Suggested Board Layout
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Output Voltage Trim
This diagram illustrates a simple
board layout for use with the
SRS10A-12
series. As recom-
mended, external components
are placed as close to the unit
as possible. To help shield exter-
nal circuitry, the ground plane
has been extended under the
unit. Any signal traces should
not be routed underneath the
unit (unless they are on a layer
under the ground plane) to avoid
unwanted noise interference.
The output voltage level of the
SRS10A-12
series is
adjustable over a wide range by the simple addition
of an external resistor. This trim resistor is connected
between the circuit common and the trim input (pin
10), as shown in the diagram above.
SRS10A-12-5.0
V
OUT
(VDC)
R
TRIM
(k )
0.75
Open
1.20
22.33
1.50
13.00
1.80
9.00
2.00
7.40
2.50
5.00
3.30
3.12
5.00
1.47
The required resistor value for various output levels
is given in the table above. To calculate the correct
value for a different output level, the formula is:
Pin Connections
Pin
1
2
3
4
5
Description
+V Output
Sense
+V Output
+V Output
Common
Pin
6
7
8
10
11
Description
Common
+V Input
+V Input
Trim
Remote On/Off
R
TRIM
= (
10, 500
- 1, 000)
- 0.75
V
OUT
Mechanical Dimensions
Where: R
TRIM
= The external trim resistor
V
OUT
= The desired output voltage
If a trim resistor is not connected, the output goes
to 0.75 VDC.
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292 Page Street Ste D Stoughton, MA 02072
•
Notes:
•
All dimensions are typical in inches (mm)
•
Tolerance x.xx =
±
0.02 (
±
0.50)
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•
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