AD7920AKSZ-500RL7

Overview

The AD7920AKSZ-500RL7 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 the reference voltage derived directly from the VDD supply. It utilizes a flexible serial interface compatible with SPI, QSPI, Microwire, and DSP standards. The component is housed in a compact 6-lead SC70 surface-mount package.

Feature Summary

• Integrated track-and-hold amplifier with wide bandwidth for high-frequency signal acquisition
• Flexible power management with low standby current consumption
• Internal reference derived from the power supply for maximum dynamic range
• No pipeline delays associated with the conversion process

Applications

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

Procurement Notes

Verify the specific grade and package configuration against the manufacturer's ordering guide before procurement. Confirm that the supply voltage requirements align with the system design constraints. Ensure proper ESD precautions are taken during handling due to the sensitivity of the CMOS circuitry. Cross-reference the datasheet revision to ensure all timing specifications match the intended application requirements.

Selection Notes

Select this component when a 12-bit resolution is required within a minimal footprint. The internal reference simplifies the design by eliminating the need for external voltage references. Consider the trade-off between throughput rate and power dissipation, as lower clock speeds can reduce average power consumption. Verify compatibility with the host microcontroller's serial interface protocols.

Part Context

This part belongs to the AD7910/AD7920 family of low-power, high-speed ADCs. While the AD7910 offers 10-bit resolution, the AD7920 provides 12-bit accuracy. Both share identical pinouts and operational characteristics, differing primarily in resolution and linearity specifications. The AKSZ suffix indicates the specific temperature grade and SC70 packaging variant.

Replacement Considerations

The AD7910AKSZ-500RL7 serves as a functional substitute if 10-bit resolution is sufficient for the application. Other members of the AD79xx series may be considered if different resolution or package options are required, provided interface and power specifications remain compatible.