产品概述 返回TOPrwJ嘉泰姆

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.

   产品特点 返回TOPrwJ嘉泰姆

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

„ Measure Thermal Diode with a Transistor Model rwJ嘉泰姆

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

„ No Calibration Required rwJ嘉泰姆

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

„ SMBus 2-Wire Serial Interface rwJ嘉泰姆

„ Programmable Under/Overtemperature Alarms rwJ嘉泰姆

„ Supports SMBus Alert Response rwJ嘉泰姆

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

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

„ Measure Thermal Diode with Transistor Model rwJ嘉泰姆

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

„ +3V to +5.5V Supply Range rwJ嘉泰姆

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

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

   应用范围 返回TOPrwJ嘉泰姆

Desktop and Notebook rwJ嘉泰姆

Central Office rwJ嘉泰姆

Computers rwJ嘉泰姆

Telecom Equipment rwJ嘉泰姆

Smart Battery Packs rwJ嘉泰姆

Test and Measurement rwJ嘉泰姆

LAN Servers rwJ嘉泰姆

Multi-Chip Modules rwJ嘉泰姆

Industrial ControllersrwJ嘉泰姆

   技术规格书（产品PDF) 返回TOP rwJ嘉泰姆

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