ADADC85SZ-12/883B

Analog To Digital Converters (ADC) Overview

The ADADC85SZ-12/883B is a complete 12-bit successive approximation analog-to-digital converter manufactured by Analog Devices Inc. It integrates an internal clock, buried Zener reference, and comparator within a hybrid IC design utilizing MSI digital and linear monolithic chips alongside a 12-bit monolithic DAC. The device operates with ±12 V analog supplies and +5 V digital supply, delivering a maximum conversion time of 10 µs. It features a linearity error of ±0.012% FSR and supports bipolar input ranges of ±2.5 V, ±5 V, and ±10 V, as well as unipolar ranges of 0 to +5 V and 0 to +10 V. Processed to MIL-STD-883B requirements, it ensures monotonic operation over the –55°C to +125°C temperature range.

Analog To Digital Converters (ADC) Feature Summary

• Complete 12-bit A/D converter architecture integrating internal clock, buried Zener reference, and comparator for modular performance without external components.
• High reliability hybrid IC construction combining MSI digital and linear monolithic chips with a 12-bit monolithic feedback DAC.
• MIL-STD-883B processing available, ensuring guaranteed performance and monotonicity across the –55°C to +125°C temperature range.
• Versatile negative true parallel logic outputs compatible with DTL and TTL standards, supporting short cycle capability.

Analog To Digital Converters (ADC) Applications

• Severe and aerospace applications requiring high reliability and wide temperature operation.
• High system throughput data acquisition systems needing fast successive approximation conversion.
• Precision measurement equipment utilizing the integrated precision +6.3 V reference for external applications.

Analog To Digital Converters (ADC) Procurement Notes

Verify that the ordering suffix correctly identifies the specific model variant, including voltage options and linearity grades. Confirm that the component has been processed to MIL-STD-883 Class B requirements if environmental screening is mandated for the application. Ensure compatibility with existing system power supplies and interface logic levels before procurement.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a complete, high-speed 12-bit ADC with integrated reference and clock is required for harsh environments. The ADADC85SZ-12/883B is suitable for designs needing ±12 V analog operation and extended temperature ranges up to +125°C. Consider the industry-standard pinout and negative true parallel outputs for direct replacement or microprocessor interfacing in legacy or specialized systems.

Analog To Digital Converters (ADC) Part Context

The ADADC85SZ-12/883B belongs to the AD ADC84/AD ADC85 series of fast, complete 12-bit A/D converters. This series is characterized by its hybrid IC design and low chip count, which enhances reliability. The 'S' designation indicates the extended temperature range version, while 'Z' denotes ±12 V operation capability. The '/883B' suffix confirms compliance with military standard processing.

Analog To Digital Converters (ADC) Replacement Considerations

Public confirmed substitute part numbers: ADADC85S12/883B (±15 V operation).

Analog To Digital Converters (ADC) FAQ

What is the maximum linearity error specified for the ADADC85SZ-12/883B?

The maximum linearity error is specified as ±0.012% of Full Scale Range (FSR).

How does the short cycle feature affect conversion time?

The short cycle input allows the timing cycle to terminate after any desired number of bits, permitting shorter conversion times for applications not requiring full 12-bit resolution.

Is the device guaranteed to be monotonic over its operating temperature range?

Yes, monotonic operation of the feedback DAC is guaranteed over the –55°C to +125°C temperature range.