MAX1669 Datasheet, PDF (2/20 Pages) Maxim Integrated Products – Fan Controller and Remote Temperature Sensor with SMBus Serial Interface

Fan Controller and Remote Temperature Sensor
with SMBus Serial Interface
ABSOLUTE MAXIMUM RATINGS
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
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.
ELECTRICAL CHARACTERISTICS
(V_CC = +3.3V, T_A = 0°C to +85°C, unless otherwise noted. Typical values are at T_A = +25°C.)
PARAMETER
ADC AND POWER SUPPLY
Resolution (Note 1)
CONDITIONS
Monotonicity guaranteed
MIN TYP MAX UNITS
8
Bits
Temperature Error, Remote Diode (Note 2) T_R = 0°C to +100°C, diode ideality factor = 1.013 -3
Supply Voltage Range
3
3
°C
5.5
V
Undervoltage Lockout Threshold
V_CC input, disables A/D conversion,
rising edge
2.6
2.8
2.95
V
Undervoltage Lockout Hysteresis
Power-On Reset Threshold
POR Threshold Hysteresis
Standby Supply Current
V_CC, falling edge
SMBus static
SMBCLK at 10kHz
50
mV
1
1.9
2.5
V
50
mV
3
10
µA
3
Average Operating Supply Current
Autoconvert mode,
average measured over 1s
FAN output set to
150Hz mode
FAN output set to
DAC mode
75
150
µA
360
µA
Conversion Time
From stop bit to conversion complete
47
62
78
ms
Conversion Rate
Remote-Diode Source Current
DXN Source Voltage
FAN OUTPUT
FAN Output Source Current
FAN Output Sink Current
Autoconvert mode
V_DXP forced to V_DXN
+ 0.65V
High level
Low level
PWM mode, V_FAN forced to 2.9V
PWM mode, V_FAN forced to 0.4V
1.6
2
2.4
Hz
80
100
120
µA
8
10
12
0.7
V
10
mA
-10
mA
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