Datasheet

AD7762 Data Sheet
Rev. A | Page 10 of 28
TYPICAL PERFORMANCE CHARACTERISTICS
AV
DD1
= DV
DD
= V
DRIVE
= 2.5 V, AV
DD2
= AV
DD3
= AV
DD4
= 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.
0 4000
8000 12000
16000 20000
–
200
0
–
25
–
50
–75
–100
–
125
–
150
–175
24000
FREQUENCY (Hz)
AMPLITUDE (dB)
05477-006
Figure 5. Normal Mode FFT, 1 kHz, −0.5 dB Input Tone, 256× Decimation
0 4000 8000 12000 16000 20000
–200
0
–25
–50
–75
–100
–125
–150
–175
24000
FREQUENCY (Hz)
AMPLITUDE (dB)
05477-007
Figure 6. Normal Mode FFT, 1 kHz, −6 dB Input Tone, 256× Decimation
0 4000 8000 12000 16000 20000
–200
0
–25
–50
–75
–100
–125
–150
–175
24000
FREQUENCY (Hz)
AMPLITUDE (dB)
05477-008
Figure 7. Normal Mode FFT, 1 kHz, −60 dB Input Tone, 256× Decimation
0 4000 8000 12000 16000 20000
–200
0
–25
–50
–75
–100
–125
–150
–175
24000
FREQUENCY (Hz)
AMPLITUDE (dB)
05477-009
Figure 8. Low Power FFT, 1 kHz, −0.5 dB Input Tone, 256× Decimation
0 4000 8000 12000 16000 20000
–200
0
–25
–50
–
75
–100
–125
–150
–175
24000
FREQUENCY (Hz)
AMPLITUDE (dB)
05477-010
Figure 9. Low Power FFT, 1 kHz, −6 dB Input Tone, 256× Decimation
0 4000 8000 12000 16000 20000
–200
0
– 25
–50
–75
–100
–125
–
150
–
175
24000
FREQUENCY (Hz)
AMPLITUDE (dB)
05477-011
Figure 10. Low Power FFT, 1 kHz, −60 dB Input Tone, 256× Decimation