AD7875KRZ

Overview

The AD7875KRZ is a complete monolithic 12-bit analog-to-digital converter featuring a 2 μs track-and-hold amplifier and an 8 μs successive approximation ADC. It operates from ±5 V power supplies with a unipolar 0 V to +5 V input range. The device includes an on-chip 3 V buried Zener reference and a laser-trimmed internal clock, eliminating the need for external timing components. It supports parallel, byte, and serial digital interfaces with a data access time of 57 ns. Typical power dissipation is 60 mW, and it achieves a signal-to-noise ratio of 70 dB at a 10 kHz input frequency.

Feature Summary

• Integrated 12-bit SAR architecture with built-in track-and-hold amplifier and laser-trimmed internal clock.
• Versatile digital interface supporting 12-bit parallel, two-byte, and serial data output formats.
• On-chip temperature-compensated 3 V buried Zener reference with external load capability.
• Fast microprocessor compatibility with 57 ns data access time and standard control inputs.

Applications

• Data acquisition systems requiring fast sampling rates
• Digital signal processing (DSP) front-ends
• Industrial process control instrumentation
• Medical equipment signal conditioning

Procurement Notes

Verify the specific suffix K against the manufacturer's current ordering guide to confirm package type and temperature grade. Ensure the component matches the required commercial operating range of 0°C to +70°C. Cross-reference the datasheet revision to confirm pinout and electrical specifications align with your design requirements before procurement.

Selection Notes

Select the AD7875KRZ when a unipolar 0 V to +5 V input range is required. Compare dynamic performance metrics such as SNR and THD against system noise floors. Verify that the 12/8/CLK pin configuration supports the desired data interface mode. Ensure supply voltages are strictly maintained within ±5% tolerance for specified performance.

Part Context

The AD7875KRZ belongs to the AD7870/AD7875/AD7876 family of 12-bit, 100 kHz sampling ADCs. While sharing identical core architecture and interface logic, this variant is distinguished by its specific unipolar input voltage range. It complements the bipolar AD7870 and AD7876 models within the same product line.

Replacement Considerations

Public confirmed substitute part numbers: AD7875KNZ, AD7875BQ.