Datasheet

AD9243
REV. A
–6–
Typical Differential AC Characterization Curves/Plots
(AVDD = +5 V, DVDD = +5 V, DRVDD = +5 V, f
SAMPLE
= 3.00 MSPS, T
A
= +258C, Differential Input)
INPUT FREQUENCY – Hz
SINAD – dB
90
85
50
100k 1M 20M10M
80
75
55
70
65
60
–0.5dBFS
–6.0dBFS
–20.0dBFS
14.7
13.8
8.0
13.0
12.2
8.8
11.3
10.5
9.7
ENOB – Bits
Figure 2. SINAD vs. Input Frequency
(Input Span = 5 V, V
CM
= 2.5 V)
INPUT FREQUENCY – Hz
SINAD – dB
100k 1M 20M10M
–0.5dBFS
–20.0dBFS
14.7
13.8
8.0
13.0
12.2
8.8
11.3
10.5
9.7
ENOB – Bits
90
85
80
75
70
65
60
55
50
–6.0dBFS
Figure 5. SINAD vs. Input Frequency
(Input Span = 2 V, V
CM
= 2.5 V)
SAMPLE RATE – MSPS
–60
–65
–100
0.1 1 5
5V SPAN
2V SPAN
–70
–75
–95
–80
–85
–90
THD – dB
Figure 8. THD vs. Sample Rate
(f
IN
= 1.5 MHz, A
IN
= –0.5 dBFS,
V
CM
= 2.5 V)
–0.5dBFS
–6.0dBFS
–20.0dBFS
INPUT FREQUENCY – Hz
THD – dB
–40
–50
–100
100k 1M
20M
10M
–70
–80
–90
–60
Figure 3. THD vs. Input Frequency
(Input Span = 5 V, V
CM
= 2.5 V)
–0.5dBFS
–6.0dBFS
–20.0dBFS
INPUT FREQUENCY – Hz
THD – dB
–40
–50
–100
100k 1M 20M10M
–70
–80
–90
–60
Figure 6. THD vs. Input Frequency
(Input Span = 2 V, V
CM
= 2.5 V)
AIN – dBFS
SFDR – dBc AND dBFS
110
40
–60 –50 0
–40 –30 –20 –10
100
90
80
60
50
70 dBc – 5V
dBc – 2V
dBFS – 5V
dBFS – 2V
Figure 9. Single Tone SFDR
(f
IN
= 1.5 MHz, V
CM
= 2.5 V)
9
3
4
2
8
5
7
6
0
–15
–30
–45
–60
–75
–90
–105
–120
–135
–150
0 1.5
FREQUENCY – MHz
AMPLITUDE – dB
1
Figure 4. Typical FFT, f
IN
= 500 kHz
(Input Span = 5 V, V
CM
= 2.5 V)
9
3
4
2
8
5
7
6
1
0
–15
–30
–45
–60
–75
–90
–105
–120
–135
–150
0 1.5
FREQUENCY – MHz
AMPLITUDE – dB
Figure 7. Typical FFT, f
IN
= 1.50 MHz
(Input Span = 2 V, V
CM
= 2.5 V)
INPUT POWER LEVEL (F
1
= F
2
) – dBFS
WORST CASE SPURIOUS – dBc AND dBFS
110
60
–40 –35 0
–30 –25 –20 –15 –10 –5
105
90
85
75
65
100
95
80
70
5V SPAN - dBFS
5V SPAN - dBc
2V SPAN - dBFS
2V SPAN - dBc
Figure 10. Dual Tone SFDR
(f
1
= 0.95 MHz, f
2
= 1.04 MHz,
V
CM
= 2.5 V)