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| 型号： | ADT7463ARQZ-REEL |
| 厂商： | ON Semiconductor |
| 文件页数： | 19/50页 |
| 文件大小： | 726K |
| 描述： | IC REMOTE THERMAL CTRLR 24-QSOP |
| 产品变化通告： | MFG CHG Notification ADI to ON Semi QSOP 24ld Pkg (MSL) Change 17/Jun/2010 |
| 标准包装： | 2,500 |
| 系列： | dBCool® |
| 功能： | 风扇控制，温度监控器 |
| 传感器类型： | 内部和外部 |
| 感应温度： | -40°C ~ 120°C，外部传感器 |
| 精确度： | ±1.5°C（最小值） |
| 拓扑： | ADC，比较器，风扇速度计数器，多路复用器，寄存器库 |
| 输出类型： | SMBus? |
| 输出警报： | 无 |
| 输出风扇： | 是 |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 120°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 24-QSOP |
| 包装： | 带卷 (TR) |
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ADT7463
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19
Table 17. TEMPERATURE MEASUREMENT
REGISTERS
Register
Description
Default
0x25
Remote 1 Temperature
0x80
0x26
Local Temperature
0x80
0x27
Remote 2 Temperature
0x80
0x77
Extended Resolution 2
0x00
Table 18. EXTENDED RESOLUTION TEMPERATURE
MEASUREMENT REGISTER BITS (REG. 0X77)
Bit
Mnemonic
Description
<7:6>
TDM2
Remote 2 Temperature LSBs
<5:4>
LTMP
Local Temperature LSBs
<3:2>
TDM1
Remote 1 Temperature LSBs
Reading Temperature from the ADT7463
It is important to note that temperature can be read from
the ADT7463 as an 8bit value (with 1癈 resolution) or as
a 10bit value (with 0.25癈 resolution). If only 1癈
resolution is required, the temperature readings can be read
back at any time and in no particular order.
If the 10bit measurement is required, this involves a
2register read for each measurement. The extended
resolution register (Reg. 0x77) should be read first. This
causes all temperature reading registers to be frozen until all
temperature reading registers have been read from. This
prevents an MSB reading from being updated while its
2 LSBs are being read and vice versa.
Nulling Out Temperature Errors
As CPUs run faster, it is getting more difficult to avoid
high frequency clocks when routing the D+, D traces
around a system board. Even when recommended layout
guidelines are followed, there may still be temperature
errors attributed to noise being coupled onto the D+/D
lines. High frequency noise generally has the effect of giving
temperature measurements that are too high by a constant
amount. The ADT7463 has temperature offset registers at
Addresses 0x70, 0x72 for the Remote 1 and Remote 2
temperature channels. By doing a onetime calibration of
the system, one can determine the offset caused by system
board noise and null it out using the offset registers. The
offset registers automatically add a twos complement 8bit
reading to every temperature measurement. The LSBs add
0.25癈 offset to the temperature reading so the 8bit register
effectively allows temperature offsets of up to ?2癈 with
a resolution of 0.25癈. This ensures that the readings in the
temperature measurement registers are as accurate as
possible.
Table 19. TEMPERATURE OFFSET REGISTERS
Register
Description
Default
0x70
Remote 1 Temperature Offset
0x00 (0癈)
0x71
Local Temperature Offset
0x00 (0癈)
0x72
Remote 2 Temperature Offset
0x00 (0癈)
Temperature Measurement Limit Registers
Associated with each temperature measurement channel
are high and low limit registers. Exceeding the programmed
high or low limit causes the appropriate status bit to be set.
Exceeding either limit can also generate SMBALERT
interrupts.
Table 20. TEMPERATURE MEASUREMENT LIMIT
REGISTERS
Register
Description
Default
0x4E
Remote 1 Temperature Low Limit
0x81
0x4F
Remote 1 Temperature High Limit
0x7F
0x50
Local Temperature Low Limit
0x81
0x51
Local Temperature High Limit
0x7F
0x52
Remote 2 Temperature Low Limit
0x81
0x53
Remote 2 Temperature High Limit
0x7F
Overtemperature Events
Overtemperature events on any of the temperature
channels can be detected and dealt with automatically in
automatic fan speed control mode. Registers 0x6A to 0x6C
are the THERM
limits. When a temperature exceeds its
THERM
limit, all fans run at 100% duty cycle. The fans stay
running at 100% until the temperature drops below THERM
Hysteresis (this can be disabled by setting the boost bit in
Configuration Register 3, Bit 2, Register 0x78). The
hysteresis value for that THERM
limit is the value
programmed into Registers 0x6D, 0x6E (hysteresis
registers). The default hysteresis value is 4癈.
Figure 27. THERM
Limit Operation
THERM
LIMIT
TEMPERATURE
FANS
100%
HYSTERESIS (癈)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADT7463ARQZ-REEL7 | 功能描述:IC REMOTE THERMAL CTRLR 24-QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:dBCool® 标准包装:1 系列:- 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:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6 |
| ADT7466 | 制造商:AD 制造商全称:Analog Devices 功能描述:dBCool Remote Thermal Controller and Voltage Monitor |
| ADT7466ARQZ | 功能描述:板上安装温度传感器 RMT THRM CTR VLT MON 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 |
| ADT7466ARQZ-REEL | 功能描述:板上安装温度传感器 RMT THRM CTR VLT MON 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 |
| ADT7466ARQZ-REEL7 | 功能描述:IC REMOTE THERMAL CTRLR 16QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:dBCool® 标准包装:1 系列:- 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:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6 |
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