• [ CXHA3182 ]"

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   产品概述 返回TOPOaD嘉泰姆

General Description The CXHA3182 is a precise digital thermometer that reports the temperature of both a remote sensor and its own package. The remote sensor is a diode-connected transistor 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 CXHA3182 and CXHA3182-1 have the same functions but different SMBus slave addresses. This allows for one of each to be on the bus at the same time. The CXHA3182 is available in a small, 8-pin SOP, MSOP and TDFN surface-mount package.

   产品特点 返回TOPOaD嘉泰姆

„ Two Channels: Measures Both Remote and Local Temperatures OaD嘉泰姆

„ No Calibration Required OaD嘉泰姆

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

„ SMBus 2-Wire Serial Interface OaD嘉泰姆

„ Programmable Under/Overtemperature Alarms OaD嘉泰姆

„ Supports SMBus Alert Response OaD嘉泰姆

„ Accuracy: ±1°C (+60°C to +100°C, remote) ±3°C (+60°C to + 100°C, local) „ 320μA (typ) Average Supply Current During Conversion OaD嘉泰姆

„ +3V to +5.5V Supply Range OaD嘉泰姆

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

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

 „ SMBus Inputs with Built-in MOS Switch to Prevent Reverse Current from Bus to IC VCCOaD嘉泰姆

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◀ 上一篇:CXHA3181三个通道测量两个远程和一个本地温度用晶体管模型测量热二极管 支持单核双核和四核CPU应用内置遥感器噪音抑制器SMBus 2线串行接口可编程欠温/超温报警支持SMBus警报响应

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下一篇▶:CXHA3183采用两位补码格式测量可以自动和自主地进行转换率由用户编程或编程为在单次拍摄模式下操作可调速率允许用户控制电源电流消耗内置遥感器噪音抑制器SMBus 2线串行接口可编程欠温/超温报警