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SA56004GD Datasheet(PDF) 33 Page - NXP Semiconductors

Part # SA56004GD
Description  짹1 째C accurate, SMBus-compatible, 8-pin, remote/local digital temperature sensor with overtemperature alarms
PDF  36 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

SA56004GD Datasheet(HTML) 33 Page - NXP Semiconductors

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SA56004X_5
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 05 — 22 May 2008
33 of 36
NXP Semiconductors
SA56004X
Digital temperature sensor with overtemperature alarms
2. Route the D+ and D
− lines parallel and close together with ground guards enclosing
them (see Figure 25).
3. Leakage currents due to printed-circuit board contamination must be considered.
Error can be introduced by these leakage currents.
4. Use wide traces to reduce inductance and noise pick-up. Narrow traces more readily
pick up noise. The minimum width of 10 mil and space of 10 mil are recommended.
5. Place a bypass capacitor of 10 nF close to the VDD pin and an input filter capacitor of
2200 pF close to the D+ and D
− pins.
6. A shielded twisted pair is recommended if remote sensor is located several feet away
from the temperature sensor. Under this circumstance, connect the shield of the cable
at the device side to the SA56004X GND pin and leave the shield at the remote end
unconnected to avoid ground loop currents. Also notice that the series resistance of
the cable may introduce measurement error; 1
Ω can introduce about 0.5 °C.
16. Abbreviations
Fig 25. D+ and D
− trace layout
002aad227
GND
GND
D+
D
−
Table 22.
Abbreviations
Acronym
Description
A/D
Analog-to-Digital
ARA
Alert Response Address
ASIC
Application Specific Integrated Circuit
CRT
Cathode Ray Tube
ESD
ElectroStatic Discharge
HBM
Human Body Model
HVAC
Heating, Ventilating and Air Conditioning
I2C-bus
Inter-Integrated Circuit bus
LSB
Least Significant Bit
MM
Machine Model
MSB
Most Significant Bit
OTP
One-Time Programmable
POR
Power-On Reset
PTAT
Proportional To Absolute Temperature
SMBus
System Management Bus
UVL
Under Voltage Lockout



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