AD7892BR-1

Overview

The AD7892BR-1 is a high-speed, low-power 12-bit 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 and a +2.5 V internal reference. The device supports ±5 V or ±10 V analog input ranges with overvoltage protection up to ±17 V. It offers a throughput rate of 500 kSPS with a conversion time of 1.6 µs. The part provides flexible parallel and serial interface options for microprocessor connectivity and is housed in a 24-lead SOIC package.

Feature Summary

• Integrated signal scaling allows direct handling of ±5 V or ±10 V input signals while operating from a single +5 V supply.
• On-chip track/hold amplifier ensures accurate acquisition of full-scale amplitude sine waves to 12-bit resolution.
• Versatile interface logic supports both fast parallel connections and high-speed serial connections to digital processors.
• Built-in overvoltage protection on analog inputs prevents port damage during voltage excursions.

Applications

• Data acquisition systems requiring high-speed sampling
• Portable instrumentation powered by single supplies
• Industrial control applications interfacing with microprocessors

Procurement Notes

Verify the specific suffix 'BR-1' against the manufacturer's current ordering guide to confirm the package type and temperature range. Ensure that the required input voltage range matches the ±5 V or ±10 V specification associated with this model variant before finalizing procurement.

Selection Notes

Select the AD7892BR-1 when a 500 kSPS throughput rate is sufficient for the application. This model is appropriate for designs requiring ±5 V or ±10 V input ranges without external scaling circuitry. Consider the parallel interface mode if bus access times are critical for system performance.

Part Context

The AD7892 series utilizes Linear Compatible CMOS (LC2MOS) technology, combining precision bipolar circuits with low power CMOS logic. This family includes variants with different input ranges and throughput rates, such as the 600 kSPS AD7892-3. The BR-1 variant specifically denotes the SOIC package with commercial temperature specifications.

Replacement Considerations

The AD7892AR-1 serves as a pin-compatible alternative within the same series, offering identical electrical characteristics but packaged in a plastic DIP format instead of the SOIC used by the BR-1 variant.