Datasheet

MAX11638/MAX11639/MAX11642/MAX11643
8-Bit, 16-/8-Channel, 300ksps ADCs
with FIFO and Internal Reference
6 _______________________________________________________________________________________
DIFFERENTIAL NONLINEARITY
vs. OUTPUT CODE
MAX11638 toc04
OUTPUT CODE (DECIMAL)
INL (LSB)
-0.1
MAX11639/MAX11643
0
0.1
0.2
-0.2
025664 128 192
SINAD vs. FREQUENCY
MAX11638 toc05
FREQUENCY (kHz)
SINAD (dB)
10010
48.5
49.0
49.5
50.0
50.5
51.0
51.5
52.0
48.0
11000
MAX11639/MAX11643
MAX11638/MAX11642
SFDR vs. FREQUENCY
MAX11638 toc06
FREQUENCY (kHz)
SFDR (dB)
10010
65
70
75
80
60
1 1000
MAX11638/MAX11642
MAX11639/MAX11643
SUPPLY CURRENT vs. SAMPLING RATE
MAX11638 toc09
SAMPLING RATE (ksps)
I
DD
(µA)
10010
200
400
600
800
1000
1200
1400
1600
1800
0
1 1000
MAX11639/MAX11643
INTERNAL
REFERENCE
EXTERNAL
REFERENCE
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX11638 toc10
V
DD
(V)
I
DD
(µA)
5.205.154.80 4.85 4.90 5.00 5.054.95 5.10
1200
1400
1600
1800
2000
2200
2400
2600
1000
4.75 5.25
MAX11638/MAX11642
INTERNAL
REFERENCE
EXTERNAL
REFERENCE
THD vs. FREQUENCY
MAX11638 toc07
FREQUENCY (kHz)
THD (dB)
10010
-90
-80
-70
-60
-50
-100
11000
MAX11638/MAX11642
MAX11639/MAX11643
SUPPLY CURRENT vs. SAMPLING RATE
MAX11638 toc08
SAMPLING RATE (ksps)
I
VDD
(µA)
10010
500
1000
1500
2000
2500
3000
0
1 1000
MAX11638/MAX11642
INTERNAL
REFERENCE
EXTERNAL
REFERENCE
Typical Operating Characteristics (continued)
(V
DD
= 3V and V
REF
= 2.5V (MAX11639/MAX11643), V
DD
= 5V and V
REF
= 4.096V (MAX11638/MAX11642), f
SCLK
= 4.8MHz,
C
LOAD
= 30pF, f
SAMPLE
= 300ksps, T
A
= +25°C, unless otherwise noted.)