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RAA2S4704B3HNP belongs to the Renesas mixed-signal sensor integrated circuit series and is specifically designed for high-performance scenarios. The RAA2S4704B3HNP acquires capacitance and conductance information from the measured impedance and can be used for precise evaluation over a wide frequency range. This flexibility makes it possible to measure in-phase and orthogonal phase sensor components and customize them according to specific environmental and application conditions.

The RAA2S4704B3HNP features configurable measurement schemes that can maximize the measurement rate based on the connected sensors or signal sources. The measurement can be initiated on demand using a predefined configuration set. The collected IQ data is transmitted via the SPI interface.

Main features

Provide data for impedance calculation, and the measurement results are proportional to the in-phase and quadratically phase components of the impedance on up to seven measurement channels (SIO)

All seven channels are equivalent; Up to three channels can be activated simultaneously

The adjustable measurement frequency range is from 50kHz to 150kHz

Equipped with internal and external temperature sensors

It offers up to 16 flexible measurement schemes, including SIO input, gain, average value and excitation frequency options

Ten expandable measurement ranges, capable of measuring capacitors up to 3200pF

High linearity, with an accuracy of ±1.5% FS, including temperature compensation (TC)

The sensitivity can reach up to 5fF/LSB (with no average value).

Supports 3.3V and 5V power supplies as well as power-saving mode

Stable and reliable input channel, capable of withstanding overvoltage up to 18V (maximum service life 1hr)

Complies with the requirements of ISO 26262:2018 ASIL-B for sensors and self-monitoring

The background data collection can achieve self-monitoring and sensor diagnosis

Built-in RC oscillator, with an optional external clock input

NVM for integrated circuit calibration and traceability data

The ambient temperature range is between -40 °C and 105 °C

QFN24 package in compliance with AEC-Q100 standard

Application scenarios

Hands-off detection (HOD

Capacitance induction and impedance measurement

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