LM95172QA2MDA NSC [National Semiconductor], LM95172QA2MDA Datasheet
LM95172QA2MDA
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LM95172QA2MDA Summary of contents
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Digital Temperature Sensor in Die Form with ±1°C Accuracy from 130°C to 160°C General Description The LM95172Q is a digital temperature sensor with industry- leading accuracy at temperatures up to 175°C. It features a linear Sigma-Delta Analog-to-Digital Converter (ADC) with ...
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Connection Diagram Bond Pad Mechanical Dimensions Origin of coordinates: center of die. Coordinates refer to center of Bond Pad. X-Direction is in the longitudinal axis of the die. Opening Sizes (Pads 1- and 10) = 69.2 µm x ...
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Pad Name Type Number 10 SI/O Bidirectional Serial I/O Backside BACK N/A Ordering Information Order Number LM95172QA2 MDA Typical Application FIGURE 1. Microcontroller Interface - normal connection Description Serial I/O Data line to or from the Controller Substrate connection May ...
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Absolute Maximum Ratings V and V Supply DD ANALOG DD IO Voltages Voltage at any SI/O, SC, and CS Pins (Note 7) Voltage at OVERTEMP Pin Input Current at any Pin (Note 2) Storage Temperature ESD Susceptibility (Note 4) Human ...
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Logic Electrical Characteristics Digital DC Characteristics Unless otherwise noted, these specifications apply for all other limits MIN MAX Symbol Parameter V Logical "1" Input Voltage IH V Logical ...
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Serial Bus Digital Switching Characteristics Unless otherwise noted, these specifications apply for V lines = 100 pF unless otherwise specified. Boldface limits apply for T unless otherwise noted. See (Note 7)for CS voltage restriction. Symbol t SC (Serial Clock) Period ...
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Note 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. Note 2: When the input voltage (V ) ...
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TRI-STATE Test Circuit Typical Performance Characteristics www.national.com FIGURE 7. Steady State Power Supply Current vs Temperature Temperature Error vs Temperature 8 30035707 30035796 30035797 ...
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Functional Description The LM95172Q incorporates a temperature sensor and a 13- bit to 16-bit ΣΔ ADC (Sigma-Delta Analog-to-Digital Convert- er). Compatibility of the LM95172Q's three-wire serial inter- FIGURE 8. LM95172Q Functional Block Diagram face with SPI and MICROWIRE allows ...
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INITIAL SOFTWARE RESET AND POWER-UP SEQUENCES AND POWER ON RESET (POR) 1.1.1 Software Reset Sequence A software reset sequence must be followed, after the initial V and V supply voltages reach their specified DD ANALOG DD IO minimum operating ...
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ONE SHOT CONVERSION The LM95172Q features a one-shot conversion bit, which is used to initiate a singe conversion and comparison cycle when the LM95172Q is in shutdown mode. While the LM95172Q is in shutdown mode, writing a "1" to ...
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COMMUNICATING WITH THE LM95172Q The serial interface consists of three lines: CS (Chip Select), SC (Serial Clock), and the bi-directional SI/O (Serial I/O) data line. See (Note 7)for CS voltage restriction. A high-to-low transition of the CS line initiates ...
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TEMPERATURE DATA FORMAT Temperature data is represented by a 13- to 16-bit, two's complement word with a Least Significant Bit (LSB) equal to 13-Bit Resolution. First Bit (D15) is Sign, the last bit (D0) is Toggle and bits D1 ...
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Resolution. First bit (D15) is Sign and the last bit (D0) is Toggle. Temperature +175°C +150°C +80°C +25°C +0.015625°C 0°C −0.015625°C −40°C 16-Bit Resolution. First bit (D15) is Sign and the last bit (D0) is the LSB. Temperature +175°C ...
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INTERNAL REGISTER STRUCTURE The LM95172Q has four registers that are accessible by is- suing a command byte (a R/W Bit plus the register address: Control/Status and Identification. Which of HIGH LOW these registers will be ...
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Temperature Register (Read Only): Default Register D15 Sign 1°C 0.5°C 0.25°C Bit <15:1>: Temperature Data Byte. Represents the temperature that was measured by the most recent temperature conversion in two's complement form. On power-up, this data ...
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Control/Status Register (Read/Write) Pointer Address: 81h (Read); 01h (Write) D15 D14 D13 SD One-Shot OVERTEMP Reset D7 OVERTEMP Disable OVERTEMP POL Bit <15>: Shutdown (SD) Bit. Writing a “1” to this bit and holding it high for at least ...
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T : Upper Limit Register HIGH (Read/Write) Pointer Address: 82h (Read); 02h (Write) D15 D14 Sign 128° 1°C 0.5°C Bit <15:5>: Upper-Limit Temperature byte. If the measured temperature, stored in the temperature register, exceeds this user- programmable ...
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NOISE IMMUNITY OF THE SERIAL I/O (SI/O) AND SERIAL CLOCK (SC) LINES The LM95172Q's Serial I/O and Serial Clock lines have high noise immunity making it an excellent choice in challenging electromagnetic environments. Some typical bench tests, taken at ...
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Typical Applications FIGURE 15. Temperature monitor using Intel 196 processor FIGURE 16. LM95172Q digital input control using microcontroller's general purpose I/O. www.national.com 30035720 30035719 20 ...
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Physical Dimensions For Bond Pad Mechanical Dimensions, see Connection Diagram Section 30035702 Order Number LM95172QA2 MDA Die Form Orientation of Die Surf Tape 21 30035723 www.national.com ...
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Dimensions of Surf Tape Transport Media. Use Option 01. www.national.com 22 30035799 ...
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Notes 23 www.national.com ...
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For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo ...