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| 型号： | ADM1031ARQZ-REEL7 |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 温度/湿度传感器 |
| 英文描述： | DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 3Cel, RECTANGULAR, SURFACE MOUNT |
| 封装： | LEAD FREE, MO-137AB, QSOP-16 |
| 文件页数： | 33/36页 |
| 文件大小： | 596K |
| 代理商： | ADM1031ARQZ-REEL7 |
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ADM1031
Rev. B | Page 6 of 36
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
TACH1/AIN1
PWM_OUT2
TACH2/AIN2
THERM
VCC
GND
PWM_OUT1
SDA
INT(SMBALERT)
ADD
D1+
FAN_FAULT
D1–
D2–
D2+
SCL
TOP VIEW
(Not to Scale)
ADM1031
02402-003
Figure 3. Pin Configuration
Table 4. Pin Function Descriptions
Pin
No.
Mnemonic
Description
1
PWM_OUT1
Digital Output, Open-Drain. Pulse width modulated output to control fan speed. Requires pull-up resistor
(10 kΩ typical).
2
TACH1/AIN1
Digital/Analog Input. Fan tachometer input to measure FAN1 fan speed. Can be reprogrammed as an analog
input to measure speed of a 2-wire fan via a sense resistor (2 Ω typical).
3
PWM_OUT2
Digital Output, Open-Drain. Pulse width modulated output to control FAN2 fan speed. Requires pull-up resistor
(10 kΩ typical).
4
TACH2/AIN2
Digital/Analog Input. Fan tachometer input to measure FAN2 fan speed. Can be reprogrammed as an analog
input to measure speed of a 2-wire fan via a sense resistor (2 Ω typical).
5
GND
System Ground.
6
VCC
Power. Can be powered by 3.3 V standby power if monitoring in low power states is required.
7
THERM
Digital I/O, Open-Drain. An active low thermal overload output that indicates a violation of a temperature set
point (overtemperature). Also acts as an input to provide external fan control. When this pin is pulled low by
an external signal, a status bit is set, and the fan speed is set to full-on. Requires pull-up resistor (10 kΩ).
8
FAN_FAULT
Digital Output, Open-Drain. Can be used to signal a fan fault. Drives second fan to full speed if one fan fails.
Requires pull-up resistor (typically 10 kΩ).
9
D1–
Analog Input. Connected to cathode of first remote temperature-sensing diode. The temperature-sensing
element is either a Pentium III substrate transistor or a general-purpose 2N3904.
10
D1+
Analog Input. Connected to anode of first remote temperature-sensing diode.
11
D2–
Analog Input. Connected to cathode of second remote temperature-sensing diode.
12
D2+
Analog Input. Connected to anode of second remote temperature-sensing diode.
13
ADD
Three-State Logic Input. Sets two lower bits of device SMBus address.
14
INT (SMBALERT)
Digital Output, Open-Drain. Can be programmed as an interrupt (SMBus ALERT) output for temperature/fan
speed interrupts. Requires pull-up resistor (10 kΩ typical).
15
SDA
Digital I/O, Serial Bus Bidirectional Data. Open-drain output. Requires pull-up resistor (2.2 kΩ typical).
16
SCL
Digital Input, Serial Bus Clock. Requires pull-up resistor (2.2 kΩ typical).
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