参数资料
型号: AD7608BSTZ-RL
厂商: Analog Devices Inc
文件页数: 8/32页
文件大小: 0K
描述: IC DAS W/ADC 18BIT 8CH 64LQFP
标准包装: 1,500
类型: 数据采集系统(DAS),ADC
分辨率(位): 18 b
采样率(每秒): 200k
数据接口: DSP,MICROWIRE?,并联,QSPI?,串行,SPI?
电压电源: 模拟和数字
电源电压: 2.3 V ~ 5.25 V,4.75 V ~ 5.25 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 64-LQFP
供应商设备封装: 64-LQFP(10x10)
包装: 带卷 (TR)
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°C
INTERNAL REFERENCE
±5V RANGE
OS × 64
OS × 32
OS × 16
OS × 8
OS × 4
OS × 2
NO OS
08938-
120
Figure 20. SNR vs. Input Frequency for Different Oversampling Rates, ±5 V Range
–40
–50
–60
–70
–80
–90
–100
–110
1k
100k
10k
–120
T
HD
(
d
B)
INPUT FREQUENCY (Hz)
±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, ±10 V Range
1k
100k
10k
T
HD
(
d
B)
INPUT FREQUENCY (Hz)
±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
–40
–50
–60
–70
–80
–90
–100
–110
–120
08938-
122
Figure 22. THD vs. Input Frequency for Various Source Impedances, ±5 V Range
4.0
–40
–25
–10
5
20
35
50
65
80
–4.0
–3.2
–2.4
–1.6
–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 (°C)
200kSPS
AVCC, VDRIVE = 5V
EXTERNAL REFERENCE
±5V RANGE
±10V RANGE
08938-
023
Figure 23. Bipolar Zero Code Error vs. Temperature
16
12
8
4
0
–4
–8
–12
–40
–25
–10
5
20
35
50
65
80
–16
BI
P
O
L
AR
Z
E
RO
CO
DE
E
RRO
R
M
AT
CHI
NG
(
L
S
B)
TEMPERATURE (°C)
200kSPS
AVCC, VDRIVE = 5V
EXTERNAL REFERENCE
±5V RANGE
±10V RANGE
08938-
024
Figure 24. Bipolar Zero Code Error Matching Between Channels
–50
–60
–70
–80
–90
–100
–110
–120
–130
0
160
140
120
100
80
60
40
20
–140
CHANNE
L
-T
O
-CHANNE
L
I
S
O
L
AT
IO
N
(
d
B)
NOISE FREQUENCY (kHz)
±10V RANGE
±5V RANGE
AVCC, VDRIVE = 5V
INTERNAL REFERENCE
AD7608 RECOMMENDED DECOUPLING USED
fSAMPLE = 150kSPS
TA = 25°C
INTERFERER ON ALL UNSELECTED CHANNELS
08938-
025
Figure 25. Channel-to-Channel Isolation
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