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参数资料
| 型号： | RC4200MT |
| 厂商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分类： | 模拟运算功能 |
| 中文描述： | ANALOG MULTIPLIER OR DIVIDER, PDSO8 |
| 封装： | SOIC-8 |
| 文件页数： | 25/25页 |
| 文件大小： | 265K |
| 代理商： | RC4200MT |
PRODUCT SPECIFICATION
RC4200
REV. 1.2.1 6/14/01
9
Divider Circuit Offset Adjustment Procedure
1.
Set each trimmer pot to 0V on the wiper.
2.
Connect VX (input) to ground. Put a DC voltage of
approximatey 1/2 VZ (max.) DC on the VZ (input) with
an AC (squarewave is easiest) voltage of 1/2 VZ (max.)
peak-to-peak superimposed on it. Adjust XOS (R5) for
zero feedthrough. (No AC at V0)
3.
Connect VX (input) to VZ (input) and put in the
1/2 VZ(max.) DC with an AC of approximately 20 mV
less than VZ(max.).
Adjust ZOS (R13) for zero feedthrough.
4.
Return VX (Input) to ground and connect VZ(max.)
DC on VZ(input). Adjust output VOS(R17) for VO =
0VO
5.
Connect VX (input) to VZ (input) and and in VZ (max.)
DC. (The output will equal K.) Decrease the input
slowly until the output (V0 - K) deviates beyond the
desired accuracy. Adjust ZOS to bring it back into toler-
ance and return to Step 4. Continue steps 4 and 5 until
VZ reduces to the lowest value desired.
Notice that as the input to VX and VZ gets closer to zero (an
illegal state) the system noise will predominate so much that
an integrating voltmeter will be very helpful.
Square Root Circuit V0 = N
√VX
Figure 8.
1/2 V (Max.)
z
V (Max.)
1/2 V (Max.)
0V
z
10 mV
~
V (Max.)
1/2 V (Max.)
0V
z
65-1868
65-1877
RC4200
Multiplier
V
(Input)
S
X
O
S
ao
Ra
Rb
R1
R
-V
I3
R
V
(Output)
+V
S
-V
3
6
4
5
8
7
1
2
Rc
Rd
I2
I1
I4
REF
+V
R4
V
X
V
REF
R
1
R
b
-------------------------
V
REF
2
R
a
R
b
----------------
V
0
V
REF
R
ao
R
b
------------------------
++
V
0
2
R
0
R
4
--------------
V
0
V
REF
R
c
R
4
------------------------
V
0
V
REF
R
0
R
d
------------------------
V
REF
2
R
c
R
d
----------------
+++
=
If R
a
R
b
R
c
R
d
and R
ao
R
b
R
0
R
d
+ R
ao
R
b
R
c
R
4
R
c
R
d
R
0
R
4
==
Then
V
0
2
R
0
R
4
--------------
V
X
V
REF
R
1
R
b
------------------------- or V
0
2
V
X
K where K =
V
REF
R
0
R
4
R
1
R
b
-------------------------------
==
and V
0
NV
X
where N =
K
=
0V
X
V
X
max.
()and V
0
max.
()
≤≤
NV
X
max.
()
=
N
V
0
V
X
------------- Design Requirements
()
=
R
1
V
0
max.
()2
74
AN
2
----------------------------
=
R
a
R
d
V
REF
50
A
----------------
==
R
b
R
c
V
REF
150
A
-----------------
==
R
4
V
0
max.
()
50
A
------------------------
=
R
ao
V
0
max.
()
125
A
------------------------
=
R
0
V
0
max.
()
225
A
------------------------
=
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