Datasheet

AD7760
Rev. A | Page 12 of 36
TYPICAL PERFORMANCE CHARACTERISTICS
AV
DD
1 = DV
DD
= V
DRIVE
= 2.5 V, AV
DD
2 = AV
DD
3 = AV
DD
4 = 5 V, V
REF
= 4.096 V, T
A
= 25°C, normal mode, unless otherwise noted. All
FFTs are generated from 65,536 samples using a 7-term Blackman-Harris window.
04975-006
0 4000 8000 12000 16000 20000
–200
0
–25
–50
–75
–100
–125
–150
–175
24000
FREQUENCY (Hz)
AMPLITUDE (dB)
Figure 5. Normal Mode FFT, 1 kHz, −0.5 dB Input Tone, 256× Decimation
04975-007
0 4000 8000 12000 16000 20000
–200
0
–25
–50
–75
–100
–125
–150
–175
24000
FREQUENCY (Hz)
AMPLITUDE (dB)
Figure 6. Normal Mode FFT, 1 kHz, −6 dB Input Tone, 256× Decimation
0
4
9
7
5
-
0
0
8
0 4000 8000 12000 16000 20000
–200
0
–25
–50
–75
–100
–125
–150
–175
24000
FREQUENCY (Hz)
AMPLITUDE (dB)
Figure 7. Normal Mode FFT, 1 kHz, −60 dB Input Tone, 256× Decimation
04975-009
0 4000 8000 12000 16000 20000
–200
0
–25
–50
–75
–100
–125
–150
–175
24000
FREQUENCY (Hz)
AMPLITUDE (dB)
Figure 8. Low Power FFT, 1 kHz, −0.5 dB Input Tone, 256× Decimation
04975-010
0 4000 8000 12000 16000 20000
–200
0
–25
–50
–75
–100
–125
–150
–175
24000
FREQUENCY (Hz)
AMPLITUDE (dB)
Figure 9. Low Power FFT, 1 kHz, −6 dB Input Tone, 256× Decimation
04975-011
0 4000 8000 12000 16000 20000
–200
0
–25
–50
–75
–100
–125
–150
–175
24000
FREQUENCY (Hz)
AMPLITUDE (dB)
Figure 10. Low Power FFT, 1 kHz, −60 dB Input Tone, 256× Decimation