CS3302A

CS3302A High-Z, Programmable Gain, Differential Amplifier Features & Description z Signal Bandwidth: DC to 2 kHz z Selectable Gain: x1, x2, x4, x8, x16, x32, x64 z Differential Inputs, Differential Outputs Multiplexed inputs: INA, INB, 800Ω termination Rough / fine charge outputs for CS5371A / 72A / 73A Max signal amplitude: 5 Vpp differential Ultra-low input bias: < 1 pA z Excellent Noise Performance 1 µVp-p between 0.1 Hz and 10 Hz 8.5 nV/ √Hz from 200 Hz to 2 kHz z Low Total Harmonic Distortion -118 dB THD typical (0.000126%) -112 dB THD maximum (0.000251%) z Low Power Consumption Normal operation: 5 mA Power down: 10 µA z Dual Power Supply Configuration VA+ = +2.5 V; VA- = -2.5 V;VD = +3.3 V Description The CS3302A is a high input-impedance, differential input, differential output amplifier with programmable gain, optimized for amplifying signals from high-impedance sensors such as hydrophones. The gain settings are binary weighted (x1, x2, x4, x8, x16, x32, x64) and are selected using simple pin settings. Two sets of external inputs, INA and INB, simplify system design as inputs from a sensor and test DAC. An internal 800Ω termination can also be selected for noise tests. Amplifier input impedance is very high, requiring less than 1 pA of input current. Noise performance is very good at 1 µVp-p between 0.1 Hz and 10 Hz, and a noise density of 8.5 nV/ √Hz over the 200 Hz to 2 kHz bandwidth. Distortion performance is also extremely good, typically ...