AD7746ARUZ

AD7746 is a high resolution, Σ-Δ capacitance to digital converter (CDC). The capacitance to be measured is connected directly to the device inputs. The architecture features inherent high resolution (24-bit no missing codes, up to 21-bit effective resolution), high linearity (±0.01%) and high accuracy (±4fF factory calibrated). The AD7746 has two channels. The AD7746 is designed for floating capacitive sensors. The on-chip voltage reference and the on-chip clock generator eliminate the need for any external components in capacitive sensor applications. It is suitable for use in automotive, industrial and medical systems for pressure measurement, position sensing, level sensing, flowmeters, humidity sensing, impurity detection applications.

• 2.7V to 5.25V single-supply operation
• New standard in single chip solutions
• Interfaces to single or differential floating sensors
• 95dB CMRR at VIN = 1V, integral nonlinearity (INL) is ±0.01% of FSR
• Conversion input range ±4.096pF at factory calibrated
• 2-wire serial interface (I2C®-compatible)
• Temperature sensor on-chip: resolution: 0.1°C, accuracy: ±2°C
• Voltage input channel and internal clock oscillator
• 16 lead TSSOP package
• Operating temperature range from -40 to 125°C

Notes

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