MCP9700AE Low Power Linear Active Thermistor -40°C to +125°C - (AD66203)

Description:

The MCP9700/9700A and MCP9701/9701A Linear Active Thermistor™ integrated circuit (IC) family is an analog temperature sensor that converts temperature to analog voltage. It is a cost-effective, low-power sensor with an accuracy of ±2°C from 0°C to +70°C (MCP9700A/9701A) and ±4°C from 0°C to +70°C (MCP9700/9701) while consuming 6µA (typical) of operating current. Unlike resistive sensors (such as thermistors), the Linear Active Thermistor IC does not require additional signal conditioning circuitry. Therefore, the development overhead of biasing circuits for thermistor solutions can be avoided by implementing this low-cost device. The voltage output pin (VOUT) can be directly connected to the ADC input of a microcontroller. The temperature coefficients of the MCP9700/9700A and MCP9701/9701A are scaled to provide 1°C/bit resolution for an 8-bit ADC with a reference voltage of 2.5V and 5V, respectively. The MCP9700/9700A and MCP9701/9701A provide a low-cost solution for applications requiring measurement of relative temperature change. When measuring relative temperature change from +25°C, an accuracy of ±1°C (typical) can be achieved from 0°C to +70°C. This accuracy can also be achieved by applying system calibration to +25°C. In addition, this family is immune to the effects of parasitic capacitance and can drive large capacitive loads. This provides printed circuit board (PCB) layout design flexibility by allowing the device to be located remotely from the microcontroller. Adding some capacitance to the output also aids output transient response by reducing overshoots and undershoots. However, capacitive loading is not required for sensor output stability.

Data sheet