AD974ARZ

Overview

The AD974ARZ is a 4-channel, 16-bit data acquisition system (DAS) manufactured by Analog Devices Inc. It integrates four 120 mW analog-to-digital converters with a throughput of 200 kSPS per channel. The device operates on a single +5 V supply and features an internal 2.5 V reference. It supports serial interface communication and offers input ranges including 0 V to +4 V, 0 V to +5 V, and 10 V. The component is housed in a 28-lead SOIC package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Four independent 16-bit ADC channels with 200 kSPS throughput
• Single +5 V power supply operation with max 120 mW power dissipation
• Internal 2.5 V reference with choice of external or internal configuration
• Serial interface for data output and control

Applications

• Industrial process control systems requiring multi-channel signal acquisition
• Data logging applications with moderate speed requirements
• Instrumentation systems utilizing single-supply operation

Procurement Notes

Verify the specific suffix 'ARZ' corresponds to the lead-free RoHS-compliant version in the 28-SOIC package. Confirm that the required input voltage range matches the device's supported levels (0V to +4V, 0V to +5V, or 10V). Ensure the design accommodates the serial interface timing specifications provided in the official datasheet.

Selection Notes

Select this component when a multi-channel solution is preferred over discrete ADCs to reduce board space. The integrated multiplexer and reference simplify circuit design compared to separate components. Consider the 200 kSPS limit; if higher sampling rates are needed, other members of the AD974 family or different series should be evaluated.

Part Context

The AD974ARZ belongs to the AD974 family of data acquisition systems from Analog Devices. It is the lead-free, RoHS-compliant variant of the AD974AR, distinguished by the 'Z' suffix. This family is designed for cost-effective, low-power data acquisition tasks where high channel count is necessary.

Replacement Considerations

The AD974ARS is the non-RoHS equivalent. For pin-compatible alternatives, verify specific parameter matches such as resolution and sampling rate against other 4-channel DAS devices.