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参数资料
| 型号： | ADM1027ARQZ-RL7 |
| 厂商： | ON Semiconductor |
| 文件页数： | 5/56页 |
| 文件大小： | 1822K |
| 描述： | IC REMOTE THERMAL CTLR 24QSOP |
| 产品变化通告： | MFG CHG Notification ADI to ON Semi Product Discontinuation Notice 25/Aug/2008 Product Obsolescence 30/Sept/2009 |
| 标准包装： | 1,000 |
| 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
ADM1027
5
PIN FUNCTION DESCRIPTIONS
Pin
Mnemonic
Description
1
SDA
Digital I/O (Open-Drain). SMBus bidirectional serial data. Requires SMBus pull-up.
2
SCL
Digital Input (Open-Drain). SMBus serial clock input. Requires SMBus pull-up.
3
GND
Ground Pin for the ADM1027.
4
V
CC
Power Supply. Can be powered by 3.3 V standby if monitoring in low power states is required.
V
CC
is also monitored through this pin. The ADM1027 can also be powered from a 5 V supply.
Setting Bit 7 of Configuration Register 1 (Reg. 0x40) rescales the V
CC
input attenuators to
correctly measure a 5 V supply.
5
VID0
Digital Input (Open-Drain). Voltage supply readouts from CPU. This value is read into the
VID register (Reg. 0x43).
6
VID1
Digital Input (Open-Drain). Voltage supply readouts from CPU. This value is read into the
VID register (Reg. 0x43).
7
VID2
Digital Input (Open-Drain). Voltage supply readouts from CPU. This value is read into the
VID register (Reg. 0x43).
8
VID3
Digital Input (Open-Drain). Voltage supply readouts from CPU. This value is read into the
VID register (Reg. 0x43).
9
TACH3
Digital Input (Open-Drain). Fan tachometer input to measure speed of Fan 3. Can be
reconfigured as an analog input (AIN3) to measure the speed of 2-wire fans.
10
PWM2/SMBALERT
Digital Output (Open-Drain). Requires 10 kW typical pull-up. Pulsewidth modulated output
to control Fan 2 speed. This pin may be reconfigured as an SMBALERT interrupt output to
signal out-of-limit conditions.
11
TACH1
Digital Input (Open-Drain). Fan tachometer input to measure speed of Fan 1. Can be
reconfigured as an analog input (AIN1) to measure the speed of 2-wire fans.
12
TACH2
Digital Input (Open-Drain). Fan tachometer input to measure speed of Fan 2. Can be
reconfigured as an analog input (AIN2) to measure the speed of 2-wire fans.
13
PWM3/ADDRESS ENABLE Digital I/O (Open-Drain). Pulsewidth modulated output to control Fan 3 speed. Requires
10 kW typical pull-up. If pulled low on power-up, this places the ADM1027 into address
select mode, and the state of Pin 14 will determine the ADM1027s slave address.
14
TACH4/ADDRESS SELECT Digital Input (Open-Drain). Fan tachometer input to measure speed of Fan 4. Can be reconfigured
as an analog input (AIN4) to measure the speed of 2-wire fans. If in address select mode,
this pin determines the SMBus device address.
15
D2
Cathode Connection to Second Thermal Diode.
16
D2+
Anode Connection to Second Thermal Diode.
17
D1
Cathode Connection to First Thermal Diode.
18
D1+
Anode Connection to First Thermal Diode.
19
VID4
Digital Input (Open-Drain). Voltage supply readouts from CPU. This value is read into the
VID register (Reg. 0x43).
20
5V
IN
Analog Input. Monitors 5 V power supply.
21
12V
IN
Analog Input. Monitors 12 V power supply.
22
2.5V
IN
Analog Input. Monitors 2.5 V supply, typically a chipset voltage.
23
V
CCP
Analog Input. Monitors processor core voltage (0 V to 3 V).
24
PWM1/XTO
Digital Output (Open-Drain). Pulsewidth modulated output to control Fan 1 speed. Requires
10 kW typical pull-up. Also functions as the output from the XOR tree in XOR test mode.
Rev. 3 | Page 5 of 56 | www.onsemi.com
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