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参数资料
| 型号： | SPT8100 |
| 厂商： | Fairchild Semiconductor Corporation |
| 英文描述： | 16-BIT, 5 MSPS CMOS A/D CONVERTER |
| 中文描述： | 16位，5 MSPS的的CMOS A / D转换 |
| 文件页数： | 6/10页 |
| 文件大小： | 91K |
| 代理商： | SPT8100 |
6
1/9/02
SPT8100
Figure 2a
–
Typical Interface Circuit
Mini-Circuit
T1-6T
Transformer
+A5V
+A3.3/5V
V
IN
+
V
IN
–
V
CM
A
IN
16
D0
–
15
Logic
Interfacing
Circuit
+D3.3/5V
+
0.1
0.1
SPT8100
FB1
BIAS
C
BIAS
R
1.0
1.43K
R
T
(50)
RDY
OVR
0.1
Gain Control
Output
Enable
(active Hi)
Clock
Input
V
RT
V
RB
+
10 0.1 1nF
4.7
10
+
10
R
EXT
AV
DD
DV
DD
AGND DGND OGND
OV
DD
GS2 GS1
GS0
OE
CLK
RS
Reset
.01
+
+
Figure 2b
–
Typical Interface Circuit
+
+A5V
+D3.3/5V
+
FB1
FB3
FB2
0.1
10
0.1
10
Mini-Circuit
T1-6T
Transformer
V
IN
+
V
IN
–
V
CM
A
IN
16
D0
–
15
Logic
Interfacing
Circuit
SPT8100
BIAS
C
BIAS
R
.01
1.43K
R
T
(50)
RDY
OVR
Gain Control
Output
Enable
(active Hi)
Clock
Input
V
RT
V
RB
+
10 0.1 1nF
R
EXT
AV
DD
DV
DD
AGND DGND
OGND
OV
DD
GS2 GS1
GS0
OE
CLK
RS
Reset
1.0
+
0.1
4.7
+
Notes:
1. To avoid device latch-up, closely follow either figure 2a or 2b, depending on what is available in the system. The difference between figure 2a
and 2b is in the grounding.
2. FB = ferrite bead. FB1 must be placed as close to the device as possible.
3. R
EXT
= 1.43 k
, optimized for
S
= 5 MSPS. Refer to the above table for recommended value of R
EXT
with respect to
S
and
IN
.
4. R
T
is A
IN
source termination resistor.
5. Power supplies and references pins must have adequate decoupling. Surface-mount capacitors are highly recommended. The smallest value
of capacitors are to be placed as close to the pin as possible.
S
(MSPS) R
EXT
(k
)
IN
–
5
–
2
–
5
–
2
1.43
2.00
1.24
1.00
<2 MHz
<2 MHz
2 MHz
2 MHz
800
–
R
EXT
–
2.5 k
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