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Texas Instruments TMP275AIDGKR
- Part No.:
- TMP275AIDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TMP275AIDGKR.pdf
- Description:
- SENSOR DIGITAL -40C-125C 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,894
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Product details
Overview
TMP275AIDGKR from Texas Instruments is a ±0.5°C accurate digital temperature sensor IC with 12-bit ΔΣ ADC, I²C/SMBus interface, and programmable resolution (9–12 bits), operating from 2.7 V to 5.5 V in VSSOP-8 package. It delivers 0.0625°C resolution at 12-bit mode and supports thermostat control via ALERT pin for thermal protection in power supplies and embedded systems.
For engineers reviewing the TMP275AIDGKR datasheet, TMP275AIDGKR pinout, TMP275AIDGKR application, or TMP275AIDGKR equivalent, key selection considerations include its ±0.5°C accuracy from −20°C to 100°C, 50 µA typical quiescent current, 8 configurable I²C addresses, SMBus Alert support, and LM75-form-factor pin compatibility for drop-in replacement in legacy thermal monitoring designs.
Technical Context
The TMP275AIDGKR integrates an on-die temperature-sensing element with a delta-sigma ADC and digital control logic, enabling direct conversion of junction temperature to calibrated digital output without external components. Its internal oscillator drives conversion timing, and register-mapped configuration allows runtime adjustment of resolution, shutdown, and thermostat thresholds.
It operates as an I²C/SMBus slave device with open-drain SDA/SCL pins featuring Schmitt triggers and spike suppression. The ALERT pin functions in comparator or interrupt mode, latching overtemperature events until cleared by host read - supporting both thermal warning and autonomous system shutdown in industrial and computing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy | ±0.5°C max from −20°C to 100°C - enables precise thermal compensation without system-level calibration |
| Resolution | User-selectable 9–12 bits (0.5°C to 0.0625°C) - balances conversion speed (27.5 ms at 9-bit) and precision |
| Supply Voltage | 2.7 V to 5.5 V - compatible with 3.3 V and 5 V logic domains and mixed-voltage systems |
| Quiescent Current | 50 µA typical (active), 0.1 µA standby - extends battery life in portable and low-power IoT sensors |
| I²C Address Options | 8 unique addresses via A0/A1/A2 pins - supports multi-sensor bus topology without address conflict |
| Operating Range | −40°C to +125°C - suitable for automotive under-hood, server, and industrial control environments |
| Interface Standard | Fully compatible with I²C Fast Mode (400 kHz) and SMBus High-Speed Mode (2.38 MHz) - ensures interoperability with modern microcontrollers |
Pinout & Package
VSSOP-8 package (3.00 mm × 3.00 mm), thin-profile surface-mount, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SDA | Serial Data I/O | Open-drain bidirectional data line; requires external pullup; supports I²C/SMBus protocol framing and ACK/NACK |
| 2 - SCL | Serial Clock Input | Open-drain clock input; synchronized with SDA transitions; determines maximum bus speed (up to 2.38 MHz) |
| 3 - ALERT | Overtemperature Output | Open-drain active-low interrupt/comparator output; configurable for TM=0 (latched) or TM=1 (cleared on temp register read) |
| 4 - GND | Ground Reference | Analog and digital ground return; must be connected to system PCB ground plane for thermal and noise integrity |
| 5 - A2 | I²C Address Select | Digital input; sets MSB of 7-bit slave address (1001xxx); tied to GND or V+ to configure one of eight addresses |
| 6 - A1 | I²C Address Select | Digital input; sets middle bit of slave address; used with A0/A2 for full 3-bit address encoding |
| 7 - A0 | I²C Address Select | Digital input; sets LSB of slave address; enables up to eight TMP275AIDGKR devices on same bus |
| 8 - V+ | Power Supply | Single supply input (2.7–5.5 V); powers analog core, ADC, digital logic, and interface drivers; bypass capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| LM75 form-factor pinout & register map | Enables direct replacement of LM75, TMP75, TMP175 in existing layouts without PCB revision |
| Programmable resolution (9–12 bits) | Allows trade-off between measurement precision (0.0625°C) and conversion time (220–300 ms at 12-bit) |
| SMBus Alert response | Supports multi-device arbitration on shared bus; returns slave address and alert cause (THIGH/TLOW) upon SMBus Alert command |
| One-shot conversion mode | Triggers single measurement from shutdown state, then auto-returns to 0.1 µA standby - ideal for event-driven sensing |
| No power-up sequence requirement | Two-wire pullups may be enabled before V+ application - simplifies power sequencing in complex systems |
Applications
| Power-Supply Thermal Monitoring | Server CPU/GPU Thermal Protection |
|---|---|
Use Scenario: Real-time temperature tracking of DC-DC converter MOSFETs and inductors to prevent thermal runaway. IC Role / Device Role / Timing Role: Digital temperature sensor providing calibrated 12-bit readings every 100–500 ms via I²C to PMBus controller. Use Value: ±0.5°C accuracy ensures early detection of 5°C rise before thermal throttling threshold, reducing risk of catastrophic failure. |
Use Scenario: Distributed thermal sensing across motherboard VRMs, memory modules, and chipset heatsinks. IC Role / Device Role / Timing Role: I²C slave device with ALERT pin wired to system management controller (SMC) for hardware-triggered shutdown. Use Value: 8-address capability allows 6+ sensors per bus; SMBus Alert enables rapid fault isolation without polling overhead. |
| Battery Pack Temperature Management | Industrial PLC Environmental Sensing |
Use Scenario: Monitoring Li-ion cell stack temperature during charge/discharge cycles in portable medical devices. IC Role / Device Role / Timing Role: Low-power temperature node operating in one-shot mode, triggered by MCU every 2 seconds. Use Value: 0.1 µA shutdown current extends battery life; ±1°C accuracy over −40°C to 125°C covers full operational envelope. |
Use Scenario: Ambient and enclosure temperature logging in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Standalone sensor interfacing to ARM-based PLC CPU via isolated I²C level shifter. Use Value: VSSOP-8 footprint minimizes PCB area; no external components reduces BOM count and field failure modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital temperature sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMP117MDSGR | Higher accuracy (±0.1°C), 16-bit resolution, integrated EEPROM, but 1.71–3.6 V supply only | Requires voltage translation in 5 V systems; better suited for precision lab equipment than industrial power supplies | Select TMP117MDSGR only if sub-0.2°C accuracy and factory calibration traceability are mandatory |
| LMT70YFQR | Analog output (ratiometric voltage), 0.1°C typical accuracy, 1.4–3.6 V supply, no digital interface | Needs external ADC and I²C bridge; higher system-level design effort but lower cost per node | Choose LMT70YFQR when analog signal chain already exists and digital bus loading must be avoided |
Compared with TMP275AIDGKR, TMP117MDSGR offers superior metrology but narrower voltage range and higher cost, while LMT70YFQR trades digital convenience for analog simplicity and lower component count - making TMP275AIDGKR the optimal balance of accuracy, interface flexibility, and 2.7–5.5 V robustness for mainstream embedded thermal management.
Availability
TMP275AIDGKR is available at Aetrix Electronics and suitable for power-supply thermal monitoring, server thermal protection, and battery management requiring stable component supply across industrial, computing, and automotive-tier production programs.
Supply support for TMP275AIDGKR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of leadership in precision sensing and industrial-grade IC design.
The TMP275AIDGKR belongs to TI's high-accuracy digital temperature sensor product line, engineered specifically for reliable, calibration-free thermal monitoring in space-constrained, noise-sensitive applications such as power management and computing infrastructure.
FAQ
What is the accuracy specification of the TMP275AIDGKR over its full operating temperature range?
The TMP275AIDGKR achieves ±0.5°C maximum accuracy from −20°C to +100°C and ±1°C maximum from −40°C to +125°C. This is factory-calibrated and does not require system-level compensation. At 25°C, typical error is ±0.0625°C. These values are specified under recommended operating conditions (V+ = 2.7–5.5 V) and verified across production lots per SBOS363F datasheet Section 6.5.
Does the TMP275AIDGKR support I²C Fast Mode Plus (1 MHz) or only standard Fast Mode (400 kHz)?
The TMP275AIDGKR supports I²C Fast Mode (up to 400 kHz) and SMBus High-Speed Mode (up to 2.38 MHz), but not Fast Mode Plus (1 MHz). Its timing specifications in Section 6.6 confirm t(LOW) ≥ 1300 ns and t(HIGH) ≥ 600 ns at 400 kHz, and it complies with SMBus v2.0 timing for high-speed operation. Operation above 400 kHz requires Hs-mode master code initiation per Section 7.3.4.5.
Can the TMP275AIDGKR be used as a direct replacement for the LM75 in an existing design?
Yes - the TMP275AIDGKR is explicitly designed as a pin-compatible and register-compatible upgrade to the LM75, TMP75, TMP75B, and TMP175. It shares identical SOIC-8 and VSSOP-8 footprints, identical pin functions (SDA, SCL, OS/ALERT, GND, A0–A2, V+), and identical register map layout, enabling drop-in replacement without PCB or firmware changes.
How does the ALERT pin behave in Comparator Mode versus Interrupt Mode on the TMP275AIDGKR?
In Comparator Mode (TM = 0), the ALERT pin activates when temperature ≥ THIGH and remains asserted until temperature falls below TLOW. In Interrupt Mode (TM = 1), ALERT asserts on crossing either THIGH or TLOW and clears automatically when the host reads the temperature register. Both modes use the same open-drain output requiring external pullup, and behavior is configured via the Configuration Register's TM bit.
What is the minimum conversion time for the TMP275AIDGKR at 9-bit resolution, and how is it triggered?
The minimum conversion time for the TMP275AIDGKR at 9-bit resolution is 27.5 ms (typical), with max 37.5 ms. Conversion is initiated automatically in continuous mode or manually via One-Shot (OS) bit write when in shutdown. The OS bit is self-clearing after conversion completion, returning the device to 0.1 µA standby - ideal for ultra-low-power periodic sensing.
TMP275AIDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Sensor Type:
- Digital, Local
- Sensing Temperature - Local:
- -40°C ~ 125°C
- Sensing Temperature - Remote:
- -
- Output Type:
- SMBus
- Voltage - Supply:
- 2.7V ~ 5.5V
- Resolution:
- 11 b
- Features:
- One-Shot, Output Switch, Programmable Resolution, Shutdown Mode, Standby Mode
- Accuracy - Highest (Lowest):
- ±0.5°C (±1.5°C)
- Test Condition:
- -20°C ~ 100°C (25°C ~ 100°C)
- Operating Temperature:
- -55°C ~ 127°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-VSSOP
TMP275AIDGKR FAQ
1.How can I place an order for TMP275AIDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP275AIDGKR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TMP275AIDGKR reliable?
The price and inventory of TMP275AIDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP275AIDGKR is usually 5 days.
3.What payment methods are accepted for TMP275AIDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP275AIDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP275AIDGKR?
TMP275AIDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP275AIDGKR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TMP275AIDGKR?
For technical support, including TMP275AIDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP275AIDGKR requirements.
6.How does Aetrix verify that TMP275AIDGKR is sourced from the original manufacturer or authorized distributors?
All TMP275AIDGKR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TMP275AIDGKR meets industry standards.
7.What is the process for return or replacement of TMP275AIDGKR?
All TMP275AIDGKR units undergo pre-shipment inspection (PSI). If there is an issue with TMP275AIDGKR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TMP275AIDGKR part is unused and in its original packaging.
Return procedure for TMP275AIDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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