Datasheet

AD7767
Rev. C | Page 12 of 24
–110
–130
–128
–126
–124
–122
–120
–118
–116
–114
–112
01900k800k700k600k500k400k300k200k100k
THD (dB)
MCLK FREQUENCY (Hz)
06859-113
M
AD7767
AD7767-1
AD7767-2
Figure 19. AD7767/AD7767-1/AD7767-2 THD vs. MCLK Frequency
06859-114
115
107
108
109
110
111
112
113
114
01M900k800k700k600k500k400k300k200k100k
SNR (dB)
MCLK FREQUENCY (Hz)
AD7767
AD7767-1
AD7767-2
Figure 20. AD7767/AD7767-1/AD7767-2 SNR vs. MCLK Frequency
150
140
130
120
110
100
0650k40k30k20k10k
PSRR (dB)
f
NOISE
(Hz)
AV
DD
DV
DD
V
DRIVE
0k
06859-117
Figure 21. AD7767 Power Supply Sensitivity vs. Supply Ripple Frequency
(f
NOISE
) with Decoupling Capacitors
120
115
110
105
100
95
90
0650k40k30k20k10k
CMRR (dB)
f
NOISE
(Hz)
0k
OPEN INPUTS
FULL-SCALE 921Hz
DYNAMIC RANGE
06859-116
Figure 22. AD7767 CMRR vs. Common-Mode Ripple Frequency (f
NOISE
)
200
160
120
80
40
180
140
100
60
20
0
OCCURRENCE
CODES
8388493 8388497 8388501 8388505 8388509 8388513 8388517 8388521 8388525 8388529 8388533 8388537 8388541 8388545 8388549 8388553 8388557 8388561 8388565 8388569 8388573 8388577 8388581 8388585 8388589 8388593 8388597 8388601 8388605 8388609 8388613 8388617 8388621 8388625 8388629 8388633 8388637
MAX = 8388637
MIN = 8388493
SPREAD = 145
06859-118
Figure 23. AD7767 24-Bit Histogram
250
200
150
100
50
0
OCCURRENCE
CODES
MAX = 8388608
MIN = 8388507
SPREAD = 102 CODES
8388508 8388512 8388516 8388520 8388524 8388528 8388532 8388536 8388540 8388544 8388548 8388552 8388556 8388560 8388564 8388568 8388572 8388576 8388580 8388584 8388588 8388592 8388596 8388600 8388604 8388608
06859-119
Figure 24. AD7767-1 24-Bit Histogram