onsemi Thermal Management ADM1021ARQZ

The ADM1021ARQZ is a dual-channel digital thermometer designed for thermal monitoring in personal computers and similar systems. It measures the temperature of a microprocessor using a diode-connected PNP transistor, which can be integrated on-chip or sourced as a discrete component. The device features a unique measurement technique that eliminates the need for calibration, ensuring accurate readings with a 1°C accuracy for the on-chip sensor and 3°C for the remote sensor. This PMIC communicates via a two-wire SMBus interface, allowing for programmable under/overtemperature limits and an ALERT output to signal when temperatures exceed set thresholds. The ADM1021ARQZ operates with a supply voltage range of 3.0V to 5.5V and has a maximum operating current of 200 µA, with a standby current of just 1 µA. It is housed in a compact 16-lead QSOP package and is compliant with RoHS standards, being both Pb-free and halogen-free. Applications for the ADM1021ARQZ include desktop and notebook computers, smart batteries, industrial controllers, telecom equipment, and instrumentation, making it a versatile choice for engineers looking for reliable thermal management solutions.