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MCP9700/MCP9701 Chinese data sheet

2018-10-31
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The MCP9700/01 Linear ActiveThermistor™ Integrated Circuit (IC) is an analog temperature sensor that converts temperature to an analog voltage. It is a low-cost, low-power sensor with an accuracy of ±4°C from 0°C to +70°C and a typical operating current of 6 μA. Unlike resistive sensors such as thermistors, Linear Active Thermistor ICs do not require additional signal conditioning circuitry. Therefore, using this low-cost device can save the expense of developing bias circuits in thermistor solutions. The voltage output pin (VOUT) can be directly connected to the ADC input of a microcontroller. The temperature coefficient of both the MCP9700 and MCP9701 are trimmed to achieve a resolution of 1 °C/bit for an 8-bit ADC with reference voltages of 2.5V and 5V, respectively. The MCP9700/01 provides a low-cost solution for applications that require measuring relative changes in temperature. When measuring relative temperature changes from 25°C, the accuracy is ±1°C (typical) from 0°C to 70°C. This accuracy can also be achieved by calibrating the system at 25°C. In addition, this series is not affected by parasitic capacitance and can drive large capacitive loads. This allows the device to be located away from the microcontroller, providing flexibility in printed circuit board (PCB) layout. Connecting capacitors to the output reduces overshoot and undershoot, and also helps improve output transient response performance. However, capacitive loads are not required to achieve output stability of the sensor.

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