AD7892AN-1

Overview

The AD7892AN-1 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, signal scaling circuitry, and an internal +2.5 V reference. The device supports both parallel and serial interfaces for microprocessor connection. For the AD7892-1 variant, the analog input range is selectable between ±10 V or ±5 V. It delivers a throughput rate of 500 kSPS with a conversion time of 1.6 µs and an acquisition time of 400 ns. The component is housed in a 24-lead plastic DIP package.

Feature Summary

• Integrated signal scaling allows direct interfacing with ±10 V or ±5 V analog signals while operating from 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 communication.
• Built-in overvoltage protection safeguards analog inputs against excessive voltage levels.

Applications

• Industrial process control systems requiring isolated or scaled analog input monitoring
• Portable instrumentation powered by single-supply battery sources
• Data acquisition modules interfacing with microcontrollers or DSPs

Procurement Notes

Verify the specific suffix 'AN-1' to confirm the 24-lead plastic DIP package and the ±10 V/±5 V input range configuration. Ensure the ordering documentation matches the required temperature grade and accuracy specifications defined in the manufacturer's guide before finalizing procurement.

Selection Notes

Select this model when a single-supply operation is required for bipolar input signals up to ±10 V. Consider the AD7892-3 if a higher throughput rate of 600 kSPS is needed, or the AD7892-2 for unipolar 0 V to +2.5 V applications. Verify that the system can accommodate the 1.6 µs conversion time and 400 ns acquisition period.

Part Context

The AD7892 series comprises high-speed, low-power 12-bit ADCs designed for versatile interface connectivity. The AD7892-1 variant specifically addresses applications needing wide dynamic range inputs within a single-supply environment. It utilizes Linear Compatible CMOS technology to combine precision bipolar performance with low power consumption.

Replacement Considerations

Direct functional equivalents include other parts within the AD7892 family such as the AD7892BN-1 for tighter accuracy or the AD7892AR-1 for surface mount packaging. Cross-family replacements require verification of pin compatibility and interface timing constraints.