| Local sensor accuracy (Max) (+/- C) | 1 |
| Type | Local |
| Operating temperature range (C) | -40 to 150 |
| Supply voltage (Min) (V) | 2.7 |
| Interface type | I2C, SMBus |
| Supply voltage (Max) (V) | 5.5 |
| Supply current (Max) (uA) | 550 |
| Temp resolution (Max) (bits) | 14 |
| Features | ALERT, One-shot conversion, UL recognized |
| Remote channels (#) | 0 |
| Addresses | 6 |
| Rating | Catalog |
- Single Address Pin Offers Choice of Three
Selectable Addresses Per Version for a Total of
Six Possible Addresses. - SMBus and I2C-compatible Two-Wire Interface
- Supports 400-Khz Operation
- Shutdown Mode With One-shot Feature Available
for Very Low Average Power Consumption - Programmable Digital Temperature Resolution
From 11 Bits to 14 Bits - Fast Conversion Rate Ideal for Quick Power Up
and Measuring Rapidly Changing Temperature - Open-Drain ALERT Output Pin Goes Active When
Temperature is Above a Programmed
Temperature Limit - Very Stable, Low-noise Digital Output
- UL Recognized Component
- Key Specifications
- ?Supply Current
- Operating
- 320 μA (Typical)
- 495 μA (Maximum)
- Shutdown
- 8 μA (Maximum)
- 1.9 μA (Typical)
- Operating
- Temperature Accuracy
- ?10°C to 80°C: ±1.0°C (Maximum)
- ?25°C to 115°C: ±1.5°C (Maximum)
- ?40°C to 150°C: ±2°C (Maximum)
- Resolution
- 0.25°C to 0.03125°C
- Conversion Time
- 11-Bit (0.25°C): 14 ms (Maximum)
- 14-Bit (0.03125°C): 112 ms (Maximum)
- ?Supply Current
The LM73 is an integrated, digital-output temperature sensor featuring an incremental Delta-Sigma ADC with a two-wire interface that is compatible with the SMBus and I2C interfaces. The host can query the LM73 at any time to read temperature.
Available in a 6-pin SOT package, the LM73 occupies very little board area while operating over a wide temperature range (–40°C to 150°C) and providing ±1°C accuracy from –10°C to 80°C. The user can optimize between the conversion time and the sensitivity of the LM73 by programming it to report temperature in any of four different resolutions. Defaulting to 11-bit mode (0.25°C/LSB), the LM73 measures temperature in a maximum time of 14 ms, making it ideal for applications that require temperature data very soon after power-up. In its maximum resolution, 14-bit mode (0.03125°C/LSB), the LM73 is optimized to sense very small changes in temperature.
A single multi-level address line selects one of three unique device addresses. An open-drain ALERT output goes active when the temperature exceeds a programmable limit. Both the data and clock lines are filtered for excellent noise tolerance and reliable communication. Additionally, a time-out feature on the clock and data lines causes the LM73 to automatically reset these lines if either is held low for an extended time, thus exiting any bus lock-up condition without processor intervention.
