Part: TMP1075 from Texas Instruments

Type: Digital Temperature Sensor

Description: The TMP1075 is a highly accurate, low-power digital temperature sensor with I²C and SMBus interface, offering ±1°C maximum accuracy from -40°C to 110°C, a 1.62–5.5 V supply range, and 12-bit resolution.

Operating Conditions:

• Supply voltage: 1.62–5.5 V
• Operating temperature: -55 to 125 °C
• Max SCL operating frequency: 2.56 MHz (High-speed mode, TMP1075) / 2.85 MHz (High-speed mode, TMP1075N)
• Temperature resolution: 0.0625 °C

Absolute Maximum Ratings:

• Max supply voltage: 6.5 V (TMP1075) / 4 V (TMP1075N)
• Max junction temperature: 150 °C
• Max storage temperature: 130 °C

Key Specs:

• Temperature accuracy: ±1°C (maximum) from -40°C to 110°C
• Temperature accuracy: ±2°C (maximum) from -55°C to 125°C
• Resolution: 0.0625 °C (12-bit)
• Quiescent current (serial bus inactive, R1=1, R0=1): 2.7 μA (typical)
• ADC Conversion time (one-shot mode, R1=0, R0=0): 5.5 ms (typical)
• Operating voltage range: 1.7 V to 5.5 V (TMP1075) / 1.62 V to 3.6 V (TMP1075N)
• SCL operating frequency: Up to 2.56 MHz (TMP1075) / Up to 2.85 MHz (TMP1075N)
• Input capacitance: 5 pF (typical)

Features:

• Temperature accuracy: ±0.25°C (typical) from -55°C to 125°C
• Low power consumption: 2.7μA Average current, 0.37μA Shutdown current
• Supply range options from: 1.62V to 5.5V
• Digital interface: SMBus, I²C
• Software compatibility with industry standard LM75 and TMP75
• Supports up to 32 I2C addresses
• ALERT pin function
• NIST traceability

Applications:

• Power-supply temperature monitoring
• Connected peripherals & printers
• PC and notebooks
• Mobile phones
• Battery management
• Enterprise machine
• Thermostat
• Wireless environmental sensor and HVAC
• Electro mechanical device temperature

Package:

• VSSOP (DGK, 8)
• SOIC (D, 8)
• WSON (DSG, 8)
• SOT563 (DRL, 6)

• Temperature accuracy:
  • ±0.25°C (typical) from -55°C to 125°C
  • ±1°C (maximum) from -40 °C to 110°C
  • ±2°C (maximum) from -55°C to 125°C
• Low power consumption:
  • 2.7μA Average current
  • 0.37μA Shutdown current
• Supply range options from: 1.62V to 5.5V
• Temperature independent of supply
• Digital interface: SMBus, I²C
• Software compatibility with industry standard LM75 and TMP75
• Can coexist in I³C mixed fast mode bus
• Resolution: 12 Bits
• Supports up to 32 I2C addresses
• ALERT pin function
• NIST traceability

• Power-supply temperature monitoring
• Connected peripherals & printers
• PC and notebooks
• Mobile phones
• Battery management
• Enterprise machine
• Thermostat
• Wireless environmental sensor and HVAC
• Electro mechanical device temperature

3 Description

The TMP1075 is the most accurate and lowest power replacement to the industry standard LM75 and TMP75 digital temperature sensors. Available in SOIC-8, VSSOP-8, WSON-8, and SOT563-6 packages, the TMP1075 offers pin-to-pin and software compatibility to quickly upgrade any existing xx75 design. The TMP1075 additional new packages are a 2.0mm × 2.0mm DFN and a 1.6mm × 1.6mm SOT563-6 reducing the printed circuit board (PCB) footprint by 82% and 89% compared to the SOIC package, respectively.

The TMP1075 has a ±1°C accuracy over a wide temperature range and offers an on-chip 12bit analog-to-digital converter (ADC) providing a temperature resolution of 0.0625°C.

Compatible with two-wire SMBus and I²C interfaces, the TMP1075 support up to 32 device addresses and provides SMBus Reset and Alert function.

The TMP1075 D, DGK, and DSG packages are specified for operation over a temperature range of -55°C to 125°C and the TMP1075N DRL package is specified over the -40°C to 125°C temperature range.

The TMP1075 units are 100% tested on a production setup that is NIST traceable and verified with equipment that is calibrated to ISO/IEC 17025 accredited standards.

Package Information

• For more information, see Section 11.
• The package size (length × width) is a nominal value and (2) includes pins, where applicable.
• Available as the TMP1075N orderable.

Simplified Schematic

DGK and D packages

Temperature Accuracy

TMP1075 VSSOP-8 (DGK) Pinout

Notes

• Package: VSSOP-8 (DGK) — 3.00mm × 4.90mm
• I²C/SMBus Interface: SDA and SCL pins feature integrated spike suppression filters and Schmitt triggers
• Address Pins: A0, A1, A2 allow up to 32 device addresses on a single bus (can be tied to GND, V+, SDA, or SCL)
• ALERT Pin: Open-drain output; active low when temperature exceeds THIGH or falls below TLOW (in interrupt mode)
• Supply Range: 1.7V to 5.5V for TMP1075; 1.62V to 3.6V for TMP1075N
• Operating Temperature: TMP1075: −55°C to 125°C; TMP1075N: −40°C to 125°C
• Pin numbers extracted from DGK package diagram (Figure 5-2) and matched with Table 5-1 pin functions

at TA = –55°C to +125°C and V+ = 1.7 V to 5.5 V (unless noted); typical specification are at TA = 25°C and V+=3.3 V

at TA = –55°C to +125°C and V+ = 1.7 V to 5.5 V (unless noted); typical specification are at TA = 25°C and V+=3.3 V

• (1) Repeatability is the ability to reproduce a reading when the measured temperature is applied consecutively, under the same conditions.
• (2) One-shot mode setup, 1 sample per minute for 24 hours.
• (3) Long-term drift is determined using accelerated operational life testing at a junction temperature of 150°C.

over operating free-air temperature range (unless otherwise noted)(1)

⁽¹⁾ Operation outside the Absolute Maximum Ratings may cause permanent device damage. Absolute Maximum Ratings do not imply functional operation of the device at these or any other conditions beyond those listed under Recommended Operating Conditions. If used outside the Recommended Operating Conditions but within the Absolute Maximum Ratings, the device may not be fully functional, and this may affect device reliability, functionality, performance, and shorten the device lifetime.

over operating free-air temperature range (unless otherwise noted)

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⁽¹⁾ For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.

The TMP1075 can measure the PCB temperature of the location where the user mounts the device. The TMP1075 features two-wire SMBus and I2C interface compatibility, with the TMP1075 allowing up to 32 (TMP1075N: 4) devices on one bus. The TMP1075 requires a pullup resistor on the SDA pin, and if needed, on the SCL and ALERT pins. A 0.01-μF bypass capacitor is also required (see Figure 8-1 ).

• For more information, see Section 11.
• The package size (length × width) is a nominal value and (2) includes pins, where applicable.
• Available as the TMP1075N orderable.