AD9273BBCZ-40

The AD9273BBCZ-40 is an octal low-noise amplifier (LNA), variable gain amplifier (VGA), anti-aliasing filter (AAF), and analog-to-digital converter (ADC) integrated circuit from Analog Devices. It also includes an 8×8 differential crosspoint switch for continuous wave (CW) Doppler applications. Each of the eight channels provides a complete signal chain from a single-ended ultrasound transducer input to a 12-bit digital output at sampling rates up to 40 MSPS.

The LNA features an input-referred noise voltage of 1.26 nV/√Hz at 21.3 dB gain, with SPI-programmable gain settings of 15.6 dB, 17.9 dB, and 21.3 dB. The VGA offers an attenuator range of -42 dB to 0 dB and programmable PGA gains of 21 dB, 24 dB, 27 dB, and 30 dB. The AAF is a programmable second-order low-pass filter with cutoff frequencies from 8 MHz to 18 MHz. The ADC achieves typical SNR of 70 dB and SFDR of 75 dB.

Power consumption is 109 mW per channel in time-gain compensation (TGC) mode at 12 bits and 40 MSPS, and 70 mW per channel in CW Doppler mode. The device operates from dual supply voltages of 1.8V and 3V, and features a serial LVDS data output interface. The AD9273BBCZ-40 is housed in a 144-ball CSPBGA (10x10 mm) package and is rated for an operating temperature range of -40°C to 85°C.