Integrated Circuit Chip ADS1243IPW - Texas Instruments - 24-Bit ANALOG-TO-DIGITAL CONVERTER

Quick Detail:

24-Bit ANALOG-TO-DIGITAL CONVERTER

Description:

The ADS1242 and ADS1243 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.

Applications:

● 24 BITS NO MISSING CODES

● SIMULTANEOUS 50Hz AND 60Hz REJECTION (–90dB MINIMUM)

● 0.0015% INL

● 21 BITS EFFECTIVE RESOLUTION (PGA = 1), 19 BITS (PGA = 128)

● PGA GAINS FROM 1 TO 128

● SINGLE-CYCLE SETTLING

● PROGRAMMABLE DATA OUTPUT RATES

● EXTERNAL DIFFERENTIAL REFERENCE OF 0.1V TO 5V

● ON-CHIP CALIBRATION

● SPI™ COMPATIBLE

● 2.7V TO 5.25V SUPPLY RANGE

● 600µW POWER CONSUMPTION

● UP TO EIGHT INPUT CHANNELS

● UP TO EIGHT DATA I/O

Specifications:

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