ADT7470ARQZ

ADT7470 is a multichannel temperature sensor and PWM fan controller and fan speed monitor for systems requiring active cooling. It is designed to interface directly to an I²C® bus. It can monitor upto 10 daisy-chained TMP05 temperature sensors. It can also monitor and control the speed of four fans, in automatic or in manual control loops. A FULL-SPEED input is provided to allow the fans to be blasted to maximum speed, via external hardware control, under extreme thermal conditions or on system start-up. An SMBALERT interrupt communicates error conditions such as fan under speed and over temperature measurements to the system service processor. Individual error conditions can then be read from status registers over the IC bus. It is used in application such as servers, networking and telecommunications equipment, desktops etc.

• PWM outputs drive each fan under software control
• Three-state ADDR pin allows up to 3 devices on a single bus
• Limit comparison of all monitored values
• Supports fast I²C standard (400KHz max)
• Meets SMBus 2.0 electrical specifications (fully SMBus 1.1-compliant)
• Operating temperature is -40°C to +125°C
• Package style is 16-lead QSOP

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party