ADM1034ARQZ-REEL View Datasheet(PDF) - ON Semiconductor
Part Name
Description
Manufacturer
ADM1034ARQZ-REEL Datasheet PDF : 39 Pages
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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
MARKING
DIAGRAM
QSOP−16
CASE 492
1034A
RQZ
#YYWW
#
= Pb−Free Package
YYWW = Date Code
PIN ASSIGNMENT
DRIVE1 1
TACH1 2
DRIVE2 3
TACH2 4
GND 5
VCC 6
THERM 7
FAN_FAULT/REF 8
ADM1034
16 SCL
15 SDA
14 ALERT
13 LOCATION
12 D2+
11 D2–
10 D1+
9 D1−
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 38 of this data sheet.
© Semiconductor Components Industries, LLC, 2009
1
July, 2009 − Rev. 3
Publication Order Number:
ADM1034/D
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