JHM2051 is a low-power, high-precision signal conditioning integrated circuit designed for single capacitive sensors. The sensor capac is directly connected to the chip and converted into a digital signal by the internal 16-bit ΣΔCDC circuit of the chip, with a capacitance resolution of to 40aF (13.4 bit) and a peak-to-peak resolution of up to 280 aF (10.7 bit).

JHM2051 supports single capacitance measurement, with a maximum range of capacitance change of 0.94pF or 0.47F, and a maximum common mode capacitance range of 7pF or 3.5pF. The programmable digital-to-capacitance converter can compensate the input common mode capacitance.

JHM2051 has a built-in high-linearity temperature sensor with a temperature resolution of up to 0.04℃ . The chip integrates a digital compensation function that can simultaneously calibrate and compensate for the nonlinearity, sensitivity temperature drift, and zero temperature drift of the capacitive sensor, and coefficients of the compensation algorithm are saved in the on-chip integrated programmable memory (OTP). Users can read the calibrated values through the I2C interface.

Support single capacitance sensor

Capacitance effective resolution is about 40 aF (13.4 bit, range 4.7 pF)

Measuring capacitance change range: 0.94 pF or 0.47 pF

Measuring capacitance common mode range: 7 pF or 3.5 pF

Integrated non-linearity and temperature compensation, can compensate for the sensor's zero temperature drift, sensitivity temperature drift and nonlinearity up to order simultaneously

With non-volatile memory (OTP), can save the calibration parameters of the sensor, supports up to two burns

I2C communication protocol can be selected supporting Standard, Fast mode, Fast mode plus mode ~4μA @ 1Hz ODR