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 voltage | 4.5~5.5V |
| Average current | ~2.5mA |
| Typical value of error after cailbration | <1.5%@(-40℃~125℃) |
| Operation temperature | -40℃~135℃ |
| Ratiometric analog voltage output | 0.54.5V |
| Available | SOP8 |
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
Applications
