Specifications
| Type | Description |
|---|---|
| Part Number | TMP123 |
| Manufacturer | Texas Instruments |
| Product Type | Digital temperature sensor |
| Category | Sensor |
| Package / Case | SOT23-6, package designator DBV |
| Sensor interface | SPI-compatible serial interface; Digital output |
| Temperature resolution | 12-bit plus sign, 0.0625 °C; Temperature conversion output |
| Temperature input range | -40 to +125 °C; Electrical characteristics |
| Temperature accuracy | ±0.5 °C typ, ±1.5 °C max; TA=-25°C to +85°C, V+=2.7V to 5.5V |
| Temperature accuracy | ±1.0 °C typ, ±2.0 °C max; TA=-40°C to +125°C, V+=2.7V to 5.5V |
| Temperature accuracy | ±1.5 °C typ; TA=-40°C to +150°C, V+=2.7V to 5.5V |
| Temperature error vs supply | -0.3 to +0.3 °C/V, 0.1 °C/V typ; V+=2.7V to 5.5V |
| Digital input high threshold | 0.7 × V+ min; VIH |
| Digital input low threshold | 0.3 × V+ max; VIL |
| Input current | ±1 µA max; SO, SCK, CS; 0V ≤ VIN ≤ V+ |
| Output low voltage | 0.4 V max; SO, ISINK=3mA |
| Output high voltage | V+ - 0.4 V min; SO, ISOURCE=2mA |
| Digital output resolution | 12 bits; Digital input/output specification |
| Input capacitance | 2.5 pF typ; SO, SCK, CS |
| Conversion time | 240 ms typ, 320 ms max; 12-bit conversion |
| Conversion period | 480 ms typ, 640 ms max; 12-bit conversion; time between conversion starts |
| Supply operating range | 2.7 to 5.5 V; Power supply |
| Quiescent current | 35 µA typ, 50 µA max; Serial bus inactive |
| Shutdown current | 0.1 µA typ, 3 µA max; TMP123, serial bus inactive |
| Specified temperature range | -40 to +125 °C; Device specifications |
| Operating temperature range | -55 to +150 °C; Device operation |
| Storage temperature range | -60 to +150 °C; Storage |
| Thermal resistance | 200 °C/W; θJA, SOT23-6 surface-mount |
| Power supply absolute maximum | 7 V; V+ absolute maximum rating |
| Input voltage absolute maximum | -0.3 to +7 V; Applies to all TMP121 and TMP123 input voltages |
| Input current absolute maximum | 10 mA; Absolute maximum rating |
| Lead temperature | +300 °C; Soldering absolute maximum rating |
| Temperature register width | 16-bit signed read-only register; Stores most recent conversion output |
| Temperature data format | Binary two's complement; Serial temperature output |
| SCK period | 100 ns min; SPI timing parameter t1 |
| SCK falling edge to output data delay | 30 ns max; SPI timing parameter t2 |
| CS to rising edge SCK setup time | 40 ns min; SPI timing parameter t3 |
| CS to output data delay | 30 ns max; SPI timing parameter t4 |
| CS rising edge to output high impedance | 30 ns max; SPI timing parameter t5 |
| Datasheet Status | request_only |
Product Overview
TMP123 is a Texas Instruments digital temperature sensor using a SPI-compatible serial interface for digital temperature output. Its conversion output is 12-bit plus sign with 0.0625 °C resolution, and the serial temperature value is formatted as binary two's complement. The most recent conversion is stored in a 16-bit signed read-only temperature register.
The device is supplied in a SOT23-6 surface-mount package, package designator DBV, with θJA thermal resistance of 200 °C/W. It operates from a 2.7 to 5.5 V supply, with absolute maximum ratings of 7 V on V+ and -0.3 to +7 V on input voltages. Soldering lead temperature is rated at +300 °C.
Temperature specifications cover -40 to +125 °C, while device operation is listed from -55 to +150 °C and storage from -60 to +150 °C. SPI timing includes a 100 ns minimum SCK period, 30 ns maximum output data delay from SCK falling edge, and 40 ns minimum CS-to-SCK setup time. These facts support board-level digital temperature measurement where SPI output, compact packaging, and low inactive-bus current are required.
Key Features
- SPI-compatible serial temperature output
- 12-bit plus sign temperature conversion
- 0.0625 °C temperature resolution
- -40 to +125 °C specified temperature range
- 2.7 to 5.5 V supply operation
- 35 µA typical quiescent current
- 0.1 µA typical shutdown current
- 240 ms typical 12-bit conversion time
- 16-bit signed read-only temperature register
- Binary two's complement temperature data
- SOT23-6 DBV surface-mount package
- 100 ns minimum SCK period
Typical Applications
- SPI temperature monitoring
- Board-level temperature measurement
- Low-current temperature sensing
- SOT23-6 temperature sensor designs
- Digital temperature readout systems
- 2.7 to 5.5 V sensor rails
- Signed temperature data acquisition
Procurement Notes
When requesting a quote for TMP123, 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 interface does the TMP123 use for temperature output?
TMP123 provides digital output through a SPI-compatible serial interface. The serial temperature output uses binary two's complement data, and the most recent conversion is held in a 16-bit signed read-only temperature register.
What temperature resolution and conversion timing does TMP123 provide?
The temperature conversion output is 12-bit plus sign with 0.0625 °C resolution. For 12-bit conversion, the datasheet facts list 240 ms typical and 320 ms maximum conversion time, with 480 ms typical conversion period.
What supply range and inactive current are specified for TMP123?
TMP123 operates from a 2.7 to 5.5 V supply. With the serial bus inactive, quiescent current is specified as 35 µA typical and 50 µA maximum. Shutdown current is 0.1 µA typical and 3 µA maximum.
What package and temperature ranges apply to TMP123?
TMP123 is listed in a SOT23-6 package with package designator DBV. The specified temperature range is -40 to +125 °C, device operation is listed from -55 to +150 °C, and storage is -60 to +150 °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.