CS3301A

CS3301A Low-noise, Programmable Gain, Differential Amplifier Features & Desription 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 outputs for CS5371A / 72A / 73A Max signal amplitude: 5 Vpp differential Low input bias: 1 nA typical z Outstanding Noise Performance 8.5 nV/ Hz from 0.1 Hz to 2 kHz 0.180 µVp-p between 0.1 Hz and 10 Hz z Low Total Harmonic Distortion -121 dB THD typical (0.0000891%) -112 dB THD maximum (0.0002512%) z Low Power Consumption Normal operation: 5.5 mA typical Power down: 10 µA typical z Small 24-pin SSOP Package z Bipolar Power Supply Configuration VA+ = +2.5 V; VA- = -2.5 V; VD = +3.3 V Description The CS3301A is a low-noise differential input, differential output amplifier with programmable gain, optimized for amplifying signals from low-impedance sensors such as geophones. 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 Ω termination can also be selected for noise tests. Amplifier noise performance is outstanding with a noise density of 8.5 nV/ Hz over the 0.1 Hz to 2 kHz bandwidth. Distortion performance is also extremely good, typically -121 dB THD at x1 gain. Flat noise down to 0.1 Hz and low total harmon...