AD7891ASZ-1

ADCs/DACs - Special Purpose Overview

The AD7891ASZ-1 is an LC2MOS 8-channel, 12-bit high-speed data acquisition system manufactured by Analog Devices. It integrates an input multiplexer, track/hold amplifier, 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 with a maximum sample rate of 454 kSPS in parallel mode. The device features a selectable parallel or serial interface, overvoltage protection on each channel, and low power consumption of 100 mW max. It is housed in a 44-terminal MQFP package.

ADCs/DACs - Special Purpose Feature Summary

• 8 Single-Ended Analog Input Channels with Overvoltage Protection
• Fast 12-Bit SAR ADC with 1.6 μs Conversion Time
• Selectable Parallel or Serial Interface via MODE Pin
• 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 'Z' indicates Pb-free compliance as per the ordering guide. Confirm the '-1' designation corresponds to the ±5 V or ±10 V input range variant. Check for moisture sensitivity level (MSL) requirements during storage and handling due to the MQFP package type.

ADCs/DACs - Special Purpose Selection Notes

Select this model for applications requiring bipolar input ranges of ±5 V or ±10 V. Ensure the system operates within the commercial temperature range of –40°C to +85°C. Choose the parallel interface for throughput rates up to 454 kSPS; use serial interface if pin count reduction is prioritized, noting the lower maximum throughput.

ADCs/DACs - Special Purpose Part Context

This component belongs to the AD7891 family of 8-channel, 12-bit data acquisition systems. The ASZ-1 variant specifically denotes the commercial grade version with a plastic quad flatpack (MQFP) package and lead-free termination. It shares functional architecture with the AP-1 PLCC variant and the YS-1 automotive grade version.

ADCs/DACs - Special Purpose Replacement Considerations

Direct substitutes include AD7891AS-1 (standard packaging), AD7891AP-1 (PLCC package), and AD7891YS-1 (automotive temperature range). Verify package footprint compatibility when switching between MQFP and PLCC options.