AD7892ARZ-1

Overview

The AD7892ARZ-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 achieves a throughput rate of 500 kSPS with a conversion time of 1.6 µs. The device integrates an on-chip track/hold amplifier, a signal scaling circuit, and an internal +2.5 V reference. It supports both parallel and serial interfaces for microprocessor connection. The ARZ-1 variant utilizes a 24-lead SOIC package and accommodates an analog input range of ±5 V or ±10 V.

Feature Summary

• Integrates a high-speed track/hold amplifier and signal scaling circuitry to handle bipolar input ranges directly from a single supply.
• Features versatile interface logic allowing selection between fast parallel data transfer and three-wire serial communication modes.
• Includes an internal +2.5 V voltage reference that can be utilized directly or overridden by an external precision source.

Applications

• Portable instrumentation systems requiring low power consumption and single-supply operation.
• Industrial control loops utilizing bipolar sensor signals within ±5 V or ±10 V ranges.
• Data acquisition subsystems interfacing with microcontrollers via serial protocols.

Procurement Notes

Verify the specific suffix 'ARZ-1' against the manufacturer's current ordering guide to confirm package type and temperature grade. Ensure the design accounts for the 500 kSPS throughput specification rather than the higher rates available in other model variants. Confirm RoHS compliance status matches the project requirements before finalizing procurement.

Selection Notes

Select this component when a 12-bit resolution and 500 kSPS sampling rate are sufficient for the application. Choose this part over the -3 variant if the system requires support for wider ±5 V or ±10 V input ranges. 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 single-supply ADCs. It shares the core LC2MOS architecture and functional block diagram with other variants but differs in input range configuration and throughput speed. The 'A' designation indicates the commercial temperature range, while 'R' specifies the surface-mount SOIC package format.

Replacement Considerations

Direct substitutes include the AD7892BRZ-1 for improved accuracy specifications within the same package. For higher throughput requirements, the AD7892ARZ-3 offers 600 kSPS performance but with a restricted ±2.5 V input range. Verify pin compatibility and software interface adjustments when migrating between these variants.