Datasheet

AD7626 Data Sheet
Rev. B | Page 10 of 28
TYPICAL PERFORMANCE CHARACTERISTICS
VDD1 = 5 V; VDD2 = 2.5 V; VIO = 2.5 V; REF = 4.096 V; all plots at 10 MSPS unless otherwise noted. FFT plots for 2 MHz, 3 MHz, and
5 MHz input tones use band pass filter (±400 kHz pass bandwidth around fundamental frequency).
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0 3010 50 70 90
AMPLITUDE (dB)
FREQUENCY (kHz)
INPUT FREQUENCY = 10.37kHz
SNR = 91.85dB
SINAD = 91.8dB
THD = –112.1dB
SFDR = 112.85dB
32k SAMPLES
07648-108
Figure 5. 10 kHz, −0.5 dB Input Tone, Zoomed View
0
–20
–40
–60
FIFTH
HARMONIC
THIRD
HARMONIC
SECOND
HARMONIC
–80
–100
–120
–140
–160
–180
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
AMPLITUDE (dB)
FREQUENCY (MHz)
INPUT FREQUENCY = 2.0026MHz
–0.5dB INPUT AMPLITUDE
SNR = 87.4dBFS
SINAD = 84.8dBFS
THD = –87.9dB
SFDR = 88.1dB
64k SAMPLES
07648-402
Figure 6. FFT, 2 MHz, −0.5 dB Input Tone, Wide View
0
–20
–40
–60
SECOND
HARMONIC
THIRD
HARMONIC
–80
–100
–120
–140
–160
–180
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
AMPLITUDE (dB)
FREQUENCY (MHz)
INPUT FREQUENCY = 3.00125MHz
–0.5dB INPUT AMPLITUDE
SNR = 87.1dBFS
SINAD = 81.2dBFS
THD = –82.0dB
SFDR = 82.1dB
64k SAMPLES
07648-404
FOURTH
HARMONIC
FIFTH
HARMONIC
Figure 7. FFT, 3 MHz, −0.5 dB Input Tone, Wide View
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0 5.04.54.03.53.02.52.01.51.00.5
AMPLITUDE (dB)
FREQUENCY (MHz)
07648-118
INPUT FREQUENCY = 100kHz
SNR = 91.323dB
SINAD = 91.047dB
THD = –102.543dB
SFDR = 104.529dB
Figure 8.100 kHz, −0.5 dB Input Tone FFT, Full Frequency View
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
FIFTH
HARMONIC
AMPLITUDE (dB)
FREQUENCY (MHz)
INPUT FREQUENCY = 2.0026MHz
–6dB INPUT AMPLITUDE
SNR = 87.6dBFS
SINAD = 87.6dBFS
THD = –101.6dB
SFDR = 101.9dB
64k SAMPLES
07648-409
THIRD
HARMONIC
SECOND
HARMONIC
Figure 9. FFT, 2 MHz, −6 dB Input Tone, Wide View
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
AMPLITUDE (dB)
FREQUENCY (MHz)
INPUT FREQUENCY = 3.00125MHz
–6dB INPUT AMPLITUDE
SNR = 88.48dBFS
SINAD = 88.3dBFS
THD = –97.2dB
SFDR = 98.3dB
64k SAMPLES
07648-411
THIRD
HARMONIC
FOURTH
HARMONIC
SECOND
HARMONIC
FIFTH
HARMONIC
Figure 10. FFT, 3 MHz, −6 dB Input Tone, Wide View