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| 型号： | ADT7468ARQ |
| 厂商： | ON Semiconductor |
| 文件页数： | 75/81页 |
| 文件大小： | 0K |
| 描述： | IC REMOTE THERMAL CTRLR 24-QSOP |
| 产品变化通告： | MFG CHG Notification ADI to ON Semi Product Obsolescence 11/Feb/2009 |
| 标准包装： | 56 |
| 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： | ±2°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： | 管件 |
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ADT7468
Table 44. Local Temperature Offset
Register Address
0x71
<7:0>
R/W 1
Read/write
Read/write
Description
Local temperature offset.
Allows a twos complement offset value to be
Power-On Default
0x00
automatically added to or subtracted from the local
temperature reading. LSB value = 0.5°C.
1
This register becomes read-only when the Configuration Register 1 lock bit is set to 1. Any further attempts to write to this register have no effect.
Table 45. Remote 2 Temperature Offset
Register Address
0x72
<7:0>
R/W 1
Read/write
Read/write
Description
Remote 2 temperature offset.
Allows a twos complement offset value to be
Power-On Default
0x00
automatically added to or subtracted from the
Remote 2 temperature reading. This is to
compensate for any inherent system offsets such as
PCB trace resistance. LSB value = 0.5°C.
1
This register becomes read-only when the Configuration Register 1 lock bit is set to 1. Any further attempts to write to this register have no effect.
Table 46. Register 0x73—Configuration Register 2 (Power-On Default = 0x00)
Bit
0
Name
AIN1
R/W 1
Read/write
Description
AIN1 = 0, speed of 3-wire fans measured using the TACH output from the fan.
AIN1 = 1, Pin 6 is reconfigured to measure the speed of 2-wire fans using an external sensing
resistor and coupling capacitor. AIN voltage threshold is set via Configuration Register 4 (Reg.
0x7D). Only relevant in low frequency mode.
1
AIN2
Read/write
AIN2 = 0, speed of 3-wire fans measured using the TACH output from the fan.
AIN2 = 1, Pin 7 is reconfigured to measure the speed of 2-wire fans using an external sensing
resistor and coupling capacitor. AIN voltage threshold is set via Configuration Register 4 (Reg.
0x7D). Only relevant in low frequency mode.
2
AIN3
Read/write
AIN3 = 0, speed of 3-wire fans measured using the TACH output from the fan.
AIN3 = 1, Pin 4 is reconfigured to measure the speed of 2-wire fans using an external sensing
resistor and coupling capacitor. AIN voltage threshold is set via Configuration Register 4 (Reg.
0x7D). Only relevant in low frequency mode.
3
AIN4
Read/write
AIN4 = 0, speed of 3-wire fans measured using the TACH output from the fan.
AIN4 = 1, Pin 9 is reconfigured to measure the speed of 2-wire fans using an external sensing
resistor and coupling capacitor. AIN voltage threshold is set via Configuration Register 4 (Reg.
0x7D). Only relevant in low frequency mode.
4
AVG
Read/write
AVG = 1, averaging on the temperature and voltage measurements is turned off. This allows
measurements on each channel to be made much faster.
5
ATTN
Read/write
ATTN = 1, the ADT7468 removes the attenuators from the 2.5 V, V CCP , 5 V, and 12 V inputs.
These inputs can be used for other functions such as connecting up external sensors. It is
possible to remove attenuators from individual channels using Bits <7:4> of Configuration
Register 4 (0x7D).
6
CONV
Read/write
CONV = 1, the ADT7468 is put into a single-channel ADC conversion mode. In this mode, the
ADT7468 can be made to read continuously from one input only, for example, Remote 1
temperature. The appropriate ADC channel is selected by writing to Bits <7:5> of TACH1
minimum high byte register (0x55).
Bits <7:5> Reg. 0x55
000 2.5 V
001 V CCP
010 V CC (3.3 V)
011 5 V
100 12 V
101 Remote 1 temperature
110 Local temperature
111 Remote 2 temperature
7
SHDN
Read/write
SHDN = 1, ADT7468 goes into shutdown mode. All PWM outputs assert low (or high
depending on state of INV bit) to switch off all fans. The PWM current duty cycle registers
read 0x00 to indicate that the fans are not being driven.
1
This register becomes read-only when the Configuration Register 1 lock bit is set to 1. Any further attempts to write to this register have no effect.
Rev. 3 | Page 75 of 81 | www.onsemi.com
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| ADT7468ARQ-REEL | 功能描述:IC REMOTE THERMAL CTRLR 24-QSOP RoHS:否 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 |
| ADT7468ARQ-REEL7 | 功能描述:IC REMOTE THERMAL CTRLR 24-QSOP RoHS:否 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 |
| ADT7468ARQZ | 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 |
| ADT7468ARQZ-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 |
| ADT7468ARQZ-REEL7 | 功能描述:IC REMOTE THERMAL CTRLR 24QSOP 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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