AV
鍙冩暩(sh霉)璩囨枡
鍨嬭櫉锛� EVAL-AD7608EDZ
寤犲晢锛� Analog Devices Inc
鏂囦欢闋佹暩(sh霉)锛� 8/32闋�
鏂囦欢澶�?銆�?/td> 0K
鎻忚堪锛� BOARD EVAL FOR AD7608
妯欐簴鍖呰锛� 1
ADC 鐨勬暩(sh霉)閲忥細 8
浣嶆暩(sh霉)锛� 18
閲囨ǎ鐜囷紙姣忕锛夛細 200k
鏁�(sh霉)鎿�(j霉)鎺ュ彛锛� DSP锛孧ICROWIRE?锛屽苟鑱�(li谩n)锛孮SPI?锛屼覆琛�锛孲PI?
杓稿叆鑼冨湇锛� ±10 V
鍦ㄤ互涓嬫浠朵笅鐨勯浕婧愶紙妯欐簴锛夛細 100mW @ 200kSPS
宸ヤ綔婧害锛� -40°C ~ 85°C
宸茬敤 IC / 闆朵欢锛� AD7608
宸蹭緵鐗╁搧锛� 鏉�
AD7608
Data Sheet
Rev. A | Page 16 of 32
80
85
90
95
100
105
10
100
1k
10k
100k
S
NR
(
d
B)
INPUT FREQUENCY (Hz)
AVCC, VDRIVE = 5V
fSAMPLE CHANGES WITH OS RATE
TA = 25掳C
INTERNAL REFERENCE
卤5V RANGE
OS 脳 64
OS 脳 32
OS 脳 16
OS 脳 8
OS 脳 4
OS 脳 2
NO OS
08938-
120
Figure 20. SNR vs. Input Frequency for Different Oversampling Rates, 卤5 V Range
鈥�40
鈥�50
鈥�60
鈥�70
鈥�80
鈥�90
鈥�100
鈥�110
1k
100k
10k
鈥�120
T
HD
(
d
B)
INPUT FREQUENCY (Hz)
卤10V RANGE
AVCC, VDRIVE = 5V
fSAMPLE = 200kSPS
RSOURCE MATCHED ON Vx AND VxGND INPUTS
105k
48.7k
23.7k
10k
5k
1.2k
100
51
0
08938-
021
Figure 21. THD vs. Input Frequency for Various Source Impedances, 卤10 V Range
1k
100k
10k
T
HD
(
d
B)
INPUT FREQUENCY (Hz)
卤5V RANGE
AVCC, VDRIVE = 5V
fSAMPLE = 200kSPS
RSOURCE MATCHED ON Vx AND VxGND INPUTS
105k
48.7k
23.7k
10k
5k
1.2k
100
51
0
鈥�40
鈥�50
鈥�60
鈥�70
鈥�80
鈥�90
鈥�100
鈥�110
鈥�120
08938-
122
Figure 22. THD vs. Input Frequency for Various Source Impedances, 卤5 V Range
4.0
鈥�40
鈥�25
鈥�10
5
20
35
50
65
80
鈥�4.0
鈥�3.2
鈥�2.4
鈥�1.6
鈥�0.8
0
0.8
1.6
2.4
3.2
BI
P
O
L
AR
Z
E
RO
CO
DE
E
RRO
R
(
L
S
B)
TEMPERATURE (掳C)
200kSPS
AVCC, VDRIVE = 5V
EXTERNAL REFERENCE
卤5V RANGE
卤10V RANGE
08938-
023
Figure 23. Bipolar Zero Code Error vs. Temperature
16
12
8
4
0
鈥�4
鈥�8
鈥�12
鈥�40
鈥�25
鈥�10
5
20
35
50
65
80
鈥�16
BI
P
O
L
AR
Z
E
RO
CO
DE
E
RRO
R
M
AT
CHI
NG
(
L
S
B)
TEMPERATURE (掳C)
200kSPS
AVCC, VDRIVE = 5V
EXTERNAL REFERENCE
卤5V RANGE
卤10V RANGE
08938-
024
Figure 24. Bipolar Zero Code Error Matching Between Channels
鈥�50
鈥�60
鈥�70
鈥�80
鈥�90
鈥�100
鈥�110
鈥�120
鈥�130
0
160
140
120
100
80
60
40
20
鈥�140
CHANNE
L
-T
O
-CHANNE
L
I
S
O
L
AT
IO
N
(
d
B)
NOISE FREQUENCY (kHz)
卤10V RANGE
卤5V RANGE
AVCC, VDRIVE = 5V
INTERNAL REFERENCE
AD7608 RECOMMENDED DECOUPLING USED
fSAMPLE = 150kSPS
TA = 25掳C
INTERFERER ON ALL UNSELECTED CHANNELS
08938-
025
Figure 25. Channel-to-Channel Isolation
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