CS5374(V2) Datasheet PDF - Cirrus Logic

Description
The CS5374 combines two marine seismic analog measurement channels into one 7 mm x 7 mm QFN package. Each measurement channel consists of a high input impedance programmable gain differential amplifier that buffers analog signals into a high-performance, fourth-order ΔΣ modulator. The low-noise ΔΣ modulator converts the analog signal into a one-bit serial bit stream suitable for the CS5376A digital filter.

FEATUREs
● High Input Impedance Differential Amplifier
    • Ultra-low input bias: < 1 pA
    • Max signal amplitude: 5 Vpp differential
● Fourth Order Delta-Sigma (ΔΣ) Modulator
    • Signal Bandwidth: DC to 2 kHz
    • Common mode rejection: 110 dB CMRR
● Differential Analog Input, Digital ΔΣ Output
    • Multiplexed inputs: INA, INB, 800Ω termination
    • Selectable Gain: 1x, 2x, 4x, 8x, 16x, 32x, 64x
● Excellent Amplifier Noise Performance
    • 1.5 μVpp between 0.1 Hz and 10 Hz
    • 11 nV / √Hz from 200 Hz to 2 kHz
● High Modulator Dynamic Range
    • 126 dB SNR @ 215 Hz BW (2 ms sampling)
    • 123 dB SNR @ 430 Hz BW (1 ms sampling)
● Low Total Harmonic Distortion
    • –118 dB THD typical (0.000126%)
    • –108 dB THD maximum (0.0004%)
● Low Power Consumption
    • Normal operation: 6.5 mA per channel
    • Power down: 20 μA per channel max
● Dual Power Supply Configuration
    • VA+ = +2.5 V; VA– = –2.5 V; VD = +3.3 V