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Texas Instruments TMP175AIDGKT
- Part No.:
- TMP175AIDGKT
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TMP175AIDGKT.pdf
- Description:
- SENSOR DIGITAL -40C-125C 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,390
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Product details
Overview
TMP175AIDGKT from Texas Instruments is a digital temperature sensor with I²C/SMBus interface, designed for precision thermal monitoring in embedded systems. It delivers ±1 °C typical accuracy from −40 °C to +125 °C, 9–12-bit user-selectable resolution (down to 0.0625 °C), and operates from 2.7 V to 5.5 V. Its 8-pin VSSOP package supports up to 27 devices on one bus and integrates an open-drain ALERT output for overtemperature event signaling in power-supply and battery management applications.
For engineers reviewing the TMP175AIDGKT datasheet, TMP175AIDGKT pinout, TMP175AIDGKT application, or TMP175AIDGKT equivalent, key selection criteria include SMBus Alert compatibility, 27-device address scalability, standby current of 0.1 μA, 125 °C max operating temperature, and LM75-form-factor drop-in capability for thermistor replacement in space-constrained thermal protection circuits.
Technical Context
The TMP175AIDGKT implements a ΔΣ ADC with diode-based on-die temperature sensing, eliminating external signal conditioning. Its control logic supports programmable thermostat thresholds (THIGH/TLOW), interrupt mode (TM = 1), and configurable conversion timing (27.5–300 ms depending on resolution).
It features integrated spike suppression filters and Schmitt triggers on SDA/SCL, enabling robust operation at up to 2 MHz (high-speed mode) with automatic filter switching. The device latches A0/A1/A2 pin states on every bus communication, supporting dynamic address reconfiguration without reset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy | ±1 °C typical (−40 °C to +125 °C); enables direct thermistor replacement without calibration |
| Resolution | 9–12 bits user-selectable; 0.0625 °C minimum step size supports fine-grained thermal control loops |
| Supply Range | 2.7 V to 5.5 V; compatible with 3.3 V and 5 V system rails without level-shifting |
| Quiescent Current | 50 μA active, 0.1 μA standby; extends battery life in portable and always-on monitoring systems |
| Address Options | 27 unique I²C addresses via A0/A1/A2 pins (including floating states); eliminates bus contention in multi-sensor nodes |
| Alert Function | Open-drain ALERT output with SMBus Alert protocol support; enables hardware-triggered interrupt handling without polling |
| Operating Temp | −40 °C to +125 °C; qualified for industrial and automotive under-hood environments |
Pinout & Package
Package: 8-pin VSSOP (DGK), 3.00 mm × 3.00 mm body, 0.65 mm pitch - industry-standard LM75 footprint with enhanced thermal performance vs SOIC-8.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SDA) | Serial data I/O | Open-drain bidirectional line; requires external pull-up; supports I²C/SMBus read/write and general call commands |
| 2 (SCL) | Serial clock input | Open-drain clock line; accepts fast-mode (400 kHz) and high-speed mode (up to 2 MHz) timing |
| 3 (ALERT) | Overtemperature alert output | Active-low open-drain interrupt; asserts when temp ≥ THIGH or ≤ TLOW; supports SMBus Alert arbitration |
| 4 (GND) | Ground reference | Primary thermal path and analog reference; must be low-impedance connection for accuracy |
| 5 (A2) | Address select input | Logic level or floating; sampled dynamically per transaction; enables 27-address configuration for TMP175AIDGKT |
| 6 (A1) | Address select input | Same behavior as A2; floating state expands address matrix beyond binary-only combinations |
| 7 (A0) | Address select input | Same behavior as A2/A1; allows full 3-bit address flexibility including float-to-voltage detection |
| 8 (V+) | Power supply | 2.7–5.5 V input; powers internal oscillator, ADC, and interface logic; bypass capacitor required (0.01 μF) |
Key Features
| Feature | Design Value |
|---|---|
| ΔΣ ADC architecture | On-chip 12-bit converter with inherent linearity; avoids lookup tables or polynomial compensation in firmware |
| Dynamic address latching | A0/A1/A2 states read on every bus start - supports hot-plug reconfiguration without device reset |
| SMBus Alert arbitration | Hardware-level conflict resolution when multiple TMP175AIDGKT devices assert ALERT simultaneously |
| High-speed mode support | Automatic filter reconfiguration on Hs-mode master code (00001XXX); enables 2 MHz transfers without software overhead |
| Timeout recovery | Auto-reset if SCL/SDA held low >54 ms; prevents bus lockup in noisy or fault-prone environments |
Applications
| Power-Supply Temperature Monitoring | Computer Peripheral Thermal Protection |
|---|---|
Use Scenario: Real-time monitoring of DC-DC converter MOSFET and inductor temperature during load transients. IC Role / Device Role / Timing Role: Digital temperature sensor providing 12-bit readings every 220 ms (12-bit mode) to host MCU via I²C for thermal derating decisions. Use Value: Enables adaptive fan control and voltage scaling before thermal shutdown, leveraging ±1 °C accuracy across −40 °C to +125 °C range. | Use Scenario: Overtemperature cutoff for USB-C docking station port controllers and display interface ICs. IC Role / Device Role / Timing Role: ALERT pin directly drives enable/disable logic of power switches; no MCU polling required. Use Value: Hardware-level response <10 ms after threshold breach, meeting USB PD thermal safety requirements without firmware latency. |
| Notebook Computers | Battery Management Systems |
Use Scenario: CPU/GPU proximity sensing and keyboard zone thermal mapping in ultra-thin chassis. IC Role / Device Role / Timing Role: Compact 3 mm × 3 mm VSSOP sensor placed near heat sources; communicates via shared SMBus with EC. Use Value: 27-address capability allows 5+ sensors on single bus without address conflicts, reducing BOM count and routing complexity. | Use Scenario: Cell-level temperature monitoring in 2–4S Li-ion packs for smart chargers and portable tools. IC Role / Device Role / Timing Role: Low-power 0.1 μA standby mode minimizes self-discharge during storage; wakes on I²C poll. Use Value: Extends shelf life by >15% vs higher-quiescent alternatives, while maintaining ±1 °C accuracy critical for safe charging algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital temperature sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMP75AIDGKT | 8 I²C addresses (vs 27), NIST-traceable calibration, 20–30 ms timeout (vs 25–74 ms) | Limited multi-sensor scalability; preferred where metrology-grade traceability is mandated | Select TMP75AIDGKT only when NIST documentation is contractually required and address count ≤8 suffices |
| LM75BIMM/NOPB | Fixed 8-address space, no floating-pin support, 11-bit resolution max, ±2 °C max error | No SMBus Alert arbitration; requires external interrupt logic for multi-device alert handling | Choose LM75BIMM/NOPB for legacy LM75 drop-in where cost is primary and advanced features are unused |
Compared with TMP75AIDGKT and LM75BIMM/NOPB, the TMP175AIDGKT provides superior bus scalability and lower standby current, making it optimal for dense thermal sensor networks in battery-powered and industrial edge devices where address flexibility and microamp-level power matter.
Availability
TMP175AIDGKT is available at Aetrix Electronics and suitable for power-supply temperature monitoring, notebook computer thermal management, and battery management systems requiring stable component supply across extended product lifecycles.
Supply support for TMP175AIDGKT 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 company delivering analog and embedded processing solutions, with leadership in precision analog, power management, and sensor technologies.
The TMPx75 product line was engineered for thermistor replacement in space- and power-constrained thermal protection applications, emphasizing I²C/SMBus interoperability, wide temperature range, and minimal external components.
FAQ
What is the maximum I²C bus frequency supported by the TMP175AIDGKT?
The TMP175AIDGKT supports standard-mode (100 kHz), fast-mode (400 kHz), and high-speed mode (up to 2 MHz). High-speed mode requires the master to issue an Hs-mode master code (00001XXX) after START; the TMP175AIDGKT automatically reconfigures its input/output filters to maintain signal integrity. Timing compliance is verified per I²C specification, with t(HIGH) as low as 0.06 μs in high-speed mode.
Does the TMP175AIDGKT require external calibration to achieve ±1 °C accuracy?
No, the TMP175AIDGKT achieves ±1 °C typical accuracy from −40 °C to +125 °C without external calibration or signal conditioning circuitry. This is enabled by factory-trimmed on-die diode sensing and a highly linear ΔΣ ADC. The device's accuracy specification is guaranteed across its full operating range and supply voltage (2.7 V to 5.5 V), as confirmed in Section 6.5 of the SBOS288M datasheet.
How does the TMP175AIDGKT handle multiple devices asserting ALERT simultaneously on the same bus?
The TMP175AIDGKT implements native SMBus Alert arbitration: when multiple devices drive ALERT low, the master issues an SMBus Alert command (00011001), and devices compete during the slave address transmission phase. The winning device clears its ALERT output upon successful arbitration; losers retain active ALERT until polled. This hardware-level resolution eliminates software polling overhead and ensures deterministic interrupt handling in multi-sensor systems using TMP175AIDGKT.
Can the TMP175AIDGKT operate from a 1.8 V supply?
No, the TMP175AIDGKT requires a minimum supply voltage of 2.7 V and operates up to 5.5 V. Operation below 2.7 V is outside specification and may result in undefined behavior, including inaccurate temperature readings, failed I²C communication, or inability to enter standby mode. For 1.8 V systems, consider TI's TMP1075 or other low-voltage digital temperature sensors explicitly rated for that rail.
What is the thermal resistance (RθJA) of the TMP175AIDGKT in its VSSOP-8 package?
The TMP175AIDGKT in the DGK (VSSOP-8) package has a junction-to-ambient thermal resistance (RθJA) of 185 °C/W under standard JEDEC test conditions (JESD51-2). This value assumes a 1-inch² copper pad on a 2-layer board with no internal planes. Actual RθJA in end equipment depends on PCB layout, copper area, airflow, and nearby heat sources - design guidance is provided in Section 10 of the SBOS288M datasheet.
TMP175AIDGKT 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:
- Obsolete
- Sensor Type:
- Digital, Local
- Sensing Temperature - Local:
- -40°C ~ 125°C
- Sensing Temperature - Remote:
- -
- Output Type:
- I2C/SMBus
- Voltage - Supply:
- 2.7V ~ 5.5V
- Resolution:
- 9 b
- Features:
- One-Shot, Output Switch, Programmable Resolution, Shutdown Mode, Standby Mode
- Accuracy - Highest (Lowest):
- ±1.5°C (±2°C)
- Test Condition:
- -25°C ~ 85°C (-40°C ~ 125°C)
- Operating Temperature:
- -55°C ~ 127°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-VSSOP
TMP175AIDGKT FAQ
1.How can I place an order for TMP175AIDGKT through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP175AIDGKT 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 TMP175AIDGKT reliable?
The price and inventory of TMP175AIDGKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP175AIDGKT is usually 5 days.
3.What payment methods are accepted for TMP175AIDGKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP175AIDGKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP175AIDGKT?
TMP175AIDGKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP175AIDGKT 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 TMP175AIDGKT?
For technical support, including TMP175AIDGKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP175AIDGKT requirements.
6.How does Aetrix verify that TMP175AIDGKT is sourced from the original manufacturer or authorized distributors?
All TMP175AIDGKT 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 TMP175AIDGKT meets industry standards.
7.What is the process for return or replacement of TMP175AIDGKT?
All TMP175AIDGKT units undergo pre-shipment inspection (PSI). If there is an issue with TMP175AIDGKT, 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 TMP175AIDGKT part is unused and in its original packaging.
Return procedure for TMP175AIDGKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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