AD7891BP-2REEL

ADCs/DACs - Special Purpose Overview

The AD7891BP-2REEL is an 8-channel, 12-bit data acquisition system manufactured by Analog Devices Inc. It integrates a multiplexer, track/hold amplifier, ADC, and 2.5 V reference on a single chip. Operating from a single 5 V supply, it supports input ranges of 0 to +2.5 V, 0 to +5 V, and ±2.5 V. The device features a conversion time of 1.6 µs max and achieves sample rates up to 500 kSPS in parallel mode. Relative accuracy is ±0.75 LSB max, with power dissipation typically at 82 mW. It is housed in a PLCC-44 package.

ADCs/DACs - Special Purpose Feature Summary

• 8 Single-Ended Analog Input Channels
• 12-Bit Resolution with ±0.75 LSB Max Accuracy (B Version)
• Single-Supply 5 V Operation with 82 mW Typical Power Dissipation
• On-Chip 2.5 V Reference and Track/Hold Amplifier

ADCs/DACs - Special Purpose Applications

• Data Acquisition Systems
• Motor Control
• Instrumentation

ADCs/DACs - Special Purpose Procurement Notes

Verify the B version designation for ±0.75 LSB relative accuracy and confirm the -2 suffix indicates unipolar/bipolar input ranges (0 to +2.5 V, 0 to +5 V, ±2.5 V). Ensure the REEL suffix matches automated assembly requirements for the PLCC-44 package. Check RoHS compliance status as specifications may vary by production batch.

ADCs/DACs - Special Purpose Selection Notes

Select this model for applications requiring high-speed sampling up to 500 kSPS per channel. The B version offers tighter linearity specifications compared to the A version. Ensure the system operates within the commercial temperature range of –40°C to +85°C. Verify interface compatibility, as the MODE pin selects between parallel and serial communication protocols.

ADCs/DACs - Special Purpose Part Context

This component belongs to the AD7891 family of LC2MOS data acquisition systems. The BP-2 variant specifically denotes the Plastic Leaded Chip Carrier (PLCC) package, the B grade accuracy, and the -2 input range configuration. It serves as a monolithic solution for multi-channel signal conditioning and digitization.

ADCs/DACs - Special Purpose Replacement Considerations

Direct substitutes include other AD7891 variants such as AD7891AP-2 or AD7891AS-2, provided the package type and accuracy grade meet design requirements. Cross-model comparisons should account for differences in operating temperature ranges and specific input voltage configurations.