CXHA3178 CXHA3179 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

发布时间:2020-04-06 09:43:38 浏览次数:791 作者:嘉泰姆
摘要:CXHA3178 CXHA3179 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

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The CXHA3178 CXHA3179 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 CXHA3178 CXHA3179 is available in a small, 8-pin SOP, MSOP and TDFN surface-mount package.

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

„ Measure Thermal Diode with a Transistor Model jcp嘉泰姆

„ No Calibration Required jcp嘉泰姆

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

„ SMBus 2-Wire Serial Interface jcp嘉泰姆

„ Programmable Under/Overtemperature Alarms jcp嘉泰姆

„ Supports SMBus Alert Response jcp嘉泰姆

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

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

„ Measure Thermal Diode with Transistor Model jcp嘉泰姆

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

„ +3V to +5.5V Supply Range jcp嘉泰姆

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

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

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