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Texas Instruments TMP100NA/3K
- Part No.:
- TMP100NA/3K
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- SOT-23-6
- Datasheet:
-
TMP100NA/3K.pdf
- Description:
- SENSOR DIGITAL -55C-125C SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:10,595
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Product details
Overview
TMP100NA/3K from Texas Instruments is a digital temperature sensor IC featuring a 12-bit delta-sigma ADC, I²C/SMBus interface, and two address pins (ADD0/ADD1) for up to eight devices on one bus. It delivers ±1°C typical accuracy from –55°C to 125°C, 0.0625°C resolution, and operates from 2.7 V to 5.5 V. It is used in thermal protection circuits for notebook computers, power supplies, and battery management systems.
For engineers reviewing the TMP100NA/3K datasheet, TMP100NA/3K pinout, TMP100NA/3K application, or TMP100NA/3K equivalent, key selection considerations include its SOT-23-6 package, programmable 9–12-bit resolution, alert functionality via software polling, shutdown current of 0.1 µA, and compatibility with fast-mode (400 kHz) and high-speed-mode (2 MHz) I²C buses.
Technical Context
The TMP100NA/3K integrates an on-die temperature-sensing diode, a precision delta-sigma ADC, oscillator, control logic, and serial interface circuitry into a single monolithic die. Its thermal measurement path relies primarily on conduction through the GND lead frame, making GND the optimal thermal reference point.
It implements a slave-only I²C/SMBus protocol with configurable resolution, programmable high/low temperature thresholds, and OS/ALERT bit status reporting. Shutdown mode disables conversion circuitry while retaining bus responsiveness, reducing quiescent current to 0.1 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Range | –55°C to 125°C operating range; supports industrial, computing, and battery environments without external calibration. |
| Accuracy | ±1°C typical (–55°C to 125°C); enables direct replacement of NTC/PTC thermistors without linearization firmware. |
| Resolution | User-selectable 9–12 bits; 12-bit mode yields 0.0625°C step size for fine-grained thermal monitoring. |
| Supply Voltage | 2.7 V to 5.5 V; interoperable with 3.3 V and 5 V system rails without level-shifting. |
| Quiescent Current | 45 µA active (SCL = 400 kHz); 0.1 µA in shutdown; suitable for always-on battery-powered sensors. |
| I²C Speed Support | Fast mode (400 kHz) and high-speed mode (2 MHz); allows integration into high-throughput sensor hubs. |
| Address Pins | Two hardware-configurable pins (ADD0, ADD1); enables up to eight unique slave addresses on one bus. |
Pinout & Package
Package: SOT-23-6 (DBV), 2.90 mm × 1.60 mm body size, surface-mount, lead-free RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SCL | Serial clock input | Open-drain I²C clock line; requires external pull-up; supports up to 2 MHz operation. |
| 2 - GND | Ground reference | Primary thermal conduction path; connects directly to metal lead frame for accurate die temperature sensing. |
| 3 - ADD1 | Address select input | Hardware-configured LSB of slave address; sampled once at first I²C communication; float/GND/V+ selectable. |
| 4 - V+ | Power supply input | 2.7 V–5.5 V analog/digital supply; powers ADC, oscillator, and interface logic. |
| 5 - ADD0 | Address select input | Hardware-configured MSB of slave address; latched at first I²C activity; determines unique bus address. |
| 6 - SDA | Serial data I/O | Open-drain bidirectional I²C data line; requires external pull-up; transmits temperature register and config data. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable resolution | 9–12-bit selection via Configuration Register; balances conversion time (320–600 ms at 12-bit) vs precision. |
| SMBus Alert support | Responds to SMBus Alert command (0x19); returns slave address to identify overtemperature event source. |
| Shutdown mode | SD bit enables ultra-low-power state (<0.1 µA); ideal for periodic wake-and-measure battery applications. |
| One-shot conversion | OS bit triggers single measurement in shutdown; eliminates continuous polling overhead in intermittent monitoring. |
| Thermal register format | 12-bit twos-complement output in Temperature Register; direct mapping to °C with 0.0625°C LSB scaling. |
Applications
| Power-Supply Thermal Monitoring | Computer Peripheral Protection |
|---|---|
|
Use Scenario: Real-time temperature tracking of DC-DC converter MOSFETs and inductors in server PSUs. IC Role / Device Role / Timing Role: Primary die-temperature sensor feeding thermal throttling logic via I²C. Use Value: ±1°C accuracy ensures reliable overtemperature shutdown before silicon damage occurs. |
Use Scenario: Thermal guard for USB-C docking stations with multi-rail power delivery. IC Role / Device Role / Timing Role: Localized hotspot detector adjacent to USB-PD controller IC. Use Value: 0.1 µA shutdown current extends standby life without sacrificing rapid wake-up response. |
| Notebook Battery Management | Office Equipment HVAC Control |
|
Use Scenario: Cell-pack temperature monitoring in lithium-ion battery packs for ultrabooks. IC Role / Device Role / Timing Role: Embedded sensor inside battery compartment communicating via dedicated I²C bus. Use Value: Two address pins allow co-location of multiple TMP100NA/3K units per pack for gradient analysis. |
Use Scenario: Compact thermal feedback node in smart thermostats and laser printer fuser assemblies. IC Role / Device Role / Timing Role: Ambient and component temperature monitor interfacing with MCU over shared SMBus. Use Value: SOT-23-6 footprint minimizes PCB area while supporting –55°C cold-start and 125°C fuser operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital temperature sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMP101NA/3K | Single ADD0 pin + dedicated ALERT output; no ADD1; SMBus Alert hardware interrupt capability. | Preferred where hardware interrupt-driven thermal events are required (e.g., immediate fan activation). | Select TMP101NA/3K when a physical ALERT pin is needed; TMP100NA/3K suits software-polling architectures. |
| LM75BIMM/NOPB | 9-bit fixed resolution; ±2°C max accuracy; no programmable resolution; no OS/ALERT bit; same SOT-23-8 package. | Lower-cost option for non-critical ambient sensing where <0.0625°C resolution is unnecessary. | Choose LM75BIMM/NOPB for cost-sensitive designs accepting reduced accuracy and resolution. |
Compared with TMP101NA/3K, TMP100NA/3K trades hardware ALERT for greater I²C address flexibility (8 vs 3 devices/bus); versus LM75BIMM/NOPB, it adds resolution control, tighter accuracy, and lower shutdown current-critical for precision battery and power-supply monitoring.
Availability
TMP100NA/3K is available at Aetrix Electronics and suitable for power-supply thermal monitoring, notebook battery management, and office equipment HVAC control requiring stable component supply across long-lifecycle industrial programs.
Supply support for TMP100NA/3K 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 innovation.
The TMP100NA/3K belongs to TI's precision analog temperature sensor product line, designed specifically for replacing thermistors in digital thermal management systems with minimal firmware overhead.
FAQ
What is the maximum I²C clock frequency supported by the TMP100NA/3K?
The TMP100NA/3K supports fast-mode I²C up to 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 TMP100NA/3K responds by switching internal filters but does not acknowledge the code. This enables faster register reads in bandwidth-constrained systems.
Does the TMP100NA/3K have a dedicated ALERT output pin?
No, the TMP100NA/3K does not include a dedicated ALERT output pin. It supports SMBus Alert functionality via software polling: when configured in Interrupt Mode (TM = 1), it responds to the SMBus Alert command (0x19) by returning its slave address on the SDA line. This differs from the TMP101NA/3K, which provides a hardware-open-drain ALERT pin.
How many unique I²C addresses can be assigned to the TMP100NA/3K?
The TMP100NA/3K supports eight unique I²C slave addresses using its two hardware address pins (ADD0 and ADD1). Each pin can be tied to GND, V+, or left floating, yielding eight combinations (e.g., 0x48–0x4F). The address is latched on the first I²C communication and remains fixed until reset or power cycle.
What is the temperature resolution of the TMP100NA/3K in 12-bit mode?
In 12-bit mode, the TMP100NA/3K achieves a temperature resolution of 0.0625°C. The Temperature Register outputs a 12-bit twos-complement value where the LSB corresponds to 0.0625°C (e.g., 0x0010 = 1.0°C, 0xFFE0 = –2.0°C). Resolution is user-selectable via the Configuration Register's R1–R0 bits.
Can the TMP100NA/3K operate from a 3.3 V supply?
Yes, the TMP100NA/3K operates across a supply range of 2.7 V to 5.5 V, fully supporting standard 3.3 V system rails. All electrical characteristics-including accuracy, conversion time, and I²C timing-are specified and guaranteed within this range. No level-shifting circuitry is required for interfacing with 3.3 V microcontrollers.
TMP100NA/3K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Sensor Type:
- Digital, Local
- Sensing Temperature - Local:
- -55°C ~ 125°C
- Sensing Temperature - Remote:
- -
- Output Type:
- I2C/SMBus
- Voltage - Supply:
- 2.7V ~ 5.5V
- Resolution:
- 11 b
- Features:
- One-Shot, Output Switch, Programmable Resolution, Shutdown Mode, Standby Mode
- Accuracy - Highest (Lowest):
- ±2°C (±3°C)
- Test Condition:
- -25°C ~ 85°C (-55°C ~ 125°C)
- Operating Temperature:
- -55°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-23-6
TMP100NA/3K FAQ
1.How can I place an order for TMP100NA/3K through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP100NA/3K 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 TMP100NA/3K reliable?
The price and inventory of TMP100NA/3K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP100NA/3K is usually 5 days.
3.What payment methods are accepted for TMP100NA/3K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP100NA/3K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP100NA/3K?
TMP100NA/3K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP100NA/3K 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 TMP100NA/3K?
For technical support, including TMP100NA/3K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP100NA/3K requirements.
6.How does Aetrix verify that TMP100NA/3K is sourced from the original manufacturer or authorized distributors?
All TMP100NA/3K 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 TMP100NA/3K meets industry standards.
7.What is the process for return or replacement of TMP100NA/3K?
All TMP100NA/3K units undergo pre-shipment inspection (PSI). If there is an issue with TMP100NA/3K, 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 TMP100NA/3K part is unused and in its original packaging.
Return procedure for TMP100NA/3K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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