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参数资料
| 型号： | MAX6689UP34+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 16/19页 |
| 文件大小： | 240K |
| 描述： | IC 7CH PREC TEMP MONITOR 20TSSOP |
| 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： | ±1°C 本地（最大），±3°C 远程（最大） |
| 拓扑： | ADC，缓冲器，寄存器库 |
| 输出类型： | I²C?/SMBus? |
| 输出警报： | 是 |
| 输出风扇： | 是 |
| 电源电压： | 3 V ~ 5.5 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 |
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 PCB layout as dis-
cussed in the PCB Layout section.
Slave Address
Table 11 shows the MAX6689 slave addresses.
PCB Layout
Follow these guidelines to reduce the measurement
error when measuring remote temperature:
1) Place the MAX6689 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-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. 5mil to 10mil traces
are typical. Be aware of the effect of trace resis-
tance 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
.
7-Channel Precision Temperature Monitor
16 ______________________________________________________________________________________
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 will be
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
Note: Discrete transistors must be diode connected (base
shorted to collector).
PART
SMBus SLAVE ID
PIN-PACKAGE
MAX6689EP34
0011 010
20 QSOP
MAX6689EP38
0011 100
20 QSOP
MAX6689EP9A
1001 101
20 QSOP
MAX6689EP9E
1001 111
20 QSOP
MAX6689UP34
0011 010
20 TSSOP
MAX6689UP38
0011 100
20 TSSOP
MAX6689UP9A
1001 101
20 TSSOP
MAX6689UP9E
1001 111
20 TSSOP
Table 11. Slave Address
相关PDF资料 |
PDF描述 |
|---|---|
| MAX6690MEE+ | IC TEMP SENSOR SMBUS 16-QSOP |
| MAX6692YMSA+ | IC SENSOR REMOTE SMBUS 8SOIC |
| MAX6693UP9A+T | IC TEMP MONITOR 7CH 20-TSSOP |
| MAX6694TE9A+T | IC TEMP MONITOR 5CH 16TQFN |
| MAX6695YAUB+ | IC SENSOR TEMP SMBUS 10-UMAX |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6689UP34+ | 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 |
| MAX6689UP34+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 |
| MAX6689UP34-T | 制造商:Maxim Integrated Products 功能描述:7-CHANNEL PRECISION TEMPERATURE MONITOR - Tape and Reel |
| MAX6689UP38 | 制造商:Maxim Integrated Products 功能描述:7-CHANNEL PRECISION TEMPERATURE MONITOR - Rail/Tube |
| MAX6689UP38-T | 制造商:Maxim Integrated Products 功能描述:7-CHANNEL PRECISION TEMPERATURE MONITOR - Tape and Reel |
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