Datasheet

MAX6682
Thermistor-to-Digital Converter
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= 3V to 5.5V, T
A
= -55°C to +125°C, unless otherwise noted. Typical values are specified at V
CC
= 3.3V and T
A
= +25°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.
Supply Voltage (V
CC
to GND) .................................-0.3V to +6V
SO, SCK, CS, R-, R+ to GND ....................-0.3V to (V
CC
+ 0.3V)
R+ Current ........................................................................±20mA
R- Current ...........................................................................±1mA
SCK, CS, SO Current .........................................-1mA to +50mA
ESD Protection (Human Body Model) .............................±2000V
Continuous Power Dissipation (T
A
= +70°C)
8-Pin µMAX (derate 4.1mW/°C above +70°C) ............ 328mW
Operating Temperature Range
(T
MIN
to T
MAX
) ...............................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature .....................................................+150°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage V
CC
3.0 5.5 V
ADC Total Unadjusted Error TUE
DOUT = 768.935 x (V
REXT
/V
R+
) - 134.0923;
V
IN
> 0.1V
REF
-3 +3 LSB
ADC Conversion Time t
CONV
64 80 ms
R- Input Impedance Z
IN
1MΩ
R- Leakage Current 150nA
Conversion Rate 0.5 Hz
Reference Voltage Output V
REF
I
LOAD
= 1mA 1.10 1.22 1.40 V
Reference Load Regulation 0 < I
LOAD
< 2mA 0 0.1 %/mA
Reference Supply Regulation 0.7 mV/V
Conversion Supply Current I
C
During conversion, no load 220 300 µA
Average Supply Current I
A
0.5 conversions/s, no load 17 29 µA
Standby Current I
S
CS low, SCK inactive 3 7 µA
Idle Current I
ID
CS high, analog circuits off 10 17 µA
SERIAL INTERFACE
Input Low Voltage V
IL
0.2 x
V
CC
V
Input High Voltage V
IH
0.8 x
V
CC
V
Input Leakage Current I
LEAK
V
IN
= GND or V
CC
1µA
Output High Voltage V
OH
I
SOURCE
= 1.6mA
V
CC
-
0.4
V
Output Low Voltage V
OL
I
SINK
= 1.6mA 0.4 V