AD7892SQ-1

Overview

The AD7892SQ-1 is a high-speed, low-power 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 and internal +2.5 V reference. This specific variant supports an analog input range of ±5 V or ±10 V with a throughput rate of 500 kSPS. It offers flexible serial and parallel interface options for microprocessor connection and includes overvoltage protection on the analog inputs.

Feature Summary

• Integrated signal scaling allows direct handling of ±5 V or ±10 V analog input signals while operating from a single +5 V supply.
• Includes overvoltage protection on analog inputs to prevent damage during voltage excursions.
• Features a versatile interface structure supporting both high-speed parallel and serial data output modes.

Applications

• Industrial data acquisition systems requiring robust input ranges
• Portable instrumentation powered by single supplies
• Microcontroller-based measurement interfaces

Procurement Notes

Verify the S suffix indicates the extended temperature range of -55°C to +125°C. Confirm the SQ package designation corresponds to the Cerdip option listed in the ordering guide. Ensure the -1 suffix matches the required ±5 V or ±10 V input range specification.

Selection Notes

Select this part when bipolar input signals up to ±10 V are required without external scaling circuitry. The S version is necessary for applications operating between -55°C and +125°C. Verify that the 500 kSPS throughput meets system timing requirements compared to the faster AD7892-3 variants.

Part Context

The AD7892 series comprises three input range variants: AD7892-1 (±5 V/±10 V), AD7892-2 (0 V to +2.5 V), and AD7892-3 (±2.5 V). The AD7892SQ-1 belongs to the AD7892-1 family, providing the widest input voltage capability among the standard versions.

Replacement Considerations

AD7892BRZ-1 provides similar functionality in a SOIC package with commercial temperature ratings. AD7892AN-1 is the plastic DIP equivalent with commercial temperature ratings.