Overview
The ADM1033ARQZ, produced by onsemi, is a highly integrated thermal monitor and fan speed controller designed for use in various microprocessor-based systems. This device is capable of monitoring both local and remote temperatures with high accuracy and controlling the speed of cooling fans accordingly. It features a 2-wire SMBus 2.0 interface for communication and supports multiple SMBus versions, including ARP-capable and fixed/discoverable modes. The ADM1033ARQZ is particularly useful in applications requiring precise temperature monitoring and fan speed control to maintain optimal system performance and reliability.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage (VCC) | 3.0 | 3.30 | 5.5 | V |
| Supply Current (ICC) | - | - | 3.0 | mA |
| Standby Mode Current | - | - | 900 | μA |
| Internal Sensor Accuracy (20°C ≤ TA ≤ 60°C) | - | - | ±1.0 | °C |
| External Diode Sensor Accuracy (-40°C ≤ TD ≤ +100°C) | - | - | ±2.0 | °C |
| Temperature-to-Digital Converter Resolution | - | 0.03125 | - | °C |
| Maximum Junction Temperature (TJ MAX) | - | - | 150 | °C |
| Storage Temperature Range | -65 | - | +150 | °C |
| Lead Temperature, Soldering (10 s) | - | - | 300 | °C |
| IR Reflow Peak Temperature | - | - | 220 | °C |
Key Features
- Local and Remote Temperature Channels with ±1°C Accuracy
- Automatic Remote Temperature Channel, Up to 1 kΩ
- Fast Temperature Measurements (Up to 64 Measurements per Second)
- SMBus 2.0, 1.1, and 1.0 Compliant
- Programmable Over/Undertemperature Limits
- Programmable Fault Queue
- SMBus ALERT Output for Error Conditions
- Fail-Safe Overtemperature Comparator Output
- Fan Speed (RPM) Controller with Look-up Table for Temperature-to-Fan Speed Control
- Linear and Discrete Options for Look-up Table
- FAN_FAULT Output to Indicate Fan Stalls
- THERM Input to Time PROCHOT Assertions
- REF Input as Reference for THERM (PROCHOT)
- 3.0 V to 5.5 V Supply Voltage Range
- Small 16-lead QSOP Package
- Pb-Free Device
Applications
- Desktop and Notebook PCs
- Embedded Systems
- Telecommunications Equipment
- LCD Projectors
Q & A
- What is the primary function of the ADM1033ARQZ?
The ADM1033ARQZ is a thermal monitor and fan speed controller that monitors local and remote temperatures and controls the speed of cooling fans.
- What is the accuracy of the temperature measurements?
The device offers ±1°C accuracy for both local and remote temperature channels.
- What communication interface does the ADM1033ARQZ use?
The device communicates over a 2-wire SMBus 2.0 interface and supports SMBus 1.1 and 1.0 as well.
- How does the ADM1033ARQZ control fan speed?
The device uses a look-up table to control fan speed based on temperature, with options for discrete or linear fan speed control.
- What is the purpose of the THERM input/output?
The THERM input/output measures assertions on the THERM pin and asserts a low signal to indicate when the measured temperature exceeds the programmed THERM temperature.
- What is the significance of the LOCATION input?
The LOCATION input determines the SMBus version and address, and sets the LLL bits in the UDID in ARP-capable mode.
- What are the power supply requirements for the ADM1033ARQZ?
The device operates with a supply voltage range of 3.0 V to 5.5 V.
- What is the maximum junction temperature for the ADM1033ARQZ?
The maximum junction temperature is 150°C.
- Is the ADM1033ARQZ Pb-free?
Yes, the ADM1033ARQZ is a Pb-free device.
- What are some common applications of the ADM1033ARQZ?
Common applications include desktop and notebook PCs, embedded systems, telecommunications equipment, and LCD projectors.
- How does the ADM1033ARQZ indicate fan faults?
The device asserts a FAN_FAULT output when a fan stalls.
