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| 型号： | ADM1027ARQ-REEL |
| 厂商： | ON Semiconductor |
| 文件页数： | 16/56页 |
| 文件大小： | 1822K |
| 描述： | IC REMOTE THERMAL CTRLR 24-QSOP |
| 产品变化通告： | MFG CHG Notification ADI to ON Semi Product Discontinuation Notice 25/Aug/2008 |
| 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： | 0°C ~ 105°C，外部传感器 |
| 精确度： | ±1°C |
| 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： | 0°C ~ 105°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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REV. A
16
ADM1027
TEMPERATURE MEASUREMENT REGISTERS
Reg. 0x25 Remote 1 Temperature = 0x80 default
Reg. 0x26 Local Temperature = 0x80 default
Reg. 0x27 Remote 2 Temperature = 0x80 default
Reg. 0x77 Extended Resolution 2 = 0x00 default
<7:6> TDM2 = Remote 2 Temperature LSBs
<5:4> LTMP = Local Temperature LSBs
<3:2> TDM1 = Remote 1 Temperature LSBs
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.
Reg. 0x4E Remote 1 Temperature Low Limit = 0x81 default
Reg. 0x4F Remote 1 Temperature High Limit = 0x7F default
Reg. 0x50 Local Temperature Low Limit = 0x81 default
Reg. 0x51 Local Temperature High Limit = 0x7F default
Reg. 0x52 Remote 2 Temperature Low Limit = 0x81 default
Reg. 0x53 Remote 2 Temperature High Limit = 0x7F default
READING TEMPERATURE FROM THE ADM1027
It is important to note that temperature can be read from the
ADM1027 as an 8-bit value (with 1rC resolution), or as a 10-
bit value (with 0.25rC resolution). If only 1rC resolution is
required, the temperature readings can be read back at any time
and in no particular order.
If the 10-bit measurement is required, this involves a 2-register
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 regis-
ters have been read from. This prevents an MSB reading from
being updated while its two LSBs are being read, and vice versa.
ADDITIONAL ADC FUNCTIONS
A number of other functions are available on the ADM1027 to
offer the systems designer increased flexibility:
Turn Off Averaging
For each temperature measurement read from a value register,
16 readings have actually been made internally and the results
averaged before being placed into the value register. There may
be an instance where the user would like to take a very fast
measurement, e.g., of CPU temperature. Setting Bit 4 of Con-
figuration Register 2 (Reg. 0x73) turns averaging off. This takes
a reading every 13 ms. The measurement itself takes 4 ms.
Single-Channel ADC Conversions
Setting Bit 6 of Configuration Register 2 (Reg. 0x73) places the
ADM1027 into single-channel ADC conversion mode. In this
mode, the ADM1027 can be made to read a single temperature
channel only. If the internal ADM1027 clock is used, the selected
input will be read every 1.4 ms. The appropriate ADC channel
is selected by writing to Bits <7:5> of TACH1 minimum high
byte register (Reg. 0x55).
Bits <7:5> Reg 0x55
Channel Selected
101
Remote 1 Temp
110
Local Temp
111
Remote 2 Temp
Configuration Register 2 (Reg. 0x73)
<4> = 1 Averaging off
<6> = 1 Single-channel convert mode
TACH1 Minimum High Byte (Reg. 0x55)
<7:5> Selects ADC channel for single-channel convert mode
OVERTEMPERATURE EVENTS
Overtemperature events on any of the temperature channels can
be detected and dealt with automatically. Registers 0x6A to
0x6C are the THERM limits. When a temperature exceeds its
THERM limit, all fans will run at 100% duty cycle. The fans
will stay running at 100% until the temperature drops below
THERM 4rC.
FANS
THERM LIMIT
TEMP
100%
HYSTERESIS = 4C
Figure 15. THERM Limit Operation
Rev. 3 | Page 16 of 56 | www.onsemi.com
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参数描述 |
|---|---|
| ADM1027ARQ-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 |
| ADM1027ARQSMSC | 功能描述:IC SENSOR TEMP/FAN CTRL 制造商:analog devices inc. 系列:* 零件状态:上次购买时间 标准包装:1 |
| ADM1027ARQZ | 功能描述:板上安装温度传感器 VOLT THRM MGMT CNTRLR IC 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 |
| ADM1027ARQZ-REEL | 功能描述:板上安装温度传感器 VOLT THRM MGMT CNTRLR IC 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 |
| ADM1027ARQZ-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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