�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½
�½�½�½�½
�½ �½ �½ �½ �½ �½ �½ �½ �½ �½ �½ �½ �½ �½ �½
�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½
INTRODUCTION
Fast, easy breadboarding of circuits using the PA60EU are
possible with the PB80 PC board. Mounting holes are provided
and the provision for standard banana jacks simplifies connec-
tion and testing. The amplifier may be mounted horizontally or
vertically. Components are labeled on both sides of the board
for ease in probing.
A multitude of circuit configurations are possible, so only
several component locations have specific functions and will
usually be necessary:
C5,C8
Power supply bypasses
MUST
be used. Usually
ceramic types of 0.01 to 1.0µF.
C2, C9
Power supply bypass. Suggest 10µF per ampere of
output current.
R1
Feedback resistor.
R3
Input resistor.
R8, C10
Snubber network.
R4, C7
Noise gain compensation. Necessary only occasion-
ally, see Application Notes 19 and 25.
The following locations should be jumpered unless used (their
most common anticipated function is listed).
R2, R10
Input protection.
CR1
V
BOOST
.
R5, R6, R9
Output current sense.
The function of any other components is up to the designer’s
needs and imagination.
PA60EU CONSIDERATIONS:
When using the EK26 for the PA60EU the following com-
ponents on the schematic below must be left either shorted
or open:
Short: R109, R209
Open: CR101, C106, CR201, C206
EQUIVALENT SCHEMATIC
GND
C103
–IN 1
C104
R101
C101
C102
C105
2
R104
R107
R111
C107
R102
R110
C108
C109
GND
R201
C201
CR201
–IN 2
R203
R204
R207
R211
C207
R202
R210
11
VCC
+V
CR101
7
VCC
VEE
R103
C106 CR102
35
4
R109
R108
C110
CR103
–V
R105
R106
OUT 1
GND
1
6
+IN 1
C111
C112
C203
C204
C206 CR202
10
9
R209
R208
C210
CR203
8
R205
R206
OUT2
GND
12
VEE
+IN 2
C211
C212
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
1
APEX [ CIRRUS LOGIC ]
