ADM1034
http://onsemi.com
2
Figure 1. Functional Block Diagram
ADM1034
FAN SPEED
CONTROLLER
ALERT
1
DRIVE1
SCL
3
2
4
8
13
9
10
11
12
DRIVE2
TACH1
TACH2
REF
LOCATION
D1
D1+
D2
D2+
TACH SIGNAL
CONDITIONING
SRC
BLOCK
BAND GAP
TEMPERATURE
SENSOR
ANALOG
MULTIPLEXER
FAN
SPEED
COUNTER
FAN RESPONSE
TEMPERATURE
TO FAN SPEED
LOOK-UP TABLE
MANUAL FAN
SPEED CONTROL
REGISTERS
ADC
BAND GAP
REFERENCE
THERM
SMBUS
ADDRESS
SERIAL BUS
INTERFACE
ADDRESS
POINTER
REGISTER
STATUS
REGISTER
LIMIT
COMPARATOR
VALUE AND
LIMIT
REGISTERS
FAULT
QUEUE
HYSTERESIS
REGISTERS
OFFSET
REGISTERS
CONVERSION
RATE REGISTER
CONFIGURATION
REGISTERS
GND
5
V
CC
6
MASK
REGISTERS
FAULT
QUEUE
THERM
 PERCENT
TIMER
SDA
FAN_FAULT
SDA
ALERT
THERM
16
15
8
14
7
Table 1. ABSOLUTE MAXIMUM RATINGS
Parameter
Rating
Unit
Positive Supply Voltage (V
CC
)
0.3, +6.5
V
Voltage on Any Input or Output Pin except FAN_FAULT
 and LOCATION
0.3 to V
DD
+ 6.5
V
Voltage on FAN_FAULT
 (Note 1)
V
CC
Voltage on LOCATION
V
CC
 + 0.3
V
Input Current at Any Pin
?0
mA
Maximum Junction Temperature (T
J
 
MAX
)
150
Storage Temperature Range
65 to +150
Lead Temperature, Soldering (10 s)
300
IR Reflow Peak Temperature
220
ESD Rating  All Pins
1500
V
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1.  During powerup the voltage on FAN_FAULT
 should not be higher than V
CC
.
NOTE:   This device is ESD sensitive. Use standard ESD precautions when handling.
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