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| 型号： | ADM1031ARQZ |
| 厂商： | ON Semiconductor |
| 文件页数： | 7/32页 |
| 文件大小： | 0K |
| 描述： | IC SENSOR 2-TEMP/FAN CTRL 16QSOP |
| 产品变化通告： | MFG CHG Notification ADI to ON Semi Product Discontinuation 30/Sept/2011 |
| 标准包装： | 98 |
| 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 ~ 100°C，外部传感器 |
| 精确度： | ±1°C 本地，±0.5°C 远程 |
| 拓扑： | ADC，比较器，多路复用器，寄存器库 |
| 输出类型： | SMBus? |
| 输出警报： | 是 |
| 输出风扇： | 是 |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | 0°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 管件 |
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ADM1031
Functional Description
The ADM1031 is a temperature monitor and dual PWM
fan controller for microprocessor-based systems. The
device communicates with the system via a serial System
Management Bus (SMBus). The serial bus controller has a
hardwired address pin for device selection (Pin 13), a serial
data line for reading and writing addresses and data (Pin 15),
and an input line for the serial clock (Pin 16). All control and
programming functions of the ADM1031 are performed
over the serial bus. The device also supports Alert Response
Address (ARA).
Internal Registers
Brief descriptions of the ADM1031’s principal internal
registers are given below. For more detailed information on
the function of each register, see Table 18 through Table 33.
Configuration Register
This register controls and configures various functions on
the device.
defines the range over which auto fan control is provided,
and hence determines the temperature at which the fan is run
at full speed.
Serial Bus Interface
Control of the ADM1031 is carried out via the SMBus.
The ADM1031 is connected to this bus as a slave device,
under the control of a master device, for example, the 810
chipset.
The ADM1031 has a 7-bit serial bus address. When the
device is powered up, it does so with a default serial bus
address. The five MSBs of the address are set to 01011; the
two LSBs are determined by the logical state of Pin 13
(ADD). This is a three-state input that can be grounded,
connected to V CC , or left open-circuit to give three different
addresses. The state of the ADD pin is only sampled at
powerup, so changing ADD with power on has no effect
until the device is powered off, then on again.
Table 5. ADD PIN TRUTH TABLE
Address Pointer Register
This register contains the address that selects one of the
other internal registers. When writing to the ADM1031, the
first byte of data is always a register address, which is written
ADD Pin
GND
No Connect
V CC
A1
0
1
0
A0
0
0
1
to the address pointer register.
Status Registers
These registers provide status of each limit comparison.
Value and Limit Registers
Theses registers store the results of temperature and fan
speed measurements, along with their limit values.
Fan Speed Configuration Register
This register is used to program the PWM duty cycle for
each fan.
Offset Registers
These registers allow the temperature channel readings to
be offset by a 5-bit twos complement value written to these
registers. These values are automatically added to the
temperature values (or subtracted from if negative). This
allows the systems designer to optimize the system if
required, by adding or subtracting up to 15 ? C from a
temperature reading.
Fan Characteristics Registers
These registers are used to select the spin-up time, PWM
frequency, and speed range for the fans used.
THERM Limit Registers
These registers contain the temperature values at which
THERM is asserted.
T MIN /T RANGE Registers
These registers are read/write registers that hold the
minimum temperature value below which the fan does not
run when the device is in automatic fan speed control mode.
These registers also hold the temperature range value that
If ADD is left open-circuit, then the default address is
0101110. The facility to make hardwired changes at the
ADD pin allows the user to avoid conflicts with other
devices sharing the same serial bus; for example, if more
than one ADM1031 is used in a system.
Serial Bus Protocol
1. The master initiates data transfer by establishing a
START condition, defined as a high-to-low
transition on the serial data line SDA while the
serial clock line SCL remains high. This indicates
that an address/data stream follows. All slave
peripherals connected to the serial bus respond to
the START condition, and shift in the next eight
bits, consisting of a 7-bit address (MSB first) plus
an R/W bit that determines the direction of the
data transfer, that is, whether data is written to or
read from the slave device.
The peripheral whose address corresponds to the
transmitted address responds by pulling the data
line low during the low period before the ninth
clock pulse, known as the Acknowledge Bit. All
other devices on the bus now remain idle while the
selected device waits for data to be read from or
written to it. If the R/W bit is a 0, then the master
writes to the slave device. If the R/W bit is a 1,
then the master reads from the slave device.
2. Data is sent over the serial bus in sequences of
nine clock pulses, eight bits of data, followed by
an acknowledge bit from the slave device.
Transitions on the data line must occur during the
low period of the clock signal and remain stable
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| ADM1031ARQZ-R7 | 功能描述:IC SENSOR 2TEMP/FAN CTRL 16QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 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 |
| ADM1031ARQZ-REEL | 功能描述:板上安装温度传感器 2 CH TDM PWM FAN CTRL 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 |
| ADM1031ARQZ-REEL7 | 功能描述:IC SENSOR 2TEMP/FAN CTRL 16QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 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 |
| ADM1032 | 制造商:AD 制造商全称:Analog Devices 功能描述:+-1C Remote and Local System Temperature Monitor |
| ADM1032_12 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:1C Remote and Local System Temperature Monitor Supports SMBus Alert |
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