The Thermal Monitor and Fan Speed (RPM) Controller ADM1034 is a temperature monitoring and fan speed controller with 1 local and 2 remote temperature channels. It offers high accuracy and fast measurement speed. It also features programmable temperature limits, fault queue, and fan fault output, among others.
The ADM1034 is a dual‑channel remote‑ and local‑temperature sensor and fan controller. It monitors up to two remote thermal diodes and its own ambient temperature, and can drive two cooling fans with programmable speed or a temperature‑to‑fan‑speed look‑up table. The device communicates via a 2‑wire SMBus 2.0 interface and provides ALERT, THERM, and FAN_FAULT signals for fault monitoring.
The datasheet details electrical specifications, absolute maximum ratings, pin configuration, internal registers, and typical performance characteristics. It also includes timing diagrams for the SMBus interface and mechanical outline dimensions for the 16‑lead QSOP package.
| Supply Voltage | 3.0 V – 3.6 V |
|---|---|
| Supply Current | 3 mA |
| Internal Sensor Accuracy | ±1 °C (typ) |
| Temperature Resolution | 0.03125 °C |
| Fan Speed Measurement Accuracy | ±4 % |
| TACH Input High Voltage | 2.0 V – 5.5 V |
| ALERT Output Low Voltage | 0.4 V |
The device operates from 3.0 V to 3.6 V supply voltage.
It provides one local temperature channel and two remote temperature channels.
The ADM1034 communicates over a 2‑wire SMBus 2.0 interface, compatible with SMBus 1.1.