MAX11644/MAX11645
Low-Power, 1-/2-Channel, I
2
C, 12-Bit ADCs
in Ultra-Tiny 1.9mm x 2.2mm Package
_______________________________________________________________________________________
7
OFFSET ERROR vs. TEMPERATURE
MAX11644 toc11
TEMPERATURE (°C)
OFFSET ERROR (LSB)
806535 50-10 5 20-25
-0.9
-0.8
-0.7
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
0
-1.0
-40
OFFSET ERROR vs. SUPPLY VOLTAGE
MAX11644 toc12
V
DD
(V)
OFFSET ERROR (LSB)
5.25.54.74.23.73.2
-1.6
-1.2
-0.8
-0.4
0
0.4
0.8
1.2
1.6
2.0
-2.0
2.7
GAIN ERROR vs. TEMPERATURE
MAX11644 toc13
TEMPERATURE (°C)
GAIN ERROR (LSB)
806535 50-10 5 20-25
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0
-40
GAIN ERROR vs. SUPPLY VOLTAGE
MAX11644 toc14
V
DD
(V)
GAIN ERROR (LSB)
5.25.54.74.23.73.2
-1.6
-1.2
-0.8
-0.4
0
0.4
0.8
1.2
1.6
2.0
-2.0
2.7
0.9990
0.9994
0.9992
0.9998
0.9996
1.0002
1.0000
1.0004
1.0008
1.0006
1.0010
-40 -10 5-25 20 35 50 65 80
INTERNAL REFERENCE VOLTAGE
vs. TEMPERATURE
MAX11644 toc09
TEMPERATURE (°C)
V
REF
NORMALIZED
NORMALIZED TO VALUE AT T
A
= +25°C
MAX11644
MAX11645
0.99990
0.99994
0.99992
0.99998
0.99996
1.00002
1.00000
1.00004
1.00008
1.00006
1.00010
2
.73
.33.63.93.04.24.54.85.15.4
NORMALIZED REFERENCE VOLTAGE
vs. SUPPLY VOLTAGE
MAX11644 toc10
V
DD
(V)
V
REF
(V)
MAX11644
NORMALIZED TO
REFERENCE VALUE AT
V
DD
= 5V
MAX11645
NORMALIZED TO
REFERENCE VALUE AT
V
DD
= 3.3V
Typical Operating Characteristics (continued)
(V
DD
= 3.3V (MAX11645), V
DD
= 5V (MAX11644), f
SCL
= 1.7MHz, 50% duty cycle, f
SAMPLE
= 94.4ksps, single-ended, unipolar,
T
A
= +25°C, unless otherwise noted.)
