The MCP9701AT-E\/TT from Microchip Technology is a low-power analog CMOS temperature sensor in SOT-23-3 package, providing a linear output voltage proportional to temperature with 400mV offset for negative temperature reading.<\/p>\n
| \u8f93\u51fa\u7c7b\u578b<\/td>\n | Analog voltage<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||
| Temperature Range<\/td>\n | -40 to +125 C (operating), -40 to +150 C (extended)<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||
| Accuracy<\/td>\n | +-2 C (0-70C), +-4 C (full range)<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||
| Sensitivity<\/td>\n | 19.53 mV\/C<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||
| Output Offset<\/td>\n | 400 mV at 0C<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||
| \u7535\u6e90\u7535\u538b<\/td>\n | 2.4 to 5.5V<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||
| Supply Current<\/td>\n | 6 uA typical<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||
| \u5305\u88c5<\/td>\n | SOT-23-3<\/td>\n<\/tr>\n<\/table>\n\u7279\u70b9<\/h2>\n400mV DC offset for negative temperature reading<\/td>\n<\/tr>\n | \u5e94\u7528<\/h2>\nProduct Overview The MCP9701AT-E\/TT from Microchip Technology is a low-power analog CMOS temperature sensor in SOT-23-3 package, providing a linear output voltage proportional to temperature with 400mV offset for negative temperature reading. Key Specifications Output Type Analog voltage Temperature Range -40 to +125 C (operating), -40 to +150 C (extended) Accuracy +-2 C (0-70C), +-4 […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,42],"tags":[],"chip_brand":[134],"class_list":["post-7598","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-sensors","chip_brand-microchip"],"acf":{"brief_explanation":"Analog CMOS temp sensor, -40\/+125C, +-2C accuracy, 19.53mV\/C, SOT-23-3, 6uA","date_code":"","package_case":"SOT-23-3 (2.9 x 1.3 x 1.0 mm)","in_stock":6506,"datasheet":"https:\/\/ww1.microchip.com\/downloads\/en\/DeviceDoc\/20001942G.pdf","price":"$0.38 @ 1ku","product_introduction":" The MCP9701AT-E\/TT from Microchip Technology is a low-cost, low-power analog CMOS temperature sensor that provides a linear voltage output proportional to the measured temperature. The device features a 400mV DC offset at 0C, which allows reading negative temperatures without a negative supply. The output coefficient is 19.53mV\/C, and the sensor provides an accuracy of +-2C over the 0C to +70C range. Operating from a single 2.4V to 5.5V supply, the MCP9701A consumes only 6uA typical, making it ideal for battery-powered applications. The sensor requires no external components and provides a direct analog interface to an ADC. The SOT-23-3 package minimizes board space, and the device is specified over the full -40C to +125C operating range with extended operation to +150C.<\/p>","working_principle":" The MCP9701AT-E\/TT operates through two main subsystems: (1) Temperature sensing element - A dedicated thermal sensing circuit using bipolar transistors generates a proportional-to-absolute-temperature (PTAT) voltage. The PTAT voltage increases linearly with temperature at a rate of approximately 19.53mV per degree Celsius. (2) Output conditioning - The raw PTAT voltage is amplified and combined with a 400mV DC offset to produce the final output voltage: VOUT = 400mV + (19.53mV\/C x T). At 0C, the output is 400mV; at +25C, it is approximately 888mV; at +125C, it is approximately 2841mV. The 400mV offset allows reading negative temperatures on a single-supply ADC (at -40C, output = 400 + 19.53*(-40) = -181mV from 0C reference, but the 400mV offset keeps the output positive at 219mV). The entire circuit is implemented in CMOS, resulting in the ultra-low 6uA supply current.<\/p>","pin_description":"
|