AD7891APZ-1REEL

ADCs/DACs - Special Purpose Overview

The AD7891APZ-1REEL 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 or ±10 V input ranges with a maximum sample rate of 454.5 kSPS. The device features parallel and serial interfaces selectable via the MODE pin. Key electrical parameters include a conversion time of 1.6 µs max, typical power dissipation of 82 mW in normal mode, and 75 mW in standby. It is housed in a 44-lead PLCC package.

ADCs/DACs - Special Purpose Feature Summary

• 8-channel multiplexed input with overvoltage protection up to ±17 V
• Integrated 12-bit SAR ADC with 1.6 µs max conversion time
• Selectable parallel or serial interface via MODE pin
• On-chip 2.5 V reference with external reference capability

ADCs/DACs - Special Purpose Applications

• Data Acquisition Systems
• Motor Control
• Instrumentation

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'REEL' indicates tape-and-reel packaging for the AD7891APZ-1 variant. Confirm that the 'A' version meets the required accuracy specifications (±1 LSB relative accuracy) and temperature range (-40°C to +85°C). Ensure compatibility with the ±5 V or ±10 V input range configuration as defined for the -1 model.

ADCs/DACs - Special Purpose Selection Notes

Select the AD7891APZ-1REEL when an 8-channel, 12-bit solution with integrated reference and track/hold is required. Choose this part over the -2 model if bipolar input ranges (±5 V or ±10 V) are needed rather than unipolar ranges. Consider the PLCC package form factor for surface mount assembly requirements.

ADCs/DACs - Special Purpose Part Context

The AD7891APZ-1REEL belongs to the AD7891 family of high-speed data acquisition systems. The 'P' suffix denotes the Plastic Leaded Chip Carrier (PLCC) package, while 'Z' indicates lead-free compliance. The 'REEL' suffix specifies the reel packaging format. This component is part of Analog Devices' specialized data acquisition portfolio designed for industrial applications.

ADCs/DACs - Special Purpose Replacement Considerations

Direct substitutes within the same package and specification include other AD7891 variants such as AD7891BPZ-1REEL (higher accuracy) or AD7891YSZ-1REEL (extended temperature range), provided the input range and accuracy requirements are met.