CS5371A Datasheet | Cirrus Logic

Features ‰ ‰ ‰ ‰ ‰ Description The CS5371A and CS5372A are one- and two-channel, high-dynamic-range, fourth-order ∆Σ modulators intended for geophysical and sonar applications. When bined with CS3301A / CS3302A differential amplifiers, the CS4373A test DAC and CS5376A digital filter, a small, low-power, self-testing, high-accuracy, multichannel measurement system results. The modulators have high dynamic range and low total harmonic distortion with very low power consumption. They convert differential analog input signals from the CS3301A / CS3302A amplifiers to an oversampled serial bit stream at 512 kbits per second. This oversampled bit stream is then decimated by the CS5376A digital filter to a 24-bit output at the selected output word rate. In normal operation, power consumption is 5 m A per channel. Each modulator can be independently powered down to 500 µA per channel, and by halting the input clock they will enter a micro-power state using only 2 µA per channel. The CS5371A and CS5372A modulators are available in small 24-pin SSOP packages, providing exceptional performance in a very small footprint. ORDERING INFORMATION See page 31. Fourth-order ∆Σ Architecture Clock-jitter-tolerant Architecture Input Voltage: 5 Vpp Fully Differential Input Signal Bandwidth: DC to 2 k Hz High Dynamic Range - 127 d B SNR @ 215 Hz BW (2 ms sampling) - 124 d B SNR @ 430 Hz BW (1 ms sampling) ‰ Low Total Harmonic Distortion - -118 d B THD typical (0.000126%) - -112 d B THD maximum (0.000251%) ‰ Low Power Consumption - Normal operation: 25 m W per channel - Power down: 10 µW per channel Small Footprint, 24-pin SSOP package ‰ Multi-channel System Support - - - - ‰ 1-channel System: CS5371A 2-channel System: CS5372A 3-channel System: CS5371A + CS5372A 4-channel System: CS5372A + CS5372A ‰ Bipolar Power Supply Configuration - VA+ = +2.5 V; VA- = -2.5 V; VD = +3.3 V VA+ PWDN VA+ PWDN1 VD MFLAG1 MFLAG INR+ INF+ INFINRVREF+ VREF4th Order ∆Σ Modulator MDATA INR1+ INF1+...