Thermal monitor and fan speed controller for system management
It integrates an ADC, comparator, multiplexer, and register bank to convert sensor readings into digital temperature data and drive fan control logic, all communicated over an SMBus interface.
±1°C accuracy and dual-sensor topology
Temperature measurement accuracy is rated at ±1°C, which is tight enough for most fan-speed control loops and overtemperature alarm thresholds without requiring external calibration. The internal sensor monitors the local PCB ambient near the IC, while the external sensor input connects to a remote diode (typically a CPU, GPU, or power transistor) for junction-temperature tracking. An output alarm pin asserts when a programmed temperature limit is exceeded, providing a hardware interrupt for system shutdown or fan boost without polling the SMBus.
Supply voltage and interface
All configuration and temperature readback occurs over the SMBus, which is a subset of I²C with timeout and alert-line support, making it straightforward to integrate with most microcontrollers and baseboard management controllers.
Package and ordering code
The ADM1034ARQ-REEL7 is supplied in a 16-lead SSOP package with a 3.90 mm body width (0.154"), also referred to as a 16-QSOP in the supplier device package field.
This part is RoHS non-compliant, which is a constraint for designs that must meet EU RoHS or similar lead-free directives. Verify your exemption status or consider the ADM1034ARQ base part if your process allows lead-bearing solder.