AD7626 Analog Devices, AD7626 Datasheet - Page 11

• Manufacturer Part Number: AD7626
• Description: 16-Bit, 10 MSPS, PulSAR Differential ADC
• Manufacturer: Analog Devices

Specifications of AD7626

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: 10MSPS
• Interface: LVDS,Ser
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p
• Adc Architecture: SAR
• Pkg Type: CSP

–100
–120
–140
–160
–180
–100
–120
–140
–160
–180
Figure 13. THD vs. Input Amplitudes at Input Frequency Tones of
–100
–105
–110
–115
–20
–40
–60
–80
–20
–40
–60
–80
–75
–80
–85
–90
–95
0
0
–18
0
0
Figure 11. FFT, 5 MHz, −0.5 dB Input Tone, Wide View
HARMONIC
INPUT FREQUENCY = 5.00656128MHz
–0.5dB INPUT AMPLITUDE
SNR = 86.7dBFS
SINAD = 83.2dBFS
THD = –85.3dB
SFDR = 86.1dB
64k SAMPLES
INPUT FREQUENCY = 5.00656128MHz
–6dB INPUT AMPLITUDE
SNR = 88.4dBFS
SINAD = 88.0dBFS
THD = –92.4dB
SFDR = 92.8dB
64k SAMPLES
HARMONIC
Figure 12. FFT, 5 MHz, −6 dB Input Tone, Wide View
SECOND
SECOND
HARMONIC
0.5
0.5
FOURTH
HARMONIC
FOURTH
–15
1.0
1.0
2MHz
1.5
1.5
INPUT AMPLITUDE (dBFS)
10 kHz to 9.7 MHz
–12
FREQUENCY (MHz)
FREQUENCY (MHz)
2.0
2.0
2.5
2.5
–9
5MHz
3MHz
3.0
3.0
–6
3.5
3.5
9.7MHz
FUNDAMENTAL
4.0
4.0
HARMONIC
HARMONIC
HARMONIC
FIFTH
FIFTH
–3
HARMONIC
THIRD
THIRD
4.5
4.5
1MHz
5.0
5.0
0
Rev. A | Page 11 of
Figure 16. THD and SNR vs. Input Frequency (−0.5 dB Input Tone)
–100
–120
–140
–160
–180
–100
–120
–140
–160
–180
94
92
90
88
86
84
82
80
–20
–40
–60
–80
–20
–40
–60
–80
10k
0
0
4.50
4.50
Figure 14. FFT, 5 MHz, −0.5 dB Input Tone Zoomed View
Figure 15. FFT, 5 MHz, −0.5 dB Input Tone Zoomed View
INPUT FREQUENCY = 5.00656128MHz
–0.5dB INPUT AMPLITUDE
SNR = 86.7dBFS
SINAD = 83.2dBFS
THD = –85.3dB
SFDR = 86.1dB
64k SAMPLES
INPUT FREQUENCY = 5.00656128MHz
–6dB INPUT AMPLITUDE
SNR = 88.4dBFS
SINAD = 88.0dBFS
THD = –92.4dB
SFDR = 92.8dB
64k SAMPLES
4.55
4.55
4.60
4.60
100k
INPUT FREQUENCY (Hz)
4.65
4.65
SNR
THD
FREQUENCY (MHz)
FREQUENCY (MHz)
4.70
4.70
4.75
4.75
4.80
4.80
1M
4.85
FIFTH HARMONIC
4.85
HARMONIC
FUNDAMENTAL
FUNDAMENTAL
FIFTH
4.90
4.90
HARMONIC
HARMONIC
THIRD
THIRD
4.95
4.95
AD7626
10M
5.00
5.00
–50
–60
–70
–80
–90
–100
–110