AD7682 Analog Devices, AD7682 Datasheet - Page 12

• Manufacturer Part Number: AD7682
• Manufacturer: Analog Devices

Specifications of AD7682

• Resolution (bits): 16bit
• # Chan: 4
• Sample Rate: 250kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni,SE-Bip,SE-Uni
• Ain Range: Bip (Vref) x 0.5,Uni (Vref)
• Adc Architecture: SAR
• Pkg Type: CSP

AD7682/AD7689
TYPICAL PERFORMANCE CHARACTERISTICS
VDD = 2.5 V to 5.5 V, V
–0.5
–1.0
–1.5
1.5
1.0
0.5
–100
–120
–140
–160
–180
200k
180k
160k
140k
120k
100k
–20
–40
–60
–80
0
80k
60k
40k
20k
Figure 6. Integral Nonlinearity vs. Code, V
0
0
0
INL MAX = +0.34 LSB
INL MIN = –0.44 LSB
0
Figure 7. Histogram of a DC Input at Code Center
7FFA
0
Figure 8. 20 kHz FFT, V
7FFB 7FFC 7FFD 7FFE 7FFF 8000
16,384
0
25
487
REF
135,326
= 2.5 V to 5 V, VIO = 2.3 V to VDD, unless otherwise noted.
FREQUENCY (kHz)
50
CODE IN HEX
CODES
32,768
124,689
V
f
f
SNR = 92.9dB
SINAD = 92.4dB
THD = –102dB
SFDR = 103dB
SECOND HARMONIC = –111dB
THIRD HARMONIC = –104dB
S
IN
REF
= 250kSPS
= 19.9kHz
REF
= VDD = 5V
= VDD = 5 V
75
619
49,152
REF
σ = 0.50
V
0
= VDD = 5 V
REF
100
= VDD = 5V
8001
0
65,536
8002
0
125
Rev. C | Page 12 of 32
–0.5
–1.0
–100
–120
–140
–160
–180
1.5
1.0
0.5
160k
140k
120k
100k
–20
–40
–60
–80
Figure 9. Differential Nonlinearity vs. Code, V
80k
60k
40k
20k
0
0
0
0
DNL MAX = +0.20 LSB
DNL MIN = –0.22 LSB
0
Figure 10. Histogram of a DC Input at Code Center
7FFB 7FFC 7FFD 7FFE 7FFF 8000
1
Figure 11. 20 kHz FFT, V
78
16,384
25
6649
63,257
FREQUENCY (kHz)
CODE IN HEX
CODES
32,768
135,207
50
V
f
f
SNR = 88.0dB
SINAD = 87.0dB
THD = –89dB
SFDR = 89dB
SECOND HARMONIC = –105dB
THIRD HARMONIC = –90dB
s
IN
REF
= 200kSPS
REF
= 19.9kHz
51,778
= VDD = 2.5 V
= VDD = 2.5V
49,152
4090
8001
σ = 0.78
V
REF
REF
75
Data Sheet
= VDD = 5 V
= VDD = 2.5V
8002
60
8003
65,536
1
100