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Ceramic Capacitor Sensor Signal Conditioning IC JHM2102

The JHM2102 is a CMOS integrated circuit for signal conditioning of ceramic capacitive sensors.

The JHM2102 is a CMOS integrated circuit for signal conditioning of ceramic capacitive pressure sensors, which is a kind of sensing element varies its capacitance as the pressure changes. The JHM2102 measures the capacitance and converts it to a voltage linearly proportional to the pressure. Compensation of sensor offset, sensitivity, non-linearity is implemented on-chip without external trimming components. The digital one-wire interface can be used for a simple calibration procedure in order to program a set of calibration coefficients into on-chip non-volatile memory. With an external reference capacitance, the JHM2102 can accommodate almost all kinds of ceramic capacitive sensing element with a pair of parallel plates. Thus, the ceramic capacitor and the JHM2102 are mated: fast and precise.

Features

Supply voltage4.5~5.5V
Average current~2.5mA
Typical value of error after cailbration<1.5%@(-40℃~125℃)
Operation temperature-40℃~150℃
Ratiometric analog voltage output0.54.5V
AvailableSOP8


Ÿ Accommodates 3-wires sensor assembly

Ÿ 32bit x 2 OTP for at most 2 times calibration

Ÿ Integrated sensor offset, sensitivity, non-linearity compensation

Ÿ Low temperature drift, very easy to achieve precision better than +/-2%FS over full temperature range

Ÿ Simple calibration process, 2 or 3 pressure points in room temperature

Ÿ Output response time ~1ms

JHM2102 Block Diagram

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Applications

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