ADS1242 - 24 位 ADC，具有 4 通道、PGA 1:128、50/60Hz 槽口和 0.6mW 功耗

ADS1242是TI德州仪器公司的一款精密ADC(<=10MSPS)产品，ADS1242是24 位 ADC，具有 4 通道、PGA 1:128、50/60Hz 槽口和 0.6mW 功耗，本站介绍了ADS1242的封装应用图解、特点和优点、功能等，并给出了与ADS1242相关的TI元器件型号供参考。

ADS1242 - 24 位 ADC，具有 4 通道、PGA 1:128、50/60Hz 槽口和 0.6mW 功耗 - 精密ADC(<=10MSPS) - 模数转换器 - 德州仪器

产品描述

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.

产品特性

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
APPLICATIONS
- INDUSTRIAL PROCESS CONTROL
- LIQUID/GAS CHROMATOGRAPHY
- BLOOD ANALYSIS
- SMART TRANSMITTERS
- PORTABLE INSTRUMENTATION
- WEIGHT SCALES

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