EVAL-AD7691CB 데이터 시트보기 (PDF) - Analog Devices
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EVAL-AD7691CB Datasheet PDF : 28 Pages
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AD7691
TYPICAL PERFORMANCE CHARACTERISTICS
1.5
POSITIVE INL = 0.39LSB
NEGATIVE INL = –0.73LSB
1.0
0.5
0
–0.5
–1.0
–1.5
0
65536
131072
196608
CODE
Figure 7. Integral Nonlinearity vs. Code 2.5 V
262144
1.0
POSITIVE DNL = 0.37LSB
NEGATIVE DNL = –0.33LSB
0.5
0
–0.5
–1.0
0
65536
131072
196608
CODE
Figure 10. Differential Nonlinearity vs. Code, 5 V
262144
80k
VDD = REF = 5V
69769
σ = 0.76LSB
70k
60k
50k
40k
30k
28527
27770
20k
10k
2904
0 0 26
0
2062 14 0 0
25 26 27 28 29 2A 2B 2C 2D 2E 2F
CODE IN HEX
Figure 8. Histogram of a DC Input at the Code Center, 5 V
45k
VDD = REF = 2.5V
40k
38068
σ = 1.42LSB
35k
30k
28179
24411
25k
20k
17460
15k
14362
10k
5k
2997
4055
0 12 29 501
0
910 78 9 0
23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31
CODE IN HEX
Figure 11. Histogram of a DC Input at the Code Center, 2.5 V
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0
32768 POINT FFT
VDD = REF = 5V
fS = 250kSPS
fIN = 2kHz
SNR = 101.4dB
THD = –120.1dB
2ND HARMONIC = –140.7dB
3RD HARMONIC = –120.3dB
20
40
60
80
100
120
FREQUENCY (kHz)
Figure 9. 2 kHz FFT Plot, 5 V
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0
Rev. 0 | Page 10 of 28
32768 POINT FFT
VDD = REF = 2.5V
fS = 180kSPS
fIN = 2kHz
SNR = 96.4dB
THD = –120.3dB
2ND HARMONIC = –132.5dB
3RD HARMONIC = –121.2dB
10 20 30 40 50 60 70 80 90
FREQUENCY (kHz)
Figure 12. 2 kHz FFT Plot, 2.5 V
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