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AD7687BRMZ Datasheet(PDF) 10 Page - Analog Devices

Part # AD7687BRMZ
Description  16-Bit, 1.5 LSB INL, 250 kSPS PulSAR??Differential ADC in MSOP/QFN
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7687BRMZ Datasheet(HTML) 10 Page - Analog Devices

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AD7687
Data Sheet
Rev. B | Page 10 of 28
TYPICAL PERFORMANCE CHARACTERISTICS
CODE
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
0
16384
32768
49152
65535
POSITIVE INL = +0.32LSB
NEGATIVE INL = –0.41LSB
Figure 7. Integral Nonlinearity vs. Code
300000
250000
150000
200000
100000
50000
0
CODE IN HEX
45
46
47
41
42
43
44
0
0
1049
0
0
258680
1391
VDD = REF = 5V
Figure 8. Histogram of a DC Input at the Code Center
FREQUENCY (kHz)
0
–20
–40
–60
–80
–100
–120
–160
–140
–180
0
20
40
60
80
100
120
8192 POINT FFT
VDD = REF = 5V
FS = 250KSPS
FIN = 2.1kHz
SNR = 95.5dB
THD = –118.3dB
2nd HARM = –130dB
3rd HARM = –122.7dB
Figure 9. FFT Plot
CODE
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
0
16384
32768
49152
65535
POSITIVE DNL = +0.27LSB
NEGATIVE DNL = –0.24LSB
Figure 10. Differential Nonlinearity vs. Code
250000
150000
200000
100000
50000
0
CODE IN HEX
49
4A
4C
44
46
47
48
0
45
060
30721
18
4B
00
200403
29918
VDD = REF = 2.5V
Figure 11. Histogram of a DC Input at the Code Center
FREQUENCY (kHz)
0
–20
–40
–60
–80
–100
–120
–160
–140
–180
0
20
40
60
80
100
120
32768 POINT FFT
VDD = REF = 2.5V
FS = 250KSPS
FIN = 2kHz
SNR = 92.8dB
THD = –115.9dB
2nd HARM = –124dB
3rd HARM = –119dB
Figure 12. FFT Plot


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