Specifications
| Type | Description |
|---|---|
| Part Number | TMP112 |
| Manufacturer | Texas Instruments |
| Product Type | Digital temperature sensor |
| Category | Sensor |
| Package / Case | SOT563-6 1.6 mm x 1.6 mm; X2SON-5 0.8 mm x 0.8 mm |
| Sensor Function | Digital temperature sensor; TMP112 family |
| Interface | SMBus, two-wire, and I2C compatible; digital output interface |
| Supply Voltage Range | 1.4 V to 3.6 V; recommended operating conditions |
| Nominal Supply Voltage | 3.3 V; recommended operating conditions |
| Operating Free-Air Temperature | -40°C to +125°C; recommended operating conditions |
| Temperature Measurement Range | -40°C to +125°C; TA=25°C, V+=1.4 V to 3.6 V |
| TMP112A Accuracy | typ ±0.1°C, max ±0.5°C; 25°C, V+=3.3 V |
| TMP112A Accuracy | typ ±0.25°C, max ±0.5°C; 0°C to +65°C, V+=3.3 V |
| TMP112A Accuracy | typ ±0.5°C, max ±1°C; -40°C to +125°C |
| TMP112B Accuracy | typ ±0.1°C, max ±0.5°C; 25°C, V+=1.8 V |
| TMP112B Accuracy | typ ±0.25°C, max ±0.5°C; 0°C to +65°C, V+=1.8 V |
| TMP112B Accuracy | typ ±0.5°C, max ±1°C; -40°C to +125°C |
| TMP112Dx Accuracy | typ ±0.1°C, max ±0.5°C; 25°C |
| TMP112Dx Accuracy | typ ±0.25°C, max ±0.5°C; -25°C to +85°C, V+ >= 1.5 V |
| TMP112Dx Accuracy | typ ±0.5°C, max ±1°C; -40°C to +125°C |
| TMP112N Accuracy | max ±1°C; -40°C to +125°C |
| Resolution | 12 bits; 0.0625°C LSB; on-chip ADC temperature conversion |
| Conversion Time | typ 10.25 ms, max 11.25 ms; TA=25°C, V+=1.4 V to 3.6 V |
| Conversion Rate | 0.25 conversions/s; CR1=0, CR0=0 |
| Conversion Rate | 1 conversion/s; CR1=0, CR0=1 |
| Default Conversion Rate | 4 conversions/s; CR1=1, CR0=0 |
| Conversion Rate | 8 conversions/s; CR1=1, CR0=1 |
| Average Quiescent Current | typ 3.2 µA, max 5 µA; serial bus inactive, CR1=0, CR0=1 |
| Average Quiescent Current | typ 4.8 µA, max 7.5 µA; serial bus inactive, CR1=1, CR0=0 default |
| Average Quiescent Current | max 10 µA; serial bus active, SCL frequency=400 kHz |
| Average Quiescent Current | max 18 µA; serial bus active, SCL frequency=1 MHz |
| Average Quiescent Current | max 40 µA; serial bus active, SCL frequency=2.85 MHz |
| Shutdown Current | typ 0.15 µA, max 0.35 µA; serial bus inactive |
| Shutdown Current | max 5.5 µA; serial bus active, SCL frequency=400 kHz |
| Shutdown Current | max 13 µA; serial bus active, SCL frequency=1 MHz |
| Shutdown Current | max 35 µA; serial bus active, SCL frequency=2.85 MHz |
| DC Power-Supply Sensitivity | typ 0.0625°C/V, max ±0.25°C/V; -40°C to +125°C |
| Long-Term Drift | ±0.0625°C; TMP112A/B/D/N DRL package, 3000 hours at 125°C |
| Long-Term Drift | ±0.125°C; TMP112Dx DPW package, 3000 hours at 125°C |
| Input Capacitance | 3 pF; digital input/output |
| Input Logic High Voltage | min 0.7 x V+, max 3.6 V; digital input/output |
| Input Logic Low Voltage | min -0.5 V, max 0.3 x V+; digital input/output |
| Input Current | max 1 µA; TMP112A/B/N, 0 < VIN < 3.6 V |
| Input Current | max 0.1 µA; TMP112Dx, 0 < VIN < 3.6 V |
| SDA Output Low Voltage | min 0 V, max 0.4 V; V+ > 2 V, IOL=3 mA |
| SDA Output Low Voltage | min 0 V, max 0.2 x V+; V+ < 2 V, IOL=3 mA |
| ALERT Output Low Voltage | min 0 V, max 0.4 V; V+ > 2 V, IOL=3 mA |
| ALERT Output Low Voltage | min 0 V, max 0.2 x V+; V+ < 2 V, IOL=3 mA |
| Timeout Time | min 30 ms, max 40 ms; SCL=GND or SDA=GND |
| SCL Operating Frequency | 0.001 MHz to 0.4 MHz; Fast mode |
| SCL Operating Frequency | 0.001 MHz to 1 MHz; Fast mode plus |
| SCL Operating Frequency | 0.001 MHz to 2.85 MHz; High-speed mode |
| Absolute Maximum Supply Voltage | max 4 V; over free-air temperature range |
| Absolute Maximum Output Current | ±10 mA; over free-air temperature range |
| Storage Temperature | -60°C to +150°C; absolute maximum ratings |
| ESD Rating HBM | ±2000 V; per ANSI/ESDA/JEDEC JS-001 |
| ESD Rating CDM | ±1000 V; per JEDEC JESD22-C101 |
| Datasheet Status | request_only |
Product Overview
The TMP112 is a Texas Instruments digital temperature sensor in the Sensor category. Its digital output interface is SMBus, two-wire, and I2C compatible, supporting use in serial-bus temperature measurement designs. Recommended supply operation spans 1.4 V to 3.6 V, with 3.3 V listed as the nominal supply voltage.
The device measures temperature across -40°C to +125°C and is specified for the same operating free-air temperature range. The on-chip ADC temperature conversion provides 12-bit resolution with a 0.0625°C LSB. Conversion time is typically 10.25 ms and 11.25 ms maximum, with selectable conversion rates of 0.25, 1, 4 default, or 8 conversions/s.
Package information includes SOT563-6 at 1.6 mm x 1.6 mm and X2SON-5 at 0.8 mm x 0.8 mm. Electrical interface limits include defined logic thresholds, SDA and ALERT low-level output ratings, SCL operating frequency modes up to 2.85 MHz, and timeout behavior when SCL or SDA is held low.
Key Features
- Digital temperature sensor in the TMP112 family
- SMBus, two-wire, and I2C-compatible digital interface
- 1.4 V to 3.6 V recommended supply range
- -40°C to +125°C temperature measurement range
- 12-bit conversion with 0.0625°C LSB resolution
- Typical 10.25 ms temperature conversion time
- Selectable 0.25 to 8 conversions/s conversion rates
- Typical 0.15 µA shutdown current with inactive serial bus
- Fast, fast mode plus, and high-speed SCL modes
- SOT563-6 and X2SON-5 package options
Typical Applications
- I2C temperature measurement
- SMBus temperature measurement
- Two-wire sensor systems
- Low-voltage temperature sensing
- Wide-temperature monitoring
- High-speed serial-bus sensing
Procurement Notes
When requesting a quote for TMP112, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What type of sensor is the TMP112?
The TMP112 is a Texas Instruments digital temperature sensor in the Sensor category. It provides a digital output interface compatible with SMBus, two-wire, and I2C bus systems.
What supply voltage range does TMP112 support?
The recommended operating supply voltage range for TMP112 is 1.4 V to 3.6 V. The extracted operating conditions also list 3.3 V as the nominal supply voltage.
What temperature range can TMP112 measure?
TMP112 is specified for a temperature measurement range of -40°C to +125°C. The recommended operating free-air temperature range is also -40°C to +125°C.
What resolution and conversion time are specified?
The on-chip ADC temperature conversion is specified at 12 bits with a 0.0625°C LSB. Conversion time is typically 10.25 ms and 11.25 ms maximum at TA=25°C across V+=1.4 V to 3.6 V.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 12, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.