AD9257 Analog Devices, AD9257 Datasheet - Page 14

• Manufacturer Part Number: AD9257
• Description: Octal, 14-Bit, 40/65 MSPS Serial LVDS 1.8 V A/D Converter
• Manufacturer: Analog Devices

AD9257
AD9257-40
Figure 22. Single-Tone 16k FFT with f
Figure 21. Single-Tone 16k FFT with f
Figure 23. Two-Tone 16k FFT with f
–105
–120
–135
–105
–120
–135
–105
–120
–135
–15
–30
–45
–60
–75
–90
–15
–30
–45
–60
–75
–90
–15
–30
–45
–60
–75
–90
0
0
0
2
2
F2 – F1
2
4
4
4
6
6
2F2 – F1
6
f
SAMPLE
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
8
8
8
+
= 40 MSPS
10
10
10
IN
IN1
IN
= 30.5 MHz, f
= 9.7 MHz, f
= 8 MHz and f
40MSPS
9.7MHz AT –1dBFS
SNR = 74.8dB (75.8dBFS)
SFDR = 96.9dBc
40MSPS
30.5MHz AT –1dBFS
SNR = 74.6dB (75.6dBFS)
SFDR = 98.8dBc
12
12
2F1 – F2
12
2F1 + F2
14
14
14
2F2 + F1
SAMPLE
SAMPLE
16
16
16
IN2
= 10 MHz,
= 40 MSPS
= 40 MSPS
F1 + F2
18
18
18
Rev. 0 | Page 14 of 40
Figure 24. Single-Tone 16k FFT with f
Figure 25. Single-Tone 16k FFT with f
–100
–120
Figure 26. Two-Tone SFDR/IMD3 vs. Input Amplitude (AIN) with
–105
–120
–135
–105
–120
–135
–20
–40
–60
–80
–15
–30
–45
–60
–75
–90
–15
–30
–45
–60
–75
–90
0
–90
0
0
f
IN1
= 30 MHz and f
2
2
SFDR (dBFS)
–78
IMD3 (dBc)
4
4
IMD3 (dBFS)
–66
INPUT AMPLITUDE (dBFS)
6
6
SFDR (dBc)
FREQUENCY (MHz)
FREQUENCY (MHz)
IN2
–54
8
8
= 32 MHz, f
10
10
IN
IN
–42
= 19.7 MHz, f
= 69.5 MHz, f
40MSPS
19.7MHz AT –1dBFS
SNR = 74.9dB (75.9dBFS)
SFDR = 94.6dBc
40MSPS
69.5MHz AT –1dBFS
SNR = 73.7dB (74.7dBFS)
SFDR = 87.9dBc
12
12
SAMPLE
–30
14
14
= 40 MSPS
Data Sheet
SAMPLE
SAMPLE
16
16
–18
= 40 MSPS
= 40 MSPS
18
18
–6