Temperature Sensor. LM73 Datasheet

LM73 Sensor. Datasheet pdf. Equivalent

LM73 Datasheet
Recommendation LM73 Datasheet
Part LM73
Description 11- to 14-Bit Digital Temperature Sensor
Feature LM73; Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM73 SNIS1.
Manufacture etcTI
Datasheet
Download LM73 Datasheet




etcTI LM73
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
LM73
SNIS141F – OCTOBER 2005 – REVISED OCTOBER 2015
LM73 2.7-V, SOT-23, 11- to 14-Bit Digital Temperature Sensor With 2-Wire Interface
1 Features
1 Single Address Pin Offers Choice of Three
Selectable Addresses Per Version for a Total of
Six Possible Addresses.
• SMBus and I2C-compatible Two-Wire Interface
• Supports 400-Khz Operation
• Shutdown Mode With One-shot Feature Available
for Very Low Average Power Consumption
• Programmable Digital Temperature Resolution
From 11 Bits to 14 Bits
• Fast Conversion Rate Ideal for Quick Power Up
and Measuring Rapidly Changing Temperature
• Open-Drain ALERT Output Pin Goes Active When
Temperature is Above a Programmed
Temperature Limit
• Very Stable, Low-noise Digital Output
• UL Recognized Component
Key Specifications
– Supply Current
– Operating
– 320 µA (Typical)
– 495 µA (Maximum)
– Shutdown
– 8 µA (Maximum)
– 1.9 µA (Typical)
– Temperature Accuracy
10°C to 80°C: ±1.0°C (Maximum)
25°C to 115°C: ±1.5°C (Maximum)
40°C to 150°C: ±2°C (Maximum)
– Resolution
– 0.25°C to 0.03125°C
– Conversion Time
– 11-Bit (0.25°C): 14 ms (Maximum)
– 14-Bit (0.03125°C): 112 ms (Maximum)
2 Applications
• Portable Electronics
• Notebook Computers
• Automotive
• System Thermal Management
• Office Electronics
3 Description
The LM73 is an integrated, digital-output temperature
sensor featuring an incremental Delta-Sigma ADC
with a two-wire interface that is compatible with the
SMBus and I2C interfaces. The host can query the
LM73 at any time to read temperature.
Available in a 6-pin SOT package, the LM73 occupies
very little board area while operating over a wide
temperature range (–40°C to 150°C) and providing
±1°C accuracy from –10°C to 80°C. The user can
optimize between the conversion time and the
sensitivity of the LM73 by programming it to report
temperature in any of four different resolutions.
Defaulting to 11-bit mode (0.25°C/LSB), the LM73
measures temperature in a maximum time of 14 ms,
making it ideal for applications that require
temperature data very soon after power-up. In its
maximum resolution, 14-bit mode (0.03125°C/LSB),
the LM73 is optimized to sense very small changes in
temperature.
A single multi-level address line selects one of three
unique device addresses. An open-drain ALERT
output goes active when the temperature exceeds a
programmable limit. Both the data and clock lines are
filtered for excellent noise tolerance and reliable
communication. Additionally, a time-out feature on the
clock and data lines causes the LM73 to
automatically reset these lines if either is held low for
an extended time, thus exiting any bus lock-up
condition without processor intervention.
Device Information(1)
PART NUMBER PACKAGE
BODY SIZE (NOM)
LM73
SOT (6)
2.90 mm × 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Application
VDD = 2.7V to 5.5V
Address (set as desired for one
of three addresses)
ADDR
To / from processor
2-wire interface
SMBDAT
SMBCLK
1
6
4
3
LM73
5
2
Typical bypass 0.1 PF
To hardware
ALERT shutdown
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.



etcTI LM73
LM73
SNIS141F – OCTOBER 2005 – REVISED OCTOBER 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings ............................................................ 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Temperature-to-Digital Converter Characteristics..... 5
6.6 Logic Electrical Characteristics- Digital DC
Characteristics ........................................................... 6
6.7 Logic Electrical Characteristics- SMBus Digital
Switching Characteristics........................................... 7
6.8 Typical Characteristics .............................................. 8
7 Detailed Description .............................................. 9
7.1 Overview ................................................................... 9
7.2 Functional Block Diagram ......................................... 9
7.3 Feature Description................................................... 9
7.4 Device Functional Modes........................................ 15
7.5 Register Map........................................................... 16
8 Application and Implementation ........................ 20
8.1 Application Information............................................ 20
8.2 Typical Application ................................................. 20
9 Power Supply Recommendations...................... 22
10 Layout................................................................... 22
10.1 Layout Guidelines ................................................. 22
10.2 Layout Example .................................................... 22
11 Device and Documentation Support ................. 23
11.1 Community Resources.......................................... 23
11.2 Trademarks ........................................................... 23
11.3 Electrostatic Discharge Caution ............................ 23
11.4 Glossary ................................................................ 23
12 Mechanical, Packaging, and Orderable
Information ........................................................... 23
4 Revision History
Changes from Revision E (January 2015) to Revision F
Page
• Changed Temperature Accuracy spec typo on the front page............................................................................................... 1
Changes from Revision D (May 2009) to Revision E
Page
• Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional
Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device
and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1
2 Submit Documentation Feedback
Product Folder Links: LM73
Copyright © 2005–2015, Texas Instruments Incorporated



etcTI LM73
www.ti.com
5 Pin Configuration and Functions
SOT-23
6 PINS
TOP VIEW
LM73
SNIS141F – OCTOBER 2005 – REVISED OCTOBER 2015
ADDR
1
6 SMBDAT
GND 2 LM73 5 ALERT
VDD
3
4 SMBCLK
PIN
NO. NAME
TYPE
Pin Functions
EQUIVALENT CIRCUIT
FUNCTION
1 ADDR
2 GND
3 VDD
CMOS
Logic
Input
(three
levels)
PIN
Ground
Power
VDD
D1
Snap
Back
2.5k D2
D3
Address Select Input: One of three device addresses is selected by
connecting to ground, left floating, or connecting to VDD.
GND
Ground
Supply Voltage
PIN
CMOS
4 SMBCLK Logic
Input
Snap D1
Back
Serial Clock: SMBus clock signal. Operates up to 400 kHz. Low-pass
filtered.
GND
5 ALERT
Open-
Drain
Output
PIN
D1
Snap
Back
VDD
125 D2 Digital output which goes active whenever the measured temperature
exceeds a programmable temperature limit.
D3
GND
Open-
PIN
6
SMBDAT
Drain
Input/Outp
ut
Snap D1
Back
Serial Data: SMBus bi-directional data signal used to transfer serial
data synchronous to the SMBCLK. Low-pass filtered.
GND
Copyright © 2005–2015, Texas Instruments Incorporated
Product Folder Links: LM73
Submit Documentation Feedback
3







@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)