MAX1149 Maxim Integrated Products, MAX1149 Datasheet - Page 8

• Manufacturer Part Number: MAX1149
• Description: (MAX1146 - MAX1149) 14-Bit ADCs
• Manufacturer: Maxim Integrated Products

Multichannel, True-Differential,
Serial, 14-Bit ADCs
(V
(50% duty cycle), 18 clocks/conversion (116ksps), V
nal +2.500V reference at REF (MAX1147/MAX1149), C
8
DD
4.0980
4.0975
4.0970
4.0965
4.0960
4.0955
4.0950
4.0945
4.0940
w
_______________________________________________________________________________________
= +5.0V (MAX1146/MAX1148), V
REFERENCE VOLTAGE vs. SUPPLY VOLTAGE
4.75
w
4.85
(MAX1146/MAX1148)
SUPPLY VOLTAGE (V)
w
2.503
2.502
2.501
2.500
2.499
2.498
2.497
-100
-110
-120
4.95
-10
-20
-30
-40
-50
-60
-70
-80
-90
20
10
0
REFERENCE VOLTAGE vs. TEMPERATURE
-40
0
.
5.05
1000
-15
(MAX1147/MAX1149)
D
5.15
2000
TEMPERATURE (°C)
FREQUENCY (Hz)
10
FFT PLOT
DD
3000
5.25
a
= +3.3V (MAX1147/MAX1149), SHDN = V
f
f
V
IN
SAMPLE
35
DD
= 1kHz
4000
= 5V/3V
2.5020
2.5015
2.5010
2.5005
2.5000
2.4995
2.4990
2.4985
2.4980
t
= 116ksps
Typical Operating Characteristics (continued)
60
5000
REFERENCE VOLTAGE vs. SUPPLY VOLTAGE
2.7
REFADJ
a
REF
85
= 2.2µF, C
S
(MAX1147/MAX1149)
= V
SUPPLY VOLTAGE (V)
3.0
DD
, external +4.096V reference at REF (MAX1146/MAX1148), exter-
h
LOAD
3.3
e
= 50pF, T
2500
2000
1500
1000
500
13.0
12.9
12.8
12.7
12.6
12.5
12.4
12.3
12.2
12.1
12.0
e
0
0.001
A
REFERENCE BUFFER POWER-UP DELAY
1
3.6
DD
C
C
= +25°C, unless otherwise noted.)
REF
REFADJ
, V
t
EFFECTIVE NUMBER OF BITS
= 4.7µF
10
COM
vs. TIME IN SHUTDOWN
0.01
= 0.01µF
4.100
4.099
4.098
4.097
4.096
4.095
4.094
4.093
4.092
4.091
4.090
TIME IN SHUTDOWN (s)
vs. FREQUENCY
4
19
FREQUENCY (kHz)
= 0, f
REFERENCE VOLTAGE vs. TEMPERATURE
-40
0.1
28
SCLK
U
-15
(MAX1146/MAX1148)
37
= 2.1MHz, external clock
TEMPERATURE (°C)
1
.
10
46
c
10
35
55
o
60
m
85