- 您现在的位置：买卖IC网 > PDF目录19411 > LM89-1CIMMX (National Semiconductor)IC TEMP SENSOR DGTL 8-MSOP PDF资料下载
参数资料
| 型号： | LM89-1CIMMX |
| 厂商： | National Semiconductor |
| 文件页数： | 24/32页 |
| 文件大小： | 0K |
| 描述： | IC TEMP SENSOR DGTL 8-MSOP |
| 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： | 0°C ~ 125°C |
| 精确度： | ±3°C（最小值） |
| 拓扑： | ADC（三角积分型），比较器，寄存器库 |
| 输出类型： | 2 线 SMBus? |
| 输出警报： | 是 |
| 输出风扇： | 是 |
| 电源电压： | 3 V ~ 3.6 V |
| 工作温度： | 0°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 剪切带 (CT) |
| 其它名称： | *LM89-1CIMMX LM89-1CIMMXCT |
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页当前第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
SNIS128C – AUGUST 2002 – REVISED MARCH 2013
as possible to the LM89's D+ and D ? pins. Make sure the traces to the 2.2nF capacitor are matched.
3.
4.
5.
6.
7.
8.
9.
Ideally, the LM89 should be placed within 10cm of the Processor diode pins with the traces being as straight,
short and identical as possible. Trace resistance of 1 Ω can cause as much as 1°C of error. This error can be
compensated by using the Remote Temperature Offset Registers, since the value placed in these registers
will automatically be subtracted from or added to the remote temperature reading.
Diode traces should be surrounded by a GND guard ring to either side, above and below if possible. This
GND guard should not be between the D+ and D ? lines. In the event that noise does couple to the diode
lines it would be ideal if it is coupled common mode. That is equally to the D+ and D ? lines.
Avoid routing diode traces in close proximity to power supply switching or filtering inductors.
Avoid running diode traces close to or parallel to high speed digital and bus lines. Diode traces should be
kept at least 2cm apart from the high speed digital traces.
If it is necessary to cross high speed digital traces, the diode traces and the high speed digital traces should
cross at a 90 degree angle.
The ideal place to connect the LM89's GND pin is as close as possible to the Processors GND associated
with the sense diode.
Leakage current between D+ and GND should be kept to a minimum. One nano-ampere of leakage can
cause as much as 1°C of error in the diode temperature reading. Keeping the printed circuit board as clean
as possible will minimize leakage current.
Noise coupling into the digital lines greater than 400mVp-p (typical hysteresis) and undershoot less than 500mV
below GND, may prevent successful SMBus communication with the LM89. SMBus no acknowledge is the most
common symptom, causing unnecessary traffic on the bus. Although the SMBus maximum frequency of
communication is rather low (100kHz max), care still needs to be taken to ensure proper termination within a
system with multiple parts on the bus and long printed circuit board traces. An RC lowpass filter with a 3db
corner frequency of about 40MHz is included on the LM89's SMBCLK input. Additional resistance can be added
in series with the SMBData and SMBCLK lines to further help filter noise and ringing. Minimize noise coupling by
keeping digital traces out of switching power supply areas as well as ensuring that digital lines containing high
speed data communications cross at right angles to the SMBData and SMBCLK lines.
24
Product Folder Links: LM89
Copyright ? 2002–2013, Texas Instruments Incorporated
相关PDF资料 |
PDF描述 |
|---|---|
| VE-B3M-EU-B1 | CONVERTER MOD DC/DC 10V 200W |
| VE-B63-EU-B1 | CONVERTER MOD DC/DC 24V 200W |
| GCM03DREN | CONN EDGECARD 6POS .156 EYELET |
| 2224-H-RC | INDUCTOR TORD HI AMP 1000UH HORZ |
| GBC22DRYN | CONN EDGECARD 44POS DIP .100 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM89-1CIMMX/NOPB | 功能描述:板上安装温度传感器 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 |
| LM89-1CIMX | 功能描述:板上安装温度传感器 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 |
| LM89-1CIMX/NOPB | 功能描述:板上安装温度传感器 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 |
| LM89-1DIMM/NOPB | 功能描述:SENSOR TEMPERATURE SMBUS 8VSSOP 制造商:texas instruments 系列:- 包装:* 零件状态:有效 传感器类型:数字，本地 检测温度 - 本地:0°C ~ 85°C 检测温度 - 远程:0°C ~ 85°C 输出类型:SMBus 电压 - 电源:3 V ~ 3.6 V 分辨率:7 b（本地），10 b（远程） 特性:单触发，输出开关，可编程极限，关断模式，待机模式 精度 - 最高（最低）:±3°C 测试条件:25°C ~ 125°C 工作温度:0°C ~ 125°C 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商器件封装:8-VSSOP 标准包装:1 |
| LM89-1DIMMX/NOPB | 功能描述:SENSOR TEMPERATURE SMBUS 8VSSOP 制造商:texas instruments 系列:- 包装:剪切带（CT） 零件状态:有效 传感器类型:* 检测温度 - 本地:0°C ~ 85°C 检测温度 - 远程:0°C ~ 85°C 输出类型:SMBus 电压 - 电源:3 V ~ 3.6 V 分辨率:7 b（本地），10 b（远程） 特性:单触发，输出开关，可编程极限，关断模式 精度 - 最高（最低）:±3°C 测试条件:25°C ~ 125°C 工作温度:0°C ~ 125°C 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商器件封装:8-VSSOP 标准包装:1 |
发布紧急采购，3分钟左右您将得到回复。