參數(shù)資料
型號: MAX6694TE9A+T
廠商: Maxim Integrated
文件頁數(shù): 17/18頁
文件大?。?/td> 196K
描述: IC TEMP MONITOR 5CH 16TQFN
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 2,500
功能: 溫度監(jiān)控系統(tǒng)(傳感器)
傳感器類型: 內(nèi)部和外部
感應(yīng)溫度: -40°C ~ 125°C,外部傳感器
精確度: ±3°C 本地(最大),±4°C 遠程(最大)
拓撲: ADC,緩沖器,多路復(fù)用器,寄存器庫
輸出類型: SMBus?
輸出警報:
輸出風扇:
電源電壓: 3 V ~ 3.6 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 16-WQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 16-TQFN-EP(5x5)
包裝: 帶卷 (TR)
5-Channel Precision Temperature Monitor
with Beta Compensation
______________________________________________________________________________________   17
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 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
.
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 cables
parasitic capacitance often provides noise filtering, so
the 100pF 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 +0.5癈.
5 mils TO 10 mils
5 mils TO 10 mils
5 mils TO 10 mils
MINIMUM
5 mils TO 10 mils
GND
DXP
DXN
GND
Figure 5. Recommended DXP-DXN PCB Traces. The two outer
guard traces are recommended if high-voltage traces are near
the DXN and DXP traces.
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