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SNIS143E – AUGUST 2006 – REVISED MARCH 2013
DESCRIPTION (CONTINUED)
The LM95241 resolution format for remote temperature readings can be programmed to be 11-bits signed or
unsigned with the digital filtering disabled. When the filtering is enabled the resolution increases to 13-bits signed
or unsigned. In the unsigned mode the LM95241 remote diode readings can resolve temperatures above 127°C.
Local temperature readings have a resolution of 9-bits plus sign.
Connection Diagram
D1+
D1-
1
2
8
7
SMBCLK
SMBDAT
D2+
D2-
3
4
LM95241
6
5
V DD
GND
Figure 1. VSSOP-8
TOP VIEW
PIN DESCRIPTIONS
Label
D1+
Pin #
1
Function
Diode Current Source
Typical Connection
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 D1+ and
D1-. A 100 pF capacitor between D1+ and D1 ? can be added
and may improve performance in noisy systems.
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
V DD
5
6
Power Supply Ground
Positive Supply Voltage Input
System low noise ground
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, From and to Controller; may require an external pull-up resistor
Open-Drain Output
SMBCLK
8
SMBus Clock Input
From Controller; may require an external pull-up resistor
2
Product Folder Links: LM95241
Copyright ? 2006–2013, Texas Instruments Incorporated
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