Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsLM95071CIMF/NOPB

Temperature

Sensor

Circuitry

Control

Logic

Temperature

Manufacturer's

ID Register

Three-Wire

Serial Interface

14-Bit

Delta-Sigma

A/D Converter

SI/O

LM95071/

LM95071-Q1

GND

SI/O SC

LM95071/

LM95071-Q1

LM95071, LM95071-Q1

www.ti.com

SNIS137D –AUGUST 2004–REVISED SEPTEMBER 2013

LM95071/LM95071-Q1 SPI/MICROWIRE 13-Bit Plus Sign Temperature Sensor

Check for Samples: LM95071, LM95071-Q1

FEATURES

• Temperature Accuracy

– 0°C to 70°C ±1°C (max)

• Small SOT-23 Package Saves Space

– −40°C to 150°C ±2°C (max)

• Shutdown Mode Conserves Power Between

Temperature Readings

• Temperature Resolution 0.03125 °C

• Operates Over a Full −40°C to +150°C Range

DESCRIPTION

• SPI and MICROWIRE Bus Interface

The LM95071/LM95071-Q1 is a low-power, high-

• LM95071-Q1 is AEC-Q100 Grade 0 qualified

resolution digital temperature sensor with an SPI and

and is manufactured on an Automotive Grade

MICROWIRE compatible interface, available in the 5-

flow

pin SOT-23. The host can query the

LM95071/LM95071-Q1 at any time to read

APPLICATIONS

temperature. Its low operating current is useful in

systems where low power consumption is critical.

• Automotive

The LM95071/LM95071-Q1 has 13-bit plus sign

• System Thermal Management

temperature resolution (0.03125°C per LSB) while

• Portable Electronic Devices

operating over a temperature range of −40°C to

• Personal Computers

+150°C.

• Disk Drives

The LM95071/LM95071-Q1’s 2.4V to 5.5V supply

• Office Electronics

voltage range, fast conversion rate, low supply

current, and simple SPI interface make it ideal for a

• Electronic Test Equipment

wide range of applications.

KEY SPECIFICATIONS

• Supply Voltage 2.4V to 5.5V

• Supply Current

– operating 280 µA (typ)

– shutdown 6 µA (typ)

Simplified Block Diagram Connection Diagram

SOT-23

(TOP VIEW)

See Package Number DBV (R-PDSO-G5)

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.

2TRI-STATE is a registered trademark of National Semiconductor Corporation.

3All other trademarks are the property of their respective owners.

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.

Summary of content (20 pages)

PAGE 1
LM95071, LM95071-Q1 www.ti.
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LM95071, LM95071-Q1 SNIS137D – AUGUST 2004 – REVISED SEPTEMBER 2013 www.ti.com Pin Description Pin Number Symbol Name Description 1 CS Chip Select input This pin receives an active-low signal from the controller to select the device. 2 GND Ground This is the power and signal ground return. 3 SI/O Serial Input/Output This serial, bidirectional, data bus pin transmits and receives signals to and from the controller. Schmitt trigger input in the input mode.
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LM95071, LM95071-Q1 www.ti.com SNIS137D – AUGUST 2004 – REVISED SEPTEMBER 2013 Operating Ratings Specified Temperature Range (1), TMIN to TMAX −40°C to +150°C Supply Voltage Range (VDD) 2.4V to +5.5V The life expectancy of the LM95071/LM95071-Q1 will be reduced when operating at elevated temperatures. LM95071/LM95071-Q1 θJA (thermal resistance, junction-to-ambient) when attached to a printed circuit board with 2 oz. foil is summarized in the table below.
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LM95071, LM95071-Q1 SNIS137D – AUGUST 2004 – REVISED SEPTEMBER 2013 www.ti.com SERIAL BUS DIGITAL SWITCHING CHARACTERISTICS Unless otherwise noted, these specifications apply for VDD = 2.4V to 5.5V (1); CL (load capacitance) on output lines = 100 pF unless otherwise specified. Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = +25°C, unless otherwise noted.
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LM95071, LM95071-Q1 www.ti.com SNIS137D – AUGUST 2004 – REVISED SEPTEMBER 2013 SC SC t7 t7 t8 t6 t6 CS CS SI SI t8 Figure 4. Data Input Timing Diagram Electrical Characteristics 01,0010,1100,0000 Output Code +25°C +0.03125°C 00,0011,0010,0000 00,0000,0000,0001 Temperature 00,0000,0000,0000 0°C -40°C 11,1111,1111,1111 -0.03125°C +150°C 11,1100,1110,0000 -25°C 11,1011,0000,0000 Figure 5.
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LM95071, LM95071-Q1 SNIS137D – AUGUST 2004 – REVISED SEPTEMBER 2013 www.ti.com TRI-STATE Test Circuit +3.3V IOL = 1.6 mA To LM95071/ LM95071-Q1 SI/O Pin 80 pF 1.4V IOH = -1.
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LM95071, LM95071-Q1 www.ti.com SNIS137D – AUGUST 2004 – REVISED SEPTEMBER 2013 TYPICAL PERFORMANCE CHARACTERISTICS Static Supply Current vs. Temperature Maximum Temperature Error Figure 6. Figure 7. Conversion Time vs Temperature Typical Output Noise at 30°C Figure 8. Figure 9.
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LM95071, LM95071-Q1 SNIS137D – AUGUST 2004 – REVISED SEPTEMBER 2013 www.ti.com FUNCTIONAL DESCRIPTION The LM95071/LM95071-Q1 temperature sensor incorporates a temperature sensor and 13-bit-plus-sign ΔΣ ADC (Delta-Sigma Analog-to-Digital Converter). Compatibility of the LM95071/LM95071-Q1's three-wire serial interface with SPI and MICROWIRE allows simple communications with common microcontrollers and processors. Shutdown mode can be used to optimize current drain for different applications.
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LM95071, LM95071-Q1 www.ti.com SNIS137D – AUGUST 2004 – REVISED SEPTEMBER 2013 TEMPERATURE DATA FORMAT Temperature data is represented by a 14-bit, two's complement word with an LSB (Least Significant Bit) equal to 0.03125°C: Digital Output Temperature Binary Hex +150°C 0100 1011 0000 0011 4B03 +125°C 0011 1110 1000 0011 3E83 +25°C 0000 1100 1000 0011 0C83 +0.03125°C 0000 0000 0000 0111 0007 0°C 0000 0000 0000 0011 0003 −0.
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LM95071, LM95071-Q1 SNIS137D – AUGUST 2004 – REVISED SEPTEMBER 2013 www.ti.com D0–D1: Logic 1 will be output on SI/0. D2–D15: Temperature Data. One LSB = 0.03125°C. Two's complement format. Manufacturer/Device ID Register Table 3. (Read Only): D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 1 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 D0–D1: Logic 1 will be output on SI/0. D2–D15: Manufacturer/Device ID Data.
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LM95071, LM95071-Q1 www.ti.com SNIS137D – AUGUST 2004 – REVISED SEPTEMBER 2013 SERIAL BUS TIMING DIAGRAMS 1 8 SC CS SO D15 D14 D8 Figure 10. Reading Continuous Conversion - Single Eight-Bit Frame 1 8 1 8 SC CS SO D15 D14 D7 TRI-STATE D2 Figure 11. Reading Continuous Conversion - Two Eight-Bit Frames 1 8 1 8 1 8 1 8 SC CS SI/O D15 D14 D7 D15 D14 D2 Data from the LM95071/ LM95071-Q1 TRISTATE D8 D7 D0 D6 Data from the Controller Figure 12.
PAGE 12
LM95071, LM95071-Q1 SNIS137D – AUGUST 2004 – REVISED SEPTEMBER 2013 www.ti.com APPLICATION HINTS THERMAL PATH CONSIDERATIONS To get the expected results when measuring temperature with an integrated circuit temperature sensor like the LM95071/LM95071-Q1, it is important to understand that the sensor measures its own die temperature. For the LM95071/LM95071-Q1, the best thermal path between the die and the outside world is through the LM95071/LM95071-Q1's pins.
PAGE 13
LM95071, LM95071-Q1 www.ti.com SNIS137D – AUGUST 2004 – REVISED SEPTEMBER 2013 +5V 68HC11 Microcontroller LM95071/ LM95071-Q1 GPI/O1 10k GPI/O2 MISO CS 0.1 PF VDD SI/O SC GND SC Figure 15. LM95071/LM95071-Q1 digital input control using microcontroller's general purpose I/O.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided.
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PACKAGE MATERIALS INFORMATION www.ti.com 18-Oct-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) LM95071CIMF SOT-23 DBV 5 1000 178.0 8.4 LM95071CIMF/NOPB SOT-23 DBV 5 1000 178.0 LM95071CIMFX SOT-23 DBV 5 3000 178.0 LM95071CIMFX/NOPB SOT-23 DBV 5 3000 LM95071QIMF/NOPB SOT-23 DBV 5 LM95071QIMFX/NOPB SOT-23 DBV 5 3.2 3.2 1.4 4.0 8.0 Q3 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 18-Oct-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM95071CIMF SOT-23 DBV 5 1000 210.0 185.0 35.0 LM95071CIMF/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LM95071CIMFX SOT-23 DBV 5 3000 210.0 185.0 35.0 LM95071CIMFX/NOPB SOT-23 DBV 5 3000 210.0 185.0 35.0 LM95071QIMF/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LM95071QIMFX/NOPB SOT-23 DBV 5 3000 210.
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