LM95010CIMM National Semiconductor, LM95010CIMM Datasheet

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LM95010CIMM

Manufacturer Part Number
LM95010CIMM
Description
Digital Temperature Sensor with SensorPath Bus in MSOP8 Package
Manufacturer
National Semiconductor
Datasheet

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© 2003 National Semiconductor Corporation
LM95010
Digital Temperature Sensor with SensorPath
MSOP8 Package
General Description
The LM95010 is a digital output temperature sensor that has
single-wire interface compatible with National Semiconduc-
tor’s SensorPath interface. It uses a ∆V
ture sensing technique that generates a differential voltage
that is proportional to temperature. This voltage is digitized
using a Sigma-Delta analog-to-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 con-
trolled 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 micro-controllers.
Features
n SensorPath Bus
Block Diagram
SensorPath
— 4 hardware programmable addresses
is a trademark of National Semiconductor Corporation.
DS200820
be
analog tempera-
n Temperature Sensing
n 8-lead MSOP package
Key Specifications
n Temperature Sensor Accuracy
n Temperature Range
n Power Supply Voltage
n Power Supply Current
n Conversion Time
Applications
n Microprocessor based equipment
n Power Supplies
— 0.25 ˚C resolution
— 127.75 ˚C maximum temperature reading
— (Motherboards, Base-stations, Routers, ATMs, Point
of Sale, …)
Bus in
−20 ˚C to +125 ˚C
14 ms to 1456 ms
20082001
November 2003
+3.0V to +3.6V
www.national.com
±
0.5 mA (typ)
2 ˚C (max)

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LM95010CIMM Summary of contents

Page 1

... Features n SensorPath Bus — 4 hardware programmable addresses Block Diagram SensorPath ™ trademark of National Semiconductor Corporation. © 2003 National Semiconductor Corporation n Temperature Sensing — 0.25 ˚C resolution — 127.75 ˚C maximum temperature reading n 8-lead MSOP package analog tempera- ...

Page 2

... Typical Application FIGURE 1. LM95010 connection to SensorPath master such as a Super I/O. www.national.com Ordering Information Order Number LM95010CIMM LM95010CIMMX 20082002 Typical Connection 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 the near vicinity of the LM95010 ...

Page 3

... Infrared (15 seconds) −0 6.0 V Operating Ratings 5 mA (Notes (Note 5) Temperature Range for 10 mA Electrical Characteristics −65 ˚C to +150 ˚C LM95010CIMM Operating Temperature Range 2000 V Supply Voltage Range (V+) 200 unless otherwise specified in the conditions. Boldface limits +25 ˚C. A Conditions ...

Page 4

SWD and ADD DIGITAL INPUT CHARACTERISTICS Symbol Parameter C Digital Input Capacitance IN SWD DIGITAL OUTPUT CHARACTERISTICS Symbol Parameter V Open-drain Output Logic “Low” OL Voltage I Open-drain Output Off Current OH C Digital Output Capacitance OUT AC Electrical Characteristics ...

Page 5

FIGURE 2. Timing for Data Bits 0, 1 and Start Bit. See Section 1.2 "Bit Signaling" for further details. 5 20082004 www.national.com ...

Page 6

FIGURE 3. Timing for Attention Request and Reset. See Section 1.2 "Bit Signaling" for further details. www.national.com 6 20082005 ...

Page 7

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee performance limits. For guaranteed specifications and test conditions, see the Electrical ...

Page 8

... Sigma-Delta analog to digital converter. The digital temperature data can be retrieved over a simple single-wire interface called SensorPath. SensorPath has been defined by National Semiconductor and is optimized for hardware monitoring. National offers a royalty-free li- cense in connection with its intellectual property rights in the SensorPath bus. ...

Page 9

Functional Description drive by the master. Signals labels that begin with the label Slv_ depict the drive by the LM95010. All other signals show what would be seen when probing SWD for a particular function (e.g. "Master Wr 0" ...

Page 10

Functional Description 1.3.2 Read Transaction During a read transaction, the master reads data from a register at a specified address within a slave. A read trans- action begins with a Start Bit and ends with an ACK bit, as ...

Page 11

Functional Description • Data Bits This is the data written to the LM95010 regis- ter, are driven by the master. Data is transferred serially with the most significant bit first. The number of data bits may vary from one ...

Page 12

Functional Description 1. A bus error event occurred, and 2. the "physical" condition for an Attention Request is met (i.e., the bus is inactive), and 3. At the first time 2. is met after 1 occurred, there has not ...

Page 13

... Name W R MSb Val Manufacturer 000 001 R 100Bh 0 ID The manufacturer ID matches that assigned to National Semiconductor by the PCI SIG. This register may be used to identify the manufacturer of the device in order to perform manufacturer specific operations. 2.5 DEVICE ID (Addr 02o) P Bit Reg Register Add ...

Page 14

Register Set (Continued) 2.6 CAPABILITIES FIXED (Addr 03o) P Reg Register R/ O Add Name W R MSb Val Capabilities 000 011 R 1h Fixed The value of this register defines the capabilities of the LM95010. The LM95010 supports ...

Page 15

Register Set (Continued) Bit Type 1 R/W Shutdown (Shutdown Mode). When set to "1" this bit stops the operation of all functions and places the device in the lowest power consumption mode. 0: Device in Active Mode. (default) 1: ...

Page 16

Register Set (Continued) Bit Type 2-0 R Resolution. This field defines the value of 1 LSb of the Temperature Readout field in the Readout Register. The SensorPath specification defines many different weights for the temperature LSb. The LM95010 supports ...

Page 17

Register Set (Continued) 2.9.4 Temperature Control (Addr 12o) This register is set to the reset value by a Device Reset. P Bit Reg Register Add Name W R MSb Val Temperature R/ 001 010 Control W ...

Page 18

Applications Information 3.1 MOUNTING CONSIDERATIONS The LM95010 can be applied easily in the same way as other integrated-circuit temperature sensors. It can be glued or cemented to a surface. The temperature that the LM95010 is reading will typically be ...

Page 19

... National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. inches (millimeters) JEDEC Registration Number MO-187, Order Number LM95010CIMM, or LM95010CIMMX, NS Package Number MUA08A 2. A critical component is any component of a life ...

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