资料下载
MCP9700/MCP9701低功耗有源线性热敏电阻芯片
分享资料个
MCP9700/9700A and MCP9701/9701A sensors with Linear Active Thermistor Integrated Circuit （IC） comprise a family of analog temperature sensors that convert temperature to analog voltage. The low-cost， low-power sensors feature 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 6 µA （typical） of operating current. Unlike resistive sensors， e.g.， thermistors， the Linear Active Thermistor IC does not require an additional signal-conditioning circuit. Therefore， the biasing circuit development overhead for thermistor solutions can be avoided by implementing a sensor from these low-cost devices. The Voltage Output pin （VOUT） can be directly connected to the ADC input of a microcontroller. The MCP9700/9700A and MCP9701/9701A temperature coefficients are scaled to provide a 1°C/bit resolution for an 8-bit ADC with a reference voltage of 2.5V and 5V， respectively. The MCP9700/9700A output 0.1°C/bit for a 12-bit ADC with 4.096V reference. The MCP9700/9700A and MCP9701/9701A provide a low-cost solution for applications that require measurement of a relative change of temperature. When measuring relative change in temperature from +25°C， an accuracy of ±1°C （typical） can be realized from 0°C to +70°C. This accuracy can also be achieved by applying system calibration at +25°C. In addition， this family of devices is immune to the effects of parasitic capacitance and can drive large capacitive loads. This provides printed circuit board （PCB） layout design flexibility by enabling the device to be remotely located from the microcontroller. Adding some capacitance at the output also helps the output transient response by reducing overshoots or undershoots. However， capacitive load is not required for the stability of sensor output.
声明：本文内容及配图由入驻作者撰写或者入驻合作网站授权转载。文章观点仅代表作者本人，不代表电子发烧友网立场。文章及其配图仅供工程师学习之用，如有内容侵权或者其他违规问题，请联系本站处理。 举报投诉
- 相关下载
- 相关文章
