AD7891BPZ-1

ADCs/DACs - Special Purpose Overview

The AD7891BPZ-1 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 in parallel mode. The device features a conversion time of 1.6 µs max, relative accuracy of ±0.75 LSB, and power dissipation of 100 mW max. It is housed in a PLCC-44 package and operates within a temperature range of –40°C to +85°C.

ADCs/DACs - Special Purpose Feature Summary

• 8-channel multiplexed input with overvoltage protection up to ±17 V
• Integrated 2.5 V reference and track/hold amplifier
• Parallel and serial interface options selectable via MODE pin
• Low power operation: 82 mW typical in normal mode, 75 mW in standby

ADCs/DACs - Special Purpose Applications

• Data acquisition systems
• Motor control applications
• Mobile communication base stations
• Instrumentation

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'P' indicates the PLCC-44 package and 'Z' denotes Pb-free compliance per the ordering guide. Confirm the '-1' variant matches the required ±5 V or ±10 V input range. Check for moisture sensitivity packaging requirements due to the Yes designation. Ensure ESD precautions are observed during handling.

ADCs/DACs - Special Purpose Selection Notes

Select the AD7891BPZ-1 for applications requiring ±0.75 LSB relative accuracy and bipolar input ranges. Choose this part over the Y version if the operating environment does not require the extended –55°C to +105°C automotive temperature range. Verify that the 454.5 kSPS throughput meets system timing constraints when using the parallel interface.

ADCs/DACs - Special Purpose Part Context

This component belongs to the AD7891 family of LC2MOS data acquisition systems. The B version offers improved linearity (±0.75 LSB) compared to the A and Y versions (±1 LSB). The P suffix designates the Plastic Leaded Chip Carrier (PLCC) package, distinct from the MQFP option. It serves as a monolithic solution combining analog front-end and digital conversion functions.

ADCs/DACs - Special Purpose Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.