AD7923SRU-EP-RL7

Overview

The AD7923SRU-EP-RL7 is a 12-bit, high-speed, low-power successive approximation register (SAR) analog-to-digital converter featuring four single-ended inputs with an integrated channel sequencer. It operates from a single 2.7 V to 5.25 V supply and supports throughput rates up to 200 kSPS. The device includes a wide-bandwidth track-and-hold amplifier capable of handling input frequencies exceeding 8 MHz. It utilizes a flexible serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards. Designed for enhanced reliability, it meets AQEC standards for defense and aerospace applications, operating within a military temperature range of −55°C to +125°C in a 16-lead TSSOP package.

Feature Summary

• Four single-ended analog inputs managed by a programmable channel sequencer for sequential conversion.
• Military-grade construction supporting defense and aerospace applications under the AQEC standard.
• Flexible power management with auto-shutdown modes reducing current consumption to 0.5 μA maximum.
• VDRIVE function enabling direct connection to 3 V or 5 V processor systems independent of AVDD.

Applications

• Aerospace and defense systems
• Milcom equipment
• Avionics instrumentation
• Unmanned aerial systems

Procurement Notes

Verify the specific ordering suffix RL7 indicates reel packaging when sourcing components. Confirm that the EP designation ensures adherence to the Analog Devices Enhanced Product specification, which mandates controlled manufacturing baselines and unique fabrication sites. Request qualification data if required for specific project compliance. Ensure the component matches the RU-16 package outline dimensions for PCB footprint compatibility.

Selection Notes

Select this component when a 12-bit resolution is sufficient for applications requiring multi-channel acquisition without external multiplexers. The internal sequencer simplifies microprocessor interfacing by automating channel selection. Consider the 200 kSPS throughput limit and the requirement for an external 2.5 V reference voltage. Evaluate the power dissipation constraints at maximum sampling rates against available thermal management solutions in the 16-lead TSSOP package.

Part Context

This part belongs to the AD7923 family of SAR ADCs, specifically the Enhanced Product (EP) variant. The EP series is distinguished by its rigorous quality controls and suitability for harsh environments. Unlike standard commercial versions, the EP version guarantees a single assembly and fabrication site, providing traceability essential for long-life defense contracts. The RL7 suffix denotes tape and reel delivery format.

Replacement Considerations

Standard AD7923 variants lack the military temperature range and AQEC compliance. Direct functional substitutes must match the 12-bit resolution, 4-channel architecture, and 16-lead TSSOP package. Verify that alternative parts support the required 200 kSPS throughput and single-supply operation ranges.