Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Accuracy | ±0.5°C maximum from 0°C to +65°C at 3.3 V; ±1°C maximum from −40°C to +125°C |
| Supply | 1.4 V to 3.6 V |
| Resolution | 12 bits, 0.0625°C |
| Interface | I²C/SMBus compatible with programmable alert |
| Addresses | Up to four devices on one bus |
| Power | 7.5 µA maximum active; 0.35 µA maximum shutdown stated features |
| Traceability | Production testing is NIST-traceable |
| Packing | SOT-5X3 (DRL), 6 pins; 4000-piece large tape and reel |
Product Overview
TMP112AIDRLR is a low-voltage digital temperature sensor for compact systems that need better than commodity ±1–2°C performance while operating from rails as low as 1.4 V. The SOT-563 footprint is substantially smaller than SOT-23 while retaining I²C/SMBus and an alert function.
The A variant is characterized for ±0.5°C maximum accuracy from 0°C to 65°C under its stated supply condition and ±1°C maximum across −40°C to 125°C. That accuracy window should be matched to the real operating temperature instead of using only the headline number.
Low active and shutdown current make the part suitable for duty-cycled sensing, but sensor placement and self-heating from nearby board components can dominate system error if the package is mounted in a thermally unrepresentative location.
For related devices, see HKEQGOO’s Temperature Sensors category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | TMP112AIDRLR |
| Accuracy | ±0.5°C maximum from 0°C to +65°C at 3.3 V; ±1°C maximum from −40°C to +125°C |
| Supply | 1.4 V to 3.6 V |
| Resolution | 12 bits, 0.0625°C |
| Interface | I²C/SMBus compatible with programmable alert |
| Addresses | Up to four devices on one bus |
| Power | 7.5 µA maximum active; 0.35 µA maximum shutdown stated features |
| Traceability | Production testing is NIST-traceable |
| Packing | SOT-5X3 (DRL), 6 pins; 4000-piece large tape and reel |
| Manufacturer Status | Active / Production |
| Part Marking | OBS |
Functional Highlights
1.4 V operation removes a separate sensor rail in many low-voltage products
The wide low-voltage supply range can connect directly to modern logic domains without a level translator when the I²C pull-ups are chosen appropriately.
Headline ±0.5°C has a defined temperature/supply window
Outside the central range, the published maximum error relaxes. System specifications should use the limit corresponding to the actual environment.
Design Considerations
- Apply the correct accuracy limit for the intended temperature and supply condition.
- Use shutdown or one-shot strategies when long battery life matters.
- Keep I²C pull-ups compatible with the 1.4–3.6 V domain and avoid thermal coupling to unrelated hot components.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists TMP112AIDRLR as Active / Production; SOT-5X3 (DRL), 6 pins; 4000-piece large tape and reel; Level-1-260C-UNLIM; −40°C to +125°C; marking OBS.
Related Engineering Resources
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
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