Description

The CS5373A is a high-performance, fourth-order ∆Σ modulator integrated with a ∆Σ digital-to-analog converter (DAC). When combined with a CS3301A / CS3302A differential amplifier and the CS5378 digital filter, a small, low-power, self-testing, high-accuracy, single-channel measurement system results.

Modulator Features

● Fourth-order ∆Σ Architecture

• Clock-jitter-tolerant architecture

• Input signal bandwidth: DC to 2 kHz

• Max AC amplitude: 5 Vpp differential

• Max DC amplitude: ± 2.5 Vdc differential

● High Dynamic Range

• 127 dB SNR @ 215 Hz BW (2 ms sampling)

• 124 dB SNR @ 430 Hz BW (1 ms sampling)

● Low Total Harmonic Distortion

• -118 dB THD typical (0.000126)

• -112 dB THD maximum (0.000251)

● Low Power Consumption: 25 mW, 10 µW

Test DAC Features

● Digital ∆Σ Input from CS5378 Digital Filter

● Selectable Differential Analog Outputs

• Precision output (OUT±) for electronics tests

• Buffered output (BUF±) for sensor tests

● Multiple AC and DC Operational Modes

• Output signal bandwidth: DC to 100 Hz

• Max AC amplitude: 5 Vpp differential

• Max DC amplitude: + 2.5 Vdc differential

● Selectable Attenuation for CS3301A / CS3302A

• 1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64

● Outstanding Performance

• AC (OUT): -116 dB THD typical, -112 dB max

• AC (BUF): -108 dB THD typical, -90 dB max

• DC absolute accuracy: 0.4 typical, 1 max

● Low Power Consumption

• AC modes / DC modes: 40 mW / 20 mW

• Sleep mode / Power down: 1 mW / 10 µW

Common Features

● Extremely Small Footprint

• 28-pin SSOP package, 8 mm x 10 mm

● Bipolar Power Supply Configuration

• VA+ = +2.5 V; VA- = -2.5 V; VD = +3.3 V