AD7870KPZ-REEL

Overview

The AD7870KPZ-REEL is a monolithic 12-bit successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It integrates a track-and-hold amplifier, an internal laser-trimmed clock, and a buried Zener reference. The device operates from ±5 V power supplies and accepts a single-ended analog input range of ±3 V. Key electrical specifications include a maximum conversion time of 9 μs using the internal clock, a typical power dissipation of 60 mW, and a signal-to-noise ratio of 72 dB at a 10 kHz input frequency. The component supports parallel, byte, and serial digital interfaces with a data access time of 57 ns.

Feature Summary

• Integrates a complete 12-bit ADC with a 2 μs track-and-hold amplifier and on-chip reference.
• Features a self-contained internal clock that is laser-trimmed for accurate conversion timing.
• Offers versatile interface logic supporting parallel, byte, and serial data output formats.

Applications

• Data acquisition systems requiring fast microprocessor interfacing
• Digital signal processing applications needing dynamic performance specifications
• Low-power sampling ADC implementations

Procurement Notes

Verify the specific suffix against the manufacturer's current ordering guide to confirm package type and temperature grade. Ensure the reel packaging matches the required quantity for production runs. Cross-reference the datasheet revision to confirm pinout compatibility and electrical characteristics before integration into the design.

Selection Notes

Select this component for applications requiring a ±3 V input range and high-speed conversion. Compare the 72 dB SNR specification against system noise requirements. Verify that the ±5 V supply rails are available in the target design. Consider the PLCC package dimensions if board space is constrained.

Part Context

This part belongs to the AD7870/AD7875/AD7876 family of complete 12-bit sampling ADCs. While functionally similar to other members, it is distinguished by its ±3 V bipolar input range. The KPZ suffix indicates a plastic leaded chip carrier package with commercial temperature rating.

Replacement Considerations

The AD7870JPZ is a direct pin-compatible alternative in a PLCC package. The AD7870LPZ offers a different package option within the same series. Verify input voltage ranges when substituting with AD7875 or AD7876 variants.