AD7892AR-1

Overview

The AD7892AR-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 internal +2.5 V reference. The device supports ±10 V or ±5 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 interfacing with ±10 V or ±5 V signals using a single +5 V supply.
• On-chip track/hold amplifier ensures accurate sampling at high speeds without external components.
• Flexible interface architecture supports both fast parallel data transfer and standard three-wire serial connections.
• Built-in overvoltage protection safeguards analog inputs against transient voltage spikes.

Applications

• Industrial process control systems requiring isolated signal acquisition
• Portable instrumentation powered by single-supply batteries
• Data acquisition modules for digital signal processing applications

Procurement Notes

Verify the specific suffix 'AR-1' to confirm the ±10 V/±5 V input range and 500 kSPS throughput specification. Ensure the ordering matches the required temperature grade and package type. Cross-reference the manufacturer's latest datasheet revision to confirm pinout compatibility and absolute maximum ratings before integration into new designs.

Selection Notes

Select this model when bipolar input signals within ±10 V are required alongside low power consumption. Compare against AD7892-3 if higher 600 kSPS throughput is needed with a smaller ±2.5 V input range. Consider the AD7892-2 for unipolar 0 V to +2.5 V applications. Verify that the system clocking can accommodate the 1.6 µs conversion time for the specified sample rate.

Part Context

This component belongs to the AD7892 family of single-supply ADCs. It shares the core LC2MOS architecture and interface logic with variants offering different input ranges and throughput rates. The 'AR' designation indicates the SOIC package, while '-1' specifies the bipolar input configuration. It serves as a bridge between high-speed conversion and low-power portable design constraints.

Replacement Considerations

AD7892BR-1: Offers improved relative accuracy (±1 LSB) compared to the AR version. AD7892AN-1: Plastic DIP package alternative with identical electrical specifications. AD7892BN-1: Improved accuracy in plastic DIP format. Ensure pinout compatibility remains consistent across these package and accuracy variations.