TSH511C(2002) データシートの表示（PDF） - STMicroelectronics

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TSH511C
(Rev.:2002)

HiFi stereo/mono infrared receiver Stereo sub-carrier demodulator

STMicroelectronics 

TSH511

MULTIMEDIA APPLICATION: HEADSET SIDE

The TSH511 receives the HiFi stereo sound from the computer through 2.3 and 2.8 MHz stereo infrared

carriers. The access pins to the RF amplifiers allow the use of a 1.7 MHz reject filter to cancel the trans-

mitted signal of the microphone. The wide supply range (2.3 to 5.5 V) allows battery operation.

TSH511 & 512 supply:

2.3 to 5.5V, 25 mA

Voice transmitted to the PC

HiFi stereo from the PC:

2x 20 mW /16 Ω

TSH511

Audio

buffer2

TSH512

LNA + ALC

MIC. BIAS

MIC. BIAS

LNA + ALC

TX2

VOX

TX1

buffer2

SBY

Vcc

Vcc

LED

buffer1

1.7 MHz filter

Band-pass

Audio

buffer1

1.7 MHz

reject

filter

2.3 MHz

Band-pass

filter

RX2

LNA

RX1

filter

1.7 MHz

reject

filter

2.8 MHz

Band-pass

Microphone Tx:

1.7 MHz

carrier

photodiode

Stereo Rx:

2.3 & 2.8 MHz

MULTIMEDIA APPLICATION: COMPUTER SIDE

In multimedia application, the TSH511 receives the voice of the user through the 1.7 MHz infrared carrier.

The standby pins can disable the unused receiver and audio amplifier to reduce the supply current.

TSH511 & 512 supply:

2.3 to 5.5V, 24 mA

mono Rx:

1.7 MHz

HiFi stereo

HiFi stereo Tx:

2.3 & 2.8 MHz

buffer2

TX2

SBY

LED

VOX

buffer1

TX1

TSH512

LNA + ALC

LNA + ALC

Voice from the headset microphone

photodiode

LNA

TSH511

Audio

buffer2

RX2

RX1

Audio

buffer1

filter

1.7 MHz

Band-pass

Vcc

6/18

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