AD7892AR-3

Overview

The AD7892AR-3 is a 12-bit successive approximation analog-to-digital converter fabricated in LC2MOS technology. It operates from a single +5 V supply with typical power dissipation of 60 mW. The device features an on-chip track/hold amplifier and internal +2.5 V reference, supporting throughput rates up to 600 kSPS with a conversion time of 1.47 µs. It accepts bipolar ±2.5 V analog input ranges and includes overvoltage protection allowing inputs up to ±7 V. The component provides flexible parallel and serial interface options for microprocessor connectivity.

Feature Summary

• Integrated signal scaling and track/hold amplifier for high-speed acquisition
• Dual interface modes selectable via MODE pin for parallel or serial data transfer
• On-chip precision voltage reference with external override capability
• Analog input overvoltage protection exceeding nominal operating range

Applications

• Portable instrumentation requiring low power consumption
• Industrial process control systems
• Data acquisition modules interfacing with microcontrollers
• Digital signal processing front-ends

Procurement Notes

Verify the specific suffix 'AR' indicates the SOIC-24 package variant when sourcing replacements. Confirm that the '-3' designation corresponds to the ±2.5 V input range specification. Ensure compatibility with existing board layouts regarding the 24-lead plastic surface mount footprint. Check for RoHS compliance status if required by local regulations.

Selection Notes

Select this model specifically for applications requiring a ±2.5 V input range rather than the ±10 V or unipolar variants available in the series. Consider the 600 kSPS throughput rate against system timing requirements. Evaluate the need for the integrated reference versus external precision references for tighter accuracy specifications. Assess interface complexity based on whether parallel or serial connections are preferred for the target processor.

Part Context

This component belongs to the AD7892 family of single-supply 12-bit ADCs. The family differentiates models primarily by input voltage range and throughput speed. The AR suffix denotes the plastic SOIC package option within the broader product line which also includes DIP and hermetic ceramic packages.

Replacement Considerations

AD7892BR-3 offers improved relative accuracy specifications while maintaining identical electrical characteristics and pinout.