AD7891BSZ-2

ADCs/DACs - Special Purpose Overview

The AD7891BSZ-2 is an LC2MOS-based, 8-channel, 12-bit high-speed data acquisition system manufactured by Analog Devices. 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 V to +5 V, 0 V to +2.5 V, and ±2.5 V. The device offers a maximum sample rate of 500 kSPS with a conversion time of 1.6 µs. It features selectable parallel or serial interfaces via the MODE pin, overvoltage protection on all channels, and operates within a commercial temperature range of -40°C to +85°C.

ADCs/DACs - Special Purpose Feature Summary

• 8 Single-Ended Analog Input Channels with Overvoltage Protection
• Selectable Parallel or Serial Interface Structure
• On-Chip Track/Hold Amplifier and 2.5 V Reference
• Single-Supply Operation (5 V) with Low Power Consumption

ADCs/DACs - Special Purpose Applications

• Data Acquisition Systems
• Motor Control
• Mobile Communication Base Stations
• Instrumentation

ADCs/DACs - Special Purpose Procurement Notes

Verify that the ordering suffix 'Z' confirms Pb-free compliance as per the manufacturer's guide. Confirm the specific version (B) accuracy requirements against application needs. Check for moisture sensitivity levels and recommended storage conditions prior to assembly. Ensure the package type matches the PCB footprint design.

ADCs/DACs - Special Purpose Selection Notes

Select the AD7891BSZ-2 for applications requiring 500 kSPS throughput with unipolar or bipolar input ranges. The B version provides improved relative accuracy compared to the A version. Choose the MQFP package for surface mount applications. Ensure the interface mode selection aligns with the host processor capabilities.

ADCs/DACs - Special Purpose Part Context

The AD7891BSZ-2 belongs to the AD7891 family of octal 12-bit SAR ADCs. It is functionally similar to the AD7891ASZ-2 but offers tighter accuracy specifications. The part is available in MQFP and PLCC packages. The 'Z' suffix indicates lead-free packaging compliant with RoHS standards.

ADCs/DACs - Special Purpose Replacement Considerations

The AD7891ASZ-2 is a compatible alternative with slightly different accuracy specifications. The AD7891APZ-2 offers the same functionality in a PLCC package. Verify pin compatibility and thermal characteristics when substituting.