Cirrus Logic CS3301A
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.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
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.