AD7891BSZ-1

ADCs/DACs - Special Purpose Overview

The AD7891BSZ-1 is an 8-channel, 12-bit data acquisition system manufactured by Analog Devices Inc. It integrates an input multiplexer, track/hold amplifier, high-speed ADC, and a 2.5 V reference on a single chip. Operating from a single 5 V supply, it supports ±5 V or ±10 V input ranges. The device features a conversion time of 1.6 µs and achieves sample rates up to 454.5 kSPS in parallel mode. It offers selectable parallel or serial interfaces via the MODE pin, with typical power dissipation of 82 mW in normal mode and 75 µW in standby.

ADCs/DACs - Special Purpose Feature Summary

• 8 Single-Ended Analog Input Channels with overvoltage protection
• 12-Bit SAR ADC with 1.6 µs maximum conversion time
• Selectable Parallel or Serial Interface structure
• On-Chip 2.5 V Reference and Track/Hold Amplifier

ADCs/DACs - Special Purpose Applications

• Data Acquisition Systems
• Motor Control
• Mobile Communication Base Stations
• Instrumentation

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'BSZ-1' against the manufacturer's current ordering guide to confirm package type (MQFP) and lead-free status. Confirm availability as older revisions may be discontinued. Ensure ESD precautions are observed during handling due to sensitivity.

ADCs/DACs - Special Purpose Selection Notes

Select the AD7891BSZ-1 for applications requiring ±5 V or ±10 V bipolar input ranges. The 'B' version provides improved relative accuracy of ±0.75 LSB compared to the 'A' version. Choose this model if a 44-pin MQFP package is required for surface mount assembly.

ADCs/DACs - Special Purpose Part Context

The AD7891 series is a monolithic LC2MOS data acquisition system. The AD7891BSZ-1 belongs to the -1 variant family, designed for bipolar input ranges. It is part of a broader lineup including -2 variants for unipolar inputs and different temperature grades (A, B, Y).

ADCs/DACs - Special Purpose Replacement Considerations

Direct substitutes within the same family include AD7891ASZ-1 (±1 LSB accuracy) or AD7891YSZ-1 (extended temperature range). Cross-vendor replacements require matching 12-bit resolution, 8 channels, and interface compatibility.