参数资料
型号: MCP9800A0T-M/OT
厂商: Microchip Technology
文件页数: 13/42页
文件大小: 0K
描述: IC SENSOR THERMAL 2.7V SOT23-5
特色产品: MCP9800 2-Wire High-Accuracy Temperature Sensor
标准包装: 1
功能: 温度监控系统(传感器)
传感器类型: 内部
感应温度: -55°C ~ 125°C
精确度: ±2°C(最小值)
拓扑: ADC(三角积分型),寄存器库
输出类型: I²C?/SMBus?
输出警报:
输出风扇:
电源电压: 2.7 V ~ 5.5 V
工作温度: -55°C ~ 125°C
安装类型: 表面贴装
封装/外壳: SC-74A,SOT-753
供应商设备封装: SOT-23-5
包装: 标准包装
产品目录页面: 683 (CN2011-ZH PDF)
配用: MCP9800DM-TS1-ND - DEMO BOARD TEMP SENSOR MCP9800
其它名称: MCP9800A0T-M/OTDKR
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
ambient temperature, as shown in Equation 5-1 .
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
相关PDF资料
PDF描述
V72A48E400BG CONVERTER MOD DC/DC 48V 400W
172-009-212R031 CONN DB9 FEMALE DIP SOLDER TIN
GA342D1XGF220JY02L CAP CER 22PF 250V 5% SL 1808
V72A48E400BF3 CONVERTER MOD DC/DC 48V 400W
HBC65DRTN-S93 CONN EDGECARD 130PS DIP .100 SLD
相关代理商/技术参数
参数描述
MCP9800A1T-M/OT 制造商:Microchip Technology Inc 功能描述:digital temp sensor w -55 to +125 temp range & op volt range of +2.7 to + 5.5V
MCP9800A2T-M/OT 制造商:Microchip Technology Inc 功能描述:digital temp sensor w -55 to +125 temp range & op volt range of +2.7 to + 5.5V
MCP9800A3T-M/OT 制造商:Microchip Technology Inc 功能描述: 制造商:Microchip Technology Inc 功能描述:digital temp sensor w -55 to +125 temp range & op volt range of +2.7 to + 5.5V
MCP9800A5-M/MS 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2-Wire High-Accuracy Temperature Sensor
MCP9800A5-M/OT 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2-Wire High-Accuracy Temperature Sensor