Temperature Sensor. LM71 Datasheet

LM71 Sensor. Datasheet pdf. Equivalent


etcTI LM71
LM71, LM71-Q1
SNIS125E – MARCH 2004 – REVISED AUGUST 2018
LM71/LM71-Q1 SPI/MICROWIRE 13-Bit Plus Sign Temperature Sensor
1 Features
1 LM71Q is AEC-Q100 Grade 0 Qualified and is
Manufactured on an Automotive Grade Flow
• 5-Pin SOT-23 Package or 6-Pin No-Pull-Back
WSON Package
• Operates Over a Full 40°C to +150°C Range
• SPI and MICROWIRE Bus Interface
• Key Specifications:
– Supply Voltage: 2.65V to 5.5V
– Supply Current
– Operating: 300 µA (typ)
– 550 µA (max)
– Temperature Accuracy
10°C to +65°C: ±1.5°C (max)
40°C to 150°C: +3/2°C (max)
– Temperature Resolution: 31.25 m°C
2 Applications
• System Thermal Management
• Personal Computers
• Portable Electronic Devices
• Disk Drives
• Office Electronics
• Electronic Test Equipment
• Vending Machines
• Automotive
3 Description
The LM71 is a low-power, high-resolution digital
temperature sensor with an SPI and MICROWIRE
compatible interface, available in the 5-pin SOT-23 or
the 6-pin WSON (no pull back) package. The host
can query the LM71 at any time to read temperature.
Its low operating current is useful in systems where
low power consumption is critical.
The LM71 has 13-bit plus sign temperature resolution
(0.03125°C per LSB) while operating over a
temperature range of 40°C to +150°C.
The LM71’s 2.65V to 5.5V supply voltage range, fast
conversion rate, low supply current, and simple SPI
interface make it ideal for a wide range of
applications. The LM71Q is available in the 5-lead
SOT-23 package only.
Simplified Block Diagram
2.65V to 5.5V
Temperature
Sensor
Circuitry
14-Bit
Delta-Sigma
A/D Converter
LM71
Control
Logic
Temperature
Register
Manufacturer's
ID Register
CS
Three-Wire
Serial Interface
SI/O
SC
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.


LM71 Datasheet
Recommendation LM71 Datasheet
Part LM71
Description SPI/MICROWIRE 13-Bit Plus Sign Temperature Sensor
Feature LM71; LM71, LM71-Q1 SNIS125E – MARCH 2004 – REVISED AUGUST 2018 LM71/LM71-Q1 SPI/MICROWIRE 13-Bit Plus Sig.
Manufacture etcTI
Datasheet
Download LM71 Datasheet




etcTI LM71
LM71, LM71-Q1
SNIS125E – MARCH 2004 – REVISED AUGUST 2018
3.1 Connection Diagram
CS 1
5 V+
GND 2 LM71
SI/O 3
4 SC
www.ti.com
SC 1
6 V+
GND 2 LM71 5 GND
SI/O 3
4 CS
Figure 1. 5-Pin SOT-23
See Package Number DBV
Figure 2. 6-Pin WSON No Pull-Back
See Package Number NGG0006A
Label
CS
GND
SI/O
SC
V+
Table 1. PIN DESCRIPTIONS
Pin Number
SOT-23-5 WSON-6
14
2 2, 5
33
41
Function
Chip Select input
Power Supply Ground
Slave Input/Output - Serial bus bi-directional
data line. Schmitt trigger input.
Slave Clock - Serial bus clock Schmitt trigger
input line
5 6 Positive Supply Voltage Input
Typical Connection
From controller
Connect all GND Pins to ground
From and to controller
From controller
DC voltage from 2.65V to 5.5V. Bypass with
a 0.1 μF ceramic capacitor.
3.2 Typical Application
Figure 3. COP Microcontroller Interface
3.1 Electrostatic Discharge Caution
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.
3.2 Trademarks
All trademarks are the property of their respective owners.
2 Submit Documentation Feedback
Copyright © 2004–2018, Texas Instruments Incorporated
Product Folder Links: LM71 LM71-Q1



etcTI LM71
www.ti.com
LM71, LM71-Q1
SNIS125E – MARCH 2004 – REVISED AUGUST 2018
4 Absolute Maximum Ratings(1)
Supply Voltage
Voltage at any Pin
Input Current at any Pin(2)
Storage Temperature
Soldering Information, Lead Temperature
ESD Susceptibility(3)
SOT-23-5 Package
WSON-6 Package
Human Body Model
Machine Model
Vapor Phase (60 seconds)
Infrared (15 seconds)
Infrared (5 seconds)
0.3V to 6.0V
0.3V to V+ + 0.3V
5 mA
65°C to +150°C
215°C
220°C
215°C
2000V
200V
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not
apply when operating the device beyond its rated operating conditions.
(2) When the input voltage (VI) at any pin exceeds the power supplies (VI < GND or VI > +VS) the current at that pin should be limited to 5
mA.
(3) Human body model, 100 pF discharged through a 1.5 kΩ resistor. Machine model, 200 pF discharged directly into each pin.
5 Operating Ratings
Specified Temperature Range(1) (TMIN to TMAX)
Supply Voltage Range (+VS)
LM71CIMF, LM71CISD, LM71QCIMF
LM71CIMF, LM71CISD, LM71QCIMF
40°C to +150°C
+2.65V to +5.5V
(1) The life expectancy of the LM71 will be reduced when operating at elevated temperatures. LM71 θJA (thermal resistance, junction-to-
ambient) when attached to a printed circuit board with 2 oz. foil is summarized in the table below:
Copyright © 2004–2018, Texas Instruments Incorporated
Product Folder Links: LM71 LM71-Q1
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