AD7719

低电压，低功耗，工厂校准的16位/ 24位双通道ADC Low Voltage, Low Power, Factory-Calibrated 16-/24-Bit Dual ADC

Product Details

The is a complete analog front-end for low frequency measurement applications. It contains two high-resolution sigma delta ADCs, switchable matched excitation current sources, low-side power switches, digital I/O port and temperature sensor. The 24-bit main channel with PGA accepts fully differential, unipolar and bipolar input signal ranges from REFIN1/128 to REFIN1. Signals can be converted directly from a transducer without the need for signal conditioning. The 16-bit aux channel does not have a PGA and has an input signal range of REFIN2 or REFIN2/2.

### Features and Benefits

HIGH RESOLUTION Σ-Δ ADCS

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2 Independent ADCs 16- and 24-Bit Resolution

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Factory-Calibrated Field Calibration Not Required

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Output Settles in 1 Conversion Cycle Single Conversion Mode

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Programmable Gain Front End

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Simultaneous Sampling and Conversion of 2 Signal Sources

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Separate Reference Inputs for Each Channel

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Simultaneous 50 Hz and 60 Hz Rejection at 20 Hz Update Rate

ISOURCE SELECT™

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24-Bit No Missing Codes—Main ADC

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13-Bit p-p Resolution @ 20 Hz, 20 mV Range

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18-Bit p-p Resolution @ 20 Hz, 2.56 V Range

INTERFACE

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3-Wire Serial

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SPI®, QSPI™, MICROWIRE™, and DSP Compatible

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Schmitt Trigger on SCLK