The LM82 remote diode and local digital temperature sensor with two-wire interface
The LM82 provides a 2‑wire serial interface (SMBus/I²C compatible) for reading both its own temperature and the temperature of a remote diode. It includes programmable high‑temperature limits, two interrupt outputs (INT and T_CRIT_A), and supports up to nine devices on a single bus using two address pins.
The device is supplied in a 16‑lead QSOP package, operates from 3.0 V to 3.6 V, and delivers 8‑bit temperature data with 1 °C resolution. Detailed electrical characteristics, pin descriptions, and application guidelines are provided for proper PCB layout and noise mitigation.
| Supply Voltage | 3.0 V to 3.6 V |
|---|---|
| Supply Current (max) | 0.8 mA |
| Temperature Resolution | 1 °C (8‑bit) |
| Number of Devices per Bus | Up to 9 LM82s |
| SMBus Clock Frequency | 10 kHz to 100 kHz |
| Package | 16‑lead QSOP (MQA16A) |
Up to nine LM82 devices can be connected on a single bus using the two address pins.
The sensor provides 8‑bit temperature data with a resolution of 1 °C.
The LM82 operates from 3.0 V to 3.6 V.