Products
MAX1669
PRODUCTIONFan Controller and Remote Temperature Sensor with SMBus Serial Interface
Industry First - Temperature Sensor with PWM and Linear Fan Control
- Part Models
- 2
- 1ku List Price
- price unavailable
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Overview
- Measures Remote CPU Temperature
- No Calibration Required
- 20Hz to 160Hz PWM Output for Fan
- PWM Frequency Sync Input (260kHz)
- Flexible Fan Interface: Linear or PWM
- SMBus 2-Wire Serial Interface
- Programmable Under/Overtemperature Alarms
- ALERT-bar Latched Interrupt Output
- OVERT-bar Thermostat Output
- Two GPIO Pins
- Write-Once Configuration Protection
- Supports SMBus Alert Response
- ±3°C Temperature Accuracy (-40°C to +125°C, remote)
- 3µA Standby Supply Current
- +3V to +5.5V Supply Range
- Small 16-Pin QSOP Package
- Remote diode sensor, PWM and linear fan control, dual alarms
The MAX1669 fan controller includes a precise digital thermometer that reports the temperature of a remote sensor. The remote sensor is a diode-connected transistor-typically a low-cost, easily mounted 2N3906 PNP type-replacing conventional thermistors or thermocouples. Remote accuracy is ±3°C for transistors from multiple manufacturers, with no calibration needed. The MAX1669 has an independent fan controller with a low-current logic output requiring external power components to interface to a DC brushless fan. The fan controller has two modes of operation: a low-frequency (20Hz to 160Hz) PWM mode intended for driving the fan motor, or a high-impedance DAC output that generates a variable DC control voltage. In PWM mode, the FAN frequency can be synchronized to an external clock.
Other key features include general-purpose inputs/outputs (GPIOs) for fan presence detection and a thermostat output intended as a fan override signal in case the host system loses the ability to communicate. The internal ADC has a wide input voltage range and gives overrange readings when too large an input voltage is applied. Other error-checking includes temperature out-of-range indication and diode open/short faults.
The MAX1669 is available in a space-saving 16-pin QSOP package that allows it to fit adjacent to the SLOT1 connector.
Applications
- Computers: Desktop, Workstation, Server
- Notebook Computers
- Pentium® CPU Cooling
- Servers
- Workstations
Documentation
Data Sheet 1
Technical Articles 4
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX1669EEE+ | QSOP | ||
| MAX1669EEE+T | QSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jan 24, 2019 - 1746N ASSEMBLY |
||
| MAX1669EEE+ | PRODUCTION | |
| MAX1669EEE+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
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Tools & Simulations
Software Development 1
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