AD7875KPZ-REEL

Overview

The AD7875KPZ-REEL is a complete monolithic 12-bit analog-to-digital converter (ADC) from Analog Devices. It integrates a track-and-hold amplifier, an 8 μs successive approximation ADC, and a laser-trimmed internal clock. The device operates on ±5 V power supplies and accepts a unipolar analog input range of 0 V to +5 V. It features a versatile digital interface supporting parallel, byte, and serial data formats with a typical data access time of 57 ns. Dynamic performance includes a signal-to-noise ratio of 70 dB at a 10 kHz input frequency. Power consumption is typically 60 mW.

Feature Summary

• Integrates a 3 V buried Zener reference and laser-trimmed internal clock for simplified system design.
• Supports multiple data output formats including 12-bit parallel, two 8-bit bytes, and serial transfer.
• Features a high-speed track-and-hold amplifier capable of acquiring signals to 12-bit accuracy in under 2 μs.

Applications

• Data acquisition systems requiring fast microprocessor interfacing.
• Digital signal processing applications needing specified dynamic performance parameters.
• Industrial control systems utilizing single-supply or dual-supply architectures.

Procurement Notes

Verify the specific suffix 'K' corresponds to the commercial temperature range of 0°C to +70°C as defined in the manufacturer's ordering guide. Confirm that the 'REEL' designation indicates tape-and-reel packaging rather than tube packaging. Ensure the component matches the PLCC package outline dimensions provided in the datasheet specifications.

Selection Notes

Select this model when a unipolar 0 V to +5 V input range is required, distinguishing it from the bipolar AD7870 and AD7876 variants. Consider the PLCC package availability if surface mount installation is preferred over DIP. Evaluate the 57 ns data access time against the target microprocessor bus speed requirements.

Part Context

This component belongs to the AD7870/AD7875/AD7876 family of 12-bit sampling ADCs. While sharing core architecture and interface logic, the AD7875 is distinct due to its unipolar input specification. Other family members include the AD7870 with ±3 V range and the AD7876 with ±10 V range.

Replacement Considerations

Direct functional replacements within the same family include the AD7870KNZ and AD7876KNZ, though these require different input voltage scaling circuits due to their bipolar ranges. Verify pin compatibility and thermal characteristics before substitution.