Datasheet

MAX6691
Four-Channel Thermistor Temperature-to-Pulse-
Width Converter
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
Note 1: Specification limits over temperature are guaranteed by design, not production tested.
V
CC
to GND...........................................................-0.3V to +6.0V
All Other Pins to GND.................................-0.3V to (V
CC
+ 0.3V)
I/O, R+, R-, T1–T4 Current................................................±20mA
ESD Protection (Human Body Model) .............................±2000V
Continuous Power Dissipation (T
A
= +70°C)
10-Pin µMAX (derate 5.6mW/°C above +70°C) ........444.4mW
Operating Temperature Range .........................-55°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(V
CC
= 3.0V 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.) (Note1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
T
A
= +25°C, V
CC
= 3.3V 0.5
T
HIGH
/T
LOW
Accuracy V
REXT
T
A
= T
MIN
to T
MAX
1.0
% FS
Supply Voltage Range V
CC
3.0 5.5 V
Supply Current I
CC
During conversion, no load
300 600
µA
Sleep-Mode Supply Current
I
STANDBY
3.5 10 µA
Input Leakage Current
I
LEAKAGE
1.0 µA
Reference Voltage Output V
REF
I
REF
= 1mA, T
A
= +25°C
1.19 1.24 1.32
V
Reference Load Regulation 0 < I
REF
< 2mA 0.1 0.2 %
Reference Supply Rejection 0.2 %
Logic Input Low Voltage V
IL
0.3
✕
V
CC
V
Logic Input High Voltage V
IH
0.7
✕
V
CC
V
TIMING CHARACTERISTICS
(V
CC
= 3.0V 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.)
(Figure 1) (Note1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
Glitch Immunity on I/O Input
500
ns
Conversion Time t
CONV
86
102 156
ms
Nominal Pulse Width t
LOW
4.0 4.9 7.5 ms
Start Pulse Width t
START
5µs
Data Ready Pulse Width t
READY
103 122 188
µs
Error Pulse Width t
ERROR
103 122 188
µs
Rise Time t
RISE
C
L
= 15pF, R
L
= 10kΩ
600
ns
Fall Time t
FALL
C
L
= 15pF, R
L
= 10kΩ
600
ns