- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385542 > MAX6697 (Maxim Integrated Products, Inc.) 7-Channel Precision Temperature Monitor PDF資料下載
參數(shù)資料
| 型號(hào)： | MAX6697 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 7-Channel Precision Temperature Monitor |
| 中文描述： | 7通道、高精度溫度監(jiān)測(cè)器 |
| 文件頁數(shù)： | 16/19頁 |
| 文件大?。?/td> | 252K |
| 代理商： | MAX6697 |
M
Slave Address
Table 11 shows the MAX6697 slave addresses.
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.
PC Board Layout
Follow these guidelines to reduce the measurement
error when measuring remote temperature:
1) Place the MAX6697 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 V
CC
.
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
remote sensor. For very long cable runs, the cable
’
s
parasitic capacitance often provides noise filtering, so
the 2200pF capacitor can often be removed or reduced
in value. Cable resistance also affects remote-sensor
accuracy. For every 1
of series resistance the error is
approximately +1/2
°
C.
7-Channel Precision Temperature Monitor
16
______________________________________________________________________________________
10 mils
10 mils
10 mils
MINIMUM
10 mils
GND
DXP
DXN
GND
Figure 5. Recommended DXP-DXN PC Board 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 100
1001 110
0011 010
0011 100
1001 100
1001 110
PIN-PACKAGE
20 QSOP
20 QSOP
20 QSOP
20 QSOP
20 TSSOP
20 TSSOP
20 TSSOP
20 TSSOP
MAX6697EP34
MAX6697EP38
MAX6697EP99
MAX6697EP9C
MAX6697UP34
MAX6697UP38
MAX6697UP99
MAX6697UP9C
Table 11. Slave Address
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX6697EP | 7-Channel Precision Temperature Monitor |
| MAX6699 | 5-Channel Precision Temperature Monitor |
| MAX6699EE | 5-Channel Precision Temperature Monitor |
| MAX6699UE | 5-Channel Precision Temperature Monitor |
| MAX6701-08_03 | Low-Voltage, SOT23 レP Supervisors with Power- Fail In/Out, Manual Reset, and Watchdog Timer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6697AEP | 制造商:Maxim Integrated Products 功能描述:7-CHANNEL PRECISION TEMPERATURE MONITOR - Rail/Tube |
| MAX6697AEP-T | 制造商:Maxim Integrated Products 功能描述:7-CHANNEL PRECISION TEMPERATURE MONITOR - Tape and Reel |
| MAX6697AUP | 制造商:Maxim Integrated Products 功能描述:7-CHANNEL PRECISION TEMPERATURE MONITOR - Rail/Tube |
| MAX6697AUP-T | 制造商:Maxim Integrated Products 功能描述:7-CHANNEL PRECISION TEMPERATURE MONITOR - Tape and Reel |
| MAX6697EP | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)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(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。