AD7920AKS-REEL

Overview

The AD7920AKS-REEL is a 12-bit successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates from a single power supply 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, with a signal-to-noise ratio of 70 dB minimum at 100 kHz input frequency. Power consumption is typically 12.5 mW at 5 V and 3.6 mW at 3 V during operation. The component utilizes a flexible serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards, housed in a compact 6-lead SC70 package.

Feature Summary

• Integrated track-and-hold amplifier supporting wide bandwidth inputs
• Internal reference derived directly from the power supply voltage
• Flexible power management with low standby current consumption
• Standard successive approximation architecture without pipeline delays

Applications

• Battery-powered systems
• Medical instruments
• Data acquisition systems
• Mobile communications equipment

Procurement Notes

Verify that the ordering suffix matches the required package type and reel configuration. Confirm the specific grade designation corresponds to the necessary linearity specifications for your application. Ensure compatibility with the host microcontroller's serial clock speed limits before finalizing the purchase order.

Selection Notes

Select this component when a 12-bit resolution is required alongside high-speed sampling capabilities within a constrained physical footprint. Consider the internal reference feature if external voltage references are undesirable to minimize board space. Evaluate the power-down mode requirements against the system's duty cycle to optimize overall energy efficiency.

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 using identical pinouts and interfaces. Both variants share the same low-power design philosophy and packaging options, allowing for scalable design transitions between resolution requirements.

Replacement Considerations

The AD7910 serves as a lower-resolution alternative within the same family. Verify pinout compatibility and software register adjustments if substituting with other SAR ADCs from different manufacturers.