The MCP9700 is an analog output temperature sensor that integrates the sensing element and signal‑conditioning circuitry on a single CMOS chip. Its linear voltage output makes it easy to use in embedded systems, offering advantages such as low power consumption and a wide operating voltage range.
The note details how to connect the MCP9700 to PIC microcontrollers using the PICkit 1 development kit, including recommended PCB layout, external filtering components, firmware flow, and software routines for converting ADC readings to temperature values. It also describes the optional PICtail evaluation board and standalone operation of the sensor. This manual is written in Chinese.
| Operating voltage | 2.5 V to 5.5 V |
|---|---|
| Output impedance (typical) | < 192 Ω |
| Output impedance (range for bipolar devices) | 200 Ω to 2000 Ω |
| Recommended external filter capacitor | 1 nF – 100 nF |
The MCP9700 operates with a supply voltage between 2.5 V and 5.5 V.
Use a ceramic capacitor placed close to the Vpp and ground pins, with a value between 0.1 µF and 1 µF.