Rainbow Electronics MAX6681 User Manual
Page 2
MAX6680/MAX6681
±1°C Fail-Safe Remote/Local Temperature
Sensors with SMBus Interface
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(Circuit of Typical Operating Circuit, V
CC
= 3.0V to 5.5V, T
A
= -25°C to +125°C, unless otherwise specified. Typical values are at V
CC
= 3.3V and 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
...........................................................................-0.3V to +6V
DXP.............................................................-0.3V to (V
CC
+ 0.3V)
DXN ......................................................................-0.3V to +0.8V
SMBCLK, SMBDATA, ALERT, OVERT .....................-0.3V to +6V
RESET, INT_SEL, STBY, ADD0, ADD1.....................-0.3V to +6V
CRIT1, CRIT0, SENS_SEL ........................................-0.3V to +6V
SMBDATA, ALERT, OVERT, Current ..................-1mA to +50mA
DXN Current ......................................................................±1mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C) ..........664mW
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
1
°C
Temperature Resolution,
Legacy Mode
8
Bits
0.125
°C
Temperature Resolution,
Extended Mode
11
Bits
T
RJ
= +60°C to +100°C, V
CC
= 3.3V
-1.0
+1.0
T
RJ
= +50°C to +120°C, V
CC
= 3.3V
-2.0
+2.0
Rem ote Tem p er atur e E r r or ( N ote 1)
T
RJ
= -55°C to +125°C, V
CC
= 3.3V
-3.0
+3.0
°C
T
A
= +60°C to +100°C, V
CC
= 3.3V
-1.5
+1.5
T
A
= 0°C to +125°C, V
CC
= 3.3V
-3.0
+3.0
Local Temperature Error
T
A
= -55°C to +125°C, V
CC
= 3.3V (Note 2)
-5.0
+5.0
°C
Line Regulation
3.0V
≤ V
CC
≤ 5.5V
0.2
0.6
m
°C/V
Supply Voltage Range
V
CC
3.0
5.5
V
Undervoltage Lockout Threshold
UVLO
Falling edge of V
CC
disables ADC
2.60
2.80
2.95
V
Undervoltage Lockout Hysteresis
90
mV
Power-On Reset (POR)
Threshold
V
CC
, falling edge
1.5
2.0
2.5
V
POR Threshold Hysteresis
90
mV
Legacy
62.5
Conversion Time
Extended
125
ms
Standby Supply Current
SMBus static
3
10
µA
Operating Current
During conversion
0.55
1.0
mA
0.25 conversions/s
35
70
Average Operating Current
(Note 3)
2 conversions/s
120
180
µA
DXP and DXN Leakage Current
In standby mode
2
µA
High level
80
100
120
Remote-Diode Source Current
I
RJ
Low level
8
10
12
µA