ADM1033 Rev. 0 is a thermal monitor and fan speed controller with 1 local and 1 remote temperature channel. It features automatic series resistance cancellation on remote temperature channels, fast measurement rate of up to 64 measurements per second, compliance with SMBus 2.0, 1.1, and 1.0 standards, programmable over-/undertemperature limits, programmable fault queue, fan speed controller with look-up table for temperature-to-fan-speed control, and various inputs and outputs for therm and fan fault.
This handbook describes the ADM1033 remote and local temperature sensor and fan speed controller. It covers the device’s functional blocks, SMBus 2.0 communication, programmable limits, fault handling, and lookup‑table operation for linear or discrete fan control.
The document includes detailed specifications, absolute maximum ratings, pin descriptions, typical performance curves, register maps, timing diagrams, and ordering information for the 16‑lead QSOP package.
| Supply Voltage (Vcc) | 3.0 V (min) – 3.6 V (max), 3.3 V (typ) |
|---|---|
| Supply Current (inactive) | 3 mA |
| Resolution (temperature) | 0.03125 °C |
| Conversion Time (Local Temperature) | 11 ms (averaging enabled) |
| Conversion Time (Remote Temperature) | 32 ms (averaging enabled) |
| Total Conversion Time | 43 ms (averaging enabled) |
| Fan Speed Measurement Accuracy | ±4 % |
| Package | 16‑lead QSOP (RQ‑16) |
The device operates from 3.0 V to 3.6 V, with a typical value of 3.3 V.
The ADM1033 is supplied in a 16‑lead QSOP (RQ‑16) package.
Fan speed is measured with an accuracy of ±4 %.
The 8‑level LOCATION input selects the SMBus version, sets the SMBus address, and configures UDID bits.