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LM95010
www.ti.com
SNIS133D – SEPTEMBER 2003 – REVISED MARCH 2013
LM95010 Digital Temperature Sensor with SensorPath™ Bus
Check for Samples: LM95010
FEATURES
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•23 SensorPath Bus – 4 Hardware Programmable Addresses
• Temperature Sensing – 0.25 °C Resolution – 127.75 °C Maximum Temperature Reading
• 8-Lead VSSOP Package
APPLICATIONS
• Microprocessor Based Equipment – (Motherboards, Base-stations, Routers, ATMs, Point of Sale, …)
• Power Supplies
KEY SPECIFICATIONS
• Temperature Sensor Accuracy ±2°C (max) • Temperature Range −20 to +125°C • Power Supply Voltage +3.0 to +3.6 V
• Power Supply Current 0.5 mA (typ)
• Conversion Time 14 to 1456 ms
DESCRIPTION
The LM95010 is a digital output temperature sensor that has single-wire interface compatible with the SensorPath interface. It uses a ΔVbe analog temperature sensing technique that generates a differential voltage that is proportional to temperature. This voltage is digitized using a Sigma-Delta analogto-digital converter. The LM95010 is part of a hardware monitor system, comprised of two parts: the PC System Health Controller (Master), such as a Super I/O, and up to seven slaves of which four can be LM95010s. Using SensorPath, the LM95010 will be controlled by the master and report to the master its own die temperature. SensorPath data is pulse width encoded, thereby allowing the LM95010 to be easily connected to many general purpose microcontrollers.
Block Diagram
LM95010
ADDRESS POINTER REGISTER
+3.3V_SBY GND
V+ (Power)
MANUFACTURER ID REGISTER
REVISION AND DEVICE ID REGISTER
CAPABILITIES FIXED REGISTER
TEMPERATURE CAPABILITIES REGISTER
THERMAL DIODE SIGNAL
CONDITIONING
6' ADC
BANDGAP REFERENCE
SensorPath BUS
DEVICE NUMBER
DEVICE CONTROL REGISTER
DEVICE STATUS REGISTER
TEMPERATURE CONTROL REGISTER TEMPERATURE DATA READOUT REGISTER
CONVERSION RATE REGISTER
SWD
ADD0 ADD1
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. SensorPath is a trademark of Texas Instruments.
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All other trademarks are the property of their respective owners.
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PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright © 2003–2013, Texas Instruments Incorporated
LM95010
SNIS133D – SEPTEMBER 2003 – REVISED MARCH 2013
Connection Diagram
V+/ 3.3V_SBY
NC
NC
1
8
2
7
LM95010
3
6
NC
4
5
SWD ADD1 ADD0 GND
Figure 1. 8-Lead VSSOP See DGK Package
www.ti.com
Pin Number
1
Pin Name
V+/3.3V SB
2-4
NC
5
GND
6
ADD0
7
ADD1
8
SWD
Type Power
Power Input Input Input/ Output
Description
PIN DESCRIPTION
Typical Connection
Positive power supply pin +3.3V pin.
Ground Address select input that assigns the serial bus device number Address select input that assigns the serial bus device number Single-wire Data, SensorPath serial interface line; Open-drain output
Should be powered by +3.3V Standby power. This pin should be bypassed with a 0.1 µF capacitor. A bulk capacitance of approximately 10 µF needs to be in the near vicinity of the LM95010.
Must be grounded.
System ground
10kΩ resistor to V+ or GND; must never be left floating
10kΩ resistor to V+ or GND; must never be left floating
Super I/O with 1.25kΩ pull-up to 3.3V
Typical Application
+3.3V Standby
C1*
C2
100 pF 0.1 PF
R1**
1 V+ 2 NC 3 NC 4 NC
SWD 8 ADD1 7 ADD0 6
GND 5
LM95010
SWD
Super I/O
* Note, place close to LM30 pins. **Note, R1 may be required for lower power dissipation and depends on bus capacitance.
Figure 2. LM95010 connection to SensorPath master such as a Super I/O.
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
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Product Folder Links: LM95010
Copyright © 2003–2013, Texas Instruments Incorporated
LM95010
www.ti.com
SNIS133D – SEPTEMBER 2003 – REVISED MARCH 2013
Absolute Maximum Ratings (1)(2)
Supply Voltage (V+) Voltage on Pin 2 Voltage on all other Pins Input Current per Pin(3) Package Input Current (3) Package Power Dissipation Output Sink Current Storage Temperature ESD Susceptibility (5)
Soldering Information, Lead Temperature VSSOP Package (6)
Human Body Model Machine Model
Vapor Phase (60 seconds) Infrared (15 seconds)
−0.5 V to 6.0 V −0.3 V to (V+ + 0.3 V)
−0.5 V to 6.0 V 5 mA
30 mA
(4)
10 mA −65 °C to +150 °C
2000 V 200 V
215 °C 220 °C
(1) All voltages are measured with respect to GND, unless otherwise noted. (2) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which .