AD7723 Analog Devices, AD7723 Datasheet - Page 15

• Manufacturer Part Number: AD7723
• Description: 16-Bit, 1.2 MSPS, CMOS Sigma-Delta ADC
• Manufacturer: Analog Devices

Specifications of AD7723

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: 19.2MSPS
• Interface: Par,Ser
• Analog Input Type: Diff-Bip,Diff-Uni
• Ain Range: 4 V p-p,Uni 4.0V
• Adc Architecture: Sigma-Delta
• Pkg Type: QFP

TYPICAL PERFORMANCE CHARACTERISTICS
AV
Figure 12. SNR, THD, and SFDR vs. Analog Input Level Relative to Full Scale
Figure 13. SNR, THD, and SFDR vs. Analog Input Level Relative to Full Scale
Figure 14. SNR and THD vs. Temperature (Output Data Rate = 1.2 MHz)
DD
102
100
= DV
110
100
110
100
98
96
94
92
90
88
86
84
90
80
70
60
50
40
90
80
70
60
50
40
–50
–50
–50
SIGNAL FREQUENCY = 98kHz
MEASUREMENT BANDWIDTH = 460kHz
SIGNAL FREQUENCY = 98kHz
MEASUREMENT BANDWIDTH = 300kHz
SIGNAL FREQUENCY = 98kHz
MEASUREMENT BANDWIDTH = 460kHz
DD
= 5 V; T
–25
–40
–40
(Output Data Rate = 1.2 MHz)
(Output Data Rate = 600 kHz)
A
ANALOG INPUT LEVEL (dB)
ANALOG INPUT LEVEL (dB)
= 25°C; CLKIN = 19.2 MHz; external 2.5 V reference, unless otherwise noted.
THD
0
THD
TEMPERATURE (°C)
SFDR
–30
–30
SFDR
25
SNR
2ND
THD
3RD
–20
–20
SNR
SNR
50
–10
–10
75
100
0
0
Rev. C | Page 15 of 32
Figure 16. SNR, THD, and SFDR vs. Sampling Frequency (Decimate by 16)
Figure 17. SNR, THD, and SFDR vs. Sampling Frequency (Decimate by 32)
Figure 15. SNR and THD vs. Temperature (Output Data Rate = 600 kHz)
115
110
105
100
106
104
102
100
106
104
102
100
95
90
98
96
94
92
90
88
98
96
94
92
90
88
86
84
100
–50
50
SIGNAL FREQUENCY = 98kHz
MEASUREMENT BANDWIDTH = 300kHz
INPUT SIGNAL = 10kHz
MEASUREMENT BANDWIDTH = 0.5 × OWR
INPUT SIGNAL = 10kHz
MEASUREMENT BANDWIDTH = 0.383 × OWR
150
–25
500
300
OUTPUT WORD RATE (kHz)
OUTPUT WORD RATE (kHz)
0
TEMPERATURE (°C)
SFDR
1000
450
25
THD
SNR
THD
2ND
3RD
600
1500
50
SFDR
SNR
THD
750
SNR
75
2150
AD7723
100
900