ADS1243

24 位 ADC，具有 8 通道、PGA 1:128、50/60Hz 槽口 和 0.6mW 功耗

The ADS1242 and are precision, wide dynamic range, delta-sigma, analog-to-digital A/D converters with 24-bit resolution operating from 2.7V to 5.25V supplies. These delta-sigma, A/D converters provide up to 24 bits of no missing code performance and effective resolution of 21 bits.

The input channels are multiplexed. Internal buffering can be selected to provide a very high input impedance for direct connection to transducers or low-level voltage signals. Burnout current sources are provided that allow for the detection of an open or shorted sensor. An 8-bit digital-to-analog converter DAC provides an offset correction with a range of 50% of the FSR Full-Scale Range.

The Programmable Gain Amplifier PGA provides selectable gains of 1 to 128 with an effective resolution of 19 bits at a gain of 128. The A/D conversion is accomplished with a second-order delta-sigma modulator and programmable FIR filter that provides a simultaneous 50Hz and 60Hz notch. The reference input is differential and can be used for ratiometric conversion.

The serial interface is SPI compatible. Up to eight bits of data I/O are also provided that can be used for input or output. The ADS1242 and ADS1243 are designed for high-resolution measurement applications in smart transmitters, industrial process control, weight scales, chromatography, and portable instrumentation.

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24 BITS NO MISSING CODES

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SIMULTANEOUS 50Hz AND 60Hz REJEC ON -90dB MINIMUM

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0.0015% INL

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21 BITS EFFECTIVE RESOLUTION PGA = 1, 19 BITS PGA = 128

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PGA GAINS FROM 1 TO 128

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SINGLE-CYCLE SETTLING

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PROGRAMMABLE DATA OUTPUT RATES

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EXTERNAL DIFFERENTIAL REFERENCE OF 0.1V TO 5V

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ON-CHIP CALIBRATION

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SPI™ COMPATIBLE

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2.7V TO 5.25V SUPPLY RANGE

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600µW POWER CONSUMPTION

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UP TO EIGHT INPUT CHANNELS

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UP TO EIGHT DATA I/O

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APPLICATIONS

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INDUSTRIAL PROCESS CONTROL

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LIQUID/GAS CHROMATOGRAPHY

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BLOOD ANALYSIS

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SMART TRANSMITTERS

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PORTABLE INSTRUMENTATION

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WEIGHT SCALES

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