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AD7682 Datasheet(PDF) 10 Page - Analog Devices

Part # AD7682
Description  14-Bit, 8-Channel, 250 kSPS PulSAR ADC
PDF  28 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7682 Datasheet(HTML) 10 Page - Analog Devices

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AD7949
Rev. A | Page 10 of 28
TYPICAL PERFORMANCE CHARACTERISTICS
VDD = 2.5 V to 5.5 V, VREF = 2.5 V to 5 V, VIO = 2.3 V to VDD
1.0
0.5
0
–0.5
–1.0
0
4,096
8,192
12,288
16,384
CODES
Figure 5. Integral Nonlinearity vs. Code, VREF = VDD = 5 V
300k
250k
200k
150k
100k
50k
0
1FFC
CODE IN HEX
1FFD
1FFE
1FFF
2000
2001
2002
2003
00
0
1
0
00
0
VREF = VDD = 5V
261,120
Figure 6. Histogram of a DC Input at Code Center
0
–20
–40
–60
–80
–100
–120
–140
–160
050
25
75
100
125
FREQUENCY (kHz)
VREF = VDD = 5V
fS= 250kSPS
fIN = 19.9kHz
SNR = 85.3dB
SINAD = 85.2dB
THD = –100dB
SFDR = 103dB
SECOND HARMONIC = –110dB
THIRD HARMONIC = –103dB
Figure 7. 20 kHz FFT, VREF = VDD = 5 V
CODES
0
4,096
8,192
12,288
16,384
1.0
0.5
0
–0.5
–1.0
Figure 8. Differential Nonlinearity vs. Code, VREF = VDD = 5 V
CODE IN HEX
259,473
300k
250k
200k
150k
100k
50k
0
1FFC 1FFD 1FFE 1FFF 2000
2001
2002 2003
2004
00
0
955
693
00
0
VREF = VDD = 2.5V
Figure 9. Histogram of a DC Input at Code Center
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
050
25
75
100
FREQUENCY (kHz)
VREF = VDD = 2.5V
fs= 200kSPS
fIN = 19.9kHz
SNR = 84.2dB
SINAD = 82.4dB
THD = –84dB
SFDR = 85dB
SECOND HARMONIC = –100dB
THIRD HARMONIC = –85dB
Figure 10. 20 kHz FFT, VREF = VDD = 2.5 V



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