AD7920AKS-500RL7

Overview

The AD7920AKS-500RL7 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 power supply ranging from 2.35 V to 5.25 V and supports throughput rates up to 250 kSPS. The device integrates a wide bandwidth track-and-hold amplifier capable of handling input frequencies exceeding 13 MHz. It features an internal reference derived from the supply voltage, eliminating the need for external components. The ADC 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 with wide input bandwidth
• Internal reference derived directly from the power supply
• Flexible serial interface supporting multiple communication protocols
• Low power consumption with dedicated power-down mode

Applications

• Battery-powered systems
• Medical instruments
• Data acquisition systems
• Mobile communications
• Instrumentation and control systems

Procurement Notes

Verify the specific grade (A or B) required for your application, as specifications such as integral nonlinearity and offset error vary between grades. Confirm that the ordering suffix matches the desired package type and reel quantity. Ensure compatibility with the system's supply voltage range and serial clock speeds before finalizing procurement.

Selection Notes

Select the AD7920 when 12-bit resolution and high speed are required within a minimal footprint. Compare against the AD7910 if 10-bit resolution suffices, as it offers similar performance characteristics. Consider the power-down current requirements for battery-operated designs, ensuring the selected grade meets the DC accuracy specifications for the intended operating temperature range.

Part Context

This component belongs to the AD7910/AD7920 family of micropower, high-speed ADCs. These devices are designed for applications requiring small size and low power consumption. The AD7920 specifically provides 12-bit resolution, distinguishing it from the 10-bit AD7910, while sharing identical packaging, interface capabilities, and general operational characteristics.

Replacement Considerations

The AD7910 serves as a lower-resolution alternative within the same package and interface ecosystem. Verify pin compatibility and software driver adjustments when substituting between the AD7910 and AD7920 models due to differences in data word length and specific accuracy grades.