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| 型号： | NE1617ADS,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 15/30页 |
| 文件大小： | 305K |
| 描述： | IC TEMP MONITOR 16-SSOP |
| 特色产品： | NXP - I2C Interface |
| 标准包装： | 1 |
| 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： | -55°C ~ 125°C，外部传感器 |
| 精确度： | ±3°C 本地（最大），±5°C 远程（最大） |
| 拓扑： | ADC，多路复用器，寄存器库 |
| 输出类型： | SMBus? |
| 输出警报： | 是 |
| 输出风扇： | 无 |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -55°C ~ 125°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-SSOP |
| 包装： | 标准包装 |
| 产品目录页面： | 846 (CN2011-ZH PDF) |
| 其它名称： | 568-4512-6 |
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NE1617A
All information provided in this document is subject to legal disclaimers.
?NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 5 20 March 2012
15 of 30
NXP Semiconductors
NE1617A
Temperature monitor for microprocessor systems
9.1.3 Layout considerations
Digital boards can be electrically noisy environments, and the NE1617A is measuring very
small voltages from the remote sensor, so care must be taken to minimize noise induced
at the sensor inputs. The following precautions should be taken.
1. Place the NE1617A as close as possible to the remote sensing diode. Provided that
the worst noise sources, that is, clock generators, data/address buses, and CRTs, are
avoided, this distance can be four to eight inches.
2. Route the D+ and D- tracks close together, in parallel, with grounded guard tracks on
each side. Provide a ground plane under the tracks if possible.
3. Use wide tracks to minimize inductance and reduce noise pickup. 10 mil track
minimum width and spacing is recommended (see Figure 4
).
4. Try to minimize the number of copper/solder joints, which can cause thermocouple
effects. Where copper/solder joints are used, make sure that they are in both the D+
and D- path and at the same temperature.
Thermocouple effects should not be a major problem since 1 癈 corresponds to about
200 mV and thermocouple voltages are about 3 mV/癈 of temperature difference.
Unless there are two thermocouples with a big temperature differential between them,
thermocouple voltages should be much less than 200 mV.
5. Place a 0.1 mF bypass capacitor close to the V
DD
pin. In very noisy environments,
place a 1000 pF input filter capacitor across D+ and D- close to the NE1617A.
6. If the distance to the remote sensor is more than eight inches, the use of twisted pair
cable is recommended. This works up to about six feet 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 NE1617A. Leave the remote end of the shield
unconnected to avoid ground loops.
Because the measurement technique uses switched current sources, excessive cable
and/or filter capacitance can affect the measurement. When using long cables, the filter
capacitor can be reduced or removed.
Cable resistance can also introduce errors. 1 W resistance introduces about 1 癈 error.
Fig 4. Typical arrangement of signal tracks
002aag953
GND
GND
D+
D
10 mil
10 mil
10 mil
10 mil
10 mil
10 mil
10 mil
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NE1617DS | 功能描述:板上安装温度传感器 I2C LOC +/- 2OC AND REM +/- 3OC TS 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 |
| NE1617DS,112 | 功能描述:板上安装温度传感器 I2C LOC +/- 2OC AND 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 |
| NE1617DS,118 | 功能描述:板上安装温度传感器 I2C LOC +/- 2OC AND REM +/- 3OC TS 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 |
| NE1618 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Temperature monitor for microprocessor systems |
| NE1618DS | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Temperature monitor for microprocessor systems |
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