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LM95231 Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LM95231
Description  Precision Dual Remote Diode Temperature Sensor with SMBus Interface and TruTherm Technology
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM95231 Datasheet(HTML) 3 Page - National Semiconductor (TI)

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Pin Descriptions (Continued)
Label
Pin #
Function
Typical Connection
D1−
2
Diode Return Current Sink
To Diode Cathode. A capacitor is not required
between D1+ and D1-. A 100 pF capacitor between
D1+ and D1− can be added and may improve
performance in noisy systems.
D2+
3
Diode Current Source
To Diode Anode. Connected to remote discrete
diode-connected transistor junction or to the
diode-connected transistor junction on a remote IC
whose die temperature is being sensed. A capacitor
is not required between D2+ and D2-. A 100 pF
capacitor between D2+ and D2− can be added and
may improve performance in noisy systems.
D2−
4
Diode Return Current Sink
To Diode Cathode. A capacitor is not required
between D2+ and D2-. A 100 pF capacitor between
D2+ and D2− can be added and may improve
performance in noisy systems.
GND
5
Power Supply Ground
System low noise ground
V
DD
6
Positive Supply Voltage
Input
DC Voltage from 3.0 V to 3.6 V. V
DD should be
bypassed with a 0.1 µF capacitor in parallel with
100 pF. The 100 pF capacitor should be placed as
close as possible to the power supply pin. Noise
should be kept below 200 mVp-p, a 10 µF capacitor
may be required to achieve this.
SMBDAT
7
SMBus Bi-Directional Data
Line, Open-Drain Output
From and to Controller; may require an external
pull-up resistor
SMBCLK
8
SMBus Clock Input
From Controller; may require an external pull-up
resistor
Simplified Block Diagram
20120201
www.national.com
3


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