AD7891APZ-1

ADCs/DACs - Special Purpose Overview

The AD7891APZ-1 is an 8-channel, 12-bit 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 and ±10 V input ranges with a maximum sample rate of 454.5 kSPS. The device features a parallel interface structure, CMOS/TTL outputs, and PLCC-44 packaging. Key electrical parameters include a conversion time of 1.6 µs, power dissipation of 82 mW typical, and operation within a temperature range of -40°C to +85°C.

ADCs/DACs - Special Purpose Feature Summary

• Integrated 8-channel multiplexer with overvoltage protection up to ±17 V
• On-chip 2.5 V reference and track/hold amplifier
• Parallel interface mode with standard control inputs
• Low power consumption: 82 mW typical in normal mode

ADCs/DACs - Special Purpose Applications

• Data Acquisition Systems
• Motor Control
• Instrumentation

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'P' indicates the PLCC-44 package and 'Z' denotes lead-free compliance. Confirm the '-1' variant matches the required ±5 V or ±10 V input range. Check for moisture sensitivity level (MSL) requirements during storage and handling due to the SMD/SMT installation style.

ADCs/DACs - Special Purpose Selection Notes

Select this model when a parallel interface is preferred over serial options. Ensure the application requires the ±5 V or ±10 V input range characteristic of the AD7891-1 variant. Verify that the PLCC-44 package fits the PCB layout constraints. Consider the 454.5 kSPS throughput limit if high-speed channel hopping is not required.

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 APZ-1 designation specifically identifies the commercial grade (-40°C to +85°C) version in the PLCC-44 package with lead-free termination.

ADCs/DACs - Special Purpose Replacement Considerations

Direct substitutes include other AD7891 variants with different packages or interfaces, such as AD7891ASZ-1 (MQFP-44) or AD7891BP-1 (higher accuracy). Cross-model replacements like the AD7890 series require verification of input range compatibility and interface differences.