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Texas Instruments TMP275AIDRG4
- Part No.:
- TMP275AIDRG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TMP275AIDRG4.pdf
- Description:
- SENSOR DIGITAL -40C-125C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,727
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Product details
Overview
TMP275AIDRG4 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 over −40°C to +125°C. It functions as a self-contained thermal monitoring device in power supplies, servers, and battery management systems without external components.
For engineers reviewing the TMP275AIDRG4 datasheet, TMP275AIDRG4 pinout, TMP275AIDRG4 application, or TMP275AIDRG4 equivalent, key selection criteria include its LM75-compatible SOIC-8 pinout, ±0.5°C accuracy from −20°C to 100°C, 50 µA typical quiescent current, and SMBus Alert functionality for multi-device thermal event handling.
Technical Context
The TMP275AIDRG4 integrates a precision bandgap temperature sensor, 12-bit delta-sigma ADC, on-chip oscillator, and fully compliant I²C/SMBus slave interface with open-drain SDA/SCL/ALERT pins. Its register-mapped architecture includes Temperature, Configuration, THIGH, TLOW, and Pointer registers accessible via two-wire protocol.
It supports three functional modes-continuous conversion, shutdown (0.1 µA standby), and one-shot-with configurable thermostat behavior (comparator or interrupt mode) and hardware address selection via A0–A2 pins enabling up to eight devices on one bus.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy | ±0.5°C max from −20°C to 100°C; enables precise thermal protection without system-level calibration |
| Resolution | User-selectable 9–12 bits (0.5°C to 0.0625°C); balances conversion speed vs. precision per application need |
| Supply Range | 2.7 V to 5.5 V; interoperable with 3.3 V and 5 V logic domains without level shifting |
| Quiescent Current | 50 µA typical (serial bus inactive); supports low-power embedded monitoring |
| Interface | I²C/SMBus compatible, up to 2.38 MHz high-speed mode; ensures compatibility with legacy and modern controllers |
| Operating Temp | −40°C to +125°C; qualified for industrial and automotive under-hood environments |
| Alert Output | Open-drain ALERT pin with SMBus Alert response; enables hardware-triggered thermal interrupts without polling |
Pinout & Package
Package: SOIC-8 (4.90 mm × 3.91 mm), RoHS-compliant, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SDA | Serial data I/O | Open-drain bidirectional bus line; requires external pullup; supports I²C/SMBus read/write transactions |
| 2 - SCL | Serial clock input | Open-drain clock input; synchronizes data transfer; accepts up to 2.38 MHz high-speed mode clocks |
| 3 - ALERT | Overtemperature alert output | Open-drain active-low interrupt; asserts when temp ≥ THIGH or ≤ TLOW; responds to SMBus Alert command |
| 4 - GND | Ground reference | Analog/digital common return; must be low-impedance for ADC accuracy and noise immunity |
| 5 - A2 | Address select input | Binary MSB of 3-bit hardware address; sets one of eight possible I²C addresses (1001xxx) |
| 6 - A1 | Address select input | Binary middle bit of 3-bit hardware address; latched at reset or bus start |
| 7 - A0 | Address select input | Binary LSB of 3-bit hardware address; enables multi-sensor bus topology without software reconfiguration |
| 8 - V+ | Power supply input | Single 2.7–5.5 V supply; powers internal ADC, logic, and interface; no power-up sequencing required |
Key Features
| Feature | Design Value |
|---|---|
| LM75 pin- and register-compatible | Direct drop-in replacement for legacy LM75, TMP75, TMP175 in existing SOIC-8 layouts and firmware |
| Programmable resolution (9–12 bits) | Reduces conversion time from 27.5 ms (9-bit) to 300 ms (12-bit), optimizing response latency vs. precision trade-off |
| SMBus Alert response | Enables master to identify alerting device via slave address on shared bus-no polling or dedicated IRQ lines needed |
| Shutdown mode (0.1 µA) | Extends battery life in portable equipment; device wakes on one-shot command or bus activity |
| No external components required | Eliminates calibration resistors, thermistors, or op-amps-reduces BOM count and layout area |
Applications
| Power-Supply Thermal Monitoring | Server Rack Temperature Management |
|---|---|
Use Scenario: Real-time die temperature tracking of DC-DC converters and VRMs in telecom and computing power supplies. IC Role / Device Role / Timing Role: Primary temperature sensing element feeding thermal loop feedback; provides 12-bit resolution readings every 220–300 ms. Use Value: Enables dynamic fan control and overtemperature shutdown before MOSFET thermal runaway occurs. | Use Scenario: Distributed thermal sensing across CPU, memory, and PSU zones in 1U/2U rack-mounted servers. IC Role / Device Role / Timing Role: Slave node on shared I²C bus; uses A0–A2 addressing to assign unique IDs to up to eight sensors per controller. Use Value: Reduces wiring complexity and host GPIO count versus analog thermistor networks; supports SMBus Alert for rapid fault isolation. |
| Battery Pack Safety Monitoring | Office Equipment Thermal Protection |
Use Scenario: Cell-level temperature supervision in Li-ion battery packs for laptops and UPS systems. IC Role / Device Role / Timing Role: Standby-mode sensor activated periodically via one-shot command; alerts host if cell temp exceeds 60°C. Use Value: Cuts average current to <1 µA during idle periods while retaining fast-response thermal interrupt capability. | Use Scenario: Overheat detection in laser printers, copiers, and multifunction peripherals with high-power fuser assemblies. IC Role / Device Role / Timing Role: Comparator-mode ALERT output wired to microcontroller interrupt pin; triggers immediate power-down on fuser temp >120°C. Use Value: Prevents mechanical damage and fire hazard without requiring continuous MCU polling or ADC sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital temperature sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMP75AIDR | Same pinout, register map, and accuracy (±0.5°C), but lower max operating temp (−25°C to +100°C); no 125°C rating | Not suitable for industrial or automotive under-hood use where full −40°C to +125°C range is required | Select TMP275AIDRG4 when extended temperature qualification and long-term drift (±0.0625°C) are critical |
| LMT70YFQR | Higher accuracy (±0.1°C typ), smaller DSBGA package, but analog output only; requires external ADC and calibration | Demands additional signal conditioning circuitry and MCU resources; not a direct digital interface replacement | Choose TMP275AIDRG4 for plug-and-play I²C integration, reduced layout complexity, and guaranteed system-level accuracy |
Compared with TMP75AIDR and LMT70YFQR, TMP275AIDRG4 uniquely delivers LM75-compatible digital operation across the full industrial temperature range with factory-calibrated accuracy, eliminating both external components and post-assembly calibration effort.
Availability
TMP275AIDRG4 is available at Aetrix Electronics and suitable for power-supply thermal monitoring, server rack management, and battery pack safety applications requiring stable component supply and long-lifecycle support.
Supply support for TMP275AIDRG4 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 sensor design heritage.
The TMP275AIDRG4 belongs to TI's precision analog temperature sensor product line, engineered for high-accuracy, low-power, and drop-in replaceability in thermal management systems across industrial, computing, and consumer electronics.
FAQ
What is the maximum operating temperature range specified for the TMP275AIDRG4?
The TMP275AIDRG4 is specified from −40°C to +125°C, with absolute maximum ratings extending to −55°C to +127°C. This full industrial range is validated per JEDEC JESD22-A108 and supported by thermal metrics including RθJA = 120°C/W (SOIC-8). The device maintains ±0.5°C accuracy from −20°C to 100°C and ±1°C from −40°C to 125°C, making TMP275AIDRG4 suitable for demanding environments like server PSUs and automotive ECUs.
Does the TMP275AIDRG4 require external components for basic temperature measurement?
No, the TMP275AIDRG4 requires no external components for core temperature sensing functionality. It integrates a calibrated bandgap sensor, 12-bit ΔΣ ADC, oscillator, and I²C interface. Only two external 4.7-kΩ pullup resistors on SDA and SCL-and an optional 0.01-µF bypass capacitor on V+-are recommended per TI's layout guidelines. This eliminates thermistors, op-amps, or calibration resistors, reducing BOM cost and PCB area while ensuring TMP275AIDRG4 delivers factory-trimmed accuracy out of the box.
How many unique I²C addresses does the TMP275AIDRG4 support, and how are they configured?
The TMP275AIDRG4 supports eight unique I²C slave addresses (1001000b to 1001111b) via hardware-configurable A0, A1, and A2 pins. Each pin accepts GND or V+ to set its logic level; the resulting 3-bit value forms the LSBs of the 7-bit address. Address latching occurs at power-on reset or bus START condition, enabling reliable multi-sensor bus topology. This allows up to eight TMP275AIDRG4 devices on a single I²C bus without address conflicts or software reconfiguration.
What are the power consumption characteristics of the TMP275AIDRG4 in active and shutdown modes?
In active continuous-conversion mode with serial bus inactive, TMP275AIDRG4 draws 50 µA typical (85 µA max). During I²C communication at 400 kHz, current rises to 100 µA; at 3.4 MHz, it reaches 410 µA. In shutdown mode, current drops to 0.1 µA typical (3 µA max), and one-shot mode consumes only the energy of a single conversion before returning to shutdown. These values are measured across −40°C to +125°C and 2.7–5.5 V supply, confirming TMP275AIDRG4's suitability for battery-powered thermal monitoring.
Is the TMP275AIDRG4 pin-compatible with the LM75 and other TI temperature sensors?
Yes, the TMP275AIDRG4 is fully pin- and register-compatible with the LM75, TMP75, TMP75B, and TMP175 in SOIC-8 and VSSOP-8 packages. Its pinout (SDA, SCL, ALERT, GND, A2, A1, A0, V+) matches LM75 exactly, and its internal register map-including Temperature, Configuration, THIGH, TLOW, and Pointer registers-is identical. Firmware written for LM75 will operate unchanged with TMP275AIDRG4, delivering improved accuracy (±0.5°C vs. ±2°C) and extended temperature range without hardware or software modification.
TMP275AIDRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-SOIC
TMP275AIDRG4 FAQ
1.How can I place an order for TMP275AIDRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP275AIDRG4 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 TMP275AIDRG4 reliable?
The price and inventory of TMP275AIDRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP275AIDRG4 is usually 5 days.
3.What payment methods are accepted for TMP275AIDRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP275AIDRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP275AIDRG4?
TMP275AIDRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP275AIDRG4 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 TMP275AIDRG4?
For technical support, including TMP275AIDRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP275AIDRG4 requirements.
6.How does Aetrix verify that TMP275AIDRG4 is sourced from the original manufacturer or authorized distributors?
All TMP275AIDRG4 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 TMP275AIDRG4 meets industry standards.
7.What is the process for return or replacement of TMP275AIDRG4?
All TMP275AIDRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TMP275AIDRG4, 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 TMP275AIDRG4 part is unused and in its original packaging.
Return procedure for TMP275AIDRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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