AD7719BRUZ

AD7719 is a low voltage, low power, Factory-Calibrated 16-/24bit dual Ʃ -Δ ADC. The AD7719 is a complete analogue front end for low frequency measurement applications. It contains two high resolution Σ-∆ ADCs, switchable matched excitation current sources, low-side power switches, digital I/O port, and temperature sensor. The 24bit main channel with PGA accepts fully differential, unipolar and bipolar input signal ranges from 1.024 × REFIN1/128 to 1.024 × REFIN1. Signals can be converted directly from a transducer without the need for signal conditioning. The 16bit auxiliary channel has an input signal range of REFIN2 or REFIN2/2. Suitable for use in sensor measurement, temperature measurement, pressure measurement, weigh scales, portable instrumentation and 4 to 20mA transmitters.

• Programmable gain front end
• Simultaneous Sampling and Conversion of 2 signal sources
• Separate reference inputs for each channel and simultaneous 50Hz and 60Hz rejection at 20Hz
• Interface: 3-wire serial SPI®, QSPI™, MICROWIRE™ and DSP compatible and Schmitt trigger on SCLK
• Single 3V and 5V operation, normal: 1.5mA typ at 3V and power-down: 10A (32KHz crystal running)
• Rail to rail input buffer and PGA, 4bit digital I/O port, on-chip temperature sensor
• Dual switchable excitation current sources, low-side power switches and reference detect circuit
• ISOURCE Select™: 24bit no missing codes- main ADC
• 28 lead TSSOP package
• Operating temperature range from -40 to 85°C

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