- 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： | 11/56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页第6页第7页第8页第9页第10页当前第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
ADM1027
11
5. Once the ADM1027 has responded to the alert response
address, the master must read the status registers and the
SMBALERT will only be cleared if the error condition has
gone away.
SMBus Timeout
The ADM1027 includes an SMBus timeout feature. If there is
no SMBus activity for a minimum of 15 ms and a maximum of
35 ms, the ADM1027 assumes that the bus is locked and releases
the bus. This prevents the device from locking or holding the
SMBus expecting data. Some SMBus controllers cannot handle
the SMBus timeout feature, so it can be disabled.
CONFIGURATION REGISTER 1 Register 0x40
<6> TODIS = 0; SMBus timeout enabled (default)
<6> TODIS = 1; SMBus timeout disabled
VOLTAGE MEASUREMENT INPUTS
The ADM1027 has four external voltage measurement channels.
It can also measure its own supply voltage, V
CC
.
Pins 20 to 23 are dedicated to measuring 5 V, 12 V, 2.5 V supplies
and the processor core voltage V
CCP
(0 V to 3 V input). The
V
CC
supply voltage measurement is carried out through the V
CC
pin (Pin 4). Setting Bit 7 of Configuration Register 1 (Reg. 0x40)
allows a 5 V supply to power the ADM1027 and be measured
without overranging the V
CC
measurement channel. The 2.5 V
input can be used to monitor a chipset supply voltage in com-
puter systems.
ANALOG-TO-DIGITAL CONVERTER
All analog inputs are multiplexed into the on-chip, successive
approximation, analog-to-digital converter. This has a resolu-
tion of 10 bits. The basic input range is 0 V to 2.25 V, but the
inputs have built-in attenuators to allow measurement of 2.5 V,
3.3 V, 5 V, 12 V and the processor core voltage V
CCP
, without
any external components. To allow for the tolerance of these
supply voltages, the ADC produces an output of 3/4 full scale
(768 decimal or 300 hex) for the nominal input voltage, and so
has adequate headroom to cope with overvoltages.
INPUT CIRCUITRY
The internal structure for the analog inputs is shown in Figure 12.
Each input circuit consists of an input protection diode, an
attenuator, and a capacitor to form a first order low-pass filter
that gives the input immunity to high frequency noise.
VOLTAGE MEASUREMENT REGISTERS
Reg. 0x20 2.5 V Reading = 0x00 default
Reg. 0x21 V
CCP
Reading = 0x00 default
Reg. 0x22 V
CC
Reading = 0x00 default
Reg. 0x23 5 V Reading = 0x00 default
Reg. 0x24 12 V Reading = 0x00 default
VOLTAGE MEASUREMENT LIMIT REGISTERS
Associated with each voltage 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. 0x44 2.5 V Low Limit = 0x00 default
Reg. 0x45 2.5 V High Limit = 0xFF default
Reg. 0x46 V
CCP
Low Limit = 0x00 default
Reg. 0x47 V
CCP
High Limit = 0xFF default
Reg. 0x48 V
CC
Low Limit = 0x00 default
Reg. 0x49 V
CC
High Limit = 0xFF default
Reg. 0x4A 5 V Low Limit = 0x00 default
Reg. 0x4B 5 V High Limit = 0xFF default
Reg. 0x4C 12 V Low Limit = 0x00 default
Reg. 0x4D 12 V High Limit = 0xFF default
30pF
120k
30pF
93k
MUX
30pF
68k
30pF
45k
105k
35pF
35k
94k
71k
47k
20k
12V
IN
5V
IN
3.3V
IN
2.5V
IN
V
CCPIN
Figure 12. Structure of Analog Inputs
Table II shows the input ranges of the analog inputs and output
codes of the 10-bit A/D converter.
When the ADC is running, it samples and converts a voltage
input in 711 ms, and averages 16 conversions to reduce noise.
Therefore a measurement on any input takes nominally 11.38 ms.
Rev. 3 | Page 11 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。