AD7766 Analog Devices, AD7766 Datasheet - Page 12

• Manufacturer Part Number: AD7766
• Description: 24-Bit, 8.5 mW, 109 dB, 128/64/32 kSPS ADCs
• Manufacturer: Analog Devices

Specifications of AD7766

• Resolution (bits): 24bit
• # Chan: 1
• Sample Rate: 128kSPS
• Interface: Ser
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p
• Adc Architecture: SAR
• Pkg Type: SOP

AD7766
Figure 21. AD7766 Power Supply Sensitivity vs. Supply Ripple Frequency
Figure 19. AD7766/AD7766-1/AD7766-2 THD vs. MCLK Frequency
Figure 20. AD7766/AD7766-1/AD7766-2 SNR vs. MCLK Frequency
–104
–108
–112
–116
–120
115
114
113
112
111
110
109
108
107
150
140
130
120
110
100
0
0
0
100k
100k
10k
200k
200k
(f
NOISE
DV
300k
300k
DD
) with Decoupling Capacitors
MCLK FREQUENCY (Hz)
MCLK FREQUENCY (Hz)
20k
AD7766-1
400k
400k
AD7766-2
AD7766-1
f
NOISE
AD7766
500k
500k
30k
AD7766
(Hz)
AV
600k
600k
DD
AD7766-2
40k
700k
700k
V
DRIVE
800k
800k
50k
900k
900k
1
1M
6
M
0k
Rev. C | Page 12 of 24
Figure 22. AD7766 CMRR vs. Common-Mode Ripple Frequency (f
120
115
110
105
100
200
180
160
140
120
100
250
200
150
100
95
90
80
60
40
20
50
0
0
0
Figure 24. AD7766-1 24-Bit Histogram
10k
Figure 23. AD7766 24-Bit Histogram
20k
FULL-SCALE 921Hz
DYNAMIC RANGE
OPEN INPUTS
f
NOISE
CODES
CODES
30k
(Hz)
MAX = 8,388,608
MIN = 8,388,507
SPREAD = 102 CODES
40k
MAX = 8,388,637
MIN = 8,388,493
SPREAD = 145
50k
6
0k
NOISE
)