AD974ARSZ

Overview

The AD974ARSZ is a four-channel, 16-bit data acquisition system (DAS) manufactured by Analog Devices Inc. It integrates four 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 or external reference option. It utilizes a serial interface for data output and includes a power-down mode to minimize consumption. The component is housed in a 28-lead SSOP package and supports input ranges including 0 V to +4 V, 0 V to +5 V, and 10 V.

Feature Summary

• Four independent 16-bit ADC channels with 200 kSPS sampling rate
• Single +5 V supply operation with low power dissipation (max 120 mW)
• Integrated serial interface compatible with standard microprocessors
• Internal 2.5 V reference or external reference capability

Applications

• Industrial process control systems requiring multi-channel signal acquisition
• Portable instrumentation and test equipment
• Data logging applications with moderate speed requirements
• Medical ultrasound equipment front-end signal conditioning

Procurement Notes

Verify the suffix 'Z' indicates RoHS compliance when sourcing. Confirm the package type is SSOP-28 as specified in the datasheet. Ensure the voltage supply matches the single +5 V requirement. Check for availability from authorized distributors such as Mouser or DigiKey. Validate that the operating temperature range meets the -40°C to +85°C specification.

Selection Notes

Select this component for applications requiring four synchronized 16-bit conversions at up to 200 kSPS. It is suitable where space constraints favor an integrated DAS over discrete ADCs. Consider the serial interface complexity if high-speed parallel data transfer is needed. Evaluate power consumption against battery-operated system limits. Compare with higher-speed alternatives like the AD9744 if throughput exceeds 200 kSPS.

Part Context

The AD974 series belongs to Analog Devices' family of data acquisition systems. The AD974ARSZ is the lead-free, RoHS-compliant version of the AD974ARS. It shares functionality with other ADI DAS products but offers specific integration of four channels in a compact package. This part is distinct from the AD9744, which is a high-speed DAC.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Cross-reference with ADI's current product portfolio for updated revisions. Verify pin compatibility if considering alternative manufacturers.