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The CS5371 and CS5372 are one and two channel high dynamic range, fourth-order Delta-Sigma modulators intended for geophysical and sonar applications. Used in combination with the CS5376 digital filter, a unique high-resolution A/D measurement system results. The CS5371 and CS5372 provide higher dynamic range and lower total harmonic distortion than our industry standard CS5321 modulator, while consuming significantly less power per channel. The modulators generate an oversampled serial bit stream at 512 kbits per second when operated from a clock frequency of 2.048 MHz. The CS5371 and CS5372 are available in a small, 24-pin, SSOP package providing exceptional performance in a very small footprint. In normal mode (LPWR = 0, MCLK = 2.048 MHz), power consumption is 25 mW per channel, and in low power mode (LPWR = 1, MCLK = 1.024MHz) power consumption is 15 mW per channel. Each modulator can be independently powered down to 1 mW per channel and, by halting the input clock to the modulators, can enter a micropower state using only 10 µW per channel.
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