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參數(shù)資料
| 型號： | AD7716BS |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | LC2MOS 22-Bit Data Acquisition System |
| 中文描述： | 4-CH 22-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PQFP44 |
| 封裝： | PLASTIC, QFP-44 |
| 文件頁數(shù)： | 16/16頁 |
| 文件大?。?/td> | 430K |
| 代理商： | AD7716BS |
REV. A
AD7716
–16–
Multibandwidth System
Some applications may require multiple AD7716’s with differ-
ent bandwidths programmed to each device. The best way to
accomplish this is shown in Figure 12. The master mode inter-
face is used for this example but the slave mode may also be
used. The example shows an 8-channel system with Device #0
in the system programmed for a 292 Hz cutoff frequency and
Device #1 programmed for a 146 Hz cutoff frequency.
CASCIN
DRDY
RESET
CASCOUT
MODE
#0
(292 Hz)
CASCIN
DRDY
RESET
MODE
#1
(146 Hz)
RESET
TFS
RFS
SCLK
SDATA
Figure 12. Multibandwidth System
The resultant output signals are also shown. Since Device #0
has a higher bandwidth it will also have a higher update rate.
The receiving processor will be getting samples from this device
at twice the rate of Device #1.
#0
#0 #1
#0
#0 #1
#0
#0 #1
RESET
DRDY #0
DRDY #1
SDATA
Figure 13. Output Signals for Figure 12
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
44-Lead PLCC
(P-44A)
0.032 (0.81)
0.026 (0.66)
0.021 (0.53)
0.013 (0.33)
0.056 (1.42)
0.042 (1.07)
0.025 (0.63)
0.015 (0.38)
0.180 (4.57)
0.165 (4.19)
0.63 (16.00)
0.59 (14.99)
0.110 (2.79)
0.085 (2.16)
0.040 (1.01)
0.025 (0.64)
0.050
(1.27)
BSC
0.656 (16.66)
0.695 (17.65)
0.048 (1.21)
0.042 (1.07)
0.048 (1.21)
0.042 (1.07)
40
6
TOP VIEW
39
29
18
17
PIN 1
IDENTIFIER
7
28
0.020
(0.50)
R
44-Lead Plastic Quad Flatpack
(S-44)
0.083 (2.11)
0.077 (1.96)
0.016 (0.41)
0.012 (0.30)
0.033 (0.84)
0.029 (0.74)
1
44
34
33
23
22
12
11
TOP VIEW
PIN 1
0.398 (10.11)
0.390 (9.91)
0.557 (14.148)
0.537 (13.640)
0.096 (2.44)
MAX
0.037 (0.94)
0.025 (0.64)
0.398 (10.11)
0.390 (9.91)
0.040 (1.02)
0.032 (0.81)
0.040 (1.02)
0.032 (0.81)
8
°
0.8
°
P
C
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