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The MCP9903/MCP9904 are high accuracy, low cost, System Management Bus (SMBus) temperature sensors. Advanced features such as Resistance Error Correction (REC), Beta Compensation (to support CPU diodes requiring the BJT/transistor model including 45nm and advanced processors) and automatic diode type detection combine to provide a robust solution for complex environmental monitoring applications.
The MCP9903 monitors three temperature channels and the MCP9904 monitors four temperature channels. It provides ±1ºC accuracy for both external and internal diode temperatures.
Resistance Error Correction automatically eliminates the temperature error caused by series resistance allowing greater flexibility in routing thermal diodes. Beta Compensation eliminates temperature errors caused by low, variable beta transistors common in today's fine geometry processors. The automatic beta detection feature monitors each external diode/transistor and determines the optimum sensor settings for accurate temperature measurements regardless of processor technology. This frees the user from providing unique sensor configurations for each temperature monitoring application. These advanced features plus ±1°C measurement accuracy provide a low-cost, highly flexible and accurate solution for critical temperature monitoring applications.
Features
Programmable SMBus Address
Support for diodes requiring the BJT/transistor model
supports 45nm and advanced CPU thermal diodes
Automatically determines external diode type and optimal settings
Resistance Error Correction
Up to 3 External Temperature Monitors
±1°C max accuracy (-40°C < TREMOTE < 125°C)
0.125°C resolution
Supports up to 2.2nF diode filter capacitor
Anti-parallel diodes for extra diode support
Internal Temperature Monitor
±1°C accuracy (-40°C < TAMBIENT < 65°C)
±0.125°C resolution
3.3V Supply Voltage
Programmable temperature limits for ALERT#
Available in these RoHS compliant packages
10-pin MSOP
Applications
Remote Radio Unit (RRU)
Basestation
Refrigeration
Industrial
Embedded applications
MCP9904 封装图
| 型号 | 制造商 | 描述 | 购买 |
|---|---|---|---|
| MCP9904T-2E/9Q | Renesas | IC REGIST BUFFER 25BIT DDR 96BGA | 立即购买 |
| MCP9904T-AE/9Q | Molex | CONN ADAPT 1000 BASE-T SFP | 立即购买 |
| MCP9904T-1E/9Q | SULLINS | CONN EDGE DUAL FMALE 72POS 0.156 | 立即购买 |
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