The AD8332 is a dual channel ultralow noise, linear-in-dB, variable gain amplifier (VGA). Optimized for ultrasound systems, they are usable as a low noise variable gain element at frequencies up to 120 MHz. Included in each channel are an ultralow noise preamplifier (LNA), an X-AMP® VGA with 48 dB of gain range, and a selectable gain postamplifier with adjustable output limiting. The LNA gain is 19 dB with a single-ended input and differential outputs. Using a single resistor, the LNA input impedance can be adjusted to match a signal source without compromising noise performance. The 48 dB gain range of the VGA makes these devices suitable for a variety of applications. Excellent bandwidth uniformity is maintained across the entire range. The gain control interface provides precise linear-in-dB scaling of 50 dB/V for control voltages between 40 mV and 1 V. Factory trim ensures excellent part-to-part and channel-to-channel gain matching. Differential signal paths result in superb second- and third-order distortion performance and low crosstalk. The operating temperature range is -40°C to +85°C. The AD8332 is available in a 28-lead TSSOP and 32-lead LFCSP packages. The AD8332 is a dual version of the single AD8331 and quad AD8334. Applications * Ultrasound and sonar time-gain controls * High performance automatic gain control (AGC) systems * I/Q signal processing * High speed, dual ADC drivers * Ultralow noise preamplifier (preamp) * Voltage noise = 0.74 nV/√Hz * Current noise = 2.5 pA/√Hz * 3 dB bandwidth: 100 MHz * Low power: 145 mW/channel * Wide gain range with programmable postamp * −4.5 dB to +43.5 dB in LO gain mode * 7.5 dB to 55.5 dB in HI gain mode * Low output-referred noise: 48 nV/√Hz typical * Active input impedance matching * Optimized for 10-bit/12-bit ADCs * Selectable output clamping level * Single 5 V supply operation * AD8332 and AD8334 available in lead frame chip scale package https://elecena.pl/product/1759643/dual-vga-with-ultralow-noise-preamplifier-and-programmable-r 2011-07-24 https://elecena.pl/product/1759643/dual-vga-with-ultralow-noise-preamplifier-and-programmable-r 2018-03-29 https://elecena.pl/product/1759643/dual-vga-with-ultralow-noise-preamplifier-and-programmable-r 2025-01-20