参数资料
型号: AD7193BCPZ
厂商: Analog Devices Inc
文件页数: 38/57页
文件大小: 0K
描述: IC ADC 24BIT SPI 4.8KHZ 32LFCSP
标准包装: 1
位数: 24
采样率(每秒): 4.8k
数据接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
转换器数目: 1
电压电源: 模拟和数字
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 32-WFQFN 裸露焊盘,CSP
供应商设备封装: 32-LFCSP-WQ(5x5)
包装: 托盘
输入数目和类型: 4 个差分,单极;4 个差分,双极;8 个伪差分,单极;8 个伪差分,双极
AD7193
Data Sheet
Rev. D | Page 42 of 56
When the analog input is constant or a channel change occurs,
valid conversions are available at a constant output data rate.
When conversions are being performed on a single channel and
a step change occurs on the analog input, the ADC continues to
output fully settled conversions if the step change is synchronized
with the conversion process. If the step change is asynchronous,
one conversion is output from the ADC, which is not completely
settled (see Figure 31).
ANALOG
INPUT
ADC
OUTPUT
FULLY
SETTLED
1/
fADC
08367-
027
Figure 31. Sinc4 Zero Latency Operation
Table 29 shows examples of output data rate and the corresponding
FS values.
Table 29. Examples of Output Data Rates and the
Corresponding Settling Time (Zero Latency)
FS[9:0]
Output Data Rate (Hz)
Settling Time (ms)
480
2.5
400
96
12.5
80
15
66.6
Sinc4 50 Hz/60 Hz Rejection
Figure 32 shows the frequency response of the sinc4 filter when
FS[9:0] is set to 96 and the master clock is 4.92 MHz. With zero
latency disabled, the output data rate is equal to 50 Hz. With
zero latency enabled, the output data rate is 12.5 Hz. The sinc4
filter provides 50 Hz (±1 Hz) rejection in excess of 120 dB
minimum, assuming a stable master clock.
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
25
50
75
100
125
150
FREQUENCY (Hz)
FI
L
T
E
R
G
AI
N
(
d
B)
08367-
028
Figure 32. Sinc4 Filter Response (FS[9:0] = 96)
Figure 33 shows the frequency response when FS[9:0] is
programmed to 80 and the master clock is equal to 4.92 MHz.
The output data rate is 60 Hz when zero latency is disabled and
15 Hz when zero latency is enabled. The sinc4 filter provides
60 Hz (±1 Hz) rejection of 120 dB minimum, assuming a stable
master clock.
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
30
60
90
120
150
FREQUENCY (Hz)
FI
L
T
E
R
G
AI
N
(
d
B)
08367-
029
Figure 33. Sinc4 Filter Response (FS[9:0] = 80)
Simultaneous 50 Hz and 60 Hz rejection is obtained when
FS[9:0] is programmed to 480 and the master clock equals
4.92 MHz. The output data rate is 10 Hz when zero latency is
disabled and 2.5 Hz when zero latency is enabled. The sinc4
filter provides 50 Hz (±1 Hz) and 60 Hz (±1 Hz) rejection of
120 dB minimum, assuming a stable master clock.
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
30
60
90
120
150
FREQUENCY (Hz)
FI
L
T
E
R
G
AI
N
(
d
B)
08367-
030
Figure 34. Sinc4 Filter Response (FS[9:0] = 480)
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