Datasheet

AD7298-1
Rev. A | Page 9 of 24
TYPICAL PERFORMANCE CHARACTERISTICS
–110
–90
–70
–50
–30
–100
–80
–60
–40
–20
–10
0
0 100 200 300
FREQUENCY (MHz)
SIGNAL POWER (dB)
400 500 600
V
DD
= V
DRIVE
= 3V
f
SAMPLE
= 1.17647MHz
f
IN
= 50kHz
f
SCLK
= 20MHz
SNR = 61.83dB
THD = –80.23dB
09321-047
Figure 3. Typical FFT
–1.0
–0.8
–0.6
0.6
0.4
0.2
0
0.2
0.4
0.8
1.0
1 101 201 301 401 501 601 701 801 901 1001
INL (LSB)
CODE
V
DD
= 3V
V
DRIVE
= 3V
09321-040
Figure 4. Typical ADC INL
–1.0
–0.8
–0.6
–0.4
0.6
0.4
0.2
0
0.2
0.8
1.0
1 101 201 301 401 501 601 701 801 901 1001
DNL (LSB)
CODE
V
DD
= 3V
V
DRIVE
= 3V
09321-041
Figure 5. Typical ADC DNL
–0.50
–0.40
–0.30
–0.20
–0.10
0
0.10
0.20
0.30
0.40
0.50
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6
INL (LSB)
V
REF
(V)
INL (Positive)
INL (Negative)
09321-038
Figure 6. INL vs. V
REF
–0.50
–0.40
–0.30
–0.20
–0.10
0
0.10
0.20
0.30
0.40
0.50
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6
DNL (LSB)
V
REF
(V)
INL (Positive)
INL (Negative)
09321-039
Figure 7. DNL vs. V
REF
2
3
4
5
6
7
8
9
10
11
0 0.5 1.0 1.5 2.0 2.5
EFFECTIVE NUMBER OF BITS
EXTERNAL VOLTAGE REFERENCE (V)
V
DD
= 3V
V
DRIVE
= 3V
09321-042
Figure 8. Effective Number of Bits vs. V
REF