Datasheet

ADS822, ADS825
6
SBAS069B
UNDERSAMPLING
(Differential Input, 2Vp-p)
Frequency (MHz)
Magnitude (dB)
0
–20
–40
–60
–80
–100
0 5 10 15 20
f
S
= 40MHz
f
IN
= 75MHz
SNR = 59dBFS
SFDR = 66dBFS
2-TONE INTERMODULATION DISTORTION
Frequency (MHz)
Magnitude (dB)
0
–20
–40
–60
–80
–100
0 5 10 15 20
f
1
= 9.5MHz at –7dBFS
f
2
= 9.9MHz at –7dBFS
IMD (3) = –67dB
ELECTRICAL CHARACTERISTICS (Cont.)
At T
A
= full specified temperature range, V
S
= +5V, single-ended input range = 1.5V to 3.5V, sampling rate = 40MHz, and external reference, unless otherwise noted.
SWEPT POWER SFDR
Input Amplitude (dBFS)
100
80
60
40
20
0
–60 –50 –40 –30 –10–20 0
SFDR (dBFS, dBc)
dBc
dBFS
DIFFERENTIAL LINEARITY ERROR
Output Code
DLE (LSB)
1.0
0.5
0
–0.5
–1.0
0 128 256 512 768 1024
f
IN
= 1MHz
DIFFERENTIAL LINEARITY ERROR
Output Code
DLE (LSB)
1.0
0.5
0
–0.5
–1.0
0 128 256 512 768 1024
f
IN
= 10MHz
INTEGRAL LINEARITY ERROR
Output Code
ILE (LSB)
2.0
1.0
0
–1.0
–2.0
0 256 512 768 1024