AD9276BSVZ

The AD9276BSVZ from Analog Devices Inc. integrates eight channels of low-noise amplifier (LNA), variable gain amplifier (VGA), anti-aliasing filter (AAF), 12-bit analog-to-digital converter (ADC), and a CW I/Q demodulator into a single 100-TQFP exposed pad package. The LNA features SPI-programmable gain settings of 15.6 dB, 17.9 dB, and 21.3 dB with an input-referred noise of 0.75 nV/√Hz and bandwidth exceeding 100 MHz. The VGA provides an attenuator range of -42 dB to 0 dB followed by a postamp with programmable gains of 21 dB, 24 dB, 27 dB, or 30 dB.

The AAF is a programmable second-order low-pass filter with cutoff frequencies from 8 MHz to 18 MHz. The ADC operates at sampling rates from 10 MSPS to 80 MSPS, achieving a typical SNR of 70 dB and SFDR of 75 dB. Data is output via serial LVDS with a double data rate clock up to 480 MHz. The CW I/Q demodulator offers individual programmable phase rotation and an output dynamic range greater than 160 dBFS/√Hz per channel.

Power dissipation is 195 mW per channel in TGC mode at 40 MSPS and 94 mW per channel in CW Doppler mode. The device supports flexible power-down modes and offers fast overload recovery (<10 ns) and standby recovery (<2 μs). The surface-mount package is 100-lead TQFP with exposed pad, suitable for compact designs.