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LM95172EWG

5 6

OVERTEMP

GND

SI/O

DD ANALOG

DD IO

LM95172

www.ti.com

SNOSB33B –DECEMBER 2009–REVISED MARCH 2013

LM95172 13-Bit to 16-Bit 200°C Digital Temp Sensor with 3-Wire Interface

Check for Samples: LM95172

FEATURES

• Conversion Time

– 13-bit mode 43 ms (max)

• LM95172EWG is AEC-Q100 Grade 0 Qualified

and is Manufactured on an Automotive Grade

– 16-bit mode 350 ms (max)

Flow.

DESCRIPTION

• 13-Bit (0.0625°C LSB) to 16-Bit (0.0078125°C

The LM95172EWG is an integrated digital-output

LSB) Temperature Resolution

temperature sensor with a Serial Peripheral Interface

• Wide −40°C to +200°C Temperature Range

(SPI) and MICROWIRE™-compatible interface in a

• 35 ms Best Conversion Time Tracks Fast

10-pin Cerpack high temperature ceramic package. It

Temp Changes

features a very linear Sigma-Delta Analog-to-Digital

Converter (ADC), high accuracy, fast conversion

• OVERTEMP Digital Output Switches

rates, and extremely low output noise. With an

when T

DIE

> T

HIGH

operating temperature as low as -40°C and optimized

• Shutdown Mode Saves Power yet Wakes up

accuracy from 120°C to 200°C, it is ideal for high-

for One-Shot Temperature Update

temperature applications.

• SPI and MICROWIRE Bus Interface

The over-temperature alarm output (OVERTEMP)

• 10-Pin Cerpack High-Temperature Ceramic

asserts when the die temperature exceeds a

Package

programmed T

HIGH

limit. The user-programmed T

LOW

limit creates a temperature-stabilizing hysteresis

APPLICATIONS

when the ambient temperature is near the trip point.

• Automotive High Temperature Applications

The LM95172EWG can be programmed to operate

from 13 bits (0.0625°C per LSB) to 16 bits

• Industrial Power Controllers

(0.0078125°C per LSB) resolution. The

• Industrial Motors, Gear Boxes

LM95172EWG powers up in 35 ms, the fastest

• Geothermal Instrumentation

conversion time, with temperature output set at 13-bit

resolution. The resolution may then be changed to

• High Temperature Test Equipment

14-, 15- or 16-bits. When in the 13-, 14- or 15-bit

resolution mode, the least significant bit in the 16-bit

KEY SPECIFICATIONS

temperature register toggles after the completion of

• Analog and Digital Supply Voltage 3.0V to 5.5V

each conversion. This bit may be monitored to verify

that the conversion is complete.

• Total Supply Current Operating 400 µA

(typ)

The high noise immunity of the Serial I/O (SI/O)

– Shutdown −40°C to +140°C 4 µA (max)

output makes the LM95172EWG ideal for use in

challenging electromagnetic environments.

– Shutdown −40°C to +175°C 12 µA (max)

– Shutdown −40°C to +200°C 28 µA (max)

Connection Diagram

• Temperature Accuracy

– +175°C to +200°C ±3.0°C (max)

– +130°C to +160°C ±1.0°C (max)

– +120°C to +130°C ±2.0°C (max)

– +160°C to +175°C ±2.0°C (max)

– −40°C to +120°C ±3.5°C (max)

• Temperature Resolution

– 13-bit mode 0.0625°C/LSB

– 16-bit mode 0.0078125°C/LSB

Figure 1. LM95172EWG- Top View

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.

2All 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 (22 pages)

PAGE 1
LM95172 www.ti.com SNOSB33B – DECEMBER 2009 – REVISED MARCH 2013 LM95172 13-Bit to 16-Bit 200°C Digital Temp Sensor with 3-Wire Interface Check for Samples: LM95172 FEATURES 1 • 2 • • • • • • • LM95172EWG is AEC-Q100 Grade 0 Qualified and is Manufactured on an Automotive Grade Flow. 13-Bit (0.0625°C LSB) to 16-Bit (0.
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LM95172 SNOSB33B – DECEMBER 2009 – REVISED MARCH 2013 www.ti.com PIN DESCRIPTIONS Pin Number Name Type 1 OVERTEMP Output 2 SC 3 4 Description Typical Connection OVERTEMP Alarm Over-temperature Alarm Output, Open-drain. Active Low on POR. Requires a pull-up resistor to VDD IO. Input Serial Clock input Serial clock from the Controller NC N/A No Connect Do not connect to this pin. CS Input Chip Select input Chip Select input for the bus. Low pass filtered.
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LM95172 www.ti.com SNOSB33B – DECEMBER 2009 – REVISED MARCH 2013 Typical Application 3.0 to 5.5 Volts VDD IO VDD IO VDD ANALOG RPULL-UP 10k CS Microcontroller OVERTEMP SC LM95172EWG SI/O GND OVERTEMP GND Figure 2. Microcontroller Interface - normal connection 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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LM95172 SNOSB33B – DECEMBER 2009 – REVISED MARCH 2013 www.ti.com Temperature-to-Digital Converter Characteristics Unless otherwise noted, these specifications apply for VDD ANALOG = VDD IO = 3.0V to 3.6V. (1)Boldface limits apply for TA =−40°C to +200°C; all other limits TA = 25°C, unless otherwise noted. Parameter Temperature Accuracy (1) Conditions Typical (2) TA = +175°C to +200°C ±3.0 TA = +130°C to +160°C ±1.0 TA = +120°C to +130°C ±2.0 TA = +160°C to +175°C ±2.
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LM95172 www.ti.com SNOSB33B – DECEMBER 2009 – REVISED MARCH 2013 Logic Electrical Characteristics Digital DC Characteristics Unless otherwise noted, these specifications apply for VDD ANALOG = VDD IO = 3.0V to 3.6V. 40°C to 200°C; all other limits TA = +25°C, unless otherwise noted.
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LM95172 SNOSB33B – DECEMBER 2009 – REVISED MARCH 2013 www.ti.com CS t2 SC tr t1 t4 t3 tf t4 SI/O Output Figure 3. Data Output Timing Diagram CS CS SC SC t5 SI/O Output t5 SI/O Output Figure 4. TRI-STATE Data Output Timing Diagram CS CS t8 t8 SC SC t7 t7 t6 t6 SI/O Input SI/O Input Figure 5. Data Input Timing Diagram tBUF CS Figure 6. tBUF Timing Definition Diagram tTA SI/O Output SI/O Input Figure 7.
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LM95172 www.ti.com SNOSB33B – DECEMBER 2009 – REVISED MARCH 2013 Figure 8. TRI-STATE Test Circuit VDD IO IOL = 1.6 mA LM95172QA2 Pad 10 SI/O 1.4V C1 80 pF IOH = -1.
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LM95172 SNOSB33B – DECEMBER 2009 – REVISED MARCH 2013 www.ti.com FUNCTIONAL DESCRIPTION The LM95172EWG temperature sensor incorporates a temperature sensor and a 13-bit to 16-bit ΣΔ ADC (Sigma-Delta Analog-to-Digital Converter). Compatibility of the LM95172EWG'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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LM95172 www.ti.com SNOSB33B – DECEMBER 2009 – REVISED MARCH 2013 Power-Up Sequence WARNING In all cases listed below the VDD IOwaveform ANALOG waveform must not lag the VDD Linear Power-up In the case where the VDD ANALOG and VDD IO voltage-vs.-time function is linear, the specified minimum operating voltage must be reached in 5 ms or less. Resistor-Capacitor (R-C) Charging Exponential Power-up In the case where the VDD ANALOG and VDD IO voltage-vs.
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LM95172 SNOSB33B – DECEMBER 2009 – REVISED MARCH 2013 www.ti.com OVERTEMP Reset %LW VHW WR ³1´ THIGH Limit Measured Temperature TLOW Limit OVERTEMP Output Polarity = Active Low Up to 1 Conversion Time 1 Conversion Time NOTE: The OVERTEMP output asserts when the measured temperature is greater than the THIGH value. Figure 10. LM95172EWG OVERTEMP vs. Temperature Response Diagram The OVERTEMP Output will assert when the measured temperature is greater than the THIGH value.
PAGE 11
LM95172 www.ti.com SNOSB33B – DECEMBER 2009 – REVISED MARCH 2013 CS 1 16 1 D0 P7 8 1 16 P0 D16 SC D16 Temperature Reg Read (16 bits) SI/O Command Byte Write (8 bits) D0 Data Register Read or Write (16 bits) Figure 12.
PAGE 12
LM95172 SNOSB33B – DECEMBER 2009 – REVISED MARCH 2013 www.ti.com Table 1. 13-Bit Resolution. First Bit (D15) is Sign, the last bit (D0) is Toggle and bits D1 and D2 are always 0. (continued) 13-bit Resolution Digital Output Temperature −40°C 16-bit Binary All 16 Bits Bits D15 - D3 Hex Hex 1110110000000 000 EC00 1110110000000 001 EC01 1D80 Table 2. 14-Bit Resolution. First bit (D15) is Sign, the last bit (D0) is Toggle and bit D1 is always 0.
PAGE 13
LM95172 www.ti.com SNOSB33B – DECEMBER 2009 – REVISED MARCH 2013 Table 4. 16-Bit Resolution. First bit (D15) is Sign and the last bit (D0) is the LSB. 16-bit Resolution Digital Output Temperature All 16 Bits 16-bit Binary Hex +175°C 0101 0111 1000 0000 5780 +150°C 0100 1011 0000 0000 4B00 +80°C 0010 1000 0000 0000 2800 +25°C 0000 1100 1000 0000 0C80 +0.0078125°C 0000 0000 0000 0001 0001 0°C 0000 0000 0000 0000 0000 −0.
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LM95172 SNOSB33B – DECEMBER 2009 – REVISED MARCH 2013 (1) www.ti.com P2 P1 P0 0 0 0 Register 0 0 1 Control/Status 0 1 0 THIGH 0 1 1 TLOW 1 0 0 1 0 1 1 1 0 1 1 1 Invalid. Invalid. (1) (1) Identification Invalid. The LM95172EWG will return a "0" if read. If written to, no valid register will be modified.
PAGE 15
LM95172 www.ti.com SNOSB33B – DECEMBER 2009 – REVISED MARCH 2013 Bit <15>: Shutdown (SD) Bit. Writing a “1” to this bit and holding it high for at least the specified maximum conversion time, at the existing temperature resolution setting, enables the Shutdown Mode. Writing a “0” to this bit restores the LM95172EWG to normal mode. Bit <14>: One-Shot Bit. When in shutdown mode (Bit <15> is "1"), initiates a single temperature conversion and update of the temperature register with new temperature data.
PAGE 16
LM95172 SNOSB33B – DECEMBER 2009 – REVISED MARCH 2013 www.ti.com Reset Conditions: Upon Power-on Reset. THIGH: Upper Limit Register (Read/Write) Pointer Address: 82h (Read); 02h (Write) D15 D14 D13 D12 D11 D10 D9 D8 Sign 128°C 64°C 32°C 16°C 8°C 4°C 2°C D4 D3 D2 D1 D0 D7 D6 D5 1°C 0.5°C 0.25°C Reserved Bit <15:5>: Upper-Limit Temperature byte.
PAGE 17
LM95172 www.ti.com SNOSB33B – DECEMBER 2009 – REVISED MARCH 2013 Typical Applications +3.3 VDC CS GPI/O RXD INTEL 196 Microcontroller 100 nF VDD IO VDD ANALOG 10k LM95172EWG SI/O OVERTEMP SC TXD GND OVERTEMP Figure 14. Temperature monitor using Intel 196 processor +3.3 VDC VDD ANALOG VDD IO 100 nF CS 10k GPI/O1 10k GPI/O2 MSIO 68HC11 Microcontroller SI/O LM95172EWG OVERTEMP SC SC GND OVERTEMP Figure 15. LM95172EWG digital input control using microcontroller's general purpose I/O.
PAGE 18
LM95172 SNOSB33B – DECEMBER 2009 – REVISED MARCH 2013 www.ti.com REVISION HISTORY Changes from Revision A (March 2013) to Revision B • 18 Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
PAGE 20
PACKAGE OPTION ADDENDUM www.ti.com 20-Nov-2013 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
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MECHANICAL DATA NAC0010A WG10A (Rev H) www.ti.
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