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参数资料
| 型号： | ADM1021A |
| 厂商： | Analog Devices, Inc. |
| 英文描述： | Low-Cost Microprocessor System Temperature Monitor |
| 中文描述： | 低成本的微处理器系统温度监控 |
| 文件页数： | 12/12页 |
| 文件大小： | 163K |
| 代理商： | ADM1021A |
–12–
C
P
ADM1021A
REV. A
5. Place a 0.1
μ
F bypass capacitor close to the V
DD
pin and
2200 pF input filter capacitors across D+, D– close to the
ADM1021A.
6. If the distance to the remote sensor is more than eight inches,
the use of twisted pair cable is recommended. This will work
up to about 6 to 12 feet.
7. For really long distances (up to 100 feet), use shielded twisted
pair such as Belden #8451 microphone cable. Connect the
twisted pair to D+ and D– and the shield to GND close to
the ADM1021A. Leave the remote end of the shield uncon-
nected to avoid ground loops.
Because the measurement technique uses switched current sources,
excessive cable and/or filter capacitance can affect the measure-
ment. When using long cables, the filter capacitor may be
reduced or removed.
Cable resistance can also introduce errors. 1
series resistance
introduces about 1
°
C error.
APPLICATION CIRCUITS
Figure 18 shows a typical application circuit for the ADM1021A,
using a discrete sensor transistor connected via a shielded, twisted
pair cable. The pull-ups on SCLK, SDATA and
ALERT
are
required only if they are not already provided elsewhere in the
system.
The SCLK, and SDATA pins of the ADM1021A can be inter-
faced directly to the SMBus of an I/O chip. Figure 19 shows
how the ADM1021A might be integrated into a system using
this type of I/O controller.
V
DD
STBY
SCLK
SDATA
ALERT
ADD0
ADD1
GND
D+
D
–
0.1 F
ALL 10k
3.3V
TO CONTROL
CHIP
SET TO REQUIRED
ADDRESS
IN
OUT
I/O
C1*
SHIELD
2N3904
*C1 IS OPTIONAL
ADM1021A
Figure 18. Typical ADM1021A Application Circuit
USB USB
PROCESSOR
DISPLAY
SYSTEM BUS
DISPLAY
CACHE
ICH
I/O CONTROLLER
HUB
SYSTEM
MEMORY
GMCH
FWH
(FIRMWARE HUB)
ADM1021A
SDATA
D+
D
–
ALERT
SCLK
SUPER
I/O
SMBUS
PCI BUS
PCI SLOTS
2 USB PORTS
CD ROM
HARD
DISK
2 IDE PORTS
Figure 19. Typical System Using ADM1021A
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
16-Lead Shrink Small Outline Package
(RQ-16)
16
9
8
1
0.197 (5.00)
0.189 (4.80)
0.244 (6.20)
0.228 (5.79)
PIN 1
0.157 (3.99)
0.150 (3.81)
SEATING
PLANE
0.010 (0.25)
0.004 (0.10)
0.012 (0.30)
0.008 (0.20)
0.025
(0.64)
BSC
0.059 (1.50)
MAX
0.069 (1.75)
0.053 (1.35)
0.010 (0.20)
0.007 (0.18)
0.050 (1.27)
0.016 (0.41)
8
0
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相关代理商/技术参数 |
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| ADM1021AARQ | 功能描述:IC SENSOR TEMP DUAL3/5.5V 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 |
| ADM1021AARQ-REEL | 功能描述:IC SENSOR TEMP DUAL3/5.5V 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 |
| ADM1021AARQ-REEL7 | 功能描述:IC SENSOR TEMP DUAL3/5.5V 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 |
| ADM1021AARQZ | 功能描述:板上安装温度传感器 PIN COMP TO ADM1021 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 |
| ADM1021AARQZ-R | 功能描述:板上安装温度传感器 PIN COMP TO ADM1021 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 |
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