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参数资料
| 型号： | MAX6699EE99+ |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 温度/湿度传感器 |
| 英文描述： | 5-Channel Precision Temperature Monitor |
| 中文描述： | DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 1Cel, RECTANGULAR, SURFACE MOUNT |
| 封装： | 0.150 INCH, 0.025 INCH PITCH, LEAD FREE, MO-137AB, QSOP-16 |
| 文件页数： | 8/22页 |
| 文件大小： | 347K |
| 代理商： | MAX6699EE99+ |
MAX6699
ADC Noise Filtering
The integrating ADC has good noise rejection for low-
frequency signals, such as power-supply hum. In envi-
ronments with significant high-frequency EMI, connect
an external 2200pF capacitor between DXP_ and
DXN_. Larger capacitor values can be used for added
filtering, but do not exceed 3300pF 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 PC board layout as
discussed in the PC Board Layout section.
Slave Address
Table 11 shows the MAX6699 slave address.
PC Board Layout
Follow these guidelines to reduce the measurement
error when measuring remote temperature:
1) Place the MAX6699 as close as is practical to the
remote diode. In noisy environments, such as a
computer 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°C 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 PC board contami-
nation must be dealt with carefully since a 20M
leakage path from DXP to ground causes about
+1°C error. If high-voltage 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 pos-
sible to minimize copper/solder thermocouple
effects.
5) Use wide traces when practical.
6) When the power supply is noisy, add a resistor (up
to 47) in series with VCC.
Twisted-Pair and Shielded Cables
Use a twisted-pair cable to connect the remote sensor
for remote-sensor distances longer than 8in or in very
noisy environments. Twisted-pair cable lengths can be
between 6ft and 12ft before noise introduces excessive
errors. For longer distances, the best solution is a
shielded twisted pair like that used for audio micro-
phones. For example, Belden #8451 works well for dis-
tances up to 100ft in a noisy environment. At the
device, connect the twisted pair to DXP and DXN and
the shield to GND. Leave the shield unconnected at the
5-Channel Precision Temperature Monitor
16
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5 mils
MINIMUM
5 mils
GND
DXP
DXN
GND
Figure 5. Recommended Minimum DXP-DXN PC Board 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
Manufacturers
Note: Discrete transistors must be diode connected (base
shorted to collector).
PART
SMBus SLAVE ID
PIN-PACKAGE
MAX6699EE34
0011 010
16 QSOP
MAX6699EE38
0011 100
16 QSOP
MAX6699EE99
1001 100
16 QSOP
MAX6699EE9C
1001 110
16 QSOP
MAX6699UE34
0011 010
16 TSSOP
MAX6699UE38
0011 100
16 TSSOP
MAX6699UE99
1001 100
16 TSSOP
MAX6699UE9C
1001 110
16 TSSOP
Table 11. Slave Address
相关PDF资料 |
PDF描述 |
|---|---|
| MAX6699EE99+T | 5-Channel Precision Temperature Monitor |
| MAX6699UE34+ | 5-Channel Precision Temperature Monitor |
| MAX6699UE38+ | 5-Channel Precision Temperature Monitor |
| MAX6699UE38+T | 5-Channel Precision Temperature Monitor |
| MAX6701ALKA+ | Low-Voltage, SOT23, µP Supervisors with Power-Fail In/Out, Manual Reset, and Watchdog Timer |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6699EE99+ | 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 |
| MAX6699EE99+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 |
| MAX6699EE99-T | 制造商:Maxim Integrated Products 功能描述:5-CHANNEL PRECISION TEMPERATURE MONITOR - Tape and Reel |
| MAX6699EE9C | 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 |
| MAX6699EE9C+ | 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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