CXHA3181 is a precise digital thermometer that reports the temperature of 2 remote sensors and its own package. The remote sensors are diodeconnected transistors typically a low-cost, easily mounted

发布时间:2020-04-06 09:43:38 浏览次数:718 作者:嘉泰姆
摘要:CXHA3181 is a precise digital thermometer that reports the temperature of 2 remote sensors and its own package. The remote sensors are diodeconnected transistors typically a low-cost, easily mounted

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5.产品封装       6.电路原理图</strong>  mXj嘉泰姆

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The CXHA3181 is a precise digital thermometer that reports the temperature of 2 remote sensors and its own package. The remote sensors are diodeconnected transistors typically a low-cost, easily mounted 2N3904 NPN type that replace conventional thermistors or thermocouples. Remote accuracy is ±1°C with no calibration needed. It also has a build-in noise filtering function in remote sensor measuring the diode temperature. The remote channel can also measure the die temperature of other ICs, such as microprocessors, that contain an on-chip, diode-connected transistor. The 2-wire serial interface accepts standard System Management Bus (SMBus) Write Byte, Read Byte, Send Byte, and Receive Byte commands to program the alarm thresholds and to read temperature data. The data format is 11bits plus sign, with each bit corresponding to 0.125°C, in two’s-complement format. Measurements can be done automatically and autonomously, with the conversion rate programmed by the user or programmed to operate in a single-shot mode. The adjustable rate allows the user to control the supply current drain. The CXHA3181 is available in a small, 10-pin MSOP surface-mount package.

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„ Three Channels: Measures Two Remote and One Local Temperatures mXj嘉泰姆

„ Measure Thermal Diode with a Transistor Model mXj嘉泰姆

„ Support Single-Core, Dual-Core and Quad-Core CPU Application mXj嘉泰姆

„ No Calibration Required mXj嘉泰姆

„ Built-in Noise-Buster for Remote Sensor mXj嘉泰姆

„ SMBus 2-Wire Serial Interface mXj嘉泰姆

„ Programmable Under/Overtemperature Alarms mXj嘉泰姆

„ Supports SMBus Alert Response mXj嘉泰姆

„ Accuracy: ±1°C (+60°C to +100°C, remote) ±3°C (+60°C to + 100°C, local) mXj嘉泰姆

„ 320μA (typ) Average Supply Current During Conversion mXj嘉泰姆

„ Measure Thermal Diode with Transistor Model mXj嘉泰姆

„ Support 45nm, 65nm and 90nm CPU thermal diode mXj嘉泰姆

„ +3V to +5.5V Supply Range mXj嘉泰姆

„ Small 8-Lead SOP , MSOP and TDFN Package mXj嘉泰姆

„ Remote Temperature Measurment up to 160°C by using offset shifting method (see “Measure Remote Temperature Higher Than 127°C” section)mXj嘉泰姆

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