Application Information (Continued)
DS100014-31
LM4832 SAMPLE LAYOUT
LAYOUT PARTS LIST
LAYOUT PARTS LIST
Type
Name
Quantity
Name
Type
Quantity
Connectors:
Capacitors:
Banana Jack
Black
COUT
1000 µF, elec.,
Digikey #P6205
4
Mouser #164-6218
Mouser #164-6218
Mouser #16PJ097
Shogyo #JJ-0357-3RT
3
3
7
1
Red
CMOUT
CS
47 µF, elec., Digikey #P5202
0.33 µF, film, Digikey #P4669
1
3
4
RCA Jack
Stereo
Headphone
CTONE
8200 pF, ceramic,
Digikey #P4823
Mono Miniplug Shogyo #JJ-0357-B
2
1
CLIN, CMIN, CIN 1 µF, film, Digikey #E1105
6
1
36-pin
Centronics
Digikey #1036RF
CB
0.33 µF, film,
Digikey #EF1334
LAYOUT DESCRIPTION
C1
0.1 µF, film, Digikey #EF1104
1
The layout given in the following pages is meant to be con-
nected to a PC by a parallel port (printer) cable. The board is
controlled by software for a Windows PC. The parallel cable
must be the standard type used for hooking up a printer to a
PC: one end is a DB-25 connector andthe other is a 36 pin
Centronics connector.
Resistors (all resistors: Digikey #(Value)QBK):
R1
20 kΩ, 1/4W
680 kΩ, 1/4W
1 kΩ, 1/4W
1
1
1
1
1
R2
Banana connections are provided for VDD, ground, and am-
plifier outputs. Amplifier outputs are also routed to a stereo
headphone jack. RCA connections are provided for amplifier
inputs, loop in, loop out, and microphone out. Mono mini-
plug connectors are provided for microphone inputs.
RDATA
RGND
RPD
100Ω, 1/4W
100 kΩ, 1/4W
If required, microphones can be biased using the resistors
RMIC1 and RMIC2
.
This layout is set up to allow the use of the internal tone-
control circuitry or the external loop. The jumper next to each
CLIN capacitor controls which route the signal should take.
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NSC [ National Semiconductor ]
