AD7920AKSZ-REEL7

Overview

The AD7920AKSZ-REEL7 is a 12-bit, high-speed 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. Power consumption is typically 12.5 mW at 250 kSPS with a 5 V supply. The ADC utilizes an internally derived reference from the power supply, eliminating the need for external components. It is housed in a compact 6-lead SC-70 package.

Feature Summary

• Integrated track-and-hold amplifier supporting wide bandwidth inputs
• Internal voltage reference derived directly from the power supply rail
• Flexible serial interface compatible with standard microprocessor protocols
• Dedicated power-down mode for significant current reduction between conversions

Applications

• Battery-powered portable systems
• Medical instrumentation devices
• Mobile communications equipment
• Data acquisition systems

Procurement Notes

Verify the specific grade and package configuration against the manufacturer's ordering guide before procurement. Confirm that the REEL7 suffix corresponds to the required tape and reel quantity for automated assembly processes. Ensure compatibility with the target system's logic voltage levels and clocking requirements.

Selection Notes

Select this component when a 12-bit resolution is required within a minimal footprint. The internal reference simplifies board layout by removing external precision reference requirements. Evaluate the trade-off between throughput rate and power consumption, as the device allows dynamic adjustment of the conversion speed via the serial clock frequency.

Part Context

This part belongs to the AD7910/AD7920 family of low-power, high-speed ADCs. While functionally identical to the AD7910 regarding interface and power management, it provides 12-bit resolution compared to the AD7910's 10-bit capability. Both share the same pinout and operational characteristics, differing primarily in accuracy and data output length.

Replacement Considerations

The AD7910AKSZ-REEL7 serves as a lower-resolution alternative within the same package. Verify that the reduced 10-bit resolution meets application accuracy requirements before substitution.