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Texas Instruments TMP175AID
- Part No.:
- TMP175AID
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TMP175AID.pdf
- Description:
- SENSOR DIGITAL -40C-125C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,054
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Product details
Overview
TMP175AID 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 SOIC package supports up to 27 devices on one bus-ideal for multi-zone thermal management in notebook computers and power-supply monitoring.
For engineers reviewing the TMP175AID datasheet, TMP175AID pinout, TMP175AID application, or TMP175AID equivalent, key selection criteria include SMBus Alert support, 27-device addressability, low-quiescent-current operation (50 µA active, 0.1 µA standby), and compatibility with LM75-form-factor layouts and existing I²C firmware stacks.
Technical Context
The TMP175AID integrates a ΔΣ ADC, on-chip oscillator, and digital control logic to convert die temperature directly into calibrated 12-bit digital output without external signal conditioning. Its internal diode-based sensor provides linear response across −40 °C to +125 °C, eliminating lookup tables or polynomial compensation.
It implements full SMBus 2.0 and I²C fast-mode (400 kHz) / high-speed mode (up to 2.38 MHz) protocol compliance-including Alert response, general call, timeout recovery, and slave address latching. Address configuration via A0/A1/A2 pins enables 27 unique slave addresses, distinguishing it from the 8-address TMP75 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy | ±1 °C (typical) over −40 °C to +125 °C - enables direct replacement of NTC/PTC thermistors without calibration. |
| Resolution | 9–12 bits, software-selectable - yields 0.5 °C (9-bit) to 0.0625 °C (12-bit) step size for flexible noise/speed tradeoffs. |
| 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 (active), 0.1 µA (standby) - extends battery life in portable thermal monitoring applications. |
| Interface | I²C/SMBus-compatible, open-drain SDA/SCL - integrates seamlessly with standard microcontroller peripherals. |
| Address Pins | A0, A1, A2 - support 27 unique device addresses on shared bus, enabling dense thermal sensor arrays. |
| Alert Function | Active-low open-drain ALERT output - triggers host interrupt on over/under-temperature events without polling. |
Pinout & Package
Package: 8-pin SOIC (D), 4.90 mm × 3.91 mm body size, industry-standard LM75 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SDA) | Serial data I/O | Open-drain bidirectional line; requires external pull-up; handles address, command, and temperature data transfer. |
| 2 (SCL) | Serial clock input | Open-drain clock line; synchronizes all I²C/SMBus transactions; supports up to 2.38 MHz operation. |
| 3 (ALERT) | Overtemperature alert output | Open-drain interrupt signal; asserts when temperature exceeds THIGH or falls below TLOW; compatible with SMBus Alert protocol. |
| 4 (GND) | Ground reference | Primary return path for analog sensor core and digital interface; must be low-impedance for accuracy. |
| 5 (A2) | Address select input | Configures MSB of 7-bit slave address; floating, V+, or GND connection determines unique bus identity. |
| 6 (A1) | Address select input | Configures middle bit of slave address; sampled at each bus communication to support dynamic reconfiguration. |
| 7 (A0) | Address select input | Configures LSB of slave address; enables 27 distinct addresses (vs. 8 for TMP75) for scalable sensor networks. |
| 8 (V+) | Power supply input | Accepts 2.7–5.5 V; powers internal ADC, oscillator, and interface logic; bypass capacitor required per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| 27-device addressability | Three configurable address pins (A0/A1/A2) allow up to 27 TMP175AID units on one I²C bus-reducing wiring complexity in multi-sensor thermal mapping. |
| SMBus Alert protocol support | Hardware-interrupt capability eliminates polling overhead; master identifies triggering device via SMBus Alert command and slave address response. |
| User-selectable resolution | Software-configurable 9–12-bit conversion depth balances measurement precision (0.0625 °C) against conversion time (220–300 ms for 12-bit). |
| NIST-traceable accuracy | While TMP175AID itself is not NIST-traceable (only TMP75 is), its ±1 °C typical accuracy over −40 °C to +125 °C meets industrial thermal protection requirements without system-level calibration. |
| Low-power standby mode | 0.1 µA shutdown current enables years of operation on coin-cell batteries in environmental monitoring nodes. |
Applications
| Server Power Supply Monitoring | Notebook Thermal Protection |
|---|---|
|
Use Scenario: Real-time temperature tracking of VRM MOSFETs, inductors, and DC-DC converters in 1U/2U servers. IC Role / Device Role / Timing Role: Primary die-temperature sensor feeding thermal throttling logic in BMC or host CPU. Use Value: Enables dynamic fan speed control and power capping before thermal shutdown, leveraging 0.0625 °C resolution and ±1 °C accuracy. |
Use Scenario: Zone-based thermal sensing across CPU, GPU, SSD, and battery compartments in ultrabooks. IC Role / Device Role / Timing Role: Distributed temperature node interfacing with EC or embedded controller via shared I²C bus. Use Value: 27-device address space allows discrete sensors per zone without bus contention; ALERT pin triggers immediate thermal mitigation. |
| Battery Management Systems | Industrial HVAC Controllers |
|
Use Scenario: Cell-level temperature monitoring in Li-ion battery packs for EVs and energy storage. IC Role / Device Role / Timing Role: Standalone temperature monitor with SMBus Alert output connected to BMS microcontroller interrupt pin. Use Value: 0.1 µA standby current minimizes self-discharge during storage; wide −40 °C to +125 °C range covers automotive thermal extremes. |
Use Scenario: Ambient and duct-air temperature feedback in commercial HVAC control panels. IC Role / Device Role / Timing Role: Digital temperature transducer replacing analog thermistors in PID loop inputs. Use Value: Eliminates analog signal conditioning and ADC calibration; I²C output simplifies microcontroller integration and firmware updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital temperature sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMP75AID | 8-device address space (A0/A1/A2 only GND/V+); NIST-traceable calibration; identical pinout and electrical specs. | Preferred where metrological traceability is required (e.g., lab equipment, medical devices); lower channel density per bus. | Select TMP75AID when calibration documentation and <±2 °C max error guarantee are mandatory; otherwise TMP175AID offers greater scalability. |
| LM75BIMX | Fixed 8-address space; no A2 pin; 9-bit resolution only; ±2 °C max accuracy; same SOIC-8 package. | Legacy drop-in for cost-sensitive, low-channel-count applications; lacks ALERT interrupt and SMBus features. | Choose LM75BIMX only for brownfield designs requiring exact LM75 compatibility; TMP175AID adds address flexibility, resolution control, and interrupt capability. |
Compared with TMP75AID and LM75BIMX, TMP175AID uniquely combines high bus density (27 addresses), programmable resolution, and SMBus Alert-making it optimal for new designs requiring scalable, interrupt-driven thermal monitoring without sacrificing accuracy or footprint.
Availability
TMP175AID is available at Aetrix Electronics and suitable for server power supply monitoring, notebook thermal protection, and battery management systems requiring stable component supply, long-term lifecycle support, and consistent LM75-form-factor sourcing.
Supply support for TMP175AID 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 delivering analog and embedded processing solutions, with over 90 years of innovation in precision sensing, power management, and interface technologies.
The TMPx75 product line was engineered for thermistor replacement in space-constrained, multi-node thermal monitoring systems-emphasizing I²C/SMBus interoperability, low power, and LM75 footprint compatibility.
FAQ
What is the maximum number of TMP175AID devices supported on a single I²C bus?
The TMP175AID supports up to 27 unique slave addresses via combinations of A0, A1, and A2 pins (including floating states). This enables dense thermal sensor deployments without bus expanders or multiplexers. Each TMP175AID on the bus retains independent configuration and ALERT signaling, making the TMP175AID ideal for multi-zone monitoring architectures where scalability matters.
Does TMP175AID require external calibration to achieve its stated ±1 °C accuracy?
No, the TMP175AID achieves ±1 °C typical accuracy from −40 °C to +125 °C without external calibration or signal conditioning. Its on-die temperature sensor and 12-bit ΔΣ ADC are factory trimmed. While the TMP75 variant is NIST-traceable, the TMP175AID's accuracy specification is validated across process, voltage, and temperature - making it suitable for industrial thermal protection where system-level calibration is impractical.
How does the ALERT pin on TMP175AID function in SMBus interrupt mode?
When configured in thermostat mode (TM = 1), the TMP175AID drives its open-drain ALERT pin low upon crossing THIGH or TLOW thresholds. A master can issue an SMBus Alert command (00011001), and the TMP175AID responds with its slave address - with the LSB indicating whether THIGH (high) or TLOW (low) triggered the event. This hardware interrupt eliminates polling and enables deterministic thermal response in real-time systems using TMP175AID.
Can TMP175AID operate reliably at 2.7 V supply voltage?
Yes, the TMP175AID is fully specified from 2.7 V to 5.5 V. At 2.7 V, quiescent current remains ≤85 µA (active) and conversion time increases by ≤15% versus 5 V operation. All timing parameters, including I²C setup/hold and ALERT response, meet datasheet limits across this range - confirming robust operation in battery-powered or low-voltage industrial applications using TMP175AID.
Is TMP175AID pin-compatible with legacy LM75 temperature sensors?
Yes, the TMP175AID uses the same 8-pin SOIC (D) package and identical pinout as the LM75 - including SDA, SCL, ALERT, GND, V+, and address pins A0/A1/A2. No PCB redesign is needed for drop-in replacement. Firmware updates may be required to leverage enhanced features (e.g., 12-bit resolution, 27-address mode), but basic temperature read functionality works immediately with existing LM75 drivers - ensuring seamless migration to TMP175AID.
TMP175AID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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-SOIC
TMP175AID FAQ
1.How can I place an order for TMP175AID through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP175AID 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 TMP175AID reliable?
The price and inventory of TMP175AID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP175AID is usually 5 days.
3.What payment methods are accepted for TMP175AID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP175AID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP175AID?
TMP175AID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP175AID 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 TMP175AID?
For technical support, including TMP175AID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP175AID requirements.
6.How does Aetrix verify that TMP175AID is sourced from the original manufacturer or authorized distributors?
All TMP175AID 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 TMP175AID meets industry standards.
7.What is the process for return or replacement of TMP175AID?
All TMP175AID units undergo pre-shipment inspection (PSI). If there is an issue with TMP175AID, 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 TMP175AID part is unused and in its original packaging.
Return procedure for TMP175AID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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