Dual-channel digital thermometer monitors an on-chip sensor and a remote thermal diode for thermal management systems. The remote channel provides 0.25°C resolution and ±1°C accuracy over the specified high-accuracy range, while the local channel provides 1°C resolution. The device operates from a 3.0 V to 5.5 V supply and communicates over a 2-wire SMBus-compatible serial interface up to 400 kHz. Programmable overtemperature and undertemperature limits, ALERT, THERM, and optional second THERM outputs support system protection and fan control. The temperature measurement range is selectable between 0°C to 127°C and -55°C to 150°C, with automatic cancellation of up to 3 kΩ series resistance in the remote diode path.
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| Supply Voltage | 3.0 to 5.5V |
| Operating Supply Current | 170 typ, 215 maxµA |
| Standby Supply Current | 5.5 typ, 10 max at -40°C to +85°CµA |
| Local Sensor Accuracy | ±3 max°C |
| Local Sensor Resolution | 1°C |
| Remote Diode Sensor Accuracy | ±1 max from +60°C to +100°C ambient°C |
| Remote Sensor Resolution | 0.25°C |
| Temperature Measurement Range | 0 to +127 default or -55 to +150 extended°C |
| Specified Ambient Temperature Range | -40 to +120°C |
| Maximum Series Resistance Cancelled | 3 typkΩ |
| SMBus Clock Frequency | 400 maxkHz |
| SMBus Address | 0x4C |
| Conversion Time | 32.13 min, 114.6 max with averaging onms |
| Open-Drain Output Low Voltage | 0.4 maxV |
| Package Options | 8-Lead SOIC_N, 8-Lead MSOP |
| ESD Rating Human Body Model | 2000V |
| Storage Temperature Range | -65 to +150°C |
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