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參數(shù)資料
| 型號： | MAX6689EP9E |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 7-Channel Precision Temperature Monitor |
| 中文描述： | 7-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO20 |
| 封裝： | 0.150 INCH, 0.635 MM PITCH, MO-137AD, QSOP-20 |
| 文件頁數(shù)： | 16/19頁 |
| 文件大?。?/td> | 357K |
| 代理商： | MAX6689EP9E |
M
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 MAX6689 slave addresses.
Table 11. Slave Address
PC Board 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°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. 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
______________________________________________________________________________________
5–10 mils
5–10 mils
5–10 mils
MINIMUM
5–10 mils
GND
DXP
DXN
GND
Figure 5. Recommended DXP-DXN PC Board Traces. The two
outer guard traces are recommended if high-voltage traces will
be near the DXN and DXP traces.
MANUFACTURER
Central Semiconductor (USA)
Rohm Semiconductor (USA)
Samsung (Korea)
Siemens (Germany)
Zetex (England)
MODEL NO.
CMPT3904
SST3904
KST3904-TF
SMBT3904
FMMT3904CT-ND
Table 10. Remote-Sensors Transistor
Manufacturer
Note:
Discrete transistors must be diode connected (base
shorted to collector).
PART
SMBus SLAVE ID
0011 010
0011 100
1001 101
1001 111
0011 010
0011 100
1001 101
1001 111
PIN-PACKAGE
20 QSOP
20 QSOP
20 QSOP
20 QSOP
20 TSSOP
20 TSSOP
20 TSSOP
20 TSSOP
MAX6689EP34
MAX6689EP38
MAX6689EP9A
MAX6689EP9E
MAX6689UP34
MAX6689UP38
MAX6689UP9A
MAX6689UP9E
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相關代理商/技術參數(shù) |
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|---|---|
| MAX6689EP9E-T | 制造商:Maxim Integrated Products 功能描述:7-CHANNEL PRECISION TEMPERATURE MONITOR - Tape and Reel |
| MAX6689UP34 | 制造商:Maxim Integrated Products 功能描述:7-CHANNEL PRECISION TEMPERATURE MONITOR - Rail/Tube |
| MAX6689UP34+ | 功能描述:板上安裝溫度傳感器 7Ch Precision Temperature Monitor RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| MAX6689UP34+T | 功能描述:板上安裝溫度傳感器 7Ch Precision Temperature Monitor RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| MAX6689UP34-T | 制造商:Maxim Integrated Products 功能描述:7-CHANNEL PRECISION TEMPERATURE MONITOR - Tape and Reel |
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