LT1328
4Mbps IrDA
Infrared Receiver
FEATURES
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DESCRIPTION
The LT
廬
1328 is a photodiode receiver that supports IrDA
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data rates up to 4Mbps as well as other modulation
methods such as Sharp ASK and TV remote control. The
LT1328 MSOP contains all the necessary circuitry to
convert current pulses from an external photodiode to a
digital TTL output while rejecting unwanted lower fre-
quency interference. The LT1328 plus five external com-
ponents is all that is required to make an IrDA compatible
receiver.
Power requirements for the LT1328 are minimal鈥攁 single
5V supply and 2mA of quiescent current. Internal high-
pass filtering attenuates interfering signals such as sunlight,
incandescent and fluorescent lamps and is selectable at
Pin 7 for low or high data rates. The LT1328鈥檚 ease of use
and flexibility make it an ideal solution for numerous other
photodiode receiver applications. The LT1328 is available
in the SO-8 as well as the tiny MSOP for size-critical
applications.
, LTC and LT are registered trademarks of Linear Technology Corporation.
IrDA is a registered trademark of the Infrared Data Association.
SIR, FIR and 4ppm Compatible
Low Frequency Ambient Rejection Loop
Supply Current: 2mA
8-Lead MSOP and SO Packages
5V Single Supply Operation
Optional High Frequency Noise Rejection
APPLICATIONS
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IrDA Applications
Sharp/Newton
TV Remote
Noncontact Telemetry
Wireless Slave for Photographic Flash
Keyless Entry
Optical Data Transfer
Infrared Home Control Systems
TYPICAL APPLICATIONS
N
IrDA Receiver
C6
1000pF
8
7
5V
C2
4.7碌F
ENABLE
*SILICONIX
1328 TA01
LT1328
1
LIGHT IN
TEMIC
BPV22NF
D1
C1
10nF
C4
330pF
2
IN
V
BIAS
HIGH: SIR
LOW: FIR AND 4ppm
(OPTIONAL)
OPTIONAL
SHUTDOWN
CIRCUIT
TP0610L*
5V
FILTER MODE
3 FILTER
6
V
CC
SWITCH
4
5
DATA
GND
TTL
DATA OUT
TRANSMIT
INPUT
U
U
U
IrDA Transmitter
V
CC
C5
4.7碌F
D2
HSDL-4220*
R3
3.9鈩?/div>
1/2W
Q3
2N7002
R1
100鈩?/div>
R2
10k
*HEWLETT PACKARD
1328 TA02
1
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