RC4200N Fairchild Semiconductor, RC4200N Datasheet - Page 13

• Manufacturer Part Number: RC4200N
• Description: Multipliers / Dividers DIP-8
• Manufacturer: Fairchild Semiconductor

Specifications of RC4200N

• Package / Case: PDIP-8
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: Through Hole
• Product: Multiplier & Divider
• Lead Free Status / Rohs Status: No

PRODUCT SPECIFICATION
Appendix 1—System Errors
There are four types of accuracy errors which affect overall
system performance. They are:
• Nonimearity—Incremental deviation from absolute
• Scaling Error—Linear deviation from absolute accuracy.
• Output Offset—Constant deviation from absolute
• Feedthrough.—Cross-product errors caused by input
This nonlinearity error in the transfer function of the
RC4200 is ±0.1% maximum (±0.03 maximum for the
RC4200A). That is,
The other system errors are caused by voltage offsets on the
inputs of the RC4200 and can be as high as ±3.0% (±2.0%
for RC4200A).
Notes:
1. The input circuits tend to become unstable at
2. This section will not deal with feedthrough which is
3. Not including resistor tolerance or output offset on the
4. For 50 µA
REV. 1.2.1 6/14/01
V
I
V
accuracy. See Note 1.
accuracy.
offsets and external circuit limitations. See Note 2.
V
3
X
I
250 µA (e.g., @ I
proportional to frequency of operation and caused by stray
capacitance and/or bandwidth limitations. (refer to
Figure 12.)
operational amplifier.
Y
0
1
, I
=
=
2
I
-------- - 0.1% F.S.
V
--------------- -
, I
1
I
I
4
X
V
4
2
R
R
V
Z
< 50 µA and linearity decreases when I
1
2
Y
I
R
------------ - 3.0% F.S.
R
1
, I
0
1
I
2
I
R
R
1
2
8
1
7
2
1
, I
4
2
= I
-V
4
Multiplier
RC4200
S
3
2
4
Figure 12.
= 500µA nonlinearity error
250 µA.
6
5
4
I
I
3
4
3 4
R
+V
R
O
4
Ideal Op-Amp
S
V
OS
= 0
65-1871
1
V
V
, I
Z
O
0.5%).
2
, I
4
>
Errors Caused by Input Offsets
System errors can be greatly reduced by externally trimming
the input offset voltages of the RC4200. (±3.0% F.S. for
RC4200 and ±0.1% for RC4200A.)
If X
Extended Range Circuit Errors
The extended range configurations have a disadvantage in
that additional accuracy errors may be introduced by resistor
product mismatching.
Multiplier
An error in resistor product matching will cause an
equivalent feedthrough or output offset error. See Figure 6.
R
R
R
Note:
*
V 0 =
V Y Feedthrough
V X Feedthrough
Scaling Error
Output Offset Error
1
2
a
X
R
R
R
OS
Output offset errors can always be trimmed out with the
output op amp offset adjust, VOS (R16).
OS
b
b
a
R 0 R 4
R 0 R 4
Figure 13. RC4200 with Input Offset Adjustment
+V
-V
+V
-V
= R
= R
= R
S
S
S
S
= X
CY
C
CX
V
V
V X V Y
R
X
OSX
Y
V Z
then V
R
d
R
d
d
± , V
, Y
± V
± , V
R
R
R
R
2
2
OS
V Z
1
O
1
1
0
V
--------------- -
offset (V
Y
V Y V OSX
X
= Y
X
V
8
1
7
2
feedthrough (V
V
feedthrough (V
Z
-V
OSY
Multiplier
Y
RC4200
S
3
R
------------ - ±0.3% F.S.
R
, Z
X
0
1
V X V OSY
R
R
= V
OS
4
2
6
5
4
Y
= -V
= 0) = ± V
X
Y
V 0 V OSZ
= 0) = ± V
OSZ
100 R
= 0) = I V
R
R
O
4
Ideal Op-Amp
3
,
4
V
OS
V
V OSX V OSY
REF
Z
= 0
65-1870
+V
-V
X
RC4200
Y
V
*
S
S
O
Z
OS
13