Datasheet

MAX6682
Thermistor-to-Digital Converter
_______________________________________________________________________________________ 3
TIMING CHARACTERISTICS
(V
CC
= 3V to 5.5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are specified at V
CC
= 3.3V and T
A
= +25°C.) (Note 2)
Note 1: All specifications are 100% tested at T
A
= +25°C. Specification limits over temperature are guaranteed by design,
not production tested.
Note 2: Guaranteed by design.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SERIAL INTERFACE TIMING (Figures 5 and 6)
Serial Clock Frequency f
SCL
5 MHz
SCK Pulse High Width t
CH
50 ns
SCK Pulse Low Width t
CL
50 ns
CS Fall to SCK Rise t
CSS
35 ns
CS Fall to Output Data Valid t
DV
C
L
= 10pF 35 ns
SCK Fall to Output Data Valid t
DO
C
L
= 10pF 35 ns
CS Rise to Output High-Z t
TR
C
L
= 10pF 25 ns
SCK Fall to Output High-Z t
HIZ
C
L
= 10pF 35 ns
CS Pulse Width t
CSW
75 ns
Typical Operating Characteristics
(V
CC
= 5V, thermistor = 10k nominal, R
EXT
= 7680Ω, T
A
= +25°C, unless otherwise noted.)
0
0.3
0.2
0.1
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0105152025
TEMPERATURE ERROR
vs. POWER-SUPPLY NOISE FREQUENCY
MAX6682 toc01
FREQUENCY (MHz)
TEMPERATURE ERROR (°C)
V
IN
= SQUARE WAVE
APPLIED TO V
CC
WITH
NO V
CC
BYPASS CAPACITOR
V
IN
= 250mV
P-P
40
60
50
80
70
90
100
1k 100k10k 1M 10M
AVERAGE SUPPLY CURRENT
vs. CLOCK FREQUENCY
MAX6682 toc02
SCK FREQUENCY (Hz)
SUPPLY CURRENT (µA)
SCK IS DRIVEN
RAIL-TO-RAIL
®
30
50
40
70
60
90
80
100
3.0 4.03.5 4.5 5.0 5.5
AVERAGE SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX6682 toc03
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.