Rainbow Electronics MAX6640 User Manual
Page 2
MAX6640
2-Channel Temperature Monitor with Dual
Automatic PWM Fan-Speed Controller
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +5.5V, T
A
= 0°C to +125°C, unless otherwise noted. Typical values are at V
CC
= +3.3V, T
A
= +85°C.) (Note 1)
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 GND ..............................................................-0.3V to +6V
PWM1, PWM2, TACH1, and TACH2 to GND ......-0.3V to +13.5V
DXP1 and DXP2 to GND ..........................-0.3V to +(V
CC
+ 0.3V)
DXN to GND ..........................................................-0.3V to +0.8V
SCL, SDA,
THERM, OT, FANFAIL,
and ALERT to GND ..............................................-0.3V to +6V
SDA, OT, THERM, ALERT, FANFAIL,
PWM1, and PWM2 Current .............................-1mA to +50mA
DXN Current .......................................................................±1mA
ESD Protection (all pins, Human Body Model) ..................2000V
Continuous Power Dissipation (T
A
= +70°C)
16-Pin QSOP (derated 8.3mW/°C above +70°C) ....... 667mW
16-Pin TQFN 5mm x 5mm
(derated at 33.3mW/°C above +70°C)................2666.7mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Operating Supply Voltage Range
V
CC
+3.0
+5.5
V
Standby Current
SMB static, sleep mode
3
10
µA
Operating Current
Interface inactive, ADC active
0.5
1
mA
V
CC
= +3.3V, +60°C ≤ T
A
≤ +100°C and
+60°C ≤ T
R
≤ +100°C
±1
V
CC
= +3.3V, +40°C ≤ T
A
≤ +100°C and
0°C ≤ T
R
≤ +145°C
±2.5
External Temperature Error
V
CC
= +3.3V,
0°C ≤ T
R
≤ +145°C
±3.8
°C
V
CC
= +3.3V,
+25°C ≤ T
A
≤ +100°C
±2
Internal Temperature Error
V
CC
= +3.3V,
0°C ≤ T
A
≤ +125°C
±4
°C
Supply Sensitivity of Temperature
Measurement
±0.2
°C/V
+0.125
°C
Temperature Resolution
11
Bits
Conversion Time
125
ms
Conversion-Rate Timing Error
-10
+10
%
PWM Frequency Error
-10
+10
%
Tachometer Accuracy
V
CC
= 3.135V to 3.345V,
+60°C ≤ T
A
≤ +85°C
±4
%
High level
70
100
130
Remote-Diode Sourcing Current
Low level
7.0
10
13.0
µA
DXN Source Voltage
0.7
V