AD7920BKSZ-500RL7

Overview

The AD7920BKSZ-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 2.35 V to 5.25 V supply and achieves 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 3.6 mW at 250 kSPS with a 3 V 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 package.

Feature Summary

• Integrated track-and-hold amplifier for wide bandwidth signal acquisition
• Flexible power management with configurable conversion rate via serial clock
• Internal reference derived directly from the power supply voltage
• Zero pipeline delay architecture for immediate data availability

Applications

• Battery-powered portable systems
• Medical instrumentation devices
• Mobile communications equipment
• Data acquisition systems
• High-speed modem applications

Procurement Notes

Verify the specific grade designation within the part number against the manufacturer's ordering guide to ensure compliance with required linearity specifications. Confirm that the SC-70-6 package variant matches the intended PCB footprint constraints. Cross-reference the suffix codes with official documentation to validate temperature range and performance grading before finalizing procurement orders.

Selection Notes

Select this component when a 12-bit resolution is required alongside low power dissipation in space-constrained designs. Ensure the system supports a single-ended input range of 0 to VDD. Verify that the host microprocessor can provide the necessary serial clock speeds up to 5 MHz to achieve the maximum 250 kSPS throughput rate effectively.

Part Context

This model belongs to the AD7910/AD7920 family of 10-bit and 12-bit ADCs. Both variants share identical pinouts, power requirements, and interface protocols. The primary distinction lies in the resolution and associated DC accuracy specifications, with the AD7920 offering higher precision suitable for demanding measurement applications.

Replacement Considerations

The AD7910 serves as the 10-bit counterpart within the same series. Designers requiring lower resolution may substitute this part with the AD7910 while maintaining identical physical and electrical interface compatibility.