NST175H-QMSR

NST175 0.5°C Accurate Temperature Sensor with I2C and SMBus Interface NOVOSENSE Datasheet 1.21 ⚫ Features： ⚫ Description The NST175 is a lower power, higher accuracy digital temperature sensors ideal for negative temperature coefficient (NTC) and positive temperature coefficient (PTC) thermistor replacement. NST175 Compatible with two-wire SMBus and I2C interfaces, supports up to 27 devices address and provides SMBus Reset and Alert function. The NST175 also feature a SMBus Alert function. The devices offer a typical accuracy of 0.5 °C without requiring calibration or external component signal conditioning. The NST175 temperature sensors are highly linear and do not require complex calculations or look-up tables to derive the temperature. The on-chip 12bit analog-to-digital converter (ADC) offers resolutions down to 0.0625°C. NST175 device works over a temperature range of –55°C to 125°C, which makes it suitable for onboard and off board applications in automotive, industrial, and consumer markets. The NST175 is very low power device, which can be applied in IoT. The NST175 is available in an SOIC-8 package and an MSOP-8 package. ➢ High Accuracy Over –55°C to 125°C Wide Temperature Range ✓ -20 °C ~ 85 °C :  0.5 °C (Typical) ✓ -20 °C ~ 85 °C :  1 °C (Maximum) ✓ -55 °C ~-20 °C:  2 °C (Maximum) ✓ 85 °C ~125 °C:  2 °C (Maximum) ➢ Proportional to Temperature 0.0625°C Resolution with ➢ Power up Defaults Permit Stand-Alone Operation as Thermostat ➢ Supports up to 27 Device Addresses ➢ Supply Operation range from 1.62V to 5.5V ➢ Operating current: 30uA(Typical) ➢ Shutdown current: 0.1μA (Typical) ➢ Digital Interface: SMBus, I2C ➢ Package ⚫ Applications ✓ MSOP(8) (3mm x 3mm) ✓ SOIC(8)（4.9mm x 3.91mm） ➢ General System Thermal Management ➢ Computer Peripheral Thermal Protection Typical Application ➢ Notebook Computers ➢ Industrial Internet of Things (IoT) ➢ Communications Infrastructure ➢ Power-system monitors ➢ Thermal protection ➢ Environmental Monitoring and HVAC Novosense Confidential Page 1 NST175 Idenx 1.0 ABSOLUTE MAXIMUM RATINGS............................................................................................................................... 3 2.0 ELECTRICAL CHARACTERISTICS ............................................................................................................................ 3 2.1. 2.2. 2.3. 3.0 ELECTRICAL CHARACTERISTICS ........................................................................................................................................ 3 I2C TIMING DIAGRAM ....................................................................................................................................................... 5 I2C TIMING CHARACTERISTICS .......................................................................................................................................... 5 TYPICAL CHARACTERISTICS .................................................................................................................................... 6 4.0 FUNCTION DESCRIPTION ................................................................................................................................................. 7 4.1. FUNCTION DESCRIPTION .................................................................................................................................................... 7 4.2. FEATURE DESCRIPTION ..................................................................................................................................................... 7 4.2.1 Digital Temperature Sensor ...................................................................................................................................... 7 4.2.2 Serial Interface .......................................................................................................................................................... 8 4.2.3 I2C Timing Diagram ............................................................................................................................................... 11 4.3 DEVICE FUNCTIONAL MODES ......................................................................................................................................... 14 4.3.1 Shutdown Mode (SD) ............................................................................................................................................. 14 4.3.2 One-shot (OS) ......................................................................................................................................................... 14 4.3.3 Thermostat Mode (TM) .......................................................................................................................................... 14 4.4 PROGRAMMING ............................................................................................................................................................... 14 4.4.1 Pointer Register ...................................................................................................................................................... 14 4.4.2 Temperature Register .............................................................................................................................................. 15 4.4.3 Configuration Register........................................................................................................................................... 16 5.0 TYPICAL APPLICATION ................................................................................................................................................... 20 5.1 APPLICATION INFORMATION ................................................................................................................................................. 20 5.2 TYPICAL APPLICATION ..................................................................................................................................................... 20 6.0 PACKAGE INFORMATION ............................................................................................................................................... 21 6.1 PINOUT DESCRIPTION ............................................................................................................................................................ 21 6.2 MSOP（8） PACKAGE ......................................................................................................................................................... 22 6.3 SOP（8） PACKAGE ............................................................................................................................................................ 23 7.0 ORDER INFORMATION ............................................................................................................................................... 24 8.0 REVISION HISTORY .......................................................................................................................................................... 25 Novosense Confidential Page 2 NST175 1.0 ABSOLUTE MAXIMUM RATINGS Parameters Symbol Min VDD -0.3 6.5 V Voltage at A0, A1and A2 Pins A0，A1，A2 -0.3 6.5 V Voltage at OS, SCL and SDA Pins ALERT,SCL, SDA -0.3 6.5 V -60 155 ℃ -55 125 ℃ 155 ℃ Supply Voltage Pin (VDD) Storage temperature Operation temperature TBoperation Typ Max Maximum junction temperature ESD susceptibility Unit HBM ±5 KV CDM ±1 KV Comments 2.0 ELECTRICAL CHARACTERISTICS 2.1. Electrical characteristics Parameters Symbol Min Typ Max Unit Supply voltage Range VDD 1.62 3.3 5.5 V Pull up resistor Range Rpu 0.5 5 10 KΩ Comments Supply 16 Supply sensitivity Operation current Iconv 30 Shutdown current ISD ISD m℃/ V 60 uA Conversion 0.1 uA Serial bus inactive 10 uA Serial bus active, SCL frequency = 400 kHz Temperature Range and Resolution Temperature Range -55 ℃ ℃ 0.0625 Resolution Accuracy 125 1 ℃ From -20℃ to 85℃ 2 2 ℃ From -50℃ to -20℃ 2 2 ℃ From 85℃ to125℃ -1 0.5 Novosense Confidential Page 3 NST175 Conversion time TCONV 24 ALERT Output Saturation Voltage ALERT Delay 1 32 ms For VDD