The JHM210X is a CMOS integrated circuit for signal conditioning of ceramic capacitive sensors. The ceramic capacitor pressure sensor is a kind of sensing element varies its capacitance as the pressure changes.
The JHM210X 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 OTP. With an external reference capacitance, the JHM210X 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.
Supply voltage 4.5V ~ 5.5V
Supply current ~ 4mA
Operation temperature -40°C ~ 135°C
Ratiometric analog voltage output 0.5 ~ 4.5V
Accommodates 3-wires sensor assembly
32bit x 2 OTP for at most 2 times calibration
Integrated sensor offset, sensitivity, non-linearity compensation
Low temperature drift, very easy to achieve precision better than +/-2%FS over full temperature range
Simple calibration process, 2 or 3 pressure points in room temperature
Output response time ~1ms
JHM2102 Block Diagram