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 800 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 Vp-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 -118 dB THD. Low input current, low noise, and low total harmonic distortion make this amplifier ideal for high-impedance differential sensors requiring maximum dynamic range.