AD7891BPZ-1REEL

ADCs/DACs - Special Purpose Overview

The AD7891BPZ-1REEL is an 8-channel, 12-bit high-speed data acquisition system manufactured by Analog Devices. It integrates a multiplexer, track/hold amplifier, SAR ADC, and 2.5 V reference on a single chip. Operating from a single 5 V supply, it supports ±5 V or ±10 V input ranges with a maximum sample rate of 454.5 kSPS. The device features parallel and serial interfaces, overvoltage protection up to ±17 V, and low power consumption of 82 mW typical in normal mode. It is housed in a PLCC-44 package.

ADCs/DACs - Special Purpose Feature Summary

• 8-channel multiplexed 12-bit SAR ADC with 454.5 kSPS throughput
• Integrated 2.5 V reference and track/hold amplifier
• Flexible parallel or serial interface via MODE pin
• ±17 V overvoltage protection on all analog inputs

ADCs/DACs - Special Purpose Applications

• Data acquisition systems
• Motor control applications
• Mobile communication base stations
• Industrial instrumentation

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'REEL' indicates tape-and-reel packaging for automated assembly. Confirm the 'B' version accuracy specifications (±0.75 LSB relative accuracy) against design requirements. Ensure the PLCC-44 package footprint matches the PCB layout. Check for moisture sensitivity level compliance during storage and handling.

ADCs/DACs - Special Purpose Selection Notes

Select this model for bipolar input signals requiring ±5 V or ±10 V ranges. Choose the parallel interface if higher throughput is needed compared to the serial limit of 357 kSPS. Consider the B version for tighter linearity specs compared to the A or Y versions. Verify thermal dissipation capabilities within the PLCC-44 package for the intended operating temperature range.

ADCs/DACs - Special Purpose Part Context

This component belongs to the AD7891 family of monolithic data acquisition systems. It is distinct from the AD7891-2 variant, which supports unipolar ranges (0 V to +5 V). The REEL suffix denotes reel packaging, differing from tube-packaged equivalents like the AD7891BP-1. It serves as a complete solution for multi-channel signal conditioning and digitization.

ADCs/DACs - Special Purpose Replacement Considerations

Direct pin-compatible substitutes within the same family include AD7891AP-1REEL (A version) and AD7891YP-1REEL (Y version), noting differences in accuracy and temperature range. Cross-family replacements require verification of interface compatibility and input voltage ranges.