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ADM1034ARQZ-REEL Folha de dados(PDF) 1 Page - ON Semiconductor |
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1 / 39 page © Semiconductor Components Industries, LLC, 2009 July, 2009 − Rev. 3 1 Publication Order Number: ADM1034/D ADM1034 Thermal Monitor and Fan Speed (RPM) Controller The ADM1034 is a dual−channel remote− and local−temperature sensor and fan controller. The remote channels monitor the temperature of two remote thermal diodes, which may be discrete 2N3904/6s or may be located on a microprocessor die. The device also monitors its own ambient temperature. The ADM1034 can monitor and control the speed of two cooling fans. The user can program a target fan speed, or else use the look−up table to input a temperature−to−fan speed profile. The look−up table can be configured to run the fans at discrete speeds (discrete mode) or to ramp the fan speed with temperature (linear mode). The ADM1034 communicates over a 2−wire SMBus 2.0 interface. An 8−level LOCATION input allows the user to choose between SMBus 1.1 and SMBus 2.0. An ALERT output indicates error conditions. The THERM I/O signals overtemperature as an output and times THERM assertions as an input. Pin 8 can be configured as a reference for the THERM (PROCHOT) input. FEATURES • 1 Local and 2 Remote Temperature Channels • ±1°C Accuracy on Local and Remote Channels • Automatic Remote Temperature Channels, Up to 1 kW • Fast (Up to 64 Measurements per Second) • SMBus 2.0, 1.1, and 1.0 Compliant • SMBus Address Input/LOCATION Input to UDID • Programmable Over/Undertemperature Limits • Programmable Fault Queue • SMBusALERT Output • Fail−Safe Overtemperature Comparator Output • Fan Speed (RPM) Controller • Look−Up Table for Temperature−to−Fan Speed Control • Linear and Discrete Options for Look−Up Table • FAN_FAULT Output • THERM Input, Used to Time PROCHOT Assertions • REF Input, Used as Reference for THERM (PROCHOT) • 3.0 V to 5.5 V Supply • Small 16−Lead QSOP Package • This is a Pb−Free Device APPLICATIONS • Desktop and Notebook PCs • Embedded Systems • Telecommunications Equipment • LCD Projectors http://onsemi.com PIN ASSIGNMENT (Top View) 1 2 3 4 5 6 7 8 14 13 12 11 10 9 TACH1 DRIVE2 TACH2 THERM VCC GND DRIVE1 SDA LOCATION D2– D2+ SCL ADM1034 FAN_FAULT/REF ALERT D1− D1+ 16 15 See detailed ordering and shipping information in the package dimensions section on page 38 of this data sheet. ORDERING INFORMATION MARKING DIAGRAM # = Pb−Free Package YYWW = Date Code 1034A RQZ #YYWW QSOP−16 CASE 492 |
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