AD7712ARZ

AD7712 is a LC²MOS signal conditioning ADC, complete analogue front end for low frequency measurement applications. The device has two analogue input channels and accepts either low level signals directly from a transducer or high level ( ±4 X VREF) signals, and outputs a serial digital word. It employs a sigma-delta conversion technique to realize up to 24bits of no missing codes performance. The low level input signal is applied to a proprietary programmable gain front end based around an analogue modulator. The high level analogue input is attenuated before being applied to the same modulator. The modulator output is processed by an on-chip digital filter. The first notch of this digital filter can be programmed via the on-chip control register, allowing adjustment of the filter cut-off and settling time. Typical applications include process control, smart transmitters, portable industrial instruments.

• Charge balancing ADC:24 bits no missing codes, ±0.0015% nonlinearity
• High level and low level analogue input channels
• Programmable gain for both inputs: gains from 1 to 128, differential input for low level channel
• Low-pass filter with programmable filter cut-offs
• Ability to read/write calibration coefficients
• Bidirectional microcontroller serial interface
• Internal/external reference option
• Single- or dual-supply operation and low power (25mW typ) with power-down mode (100µW typ)
• 24 lead WSOIC package
• Operating temperature range from -40 to 85°C

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ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party