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AD7942BCPZRL1 Arkusz danych(PDF) 9 Page - Analog Devices

Numer części AD7942BCPZRL1
Szczegółowy opis  14-Bit, 250 kSPS PulSAR, Pseudo Differential ADC in MSOP/QFN
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Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
Logo AD - Analog Devices

AD7942BCPZRL1 Arkusz danych(HTML) 9 Page - Analog Devices

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AD7942
Rev. B | Page 9 of
24
TYPICAL PERFORMANCE CHARACTERISTICS
POSITIVE INL = +0.22LSB
NEGATIVE INL = –0.34LSB
1.00
0.75
0.50
0.25
0
–0.50
–0.75
–1.00
–0.25
0
4096
8192
12,288
16,384
CODE
Figure 5. Integral Nonlinearity vs. Code
129,941
150,000
100,000
50,000
0
0
0
915
216
0
0
1FFD
1FFE
1FFF
2000
2001
2002
2003
CODE IN HEX
VDD = VREF = 2.5V
Figure 6. Histogram of a DC Input at the Code Center
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0
25
50
75
100
125
FREQUENCY (kHz)
16,384 POINT FFT
VDD = VREF = 5V
fS = 250kSPS
fIN = 20.43kHz
SNR = 85.1dB
THD = –105dB
SFDR = –105.9dB
Figure 7. FFT Plot
POSITIVE DNL = +0.24LSB
NEGATIVE DNL = –0.12LSB
1.00
0.75
0.50
0.25
0
–0.50
–0.75
–1.00
–0.25
0
4096
8192
12,288
16,384
CODE
Figure 8. Differential Nonlinearity vs. Code
150,000
100,000
50,000
0
00
0
0
0
0
1FFD
1FFE
1FFF
2000
2001
2002
2003
CODE IN HEX
VDD = VREF = 5V
131,072
Figure 9. Histogram of a DC Input at the Code Center
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0
25
50
75
100
125
FREQUENCY (kHz)
16,384 POINT FFT
VDD = VREF = 2.5V
fS = 250kSPS
fIN = 20.43kHz
SNR = 84.2dB
THD = –101.7dB
SFDR = –104.3dB
Figure 10. FFT Plot


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