Datasheet

(V
AVDD
= 1.8V, V
DVDD
= 1.8V, V
OVDD
= 1.8V, V
REFVDD
= 3.6V, f
SAMPLE
= 1.6Msps, V
REF
= 3.3V, Internal Ref Buffer On,
T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
-4
-2
0
2
4
-40 -25 -10 5 20 35 50 65 80 95 110 125
ERROR (LSB)
TEMPERATURE (°C)
OFFSET (LSB)
GAIN ERROR (LSB)
OFFSET AND GAIN ERROR vs. TEMPERATURE
V
REF
= 3.3V
V
REFVDD
= 3.6V
toc9
-1.5
-1.0
-0.5
0.0
0.5
2.7 2.8 2.9 3 3.1 3.2 3.3 3.4 3.5 3.6
OFFSET ERROR (LSB)
V
REFVDD
(V)
V
REF
= 2.5V
V
AVDD
= 1.8V
OFFSET ERROR vs. REFVDD VOLTAGE
toc11
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6
INL (LSB)
V
REFVDD
(V)
INL vs. V
REFVDD
SUPPLY VOLTAGE
MAX INL (LSB)
MIN INL (LSB)
V
AVDD
= 1.8V
V
REF
= 2.5V
toc7
-0.25
-0.15
-0.05
0.05
0.15
0.25
1.7 1.75 1.8 1.85 1.9
OFFSET ERROR (LSB)
V
AVDD
(V)
V
REF
= 3.3V
V
REFVDD
= 3.6V
OFFSET ERROR vs. AVDD SUPPLY VOLTAGE
toc10
0
10000
20000
30000
40000
131035 131036 131037 131038 131039 131040 131041 131042 131043
NUMBER OF OCCURRENCES
OUTPUT CODE (DECIMAL)
OUTPUT NOISE HISTOGRAM
toc12
STDEV = 1.1 LSB
-0.5
-0.4
-0.3
-0.2
-0.1
0.0
0.1
0.2
0.3
0.4
0.5
2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6
DNL (LSB)
V
REFVDD
(V)
DNL vs. V
REFVDD
SUPPLY VOLTAGE
MAX DNL (LSB)
MIN DNL (LSB)
V
AVDD
= 1.8V
V
REF
= 2.5V
toc8
Maxim Integrated │ 9
www.maximintegrated.com
MAX11903 18-Bit, 1.6Msps, Low-Power,
Fully Differential SAR ADC
Typical Operating Characteristics (continued)