Datasheet
ADS5421
7
SBAS237E
www.ti.com
TYPICAL CHARACTERISTICS (Cont.)
T
A
= 25°C, +V
SA
= +V
SD
= +5V, differential input range = 1.5V to 3.5V each input (4V
PP
), sampling rate = 40MSPS, internal reference, and VDRV = 3V, unless otherwise
noted.
DIFFERENTIAL LINEARITY ERROR
DLE (LSB)
Code
0 2048 4096 6144 8192 10240 12288 14336
16384
0.5
0.4
0.3
0.2
0.1
0.0
–0.1
–0.2
–0.3
–0.4
–0.5
F
IN
= 1MHz
INTEGRAL LINEARITY ERROR
ILE (LSB)
Code
0 2048 4096 6144 8192 10240 12288 14336
16384
4
3
2
1
0
–1
–2
–3
–4
F
IN
= 1MHz
SFDR AND SNR vs INPUT FREQUENCY
(F
CLK
= 40MHz)
SFDR, SNR (dBFS)
F
IN
(MHz)
1.0 10
100
100
90
80
70
60
50
40
SFDR
SNR
SFDR AND SNR vs CLOCK FREQUENCY
(F
IN
= 15MHz)
SFDR, SNR (dBFS)
F
CLK
(MHz)
10 15 20 25 30 35
40
90
85
80
75
70
65
60
SFDR
SNR
SFDR AND SNR vs CLOCK FREQUENCY
(F
IN
= 10MHz)
SFDR, SNR (dBFS)
90
85
80
75
70
65
60
SFDR
SNR
F
CLK
(MHz)
10 15 20 25 30 35
40
SWEPT POWER (SFDR)
(F
IN
= 10MHz)
SFDR (dBFS, dBc)
Input Amplitude (dBFS)
–60 –40–50
–30 –20 –10
0
120
110
100
90
80
70
60
50
40
30
20
10
0
dBFS
dBc