- 您现在的位置：买卖IC网 > Datasheet目录39 > ADM1027ARQZ-RL7 (ON Semiconductor)IC REMOTE THERMAL CTLR 24QSOP Datasheet资料下载
参数资料
| 型号： | ADM1027ARQZ-RL7 |
| 厂商： | ON Semiconductor |
| 文件页数： | 6/56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) |
第1页第2页第3页第4页第5页当前第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页
REV. A
6
ADM1027
FUNCTIONAL DESCRIPTION
General Description
The ADM1027 is a complete systems monitor and multiple fan
controller for any system requiring monitoring and cooling. The
device communicates with the system via a serial system
management bus. The serial bus controller has an optional
address line for device selection (Pin 14), a serial data line
for reading and writing addresses and data (Pin 1), and an input
line for the serial clock (Pin 2). All control and programming
functions of the ADM1027 are performed over the serial bus. In
addition, one of the pins can be reconfigured as an SMBALERT
output to indicate out-of-limit conditions.
Measurement Inputs
The device has six measurement inputs, four for voltage and
two for temperature. It can also measure its own supply voltage
and can measure ambient temperature with its on-chip tempera-
ture sensor.
Pins 20 to 23 are analog inputs with on-chip attenuators,
configured to monitor 5 V, 12 V, 2.5 V, and the processor core
voltage (2.25 V input), respectively.
Power is supplied to the chip via Pin 4, which the system also
uses to monitor V
CC
. In PCs, this pin is normally connected to a
3.3 V standby supply. This pin can, however, be connected to a
5 V supply and monitor it without overranging.
Remote temperature sensing is provided by the D1+/ and
D2+/ inputs, to which diode-connected, external temperature-
sensing transistors such as a 2N3906 or CPU thermal diode
may be connected.
The ADC also accepts input from an on-chip band gap tem-
perature sensor that monitors system ambient temperature.
Sequential Measurement
When the ADM1027 monitoring sequence is started, it cycles
sequentially through the measurement of analog inputs and the
temperature sensors. Measured values from these inputs are
stored in value registers. These can be read out over the serial
bus, or can be compared with programmed limits stored in the
limit registers. The results of out-of-limit comparisons are stored
in the status registers, which can be read over the serial bus to
flag out-of-limit conditions.
Processor Voltage ID
Five digital inputs (VID0 to VID4 Pins 5 to 8 and 19) read
the processor Voltage ID code and store it in the VID register,
from which it can be read out by the management system over
the serial bus. The VID code monitoring function is compatible
with both VRM9.x and future VRM10 solutions. The VID code
monitoring function is compatible with VRM9.x.
ADM1027 Address Selection
Pin 13 is the dual function PWM3/ADDRESS ENABLE pin.
If Pin 13 is pulled low on power-up, the ADM1027 will read the
state of Pin 14 (TACH4/ADDRESS SELECT pin) to determine
the ADM1027 slave address. If Pin 13 is high on power-up, then
the ADM1027 will default to SMBus slave address 0x5C. This
function is described later in more detail.
Internal Registers of the ADM1027
A brief description of the ADM1027s principal internal regis-
ters follows. More detailed information on the function of each
register is given in Tables IV to XXXVI.
Configuration Registers
Provide control and configuration of the ADM1027, including
alternate pinout functionality.
Address Pointer Register
Contains the address that selects one of the other internal registers.
When writing to the ADM1027, the first byte of data is always a
register address, which is written to the Address Pointer Register.
Status Registers
Provide the status of each limit comparison and are used to
signal out-of-limit conditions on the temperature, voltage, or
fan speed channels. If Pin 10 is configured as SMBALERT,
then this pin will assert low whenever a status bit gets set.
Interrupt Mask Registers
Allow each interrupt status event to be masked when Pin 10 is
configured as an SMBALERT output. This affects only the
SMBALERT output and not the bits in the status register.
VID Register
The status of the VID0 to VID4 pins of the processor can be
read from this register.
Value and Limit Registers
The results of analog voltage inputs, temperature, and fan speed
measurements are stored in these registers, along with their limit
values.
Offset Registers
Allow each temperature channel reading to be offset by a twos
complement value written to these registers.
T
MIN
Registers
Program the starting temperature for each fan under automatic
fan speed control.
T
RANGE
Registers
Program the temperature-to-fan speed control slope in automatic
Fan Speed Control Mode for each PWM output.
Enhance Acoustics Registers
Allow each PWM output controlling fan to be tweaked to enhance
the systems acoustics.
Rev. 3 | Page 6 of 56 | www.onsemi.com
相关PDF资料 |
PDF描述 |
|---|---|
| ADM1029ARQZ-R7 | IC SENSOR 2TEMP/FAN CTRL 24QSOP |
| ADM1030ARQZ-RL7 | IC SNSR TEMP/FAN PWM CTRL 16QSOP |
| ADM1032ARZ-REEL | IC TEMP MONITOR 85DEG 8SOIC |
| ADM1033ARQZ-RL7 | IC THERM/FAN SPEED CTLR 16-QSOP |
| ADM1034ARQZ-REEL | IC THERM/FAN SPEED CTRLR 16-QSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADM1027ARQZ-RL71 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:dBCOOLa?￠ Remote Thermal Controller and Voltage Monitor |
| ADM1028 | 制造商:AD 制造商全称:Analog Devices 功能描述:Remote Thermal Diode Monitor with Linear Fan Control |
| ADM1028ARQ | 功能描述:IC SENSOR TEMP/FAN CTRL 16QSOP RoHS:否 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 |
| ADM1028ARQ-REEL7 | 制造商:Rochester Electronics LLC 功能描述:TDM + LINEAR FAN CONTROL I.C. - Tape and Reel |
| ADM1029 | 制造商:AD 制造商全称:Analog Devices 功能描述:Dual PWM Fan Controller and Temperature Monitor for High Availability Systems |
发布紧急采购，3分钟左右您将得到回复。