MΩ resistors used in the adjustment circuits should be 20% carbon or better and located close to the ADDAC80 to prevent noise pickup.

For offset adjustment in unipolar configurations, the digital input code that should produce zero potential output is applied, and the offset potentiometer is adjusted for zero output. For bipolar configurations, the digital input code that should produce the maximum negative output voltage is applied. For example, if the full-scale range is connected for 20V, the maximum negative output voltage is -10V.

For gain adjustment in either unipolar or bipolar configurations, the digital input code that should produce the maximum positive voltage output is applied, and the gain potentiometer is adjusted for this positive full-scale voltage. The gain adjust pin (Pin 23) is a high-impedance point, and a 0.01 µF ceramic capacitor should be connected from this pin to common to prevent noise pickup.

If it is not convenient to use the high-value resistors specified for the adjustment circuits, a functionally equivalent "T" network can be substituted in each case. This alternative approach provides the same adjustment range with lower component values, though care must be taken to maintain the same impedance levels.

Thermal Management and Long-Term Reliability of the ADDAC80 Series

The ADDAC80 Series achieves improved long-term stability through its innovative circuit design that reduces total power consumption to 300 mW. This low power dissipation not only improves reliability by reducing junction temperatures but also enhances long-term stability by minimizing thermal stress on the device components.

The monotonicity guarantee of the ADDAC80 Series over the specified temperature range is achieved through the combination of low initial linearity error (±1/2 LSB maximum) and low differential linearity error (±3/4 LSB maximum). These specifications ensure that linearity errors are insignificant in the computation of total temperature errors.

The ADDAC80 Series employs several design techniques to minimize temperature-dependent errors. The fully differential, emitter-weighted, precision current steering cell structure ensures that nearly all critical components operate at constant power dissipation across different digital input codes. This approach minimizes the temperature gradients that would otherwise cause conversion errors.

The laser-trimmed SiCr thin-film resistors used in the ADDAC80 Series provide excellent thermal tracking. The gain-setting resistors and bipolar offset resistor are fabricated on the same chip using identical materials and processes as the ladder network, ensuring that these components track together over temperature variations.

The buried Zener reference element in the ADDAC80 Series provides excellent long-term stability. The subsurface design reduces noise coupling and provides superior performance compared to surface-mounted reference elements. This design approach allows the ADDAC80 Series to maintain its accuracy specifications over extended periods without requiring recalibration.

Package Options and Environmental Specifications of the ADDAC80 Series

The ADDAC80 Series is available in multiple package options to accommodate different application requirements. The ADDAC80 is available in both plastic and ceramic DIP (Dual In-line Package) configurations. The ADDAC85 and ADDAC87 are available in hermetically sealed ceramic packages, providing superior environmental protection for applications requiring extended temperature operation or harsh environmental conditions.

The 24-lead ceramic DIP package provides a standard form factor compatible with conventional printed circuit board layouts and automated assembly equipment. The hermetically sealed ceramic packages used for the ADDAC85 and ADDAC87 provide superior moisture and contamination protection compared to plastic packages.

The ADDAC80 Series is specified for operation over three temperature ranges. The ADDAC80 operates from 0°C to 70°C, suitable for commercial and industrial applications. The ADDAC85 operates from -25°C to +85°C, suitable for extended temperature industrial applications. The ADDAC87 operates from -55°C to +125°C, suitable for military and aerospace applications.

The environmental classification of the ADDAC80 Series includes ECCN 1 (Unlimited) and EAR99 designation, indicating that the device is not subject to export restrictions. The HTSUS classification is 8542.39.0001.

Conclusion

The ADDAC80 Series represents a mature, proven technology for 12-bit digital-to-analog conversion in cost-sensitive applications. The integration of a precision reference, output amplifier, and high-stability resistor network on a single monolithic chip provides significant advantages in terms of reliability, performance, and system simplicity compared to discrete component implementations.

The ADDAC80 Series achieves its performance through innovative circuit design techniques including the fully differential, nonsaturating precision current switching cell structure, laser-trimmed SiCr thin-film resistors, and a buried Zener reference element. These design features work together to minimize temperature-dependent errors, reduce power consumption, and improve immunity to power supply variations.

The availability of three performance grades with different temperature ranges allows system designers to select the appropriate device for their specific application requirements. The flexibility of the ADDAC80 Series to accept multiple input code formats and produce various output voltage ranges makes it suitable for a wide range of applications from industrial process control to precision instrumentation.

The ADDAC80 Series continues to serve as an improved replacement for earlier DAC80 and DAC800 devices, offering significant performance enhancements while maintaining cost competitiveness. The proven reliability and long-term stability of the ADDAC80 Series make it a dependable choice for applications where both performance and cost are important considerations.

Frequently Asked Questions (FAQ)

Q1. What is the primary advantage of the ADDAC80 Series compared to earlier DAC80 devices?

A1. The ADDAC80 Series offers significant performance improvements through advanced circuit design and precision processing techniques. The fully differential, nonsaturating precision current switching cell structure provides greatly increased immunity to supply voltage variation. The innovative circuit design reduces total power consumption to 300 mW, which improves both reliability and long-term stability. Additionally, the laser-trimmed SiCr thin-film resistors result in lower differential nonlinearity errors compared to conventional designs.

Q2. How does the ADDAC80 Series maintain monotonicity over temperature?

A2. The ADDAC80 Series maintains monotonicity through the combination of low initial linearity error (±1/2 LSB maximum) and low differential linearity error (±3/4 LSB maximum). The low temperature coefficient binary ladder network guarantees that all units remain monotonic over the specified temperature range. The design ensures that the analog output will not vary by more than its maximum specification from an ideal straight line drawn between the end points over the entire operating temperature range.

Q3. What are the three performance grades of the ADDAC80 Series, and what are their temperature ranges?

A3. The ADDAC80 Series is available in three performance grades: the ADDAC80 specified for 0°C to 70°C operation, the ADDAC85 specified for -25°C to +85°C operation, and the ADDAC87 specified for -55°C to +125°C operation. This tiered approach allows system designers to select the appropriate grade based on their specific environmental requirements, avoiding unnecessary cost when extended temperature operation is not needed.

Q4. How much external current can the ADDAC80 Series reference supply?

A4. The precision buried Zener reference in the ADDAC80 Series can supply up to 2.5 mA of external current for use elsewhere in the application. An external buffer amplifier is recommended if the reference is to drive other system components. Without a buffer amplifier, variations in the load driven by the reference will result in gain variations in the ADDAC80 Series output.

Q5. What output voltage ranges are available with the ADDAC80 Series voltage output models?

A5. The ADDAC80 Series voltage output models can be configured to produce multiple output voltage ranges including ±10V, ±5V, ±2.5V, 0V to +10V, and 0V to +5V. The internal scaling resistors are fabricated using the same SiCr thin-film material as the DAC ladder network, ensuring excellent thermal tracking and minimizing gain and offset drift.

Q6. What is the recommended compensation capacitor value for optimal settling time in the ADDAC80 Series?

A6. The optimal compensation capacitor value for the ADDAC80 Series is 25 pF. With this capacitor value and a 10 kΩ feedback resistor, the ADDAC80 Series settles within 4 microseconds for a full-scale range change. Using a 5 kΩ feedback resistor reduces settling time to 3 microseconds.

Q7. How does the ADDAC80 Series minimize bipolar offset drift?

A7. The ADDAC80 Series minimizes bipolar offset drift through careful design of the bipolar offset resistor (R_BP) and the gain-setting resistor (R_GAIN). If the DAC and application resistors track perfectly with temperature, the bipolar offset drift approaches zero even if the reference voltage drifts. When the reference voltage changes, it causes a proportional shift in both the bipolar offset current and the DAC output current, maintaining their balance. This effect means that reference drift primarily causes a rotation of the transfer characteristic around the bipolar zero point rather than a vertical shift.

Q8. What power supply voltages are required for the ADDAC80 Series?

A8. The ADDAC80 Series operates with dual power supplies, requiring both positive and negative supply voltages. The standard operating range is ±12V, though the ADDAC80 Series can operate with supplies ranging from 0V to +18V for the positive supply and 0V to -18V for the negative supply. For ±10V full-scale output, a minimum of ±12.3V is required, while all other voltage ranges require a minimum of ±11.4V.

Q9. What digital input code formats does the ADDAC80 Series accept?

A9. The ADDAC80 Series accepts complementary digital input codes in binary (CBI) format. The CBI model can be connected by the user for any of three complementary codes: CSB (Complementary Straight Binary) for unipolar configurations, COB (Complementary Offset Binary) for bipolar configurations, or CTC (Complementary Two's Complement) for bipolar configurations. This flexibility allows the ADDAC80 Series to interface directly with various digital signal processors and microcontrollers.

Q10. How should power supply decoupling be implemented for the ADDAC80 Series?

A10. Power supply decoupling is essential for optimal ADDAC80 Series performance. The recommended approach uses 1 µF electrolytic capacitors located close to the device, paralleled with 0.01 µF ceramic capacitors for high-frequency performance. This combination provides both low-frequency energy storage and high-frequency noise filtering. The capacitors should be located as close as possible to the ADDAC80 to minimize lead inductance.

Q11. What is the maximum nonlinearity specification of the ADDAC80 Series?

A11. The ADDAC80 Series achieves a maximum nonlinearity of ±1/2 LSB (Least Significant Bit). The differential nonlinearity is limited to ±3/4 LSB maximum. These specifications guarantee monotonic operation across the entire specified temperature range, meaning that the analog output will always increase (or remain constant) as the digital input code increases.

Q12. How can the ADDAC80 Series be used to produce output voltage ranges larger than ±10V?

A12. For output voltage ranges larger than ±10V, the ADDAC80 Series current output can drive a high-voltage operational amplifier with an external feedback resistor. The feedback resistor value determines the output voltage range according to the relationship V_OUT = I_OUT × R_F, where I_OUT is the ADDAC80 Series output current and R_F is the feedback resistor. Protection diodes should be used when high-voltage operational amplifiers are employed. The feedback resistor should have a temperature coefficient as low as possible to minimize drift.

Q13. What is the power dissipation of the ADDAC80 Series?

A13. The ADDAC80 Series dissipates approximately 300 mW of power, a significant reduction compared to earlier DAC80 devices. This low power consumption improves reliability by reducing junction temperatures and extends battery life in portable applications. The reduced power dissipation also simplifies thermal management requirements in system designs.

Q14. How should external offset and gain adjustment potentiometers be selected for the ADDAC80 Series?

A14. External offset and gain adjustment potentiometers for the ADDAC80 Series should have a temperature coefficient of 100 ppm/°C or less to maintain the ADDAC80 Series accuracy specifications. The 3.9 MΩ and 10 MΩ resistors used in the adjustment circuits should be 20% carbon or better and located close to the ADDAC80 to prevent noise pickup. If it is not convenient to use these high-value resistors, a functionally equivalent "T" network can be substituted.

Q15. What package options are available for the ADDAC80 Series?

A15. The ADDAC80 Series is available in multiple package options. The ADDAC80 is available in both plastic and ceramic DIP (Dual In-line Package) configurations. The ADDAC85 and ADDAC87 are available in hermetically sealed ceramic packages, providing superior environmental protection for applications requiring extended temperature operation or harsh environmental conditions. The 24-lead ceramic DIP package provides a standard form factor compatible with conventional printed circuit board layouts and automated assembly equipment.