ADM1021 is a low-cost microprocessor system temperature monitor. The product has on-chip and remote temperature sensing capabilities, no calibration required, with on-chip temperature sensor accuracy of 1℃ and remote sensor accuracy of 3℃.
The ADM1021 is a low-cost microprocessor system temperature monitor designed to measure temperatures using on-chip or remote sensors. It features improved accuracy over previous models like the MAX1617, with 71°C accuracy for on-chip sensing and 3°C accuracy for remote sensors.
The device utilizes a two-wire SMBus serial interface to communicate programmable over/under temperature limits and conversion rates. When limits are exceeded, an ALERT output signals the condition as an interrupt or SMBus alert. The chip supports applications in desktop computers, notebook computers, smart batteries, industrial controllers, and telecom equipment.
| Temperature Error, Remote Sensor | -3 +3 °C Ta = +60°C to +100°C |
|---|---|
| Supply Voltage Range | 3.0 V to 5.5 V |
| Standby Supply Current | 3 pA (typical) |
| Operating Temperature Range | -55°C to +125°C |
| Package Type | 16-Lead QSOP |
The device provides 71°C accuracy for the on-chip sensor.
No, no calibration is necessary as the measurement technique cancels out the absolute value of the transistor's base emitter voltage.
It uses a two-wire SMBus serial interface compatible with System Management Bus standards.