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Texas Instruments TMP125AIDBVT
- Part No.:
- TMP125AIDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- SOT-23-6
- Datasheet:
-
TMP125AIDBVT.pdf
- Description:
- SENSOR DIGITAL -40C-125C SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:102
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Product details
Overview
TMP125AIDBVT from Texas Instruments is a 10-bit SPI-compatible digital temperature sensor in SOT23-6 package, delivering ±2.0°C accuracy from −25°C to +85°C and ±2.5°C from −40°C to +125°C, with 0.25°C resolution, 50µA max quiescent current, and 2.7V–5.5V supply range - deployed for thermal protection in notebook computers and telecom equipment.
For engineers reviewing the TMP125AIDBVT datasheet, TMP125AIDBVT pinout, TMP125AIDBVT application, or TMP125AIDBVT equivalent, key selection criteria include SPI interface compatibility, −40°C to +125°C operating range, SOT23-6 footprint constraints, shutdown mode control via SI pin, and 120ms update rate for low-power thermal monitoring.
Technical Context
The TMP125AIDBVT integrates a ΔΣ A/D converter and on-chip temperature-sensing diode, with internal oscillator and SPI-compatible serial interface logic. It performs continuous 10-bit conversions without external components, latching data into a 16-bit read-only register where D14–D5 hold signed two's complement temperature values.
Communication requires CS assertion followed by 16 SCK cycles; SI pin controls shutdown entry (high on third SCK rising edge) and exit (16-cycle low-SI command). Conversion time is fixed at 60ms, with automatic idle mode (20µA) between 120ms updates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit output with 0.25°C LSB step - enables precise thermal threshold detection in embedded systems. |
| Accuracy | ±2.0°C over −25°C to +85°C - meets industrial-grade thermal protection tolerances for peripheral devices. |
| Supply Range | 2.7V to 5.5V - supports direct integration with 3.3V and 5V microcontroller I/O domains without level-shifting. |
| Quiescent Current | 50µA max (active), 1µA max (shutdown) - extends battery life in portable instrumentation and wireless sensors. |
| Conversion Time | 60ms per measurement - defines minimum thermal response latency and power-on-to-data timing budget. |
| Operating Range | −40°C to +125°C (specified), −55°C to +125°C (operational) - suitable for under-hood automotive ECUs and base station RF modules. |
| Interface | SPI-compatible 4-wire (CS/SCK/SI/SO) - enables daisy-chaining and deterministic timing control in multi-sensor systems. |
Pinout & Package
SOT23-6 surface-mount package (DBV), 1.45mm max height, 3.05mm × 1.75mm body, 0.95mm lead pitch, RoHS-compliant NiPdAu finish, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Primary return path for analog and digital circuits; must be low-impedance to minimize noise coupling into temperature sensing. |
| 2 - SI | Serial input / shutdown control | Active-high shutdown trigger on third SCK rising edge; also accepts one-shot command; tied low to disable shutdown. |
| 3 - V+ | Power supply | Accepts 2.7V–5.5V; requires 0.1µF bypass capacitor near pin to stabilize internal regulator and reduce conversion noise. |
| 4 - SO | Serial output | Open-drain compatible; outputs 16-bit data MSB-first on SCK falling edge; high-impedance when CS high. |
| 5 - CS | Chip select | Active-low enable; initiates data latch and serial transfer; must remain low for full 16-bit clock cycle. |
| 6 - SCK | Serial clock | Input clock up to 10MHz; timing-critical for setup/hold compliance (t2 ≥20ns, t4 ≥20ns). |
Key Features
| Feature | Design Value |
|---|---|
| Hardware shutdown control | Reduces current to ≤1µA via SI pin without software overhead - critical for energy harvesting and wake-on-event designs. |
| No external components required | Self-contained sensing + conversion + SPI interface eliminates BOM cost and layout area for discrete ADC or signal conditioning. |
| Chip-level thermal sensing | Measures die temperature directly; thermal path dominated by leads - enables accurate PCB hotspot tracking near ICs or power stages. |
| 120ms update period | Automatically balances power consumption (20µA idle) and thermal responsiveness - avoids polling overhead in firmware. |
| Signed two's complement output | 10-bit temperature data in D14–D5 of 16-bit register simplifies firmware parsing and sign-aware arithmetic in host MCU. |
Applications
| Base Station Thermal Monitoring | Notebook CPU Thermal Protection |
|---|---|
|
Use Scenario: Real-time junction temperature tracking of PA transistors in LTE/5G remote radio units. IC Role / Device Role / Timing Role: Primary die-temperature sensor feeding thermal throttling logic in FPGA-based control subsystem. Use Value: ±2.5°C accuracy across −40°C to +125°C ensures safe derating before silicon thermal limits are exceeded. |
Use Scenario: Dynamic thermal guardbanding for Intel Core i7 processors during turbo boost operation. IC Role / Device Role / Timing Role: Dedicated thermal monitor interfaced to EC firmware via SPI, updating every 120ms. Use Value: 0.25°C resolution enables fine-grained fan speed control and prevents premature thermal throttling. |
| Data Acquisition System Ambient Sensing | Office Machine Motor Overtemperature Detection |
|
Use Scenario: Environmental chamber calibration reference within 16-channel isolated DAQ module. IC Role / Device Role / Timing Role: Local ambient sensor co-located with ADC reference circuitry to compensate drift. Use Value: 50µA quiescent current minimizes self-heating error (<0.1°C) in precision measurement contexts. |
Use Scenario: Closed-loop thermal cutoff for paper-handling stepper motors in multifunction printers. IC Role / Device Role / Timing Role: Safety-critical shutdown sensor wired to dedicated comparator input on motor driver ASIC. Use Value: Hardware shutdown mode (1µA) allows always-on monitoring without compromising standby power budget. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital temperature sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMP124AIDBVT | Programmable 10-bit SPI sensor with alert output and user-configurable resolution (9–12 bit); ±1.5°C accuracy over −40°C to +125°C. | Supports interrupt-driven thermal alerts and configurable conversion rate; requires additional firmware initialization. | Select TMP124AIDBVT when system needs hardware thermal interrupts or adjustable resolution without changing layout. |
| TMP121AIDBVT | 10-bit SPI sensor with identical pinout and accuracy (±2.0°C/±2.5°C), but no hardware shutdown; 65µA max quiescent current. | Lacks SI-controlled shutdown; relies on CS gating for power management - less efficient for ultra-low-power sleep modes. | Choose TMP121AIDBVT only if shutdown functionality is unused and board space permits slightly higher active current. |
Compared with TMP125AIDBVT, TMP124AIDBVT adds configurability at the cost of initialization complexity, while TMP121AIDBVT sacrifices shutdown capability for marginally simpler interface - TMP125AIDBVT remains optimal for fixed-function, low-quiescent-power thermal monitoring.
Availability
TMP125AIDBVT is available at Aetrix Electronics and suitable for notebook computers, telecom equipment, data acquisition systems, and office machines requiring stable component supply and legacy-compatible thermal sensing.
Supply support for TMP125AIDBVT 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 over 90 years of innovation in precision analog design.
The TMP125AIDBVT belongs to TI's precision analog temperature sensor product line, engineered for reliable, low-power thermal monitoring in space-constrained industrial and computing applications.
FAQ
What is the operating temperature range of the TMP125AIDBVT?
The TMP125AIDBVT is specified for −40°C to +125°C operation, with extended functionality down to −55°C. Its accuracy is ±2.0°C from −25°C to +85°C and ±2.5°C across the full −40°C to +125°C range. This makes the TMP125AIDBVT suitable for harsh environments such as telecom base stations and automotive under-hood modules where thermal stability is critical.
Does the TMP125AIDBVT require external components to operate?
No, the TMP125AIDBVT requires no external components for basic operation. A 0.1µF supply bypass capacitor is recommended at the V+ pin to suppress noise and ensure stable conversion performance. The TMP125AIDBVT integrates the temperature-sensing element, ΔΣ A/D converter, oscillator, and SPI interface logic on-die - eliminating need for discrete op-amps, references, or ADCs in thermal monitoring designs.
How does the shutdown mode work on the TMP125AIDBVT?
The TMP125AIDBVT enters hardware shutdown when SI is driven high on the rising edge of the third SCK pulse during a 16-bit SPI transaction; current drops to ≤1µA. To exit shutdown, a full 16-bit transaction with SI held low is required. This feature enables the TMP125AIDBVT to maintain ultra-low power in battery-operated systems without MCU intervention - unlike software-controlled alternatives.
What is the conversion timing behavior of the TMP125AIDBVT?
The TMP125AIDBVT completes each temperature conversion in exactly 60ms, then enters a 60ms idle state (20µA), resulting in a fixed 120ms update period. Data from the most recent completed conversion is latched upon CS assertion. This deterministic timing allows predictable power budgeting and eliminates polling uncertainty - a key advantage of the TMP125AIDBVT over asynchronous sensors.
Is the TMP125AIDBVT pin-compatible with other TI temperature sensors?
Yes, the TMP125AIDBVT shares the SOT23-6 (DBV) package and identical pinout with TMP121AIDBVT, TMP122AIDBVT, TMP123AIDBVT, and TMP124AIDBVT. All use GND/SI/V+/SO/CS/SCK mapping. However, functional differences exist: TMP125AIDBVT lacks programmable registers but includes dedicated hardware shutdown, whereas TMP124AIDBVT adds alert output and resolution control - verify firmware compatibility before substitution.
TMP125AIDBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Sensor Type:
- Digital, Local
- Sensing Temperature - Local:
- -40°C ~ 125°C
- Sensing Temperature - Remote:
- -
- Output Type:
- SPI
- Voltage - Supply:
- 2.7V ~ 5.5V
- Resolution:
- 9 b
- Features:
- One-Shot, Shutdown Mode
- Accuracy - Highest (Lowest):
- ±2°C (±2.5°C)
- Test Condition:
- -25°C ~ 85°C (-40°C ~ 125°C)
- Operating Temperature:
- -55°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-23-6
TMP125AIDBVT FAQ
1.How can I place an order for TMP125AIDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP125AIDBVT 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 TMP125AIDBVT reliable?
The price and inventory of TMP125AIDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP125AIDBVT is usually 5 days.
3.What payment methods are accepted for TMP125AIDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP125AIDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP125AIDBVT?
TMP125AIDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP125AIDBVT 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 TMP125AIDBVT?
For technical support, including TMP125AIDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP125AIDBVT requirements.
6.How does Aetrix verify that TMP125AIDBVT is sourced from the original manufacturer or authorized distributors?
All TMP125AIDBVT 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 TMP125AIDBVT meets industry standards.
7.What is the process for return or replacement of TMP125AIDBVT?
All TMP125AIDBVT units undergo pre-shipment inspection (PSI). If there is an issue with TMP125AIDBVT, 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 TMP125AIDBVT part is unused and in its original packaging.
Return procedure for TMP125AIDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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