AD7920BRMZ-REEL

Overview

The AD7920BRMZ-REEL is a 12-bit, high-speed, low-power successive approximation analog-to-digital converter manufactured by Analog Devices Inc. It operates from a single supply voltage ranging from 2.35 V to 5.25 V and supports throughput rates up to 250 kSPS. The device features an internal track-and-hold amplifier capable of handling input frequencies exceeding 13 MHz. It utilizes a flexible serial interface compatible with SPI, QSPI, Microwire, and DSP standards. Power consumption is typically 3.6 mW at 250 kSPS with a 3 V supply and 12.5 mW with a 5 V supply. The component is housed in an 8-lead MSOP package.

Feature Summary

• Integrated track-and-hold amplifier for wide bandwidth signal acquisition
• Flexible power management with configurable conversion rate via serial clock
• Internal reference derived directly from the power supply rail
• Zero pipeline delay architecture for immediate data availability

Applications

• Battery-powered portable systems
• Medical instrumentation devices
• Mobile communications equipment
• Data acquisition systems
• High-speed modem applications

Procurement Notes

Verify the specific grade (A or B) required for your application against the datasheet specifications. Confirm that the ordering suffix matches the desired packaging format. Ensure compatibility with the host microcontroller's serial interface timing requirements before finalizing procurement.

Selection Notes

Select this component when a 12-bit resolution is necessary alongside high throughput speeds. Consider the internal reference feature if external voltage references are undesirable to save board space. Evaluate the power-down mode capabilities if extending battery life in intermittent sampling applications is a priority.

Part Context

This part belongs to the AD7910/AD7920 family of micropower ADCs. While the AD7910 offers 10-bit resolution, the AD7920 provides 12-bit precision within the same physical footprint and power envelope. Both share identical pinouts and operational characteristics, differing primarily in bit depth and associated linearity specifications.

Replacement Considerations

The AD7910 serves as a lower-resolution alternative within the same series. Verify pinout compatibility and software register adjustments if substituting between the 10-bit and 12-bit variants.