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参数资料
| 型号： | MAX6622UE9A+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 14/18页 |
| 文件大小： | 196K |
| 描述： | IC PREC TEMP MONITOR 5CH 16TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 96 |
| 功能： | 温度监控系统（传感器） |
| 传感器类型： | 内部和外部 |
| 感应温度： | -40°C ~ 125°C，外部传感器 |
| 精确度： | -0.1°C 本地，±3°C 远程 |
| 拓扑： | ADC，缓冲器，寄存器库 |
| 输出类型： | SMBus? |
| 输出警报： | 是 |
| 输出风扇： | 是 |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 16-TSSOP |
| 包装： | 管件 |
5-Channel Precision Temperature Monitor
14 ______________________________________________________________________________________
BIT
NAME
POR
STATE
FUNCTION
7 (MSB)
Reserved
0
6
Reserved
0
Not Used. 0 at POR, then 1.
5
Reserved
0
Not Used. 0 at POR, then 1.
4
Diode fault 4
0
Channel 4 Remote-Diode Fault Bit. This bit is set to 1 when DXP4 and DXN4
are open circuit or when DXP4 is connected to V
CC
.
3
Diode fault 3
0
Channel 3 Remote-Diode Fault Bit. This bit is set to 1 when DXP3 and DXN3
are open circuit or when DXP3 is connected to V
CC
.
2
Diode fault 2
0
Channel 2 Remote-Diode Fault Bit. This bit is set to 1 when DXP2 and DXN2
are open circuit or when DXP2 is connected to V
CC
.
1
Diode fault 1
0
Channel 1 Remote-Diode Fault Bit. This bit is set to 1 when DXP1 and DXN1
are open circuit or when DXP1 is connected to V
CC
.
0
Reserved
0
Table 9. Status 3 Register
Applications Information
Remote-Diode Selection
The MAX6622 directly measures the die temperature of
CPUs and other ICs that have on-chip temperature-
sensing diodes (see the Typical Application Circuit) or
it can measure the temperature of a discrete diode-
connected transistor.
Effect of Ideality Factor
The accuracy of the remote temperature measure-
ments depends on the ideality factor (n) of the remote
diode (actually a transistor). The MAX6622 is opti-
mized for n = 1.015. A thermal diode on the substrate
of an IC is normally a pnp with the base and emitter
brought out the collector (diode connection) grounded.
DXP_ must be connected to the anode (emitter) and
DXN_ must be connected to the cathode (base) of this
pnp. If a sense transistor with an ideality factor other
than 1.015 is used, the output data is different from the
data obtained with the optimum ideality factor.
Fortunately, the difference is predictable. Assume a
remote-diode sensor designed for a nominal ideality
factor n
NOMINAL
is used to measure the temperature of
a diode with a different ideality factor n
1
. The measured
temperature T
M
can be corrected using:
where temperature is measured in Kelvin and
n
NOMINAL
for the MAX6622 is 1.015. As an example,
assume you want to use the MAX6622 with a CPU that
has an ideality factor of 1.002. If the diode has no
series resistance, the measured data is related to the
real temperature as follows:
For a real temperature of +85癈 (358.15K), the mea-
sured temperature is +80.41癈 (353.56K), an error of
-4.587癈.
Series Resistance Cancellation
Some thermal diodes on high-power ICs can have
excessive series resistance, which can cause tempera-
ture measurement errors with conventional remote tem-
perature sensors. Channel 1 of the MAX6622 has a
series resistance cancellation feature (enabled by bit 3
of the configuration 1 register) that eliminates the effect
of diode series resistance. Set bit 3 to 1 if the series
resistance is large enough to affect the accuracy of
channel 1. The series resistance cancellation function
increases the conversion time for channel 1 by 125ms.
This feature cancels the bulk resistance of the sensor
and any other resistance in series (wire, contact resis-
tance, etc.). The cancellation range is from 0 to 100?
T
T
n
n
T
T
ACTUAL M
NOMINAL
M
M
=
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
=
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
=
1
1 015
1 002
1 01297
.
.
( .
)
T T
n
n
M
ACTUAL
NOMINAL
=
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6622UE9A+ | 功能描述:板上安装温度传感器 5Ch Precision Temperature Monitor RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| MAX6622UE9A+T | 功能描述:板上安装温度传感器 5Ch Precision Temperature Monitor RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| MAX66240ETA+ | 制造商:Maxim Integrated Products 功能描述:HF 4KBIT SHA-256 SECURE EEPROM - Rail/Tube |
| MAX66240ETA+T | 制造商:Maxim Integrated Products 功能描述:HF 4KBIT SHA-256 SECURE EEPROM - Tape and Reel |
| MAX6625PMTT+ | 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL I2C 6TDFN EP - Rail/Tube |
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