Rainbow Electronics MAX1669 User Manual
Page 2
MAX1669
Fan Controller and Remote Temperature Sensor
with SMBus Serial Interface
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +3.3V, T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
CC
to AGND...........................................................-0.3V to +6V
DXP, ADD_ to AGND.................................-0.3V to (V
CC
+ 0.3V)
DXN to AGND.......................................................-0.3V to +0.8V
SMBCLK, SMBDATA, ALERT, SYNC,
I/O1, I/O2, OVERT, FAN to AGND ......................-0.3V to +6V
FAN to PGND ............................................-0.3V to (V
CC
+ 0.3V)
PGND to AGND ....................................................-0.3V to +0.3V
PWM Current....................................................-50mA to +50mA
SMBDATA Current .............................................-1mA to +50mA
I/O1, I/O2 Current...............................................-1mA to +25mA
DXN Current ......................................................................±1mA
ESD Protection (all pins, Human Body Model) .................2000V
Continuous Power Dissipation (T
A
= +70°C)
16-Pin QSOP (derate 8.30mW/°C above +70°C).......667mW
Operating Temperature Range (extended) ......-55°C to +125°C
Junction Temperature .....................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
FAN output set to
DAC mode
FAN output set to
150Hz mode
T
R
= 0°C to +100°C, diode ideality factor = 1.013
High level
PWM mode, V
FAN
forced to 0.4V
PWM mode, V
FAN
forced to 2.9V
Monotonicity guaranteed
V
DXP
forced to V
DXN
+ 0.65V
SMBus static
Autoconvert mode
From stop bit to conversion complete
V
CC
, falling edge
V
CC
input, disables A/D conversion,
rising edge
Autoconvert mode,
average measured over 1s
CONDITIONS
mA
-10
FAN Output Sink Current
mA
10
FAN Output Source Current
V
0.7
DXN Source Voltage
80
100
120
µA
Remote-Diode Source Current
Hz
1.6
2
2.4
Conversion Rate
ms
47
62
78
Conversion Time
µA
360
µA
75
150
Average Operating Supply Current
°C
Temperature Error, Remote Diode (Note 2)
Bits
8
Resolution (Note 1)
3
10
µA
Standby Supply Current
mV
50
POR Threshold Hysteresis
V
1
1.9 2.5
Power-On Reset Threshold
-3
3
V
3
5.5
Supply Voltage Range
V
2.6 2.8 2.95
Undervoltage Lockout Threshold
mV
50
Undervoltage Lockout Hysteresis
UNITS
MIN
TYP
MAX
PARAMETER
SMBCLK at 10kHz
3
Low level
8
10
12
ADC AND POWER SUPPLY
FAN OUTPUT