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| 型号： | MAX6693UP9A+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 17/19页 |
| 文件大小： | 168K |
| 描述： | IC TEMP MONITOR 7CH 20-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 74 |
| 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： | ±3°C 本地（最大），±4°C 远程（最大） |
| 拓扑： | ADC，缓冲器，多路复用器，寄存器库 |
| 输出类型： | SMBus? |
| 输出警报： | 是 |
| 输出风扇： | 是 |
| 电源电压： | 3 V ~ 3.6 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 管件 |
7-Channel Precision Temperature Monitor
with Beta Compensation
______________________________________________________________________________________ 17
effect; the measured temperature of the junction tracks
the actual temperature within a conversion cycle.
When measuring temperature with discrete remote tran-
sistors, the best thermal response times are obtained
with transistors in small packages (i.e., SOT23 or SC70).
Take care to account for thermal gradients between the
heat source and the sensor, and ensure that stray air
currents across the sensor package do not interfere with
measurement accuracy. Self-heating does not signifi-
cantly affect measurement accuracy. Remote-sensor
self-heating due to the diode current source is negligible.
ADC Noise Filtering
The integrating ADC has good noise rejection for low-
frequency signals, such as power-supply hum. In environ-
ments with significant high-frequency EMI, connect an
external 100pF capacitor between DXP_ and DXN_.
Larger capacitor values can be used for added filtering,
but do not exceed 100pF because it can introduce errors
due to the rise time of the switched current source. High-
frequency noise reduction is needed for high-accuracy
remote measurements. Noise can be reduced with careful
PCB layout as discussed in the PCB Layout section.
Slave Address
The slave address for the MAX6693 is shown in Table 11.
PCB Layout
Follow these guidelines to reduce the measurement
error when measuring remote temperature:
1) Place the MAX6693 as close as is practical to the
remote diode. In noisy environments, such as a com-
puter motherboard, this distance can be 4in to 8in
(typ). This length can be increased if the worst noise
sources are avoided. Noise sources include CRTs,
clock generators, memory buses, and PCI buses.
2) Do not route the DXP-DXN lines next to the deflec-
tion coils of a CRT. Also, do not route the traces
across fast digital signals, which can easily intro-
duce +30癈 error, even with good filtering.
3) Route the DXP and DXN traces in parallel and in close
proximity to each other. Each parallel pair of traces
should go to a remote diode. Route these traces away
from any higher voltage traces, such as +12VDC.
Leakage currents from PCB contamination must be
dealt with carefully since a 20M?leakage path from
DXP to ground causes about +1癈 error. If high-volt-
age traces are unavoidable, connect guard traces to
GND on either side of the DXP-DXN traces (Figure 5).
4) Route through as few vias and crossunders as possi-
ble to minimize copper/solder thermocouple effects.
5) Use wide traces when practical. 5mil to 10mil traces
are typical. Be aware of the effect of trace resistance on
temperature readings when using long, narrow traces.
6) When the power supply is noisy, add a resistor (up
to 47? in series with V
CC
.
510 mils
510 mils
510 mils
MINIMUM
510 mils
GND
DXP
DXN
GND
Figure 5. Recommended DXP-DXN PCB Traces. The two outer
guard traces are recommended if high-voltage traces near the
DXN and DXP traces.
MANUFACTURER
MODEL NO.
Central Semiconductor (USA)
CMPT3904
Rohm Semiconductor (USA)
SST3904
Samsung (Korea)
KST3904-TF
Siemens (Germany)
SMBT3904
Zetex (England)
FMMT3904CT-ND
Table 10. Remote-Sensors Transistor
Manufacturer (for Channels 26)
Note: Discrete transistors must be diode connected (base
shorted to collector).
DEVICE ADDRESS
A7
A6
A5
A4
A3
A2
A1
A0
1
0
0
1
1
0
1
R/W
Table 11. Slave Address
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6693UP9A+ | 功能描述:板上安装温度传感器 7Ch Precision Temperature Monitor 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 |
| MAX6693UP9A+T | 功能描述:板上安装温度传感器 7Ch Precision Temperature Monitor 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 |
| MAX6694TE9A+ | 功能描述:板上安装温度传感器 5Ch Precision Temperature Monitor 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 |
| MAX6694TE9A+T | 功能描述:板上安装温度传感器 5Ch Precision Temperature Monitor 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 |
| MAX6694UE9A+ | 功能描述:板上安装温度传感器 5Ch Precision Temperature Monitor 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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