The ADM1020 is a two-channel digital thermometer and under/over temperature alarm, intended for use in personal computers and other systems requiring thermal monitoring and management. The device can measure local and remote temperatures and provides temperature limit comparisons and alarm functions.
The ADM1020 is an 8-lead device designed as a two-channel digital thermometer and under/over temperature alarm. It measures the temperature of a microprocessor using a diode-connected transistor or an on-chip sensor, eliminating the need for calibration through a novel measurement technique.
The device communicates via a two-wire SMBus serial interface to allow programming of over/under temperature limits and conversion rates. It features programmable alert outputs that signal when temperatures exceed programmed thresholds, making it suitable for desktop computers, notebooks, smart batteries, and industrial controllers.
| Temperature Resolution | 1 °C Guaranteed No Missed Codes |
|---|---|
| Supply Voltage Range | +3 V to +5.5 V |
| Operating Temperature Range | -55°C to +125°C |
| Package Type | 8-Lead SOIC Package |
| Standby Supply Current | 3 pA (typical) |
No, a novel measurement technique cancels out the absolute value of the transistor's base emitter voltage so that no calibration is required.
The device communicates over a two-wire serial interface compatible with System Management Bus (SMBus) standards.
The device provides 1°C accuracy for the on-chip sensor and 3°C accuracy for the remote sensor.