参数资料
型号: EVAL-CN0194-SDPZ
厂商: Analog Devices Inc
文件页数: 2/28页
文件大小: 0K
描述: BOARD CFTL AD7685
设计资源: CN-0194 CFTL Eval/Design Support
标准包装: 1
系列: Circuits from the Lab™
主要目的: 参考设计,隔离式数据采集系统
嵌入式:
已用 IC / 零件: AD7685,AD8615,ADuM1402
已供物品:
AD7685
Rev. C | Page 10 of 28
TYPICAL PERFORMANCE CHARACTERISTICS
02
96
8-
0
47
CODE
65536
0
16384
32768
49152
IN
L
(
L
S
B
)
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
POSITIVE INL = +0.33LSB
NEGATIVE INL = –0.50LSB
Figure 7. Integral Nonlinearity vs. Code
02
96
8-
0
06
CODE IN HEX
80EA 80EB 80EC 80ED
80E5 80E6 80E7 80E8 80E9
CO
UNT
S
250000
200000
150000
100000
50000
0
00
12
00
204292
27755
29041
20
VDD = REF = 5V
Figure 8. Histogram of a DC Input at the Code Center
02
96
8-
0
07
FREQUENCY (kHz)
120
0
20406080
100
AM
P
L
IT
UD
E
(
d
B
O
F
UL
L
S
CAL
E
)
0
–20
–40
–60
–80
–100
–120
–160
–140
–180
8192 POINT FFT
VDD = REF = 5V
fS = 250kSPS
fIN = 20.45kHz
SNR = 93.3dB
THD = –111.6dB
SFDR = –113.7dB
SECOND HARMONIC = –113.7dB
THIRD HARMONIC = –117.6dB
Figure 9. FFT Plot
02
96
8-
0
08
CODE
65536
0
16384
32768
49152
DN
L
(
L
S
B
)
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
POSITIVE DNL = +0.21LSB
NEGATIVE DNL = –0.30LSB
Figure 10. Differential Nonlinearity vs. Code
02
96
8-
0
09
CODE IN HEX
8058
804E 804F 8050 8051 8052 8053 8054 8055 8056 8057
CO
UNT
S
140000
120000
100000
80000
60000
40000
20000
0
02
213
6956
179
0
60966
125055
8667
59082
VDD = REF = 2.5V
Figure 11. Histogram of a DC Input at the Code Center
02
96
8-
0
10
FREQUENCY (kHz)
120
0
204060
80
100
AM
P
L
IT
UD
E
(
d
B
O
F
UL
L
S
CAL
E
)
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
16384 POINT FFT
VDD = REF = 2.5V
fS = 250kSPS
fIN = 20.45kHz
SNR = 88.8dB
THD = –103.5dB
SFDR = –104.5dB
SECOND HARMONIC = –112.4dB
THIRD HARMONIC = –105.4dB
Figure 12. FFT Plot
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