AD9273BSVZRL-25

Overview

The AD9273BSVZRL-25 is an octal analog-to-digital converter (ADC) from Analog Devices, featuring integrated low noise preamplifiers (LNA), variable gain amplifiers (VGA), and antialiasing filters (AAF). It provides eight channels with a 12-bit resolution operating at a maximum sampling rate of 25 MSPS. The device utilizes a pipeline architecture and supports single-ended inputs with a full-scale output of 4.4 V p-p differential. Key electrical specifications include a signal-to-noise ratio (SNR) of 65.5 dB and a total power dissipation of 940 mW in full-channel mode. It is housed in a 100-lead TQFP package.

Feature Summary

• Integrates eight independent channels, each containing an LNA, VGA, AAF, and 12-bit ADC.
• Features an 8x8 differential crosspoint switch to support continuous wave (CW) Doppler applications.
• Offers SPI-programmable LNA gains (15.6 dB/17.9 dB/21.3 dB) and PGA gains (21 dB/24 dB/27 dB/30 dB).
• Includes programmable second-order antialiasing filters with low-pass cutoffs ranging from 8 MHz to 18 MHz.

Applications

• Medical imaging and ultrasound systems
• Automotive radar sensors

Procurement Notes

Verify the specific speed grade suffix '-25' corresponds to the 25 MSPS operational limit when sourcing. Confirm that the 'RL' designation indicates reel packaging for surface-mount assembly. Ensure compatibility with the required 1.8 V and 3.0 V supply rails specified in the datasheet before procurement.

Selection Notes

Select this component for designs requiring high channel density in a compact footprint. The -25 speed grade is suitable for applications needing up to 25 MSPS per channel. Consider the 100-lead TQFP package for ease of prototyping compared to the BGA option. Verify thermal management requirements given the 940 mW total power dissipation.

Part Context

This part belongs to the AD9273 family of octal LNAs/VGAs/AAFs/ADCs. The 'B' indicates the industrial temperature range (-40°C to +85°C), while 'SVZ' denotes the 100-lead TQFP package and RoHS compliance. The '-25' suffix specifies the 25 MSPS speed bin, distinct from the -40 and -50 variants.

Replacement Considerations

Direct pin-compatible replacements within the same family include the AD9273BBCZ-40 (40 MSPS, BGA package) and AD9273BSVZRL-50 (50 MSPS, TQFP package). Ensure the selected replacement meets or exceeds the required sampling rate and package constraints.