AD9273BBCZ-40

Overview

The AD9273BBCZ-40 is an octal analog front-end integrated circuit manufactured by Analog Devices Inc. It integrates eight independent channels, each comprising a low noise preamplifier (LNA), a variable gain amplifier (VGA), an antialiasing filter (AAF), and a 12-bit analog-to-digital converter (ADC). The device supports sampling rates from 10 MSPS to 50 MSPS, with the -40 suffix indicating a guaranteed maximum speed of 40 MSPS. Key electrical specifications include a typical signal-to-noise ratio (SNR) of 64 dB at 5 MHz input frequency and a full-scale differential output voltage of 4.4 V p-p. Power consumption is rated at approximately 996 mW in full-channel mode.

Feature Summary

• Integrated Octal Signal Chain: Contains eight identical channels featuring LNA, VGA, AAF, and 12-bit ADCs within a single package.
• Programmable Gain and Filtering: Features SPI-programmable LNA gains (15.6/17.9/21.3 dB), VGA attenuation range (-42 dB to 0 dB), and programmable AAF low-pass filters (8 MHz to 18 MHz).
• High-Speed Serial Interface: Outputs digitized data via serial LVDS (ANSI-644 compliant) with dedicated data clock (DCO±) and frame clock (FCO±) outputs for simplified system synchronization.
• CW Doppler Support: Includes an 8 × 8 differential crosspoint switch to facilitate continuous wave Doppler applications with reduced power consumption.

Applications

• Medical imaging systems, specifically ultrasound scanners requiring multi-channel signal acquisition.
• Automotive radar sensors utilizing time gain control (TGC) architectures.
• Continuous wave (CW) Doppler measurement equipment.

Procurement Notes

Verify the specific speed grade suffix against the application's maximum required sampling rate. The AD9273 family includes variants such as the -25, -40, and -50, which denote different performance guarantees up to 25, 40, and 50 MSPS respectively. Ensure the selected variant meets the timing requirements for the target system design.

Selection Notes

Select the AD9273BBCZ-40 when the system requires up to 40 MSPS sampling per channel with integrated analog front-end conditioning. Consider the 144-ball BGA package for space-constrained designs or the 100-lead TQFP if preferred. Evaluate power dissipation requirements, noting that total power scales with the number of active channels and operating speed.

Part Context

The AD9273 belongs to a family of highly integrated analog front-end solutions designed to reduce component count in high-channel-count systems. It consolidates functions typically distributed across multiple discrete components into a single CMOS process chip. The BBCZ suffix indicates the industrial temperature range (-40°C to +85°C) and RoHS compliance.

Replacement Considerations

Direct functional replacements within the same package and pinout are limited. Designers may consider other members of the AD9273 family (e.g., AD9273BBCZ-25 or AD9273BBCZ-50) depending on whether lower or higher speed grades are acceptable for the specific application constraints.