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LT1328

4Mbps IrDA

Infrared Receiver

FEATURES

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SIR, FIR and 4ppm Compatible

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Low Frequency Ambient Rejection Loop

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Supply Current: 2mA

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8-Lead MSOP and SO Packages

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5V Single Supply Operation

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Optional High Frequency Noise Rejection

The LT

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—a 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’s 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.

IrDA Receiver

IrDA Transmitter

, LTC and LT are registered trademarks of Linear Technology Corporation.

IrDA is a registered trademark of the Infrared Data Association.

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IrDA Applications

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Sharp/Newton

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TV Remote

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Noncontact Telemetry

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Wireless Slave for Photographic Flash

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Keyless Entry

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Optical Data Transfer

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Infrared Home Control Systems

1

2

3

4

8

7

6

5

IN

FILTER

GND

MODE

DATA

FILTER

SWITCH

HIGH: SIR

LOW: FIR AND 4ppm

(OPTIONAL)

OPTIONAL

SHUTDOWN

CIRCUIT

C1

10nF

C6

1000pF

TTL

DATA OUT

LT1328

1328 TA01

C4

330pF

D1

C2

4.7

µF

*SILICONIX

LIGHT IN

TEMIC

BPV22NF

5V

5V

ENABLE

TP0610L*

R3

3.9

Ω

1/2W

R2

10k

R1

100

Ω

D2

HSDL-4220*

Q3

2N7002

C5

4.7

µF

*HEWLETT PACKARD

TRANSMIT

INPUT

1328 TA02