ADI ADT7310高精度数字温度检测方案

ADI 公司的ADT7310是窄SOIC封装的高精度数字温度传感器,包括有能带隙温度基准和用来监视和数字化温度的13位ADC,分辨率达0.0625℃.ADT7310工作温度范围从-55度到+150度C,工作电压2.7V-5.5V,3,.3V时的平均电流为210uA.主要应用在医疗设备,环境控制系统,计算机热监视,热保护,工业过程控制,电源系统监视和手持设备.本文介绍ADT7310主要特性,方框图,以及温度传感器评估板主要特性,主/辅评估板电路图.
The ADT7310 is a high accuracy digital temperature sensor in a narrow SOIC package. It contains a band gap temperature reference and a 13-bit ADC to monitor and digitize the temperature to a 0.0625℃ resolution. The ADC resolution, by default, is set to 13 bits (0.0625℃). This can be changed to 16 bits (0.0078℃) by setting Bit 7 in the configuration register (Register Address 0x01).
The ADT7310 is guaranteed to operate over supply voltages from 2.7 V to 5.5 V. Operating at 3.3 V, the average supply current is typically 210 μA. The ADT7310 has a shutdown mode that powers down the device and offers a shutdown current of typically 2 μA. The ADT7310 is rated for operation over the −55°C to +150°C temperature range.
The CT pin is an open-drain output that becomes active when the temperature exceeds a programmable critical temperature limit. The default critical temperature limit is 147℃. The INT pin is also an open-drain output that becomes active when the temperature exceeds a programmable limit. The INT and CT pins can operate in either comparator or interrupt mode
ADT7310主要特性:
13- or 16-bit user selectable temperature-to-digital converter
Temperature accuracy ±0.5℃ from −40℃ to +105℃
No temperature calibration/correction required by user
Power saving 1 sample per second (SPS) mode
Fast first conversion on power-up of 6 ms
SPI-compatible interface
Operating temperature from −55℃ to +150℃
Operating voltage: 2.7 V to 5.5 V
Critical overtemperature indicator
Programmable overtemperature/undertemperature interrupt
Low power...