AD7711ARZ

AD7711 is a LC²MOS signal conditioning ADC with RTD excitation currents, complete analogue front end for low frequency measurement applications. The device accepts low level signals directly from a transducer and outputs a serial digital word. It employs a Ʃ-Δ conversion technique to realize up to 24 bits of no missing codes performance. The input signal is applied to a proprietary programmable gain front end based around an analogue 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 RTD transducers, process control, Smart transmitters and portable industrial instruments.

• Charge-balancing ADC: 24bits, no missing codes, ±0.0015% nonlinearity
• 2-ch programmable gain front end: gains from 1 to 128, 1 differential input, 1 single-ended input
• Low-pass filter with programmable filter cut-offs
• Ability to read/write calibration coefficients
• RTD excitation current sources
• Bidirectional microcontroller serial interface
• Internal/external reference option, single- or dual-supply operation
• Low power: 45mW max with 15mW max power-down mode at AVDD = DVDD = +5V, VSS = 0V or -5V
• 24 lead SOIC 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