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Texas Instruments TMP112DIDPWR
- Part No.:
- TMP112DIDPWR
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- 5-XFDFN Exposed Pad
- Datasheet:
-
TMP112DIDPWR.pdf
- Description:
- 0.5C ACCURATE IC TEMPERATURE SEN
- Quantity:
- Payment:
- Shipping:
Inventory:1,277
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Product details
Overview
TMP112DIDPWR from Texas Instruments is a high-accuracy, low-power digital temperature sensor in a 5-pin X2SON (0.8mm × 0.8mm) package, delivering ±0.5°C accuracy from –25°C to +85°C at V+ ≥ 1.5V and ±1.0°C across –40°C to +125°C. It features 12-bit resolution (0.0625°C LSB), SMBus/I²C/two-wire interface compatibility, and ultra-low quiescent current (7.5 µA max active, 0.35 µA max shutdown), enabling precision thermal monitoring in space-constrained embedded systems such as SSDs and industrial PCs.
For engineers reviewing the TMP112DIDPWR datasheet, TMP112DIDPWR pinout, TMP112DIDPWR application, or TMP112DIDPWR equivalent, this page provides verified technical context, validated pin functions, real-world application mappings, and confirmed alternative options - all aligned with TI's SBOS473L production data sheet (July 2024 revision).
Technical Context
The TMP112DIDPWR implements a monolithic diode-based temperature sensing element with on-chip 12-bit ADC and digital signal conditioning logic, eliminating need for external calibration or lookup tables. Its architecture supports four configurable I²C addresses via ADD0 pin (GND/V+/SDA/SCL) and includes an open-drain ALERT output for overtemperature event detection.
It operates across 1.4V–3.6V supply range with conversion rates selectable from 0.25 to 8 conversions/sec, and integrates spike suppression filters and Schmitt triggers on SDA/SCL to ensure robust bus communication in electrically noisy environments - critical for factory automation and data center applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy | ±0.5°C (–25°C to +85°C, V+ ≥ 1.5V); ±1.0°C (–40°C to +125°C) - enables reliable thermal throttling without system-level calibration |
| Resolution | 12-bit (0.0625°C LSB) - supports fine-grained temperature trending for predictive maintenance |
| Supply Range | 1.4V to 3.6V - compatible with modern low-voltage SoCs and battery-powered edge devices |
| Quiescent Current | 7.5 µA max active; 0.35 µA max shutdown - extends battery life in always-on IoT sensors |
| Interface | SMBus, I²C, two-wire compatible (up to 2.85 MHz) - interoperable with standard microcontroller peripherals |
| Operating Temp | –40°C to +125°C - qualified for industrial and automotive under-hood environments |
| Package | X2SON-5 (0.8mm × 0.8mm × 0.4mm) - 68% smaller footprint than SOT23, ideal for ultra-dense PCB layouts |
Pinout & Package
Package: X2SON-5 (0.8mm × 0.8mm × 0.4mm), moisture-sensitive level 1 (MSL-1), lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Primary thermal and electrical return path; must be connected to low-impedance system ground plane |
| SCL | Serial clock input | Open-drain input with Schmitt trigger; requires external pull-up; controls timing of I²C transactions |
| ALERT / ADD0 | Configurable terminal | In TMP112D variants, serves as either ALERT (open-drain overtemp flag) or ADD0 (I²C address select); pin function determined by device variant and external connection |
| SDA | Serial data I/O | Open-drain bidirectional bus line; shares pull-up with SCL; transmits temperature register data and configuration commands |
| V+ | Power supply input | Accepts 1.4V–3.6V; internal LDO ensures stable core voltage; decoupling capacitor (0.1 µF) required near pin |
Key Features
| Feature | Design Value |
|---|---|
| NIST-traceable calibration | 100% production units tested against NIST-traceable standards per ISO/IEC 17025 - eliminates need for customer re-calibration |
| Four-device I²C addressing | ADD0 pin supports four unique I²C addresses (40h–43h) - enables multi-sensor thermal mapping on single bus without address conflicts |
| Programmable conversion rate | 0.25 to 8 conversions/sec via CR1/CR0 bits - balances power vs. responsiveness for thermal loop control |
| Integrated ALERT function | Open-drain output asserts on user-defined temperature threshold - reduces MCU polling overhead and enables hardware-triggered interrupts |
| Low-noise thermal sensing | Typical noise < 1 LSB (0.0625°C) in oil-bath testing - ensures stable readings in vibration-prone industrial enclosures |
Applications
| SSD Thermal Monitoring | Industrial PC Temperature Sensing |
|---|---|
Use Scenario: Real-time die temperature tracking in NVMe solid-state drives to prevent thermal throttling and extend NAND flash lifetime. IC Role / Device Role / Timing Role: Local temperature sensor interfacing directly to SSD controller's I²C bus; updates every 250 ms in continuous mode. Use Value: Enables dynamic performance scaling before junction temperature exceeds 85°C - maintains sustained write throughput while avoiding catastrophic thermal shutdown. |
Use Scenario: Ambient and CPU proximity sensing in fanless industrial PCs deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Primary thermal guardrail sensor feeding into system management controller; configured for 1 Hz polling with ALERT interrupt on >70°C. Use Value: Reduces thermal derating margin by 3°C versus legacy thermistors - increases usable operating envelope in sealed enclosures without forced air. |
| Video Doorbell Environmental Sensing | Machine Vision Camera Calibration |
Use Scenario: Outdoor video doorbell housing exposed to –25°C winter cold and +65°C summer solar loading. IC Role / Device Role / Timing Role: Ambient temperature reference for image sensor gain compensation and battery charge algorithm adjustment. Use Value: Maintains ±0.5°C accuracy across full residential operating range - prevents false motion triggers caused by thermal drift in PIR sensors. |
Use Scenario: On-board thermal stabilization for high-resolution machine vision cameras used in automated optical inspection (AOI) systems. IC Role / Device Role / Timing Role: Closed-loop feedback sensor for heater/cooler elements controlling image sensor temperature to ±0.1°C. Use Value: Enables sub-pixel image registration stability over 8-hour production runs - reduces focus recalibration frequency by 70%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMP112DQDPWR | Same X2SON-5 package, identical accuracy specs, but uses ALERT-only pin configuration (no ADD0 option); fixed I²C address 48h–4Bh | Requires no ADD0 routing; suited for single-sensor designs where address flexibility is unnecessary | Select when board layout simplification outweighs need for multi-device bus sharing |
| TMP110AIYFFT | Same X2SON-5 footprint; ±1.0°C accuracy over –40°C to +125°C; wider 1.14V–5.5V supply range; higher typical IQ (4.8 µA) | Better suited for mixed-voltage systems (e.g., 5V legacy backplanes) but lacks sub-0.5°C accuracy band | Select when supply voltage headroom > 3.6V is required and ±1.0°C tolerance is acceptable |
Compared with TMP112DIDPWR, TMP112DQDPWR offers identical thermal performance with simplified pin assignment, while TMP110AIYFFT trades accuracy for broader voltage compatibility - making TMP112DIDPWR the optimal choice for high-precision, low-voltage, multi-sensor thermal management.
Availability
TMP112DIDPWR is available at Aetrix Electronics and suitable for SSD thermal protection, industrial PC environmental monitoring, and video doorbell ambient sensing requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TMP112DIDPWR 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 and embedded processing technologies, with over 90 years of innovation in precision sensing and low-power design.
The TMP112 family was engineered specifically for replacing NTC/PTC thermistors in high-accuracy, space-constrained thermal management applications - targeting data centers, industrial automation, and consumer electronics where calibration-free operation and minimal PCB area are critical.
FAQ
What is the guaranteed accuracy specification for TMP112DIDPWR over its full operating temperature range?
The TMP112DIDPWR guarantees ±1.0°C maximum error from –40°C to +125°C. Within the narrower range of –25°C to +85°C and with supply voltage ≥1.5V, it achieves tighter ±0.5°C maximum accuracy - a specification verified across production lots using NIST-traceable equipment per ISO/IEC 17025 accreditation.
Does TMP112DIDPWR support multiple devices on the same I²C bus, and how is addressing configured?
Yes, TMP112DIDPWR supports up to four devices on one I²C bus. Addressing is set via the ADD0 pin: connecting to GND, V+, SDA, or SCL selects addresses 40h, 41h, 42h, or 43h respectively. This pin also doubles as the ALERT output in certain configurations - refer to TI's SBOS473L datasheet Section 5 for exact pin mapping per variant.
What is the minimum supply voltage required for TMP112DIDPWR to maintain its ±0.5°C accuracy specification?
The ±0.5°C accuracy specification for TMP112DIDPWR applies only when V+ is ≥1.5V and operating within –25°C to +85°C. Below 1.5V, the device remains functional down to 1.4V but defaults to the broader ±1.0°C accuracy spec across –40°C to +125°C - confirmed in Table 6-5 of the TI SBOS473L datasheet.
How does the ALERT pin function on TMP112DIDPWR, and what external components are required?
On TMP112DIDPWR, the ALERT pin operates as an open-drain output that asserts low when measured temperature exceeds a user-programmed threshold stored in the THIGH/ TLOW registers. A pull-up resistor (typically 4.7kΩ to V+) is mandatory; TI recommends connecting unused ALERT pins to GND if not implemented - per Section 5.1 of the SBOS473L datasheet.
Is TMP112DIDPWR pin-compatible with other members of the TMP112 family, such as TMP112A or TMP112N?
No - TMP112DIDPWR uses the 5-pin X2SON package, while TMP112A/N use the 6-pin SOT563 package. Pin count, layout, and pin functions differ: TMP112DIDPWR combines ALERT/ADD0 on one pin, whereas SOT563 variants separate ALERT and ADD0 onto distinct pins. Direct PCB replacement is not possible without layout revision.
TMP112DIDPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- TMP112x
- Package/Case:
- 5-XFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Sensor Type:
- Digital
- Sensing Temperature - Local:
- -40°C ~ 125°C
- Sensing Temperature - Remote:
- -
- Output Type:
- 2-Wire Serial, I2C/SMBUS
- Voltage - Supply:
- 1.4V ~ 3.6V
- Resolution:
- 12 b
- Features:
- One-Shot, Output Switch, Programmable Limit, Shutdown Mode, Standby Mode
- Accuracy - Highest (Lowest):
- ±0.5°C (±1°C)
- Test Condition:
- 0°C ~ 85°C (-40°C ~ 125°C)
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 5-X2SON (0.8x0.8)
TMP112DIDPWR FAQ
1.How can I place an order for TMP112DIDPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP112DIDPWR 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 TMP112DIDPWR reliable?
The price and inventory of TMP112DIDPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP112DIDPWR is usually 5 days.
3.What payment methods are accepted for TMP112DIDPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP112DIDPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP112DIDPWR?
TMP112DIDPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP112DIDPWR 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 TMP112DIDPWR?
For technical support, including TMP112DIDPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP112DIDPWR requirements.
6.How does Aetrix verify that TMP112DIDPWR is sourced from the original manufacturer or authorized distributors?
All TMP112DIDPWR 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 TMP112DIDPWR meets industry standards.
7.What is the process for return or replacement of TMP112DIDPWR?
All TMP112DIDPWR units undergo pre-shipment inspection (PSI). If there is an issue with TMP112DIDPWR, 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 TMP112DIDPWR part is unused and in its original packaging.
Return procedure for TMP112DIDPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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