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| 型号： | MCP9800DM-TS1 |
| 厂商： | Microchip Technology |
| 文件页数： | 13/42页 |
| 文件大小： | 0K |
| 描述： | DEMO BOARD TEMP SENSOR MCP9800 |
| 标准包装： | 1 |
| 传感器类型： | 温度 |
| 传感范围： | -55°C ~ 125°C |
| 接口： | I²C，SM 总线 |
| 灵敏度： | ±0.5°C |
| 电源电压： | 2.7 V ~ 5.5 V |
| 嵌入式： | 是，MCU，8 位 |
| 已供物品： | 板，CD |
| 已用 IC / 零件： | MCP9800 |
| 产品目录页面： | 683 (CN2011-ZH PDF) |
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MCP9800/1/2/3
5.0
FUNCTIONAL DESCRIPTION
5.1
Temperature Sensor
The MCP9800/1/2/3 temperature sensor consists of a
band-gap type temperature sensor, a ?? Analog-to-
Digital Converter (ADC), user-programmable registers
and a 2-wire I 2 C protocol-compatible serial interface.
Resolution
The MCP9800/1/2/3 uses the difference in the base-
emitter voltage of a transistor while its collector current
is changed from IC 1 to IC 2 . With this method, the ? V BE
depends only on the ratio of the two currents and the
EQUATION 5-1:
? V BE = ? ? ? ? ? ln ? IC 1 ? IC 2 ?
------
One-Shot
Shutdown
Fault Queue
Alert Polarity
Alert Comp/Int
0.5°C
0.25°C
0.125°C
0.0625°C
Where:
kT
q
T = temperature in kelvin
? V BE = change in diode base-emitter
voltage
Register
Pointer
Configuration
Register
Temperature
Register
T HYST
Register
T SET
Register
I 2 C?
Interface
?? ADC
Band-Gap
Temperature
Sensor
k = Boltzmann's constant
q = electron charge
IC 1 and IC 2 = currents with n:1 ratio
5.2 ?? Analog-to-Digital Converter
A Sigma-Delta ADC is used to convert ? V BE to a digital
word that corresponds to the transistor temperature.
The converter has an adjustable resolution from 0.5°C
(at 30 ms conversion time) to 0.0625°C (at 240 ms
conversion time). Thus, it allows the user to make
trade-offs between resolution and conversion time.
FIGURE 5-1:
Functional Block Diagram.
Resolution” for details.
? 2010 Microchip Technology Inc.
DS21909D-page 13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP9800DM-TS1 | 制造商:Microchip Technology Inc 功能描述:TEMPERATURE SENSOR DEMO BOARD |
| MCP9801 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2-Wire High-Accuracy Temperature Sensor |
| MCP9801A0-M/MS | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2-Wire High-Accuracy Temperature Sensor |
| MCP9801A0-M/OT | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2-Wire High-Accuracy Temperature Sensor |
| MCP9801A0-M/SN | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2-Wire High-Accuracy Temperature Sensor |
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