AD7892AR-2

Overview

The AD7892AR-2 is a 12-bit successive approximation analog-to-digital converter (ADC) fabricated in Analog Devices' LC2MOS process. It operates from a single +5 V supply and features an on-chip track/hold amplifier, a +2.5 V internal reference, and versatile interface structures supporting both serial and parallel connections to microprocessors. The device accepts an analog input range of 0 V to +2.5 V with a throughput rate of 500 kSPS. It is housed in a 24-lead SOIC package and supports an operating temperature range of -40 °C to +85 °C.

Feature Summary

• Single-supply operation with low power consumption
• Integrated track/hold amplifier for accurate signal acquisition
• Flexible high-speed serial and parallel interface options
• Internal +2.5 V voltage reference capability

Applications

• Portable instrumentation systems requiring low power
• Industrial data acquisition applications
• Microprocessor-based control systems
• Digital signal processing front ends

Procurement Notes

Verify the specific suffix 'R' indicates the SOIC package variant when sourcing. Confirm that the '-2' designation corresponds to the 0 V to +2.5 V unipolar input range required by the application. Ensure the operating environment remains within the specified commercial temperature limits of -40 °C to +85 °C for this version.

Selection Notes

Select the AD7892AR-2 when a unipolar 0 V to +2.5 V input range is necessary alongside a 500 kSPS sampling rate. This model is appropriate for designs constrained to a single +5 V supply. Consider the integrated reference and track/hold features to minimize external component count compared to discrete solutions.

Part Context

This component belongs to the AD7892 family of high-speed, low-power 12-bit ADCs. The family includes variants with different input ranges (-10 V/+5 V, ±2.5 V) and throughput rates (600 kSPS). The AR-2 specifically targets unipolar applications within the standard industrial temperature grade.

Replacement Considerations

The AD7892BR-2 offers improved relative accuracy specifications while maintaining the same pinout and functionality. Other family members like the AD7892AN-2 provide DIP packaging alternatives.