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The CS5531/32/33/34 are highly integrated ΔΣ Analogto-Digital Converters (ADCs) which use charge-balancetechniques to achieve 16-bit (CS5531/33) and 24-bit(CS5532/34) performance. The ADCs are opTImized formeasuring low-level unipolar or bipolar signals in weighscale, process control, scienTIfic, and medicalapplicaTIons.To accommodate these applicaTIons, the ADCs come aseither two-channel (CS5531/32) or four-channel(CS5533/34) devices and include a very low noise chopper-stabilized instrumentation amplifier (6 nV/√Hz @ 0.1Hz) with selectable gains of 1×, 2×, 4×, 8×, 16×, 32×, and64×. These ADCs also include a fourth order ΔΣ modulatorfollowed by a digital filter which provides twentyselectable output word rates of 6.25, 7.5, 12.5, 15, 25, 30,50, 60, 100, 120, 200, 240, 400, 480, 800, 960, 1600,1920, 3200, and 3840 Sps (MCLK = 4.9152 MHz).To ease communication between the ADCs and a microcontroller,the converters include a simple three-wire serialinterface which is SPI and Microwire compatible witha Schmitt Trigger input on the serial clock (SCLK).High dynamic range, programmable output rates, andflexible power supply options makes these ADCs idealsolutions for weigh scale and process controlapplications.ORDERING INFORMATIONSee page 48
