LT1328CMS8#TRPBF Linear Technology, LT1328CMS8#TRPBF Datasheet - Page 8
LT1328CMS8#TRPBF
Manufacturer Part Number
LT1328CMS8#TRPBF
Description
IC RECEIVER 4MBPS IRDA IR 8-MSOP
Manufacturer
Linear Technology
Type
Receiverr
Datasheet
1.LT1328CS8PBF.pdf
(12 pages)
Specifications of LT1328CMS8#TRPBF
Number Of Drivers/receivers
0/1
Protocol
Infrared (IRDA)
Voltage - Supply
4.5 V ~ 5.5 V
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
APPLICATIONS
LT1328
There is one drawback to the previous scheme. Lowering
the highpass frequency to 14Hz negates the normally
excellent ambient light rejection of the LT1328 to line-
operated light sources. By modulating the data in a very
simple and inexpensive way the ambient light rejection
can be maintained. The NRZ data is used to gate a 3MHz
square wave before driving the transmitter. The LT1328 in
FIR-4ppm mode (bandwidth of 1MHz to 4MHz) will re-
ceive the 3MHz signal. Thus, the low frequency response
is no longer required and the LT1328 can be configured as
TYPICAL APPLICATIONS
8
MASTER FLASH
LIGHT FROM
3
74LS00
R2
10k
C5
4.7 F
100
R1
U
3MHz
2
1
375bps NRZ DATA
INFORMATION
HAMAMATSU
5V
U
Figure 6. Simple Data Link with Improved Low Frequency Noise Rejection
Q3
2N7002
R3
3.9
1/2W
S4797-01
D2
HSDL 4220
D1
330pF
U
TRANSMITTER/RECEIVER
W
C4
BIT ERROR RATE
OUT
100
N
R1
Wireless Slave for Photographic Flash
NC
1
2
3
4
> 30"
IN
U
LT1328
5
BPV22NF
6
74LS123
8
7
6
5
TEMIC
100pF
C8
1/2
1N4148
a FIR receiver with no changes. Note that when in FIR/
4ppm mode, the LT1328 has excellent rejection to active-
ballast fluorescent lights (40kHz to 100kHz) as well as line
operated bulbs. The data is recovered with two stages of
retriggerable one-shots on the output of the LT1328. The
first one-shot pulse length is set to 80ns and acts as an
edge detector and the second one-shot pulse length is set
to 2.3 s, just under a symbol period. With this modula-
tion, the range can be extended to over 30" and still have
a bit error rate lower than 1 in 10
NC
NC
D1
D2
7
11
10
9
R2
1k
46.4k
1%
R5
R3
10k
C4
100pF
5V
NC
5V
Q1
MPS2907A
1%
R4
5k
R4
10k
1
2
3
4
13
15
LT1328
74LS123
10pF
MPSA42
C7
1/2
OF SLAVE FLASH
TO HOT SHOE
C2
4.7 F
Q2
14
1
2
3
8
7
6
5
8
1328 F06
.
R5
1k
1328 TA05
C6
1000pF
C2
4.7 F
D3
MUR
160524
C5
0.1 F
5V