2
DEMO MANUAL DC112A
PACKAGE A
N
D SCHE
M
ATIC DIAGRA
M
S
W
W
U
R3
6.3
Ω
1/2W
R2
10k
5%
R1
100
Ω
5%
D2
HSDL-4220
Q1
2N7002
Q2
2N7002
E5 GND
E6 TRANS
V
CC
DC112A TA02
1
2
3
4
8
7
6
5
IN
FILT
GND
SHDN
MODE
V
CC
DATA
C1
10nF
C6
1000pF
U1
LT1328CS8
DC112A TA01
C4
330pF
C2
0.1
µ
F
D1
BPV22NF
C3
10
µ
F
FILTER
SWITCH
E3 V
CC
E2 MODE
E4 DATA
E1 GND
+
V
CC
1
2
JP1
3
–
+
R
FB
50k
1.5V
V
CC
R
IN
2k
D1
PHOTODIODE
TEMIC
BPV22NF
C1
10nF
IN
1
8
V
BIAS
6
5V
C3
10
µ
F
V
CC
7
MODE
5
DC112A BD
DATA
FILTER
2
FILTER SWITCH
3
GND
4
PREAMP
DC SERVO
FILTER
g
m
60k
+
–
–
+
COMP
BIAS
C4
330pF
C6
1000pF
HIGH: SIR
LOW: FIR AND 4PPM
C2
0.1
µ
F
+
Figure 1. LT1328 Block Diagram
Figure 2a. IrDA Receiver
Figure 2b. IrDA Transmitter
1
2
3
4
IN
FILTER
FILTER SWITCH
GND
8
7
6
5
V
BIAS
MODE
V
CC
DATA
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
LT1328CMS8
1
2
3
4
8
7
6
5
TOP VIEW
S8 PACKAGE
8-LEAD PLASTIC SO
IN
FILTER
GND
V
BIAS
MODE
V
CC
DATA
FILTER
SWITCH
LT1328CS8
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