AD9273BSVZ-40

Overview

The AD9273BSVZ-40 is an octal analog-to-digital converter (ADC) from Analog Devices, designed for low-cost, low-power, and compact applications. It integrates eight channels, each comprising a low noise preamplifier (LNA), variable gain amplifier (VGA), antialiasing filter (AAF), and a 12-bit ADC. The device supports sampling rates up to 50 MSPS, with the -40 grade optimized for 40 MSPS operation. Key electrical parameters include a typical Signal-to-Noise Ratio (SNR) of 64 dB at 40 MSPS and a Spurious-Free Dynamic Range (SFDR) of 75 dB. Power consumption is specified at 109 mW per channel in full-channel mode at 40 MSPS. The component utilizes SPI control and serial LVDS outputs.

Feature Summary

• Integrates eight independent signal chains, each containing an LNA, VGA, AAF, and 12-bit ADC.
• Includes an 8x8 differential crosspoint switch to support continuous wave (CW) Doppler modes.
• Features programmable second-order antialiasing filters with cutoff frequencies adjustable from 8 MHz to 18 MHz.
• Supports flexible power-down modes, allowing individual channel shutdown to extend battery life in portable systems.

Applications

• Medical imaging and ultrasound systems
• Automotive radar sensors

Procurement Notes

Verify the specific speed grade suffix (-40) against system timing requirements, as it dictates the maximum guaranteed sampling rate. Confirm package availability, as the component is offered in both 100-lead TQFP and 144-ball BGA formats. Ensure that the ordering documentation matches the exact part number to avoid discrepancies in performance specifications related to the speed bin.

Selection Notes

Select the AD9273BSVZ-40 when a high channel count is required within a small footprint. The integrated LNA and VGA reduce the need for external discrete components. Consider the -40 speed grade if the application requires a stable 40 MSPS sampling rate. Evaluate the CW Doppler capability if the design involves transducer switching, as the internal crosspoint switch simplifies this architecture.

Part Context

The AD9273 belongs to a family of octa-channel data converters that combine front-end signal conditioning with digitization. This integration addresses the complexity of multi-channel acquisition systems by consolidating amplification, filtering, and conversion onto a single die. The device serves as a complete receive chain solution, minimizing board space and reducing overall system bill of materials compared to discrete implementations.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.