RC4200
PRODUCT SPECIFICATION
Squaring Circuits Offset Adjust
+VREF
+V
S
R
R
R
a
b
I
R
5
d
c
I
R
100 R
=
7
R
8
9
d
R
1
8
7
R
Z OS
10
VX
(Input)
1
R
4
5
R
-VS
RC4200
Multiplier
R -R can be used to cancel all
10
7
µ
0.1
F
linearity errors caused by input
offsets and resistor product
mis-match (See Appendix 1).
R
1
1
2
I
2
R
6
RO
4
V
O (Output)
I
3
3
6
µ
0.1
F
-VS
RCX
+V
S
+V
S
R
R
14
16
VOS
R
13
-VS
R
15
-VS
0.1µ F
65-1874
Figure 11. Squaring Circuit Offset Adjust
10K ≤ R10 = R11 ≤ 50K
R8, R15 = 100Ω
VS
Procedure
1. Set both trimmer pots to 0V on the wiper.
2. Put in a full scale ( V ) squarewave on V input.
X
X
Adjust Z (R10) for uniform output.
OS
------
R9, R14 = 100Ω
0.1
3. Connect V input to ground. Adjust V (R ) for 0V
X
OS 11
||
on V outputs.
0
R5, R6 = R1 Ra
||
||
R16 = R0 Rc Ra
12
REV. 1.2.1 6/14/01
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
