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?Semiconductor Components Industries, LLC, 2012
April, 2012  Rev. 4
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
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> 1 Local and 2 Remote Temperature Channels
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> ?/SPAN>1?/SPAN>C Accuracy on Local and Remote Channels
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> Automatic Remote Temperature Channels, Up to 1 kW
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> Fast (Up to 64 Measurements per Second)
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> SMBus 2.0, 1.1, and 1.0 Compliant
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> SMBus Address Input/LOCATION Input to UDID
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> Programmable Over/Undertemperature Limits
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> Programmable Fault Queue
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> SMBusALERT
 Output
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> Fail-Safe Overtemperature Comparator Output
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> Fan Speed (RPM) Controller
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> Look-up Table for Temperature-to-Fan Speed Control
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> Linear and Discrete Options for Look-up Table
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> FAN_FAULT
 Output
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> THERM
 Input, Used to Time PROCHOT
 Assertions
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> REF Input, Used as Reference for THERM
 (PROCHOT
)
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> 3.0 V to 5.5 V Supply
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> Small 16-lead QSOP Package
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> This is a Pb-Free Device*
Applications
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> Desktop and Notebook PCs
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> Embedded Systems
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> Telecommunications Equipment
?SPAN class="pst ADM1034ARQZ-REEL_2295499_4"> LCD Projectors
* For additional information on our Pb-Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
http://onsemi.com
See detailed ordering and shipping information in the package
dimensions section on page 37 of this data sheet.
ORDERING INFORMATION
MARKING DIAGRAM
QSOP16
CASE 492
PIN ASSIGNMENT
(Top View)
ALERT
SCL
SDA
LOCATION
D2+
D1+
D1
D2
DRIVE1
TACH1
DRIVE2
TACH2
GND
V
CC
THERM
FAN_FAULT
/REF
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
ADM1034
1034ARQZ  = Specific Device Code
#
= Pb-Free Package
YY
= Date Code
WW
= Work Week
1034A
RQZ
#YYWW
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