AD7920BKSZ-REEL7

Overview

The AD7920BKSZ-REEL7 is a 12-bit, high-speed, low-power successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates from a single 2.35 V to 5.25 V power supply 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 minimized through a dedicated power-down mode drawing a maximum of 1 μA. The component is housed in a compact 6-lead SC70 surface-mount package.

Feature Summary

• Integrated 12-bit resolution with on-chip track-and-hold amplifier for wide bandwidth signal acquisition
• Flexible serial clock speed management allowing conversion rate adjustment via SCLK frequency
• Internal reference derived directly from the VDD supply rail to maximize dynamic input range
• Zero pipeline delay architecture enabling immediate data availability following conversion initiation

Applications

• Battery-powered portable systems requiring extended operational life
• Medical instrumentation and diagnostic devices
• Mobile communications equipment and high-speed modems
• Industrial data acquisition and control systems

Procurement Notes

Verify that the ordering suffix REEL7 corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the B grade designation meets specific linearity and offset error tolerances for the target application. Ensure compatibility with standard SC70 footprint dimensions during PCB layout verification.

Selection Notes

Select this component when a 12-bit resolution is necessary alongside high sampling speeds up to 250 kSPS. It is suitable for designs constrained by space due to the small SC70 package profile. Consider this part if the system requires a single-supply operation without external voltage references. Evaluate power requirements against the specified normal and power-down current consumption levels.

Part Context

This component belongs to the AD7910/AD7920 family of successive approximation ADCs. The AD7920 variant specifically provides 12-bit resolution compared to the 10-bit AD7910. Both share identical pinouts, interfaces, and performance characteristics regarding speed and power efficiency within the same physical packages.

Replacement Considerations

The AD7910 serves as a lower-resolution alternative within the same package and interface ecosystem. Other Analog Devices SAR ADCs may require significant schematic and software modifications due to differing pin configurations or communication protocols.