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Cirrus Logic - CS5532 AD Converter CS5532-BS AD Con
Best performing AD converter on the marketHigh accuracy 23 bit noise free resolution One of Cirruss highest running worldwide products Evaluation board availableChopper-stabilized PGIA 1x to 64x 6 nVvHz at 0.1 Hz No 1f noise at 64x 500 pA input current with gains 1 Delta-Sigma AD converterLinearity error 0.0007 FS Noise-free resolution up to 23 bits 2- or 4-channel differential mux Scalable input span via calibrationandplusmn 5 mV to differential andplusmn 2.5 V Scalable VREF input up to analog supply Simple 3-wire serial interfaceSPI and Microwire compatible Schmitt Trigger on serial clock SCLK Selectable word rates 6.25 to 3840 samples per second SPS Selectable 50 Hz or 60 Hz rejection Package 2024-pin SSOP The CS5532 highly integrated Delta-Sigma analog-to-digital AD converters use
charge-balance techniques to achieve 24-bit CS5532 performance. The AD converters are optimised for measuring low-level unipolar or bipolar signals in weigh scale process control scientific and medical applications.To accommodate these applications the AD converters come as 2-channel CS5532 device and include a very low noise chopper-stabilised instrumentation amplifier 6 nVvHz at 0.1 Hz with selectable gains of 1x 2x 4x 8x 16x 32x and 64x. These AD converters also include a fourth-order Delta-Sigma modulator followed by a digital filter which provides 20 selectable 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 samples per second SPS MCLK 4.9152 MHz.BPlease noteB The clock generation circuitry the on-chip oscillator and the
comparator that follow it may fail to generate a reliable clock for the convertor under some bipolar power supply conditions. To ensure proper operation when using the on-chip gate oscillator with the convertor powered from bipolar power supplies the following restriction is to be followedVD must be more positive than 3.2V and VA- cannot be more negative than -3.3-0.3 or -3.0V.For exampleIf VD 3.3V then VA- cannot be more negative than -3.3-0.3 or -3.0V.If the convertor is operated from a bipolar supply ofVA VD 3.3V and VA- -3.3VorVA VD 3.0V and VA- -3.0Vthe convertor should be driven from an external clock source.
charge-balance techniques to achieve 24-bit CS5532 performance. The AD converters are optimised for measuring low-level unipolar or bipolar signals in weigh scale process control scientific and medical applications.To accommodate these applications the AD converters come as 2-channel CS5532 device and include a very low noise chopper-stabilised instrumentation amplifier 6 nVvHz at 0.1 Hz with selectable gains of 1x 2x 4x 8x 16x 32x and 64x. These AD converters also include a fourth-order Delta-Sigma modulator followed by a digital filter which provides 20 selectable 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 samples per second SPS MCLK 4.9152 MHz.BPlease noteB The clock generation circuitry the on-chip oscillator and the
comparator that follow it may fail to generate a reliable clock for the convertor under some bipolar power supply conditions. To ensure proper operation when using the on-chip gate oscillator with the convertor powered from bipolar power supplies the following restriction is to be followedVD must be more positive than 3.2V and VA- cannot be more negative than -3.3-0.3 or -3.0V.For exampleIf VD 3.3V then VA- cannot be more negative than -3.3-0.3 or -3.0V.If the convertor is operated from a bipolar supply ofVA VD 3.3V and VA- -3.3VorVA VD 3.0V and VA- -3.0Vthe convertor should be driven from an external clock source.
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