Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Accuracy | ±2°C maximum from −40°C to +125°C; ±1°C typical |
| Supply | 2.7 V to 5.5 V |
| Resolution | User-selectable 9 to 12 bits; 0.0625°C at 12 bits |
| Bus / Addressing | I²C/SMBus; up to eight TMP75 devices on one bus |
| Alert | SMBus ALERT output with programmable limits |
| Compatibility | Industry-standard LM75-style 8-pin form factor and pinout |
| Power | 50 µA quiescent current; 0.1 µA standby stated features |
| Exact Package / Packing | VSSOP (DGK), 8 pins; 2500-piece large tape and reel |
Product Overview
TMP75AIDGKR is a digital temperature sensor built around the established LM75-style 8-pin interface. It provides selectable 9- to 12-bit conversion, eight hardware addresses, and an ALERT output, making it useful when existing board or firmware architecture already follows the common xx75 temperature-sensor model.
The device is specified for −40°C to +125°C operation with ±2°C maximum error and ±1°C typical performance. Resolution is much finer than absolute accuracy: a 12-bit 0.0625°C code step helps control and trend analysis, but does not change the published accuracy limit.
TI states that TMP75 production units are tested against NIST-traceable sensors and equipment. That supports traceability of production test, but system temperature accuracy still depends on board placement and thermal coupling to the intended measurement point.
For related devices, see HKEQGOO’s Temperature Sensors category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | TMP75AIDGKR |
| Accuracy | ±2°C maximum from −40°C to +125°C; ±1°C typical |
| Supply | 2.7 V to 5.5 V |
| Resolution | User-selectable 9 to 12 bits; 0.0625°C at 12 bits |
| Bus / Addressing | I²C/SMBus; up to eight TMP75 devices on one bus |
| Alert | SMBus ALERT output with programmable limits |
| Compatibility | Industry-standard LM75-style 8-pin form factor and pinout |
| Power | 50 µA quiescent current; 0.1 µA standby stated features |
| Exact Package / Packing | VSSOP (DGK), 8 pins; 2500-piece large tape and reel |
| Manufacturer Status | Active / Production |
| Part Marking | T127 |
Functional Highlights
Eight addresses plus ALERT fit multi-zone legacy buses
Three address pins allow several identical sensors on one bus while ALERT can signal a programmed threshold without continuous host polling. This combination is a practical reason to retain TMP75 in an LM75-style platform.
Selectable resolution changes response time, not the basic accuracy grade
Higher resolution gives finer code steps at the cost of longer conversion. Systems with slow thermal dynamics can favor resolution; faster protection loops may prefer shorter conversion latency.
Design Considerations
- Use the accuracy specification rather than ADC resolution when building the temperature error budget.
- Verify legacy LM75 register and alert assumptions before treating a replacement as electrically identical.
- Place the VSSOP where its package temperature represents the intended thermal node rather than a nearby heat source.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists TMP75AIDGKR as Active / Production; VSSOP (DGK), 8 pins; 2500-piece large tape and reel; Level-2-260C-1 YEAR; −40°C to +125°C; marking T127.
Related Engineering Resources
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