Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Temperature Range | −55°C to +125°C |
| Accuracy | ±2°C maximum over −55°C to +125°C; typical accuracy is tighter |
| Resolution | User-selectable 9 to 12 bits; 0.0625°C at 12 bits |
| Supply | 2.7 V to 5.5 V |
| Bus / Addressing | I²C/SMBus compatible; two address pins allow up to eight devices per bus |
| Power | 45 µA typical inactive-bus quiescent current; 0.1 µA typical shutdown |
| Variant Choice | TMP100 prioritizes address count and does not provide the TMP101 ALERT pin |
| Packing | SOT-23 (DBV), 6 pins; 3000-piece large tape and reel |
Product Overview
TMP100NA/3K is a small digital temperature sensor for systems that need several individually addressed measurement points on one two-wire bus. Its two hardware address pins allow as many as eight TMP100 devices to coexist without an external address translator.
Resolution can be changed from 9 to 12 bits. Higher resolution gives 0.0625°C code steps but increases conversion time, so the setting should be chosen from the required update rate rather than simply left at the highest resolution.
The exact TMP100 choice is useful when bus address density matters more than a dedicated alert output; the related TMP101 exchanges one address input for an ALERT function.
For related devices, see HKEQGOO’s Temperature Sensors category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | TMP100NA/3K |
| Temperature Range | −55°C to +125°C |
| Accuracy | ±2°C maximum over −55°C to +125°C; typical accuracy is tighter |
| Resolution | User-selectable 9 to 12 bits; 0.0625°C at 12 bits |
| Supply | 2.7 V to 5.5 V |
| Bus / Addressing | I²C/SMBus compatible; two address pins allow up to eight devices per bus |
| Power | 45 µA typical inactive-bus quiescent current; 0.1 µA typical shutdown |
| Variant Choice | TMP100 prioritizes address count and does not provide the TMP101 ALERT pin |
| Packing | SOT-23 (DBV), 6 pins; 3000-piece large tape and reel |
| Manufacturer Status | Active / Production |
| Part Marking | T100 |
Functional Highlights
Address flexibility is the main TMP100/TMP101 difference
TMP100 exposes two address pins and supports up to eight devices on one bus. This is valuable in distributed thermal monitoring where several identical sensors share a controller, but it means there is no dedicated ALERT output on this variant.
Resolution changes conversion time
At 9 bits the conversion is substantially faster than at 12 bits. Systems that power-cycle the sensor or poll many devices should budget conversion latency as well as nominal accuracy.
Design Considerations
- Place the sensor where board temperature represents the intended measurement point; copper connected to the package can conduct heat from nearby power components.
- Select 9–12 bit resolution according to response-time needs; more bits do not improve the specified absolute accuracy.
- Use separate address strapping for each device and confirm pull-up values for the total bus capacitance.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists TMP100NA/3K as Active / Production; SOT-23 (DBV), 6 pins; 3000-piece large tape and reel; Level-2-260C-1 YEAR; −55°C to +125°C; marking T100.
Related Engineering Resources
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