Specifications
| Type | Description |
|---|---|
| Part Number | TMP122 |
| Manufacturer | Texas Instruments |
| Product Type | SPI digital temperature sensor |
| Category | Sensor |
| Package / Case | SOT23-6 (DBV) for TMP122; SO-8 (D) for TMP124 |
| Temperature input range | -40 to +125 °C; specified electrical characteristics range |
| Temperature accuracy | ±0.5 °C typ, ±1.5 °C max; TA = -25 °C to +85 °C, V+ = 2.7 V to 5.5 V |
| Temperature accuracy | ±1.0 °C typ, ±2.0 °C max; TA = -40 °C to +125 °C, V+ = 2.7 V to 5.5 V |
| Temperature accuracy | ±1.5 °C typ; TA = -55 °C to +150 °C |
| Accuracy vs supply | -0.3 to +0.3 °C/V, 0.1 °C/V typ; V+ = 2.7 V to 5.5 V |
| Temperature resolution | ±0.0625 °C; 12-bit resolution |
| Programmable resolution | 9 to 12 bits plus sign; selectable by configuration register |
| Digital interface | SPI-compatible; digital output interface |
| Input high voltage | 0.7 × V+ min; digital input logic level |
| Input low voltage | 0.3 × V+ max; digital input logic level |
| Input current | ±1 µA max; SO/I, SCK, CS; 0 V ≤ VIN ≤ V+ |
| SO/I output low voltage | 0.4 V max; ISINK = 3 mA |
| SO/I output high voltage | V+ - 0.4 V min; ISOURCE = 2 mA |
| ALERT output low voltage | 0.4 V max; ISINK = 4 mA |
| ALERT leakage current | ±1 µA max; 0 V ≤ VIN ≤ 6 V |
| Input capacitance | 2.5 pF typ; SO/I, SCK, CS, ALERT |
| Conversion time | 30 ms typ, 40 ms max; 9-bit plus sign resolution |
| Conversion time | 60 ms typ, 80 ms max; 10-bit plus sign resolution |
| Conversion time | 120 ms typ, 160 ms max; 11-bit plus sign resolution |
| Conversion time | 240 ms typ, 320 ms max; 12-bit plus sign resolution |
| Supply voltage operating range | 2.7 to 5.5 V; power supply |
| Quiescent current | 50 µA typ, 75 µA max; serial bus inactive |
| Shutdown current | 0.1 µA typ, 1 µA max; serial bus inactive |
| Specified temperature range | -40 to +125 °C; device specification range |
| Operating temperature range | -55 to +150 °C; device operating range |
| Storage temperature range | -60 to +150 °C; device storage range |
| Thermal resistance | 200 °C/W; SOT23-6 surface-mount package |
| Thermal resistance | 150 °C/W; SO-8 surface-mount package |
| Absolute maximum supply voltage | 7 V; V+ |
| Absolute maximum input voltage | -0.3 to 7 V; all TMP122 and TMP124 input voltages |
| Absolute maximum input current | 10 mA; input current |
| Absolute maximum operating temperature | -55 to +150 °C; operating temperature range |
| Absolute maximum storage temperature | -60 to +150 °C; storage temperature range |
| Maximum junction temperature | +150 °C; TJ max |
| Lead temperature | +300 °C; soldering |
| Bypass capacitor | 0.1 µF recommended; supply bypass capacitor for typical connection |
| ALERT pin type | Open-drain output requiring pull-up resistor; typical connections |
| Temperature register format | 16-bit signed read-only register; stores most recent conversion; first 13 bits indicate temperature |
| Configuration register format | 16-bit read/write register; controls operational modes |
| Power-up resolution setting | R1/R0 = 1/1; configuration register power-up/reset value; all other bits zero |
| Datasheet Status | request_only |
Product Overview
The TMP122 is a Texas Instruments SPI digital temperature sensor in the Sensor category. For TMP122, the package case is SOT23-6 (DBV); the extracted datasheet facts also identify SO-8 (D) for TMP124. The device is specified over -40 to +125 °C and operates over -55 to +150 °C, with storage from -60 to +150 °C.
Key Features
- SPI-compatible digital temperature sensor interface
- Specified -40 to +125 °C temperature range
- Operates from -55 to +150 °C
- 2.7 to 5.5 V supply operating range
- Programmable 9- to 12-bit plus sign resolution
- ±0.0625 °C resolution at 12-bit setting
- 30 ms typical conversion at 9-bit plus sign
- 240 ms typical conversion at 12-bit plus sign
- 50 µA typical quiescent current when serial bus inactive
- 0.1 µA typical shutdown current when serial bus inactive
- Open-drain ALERT output requires pull-up resistor
- 16-bit configuration register controls operational modes
Typical Applications
- SPI temperature monitoring
- Low-current thermal sensing
- Alert-based temperature supervision
- SOT23-6 sensor designs
- 2.7 to 5.5 V systems
- Programmable-resolution temperature measurement
- Shutdown-mode sensor nodes
Procurement Notes
When requesting a quote for TMP122, 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 device is the TMP122?
TMP122 is a Texas Instruments SPI digital temperature sensor in the Sensor category. It uses an SPI-compatible digital output interface and is identified with the SOT23-6 (DBV) package for TMP122.
What temperature range is specified for TMP122?
The specified device temperature range is -40 to +125 °C. The extracted facts also list an operating temperature range of -55 to +150 °C and storage temperature range of -60 to +150 °C.
What supply voltage does TMP122 use?
TMP122 operates from a 2.7 to 5.5 V supply. The extracted absolute maximum supply voltage for V+ is 7 V, and a 0.1 µF supply bypass capacitor is recommended for the typical connection.
How is TMP122 resolution configured?
The device supports programmable resolution from 9 to 12 bits plus sign, selectable by the configuration register. At 12-bit resolution, the listed temperature resolution is ±0.0625 °C.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 7, 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.