TSH511 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

TSH511

Hi-fi stereo/mono infrared receiver and stereo sub-carrier demodulator

STMicroelectronics 

Application information

Figure 23. Headset side block diagram

TSH511

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

Vcc

SBY

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

Computer side

In multimedia applications, the TSH511 receives the voice of the user through the 1.7MHz

infrared carrier. The standby pins can disable the unused receiver and audio amplifier to

reduce the supply current (see Figure 24).

Figure 24. Computer side block diagram

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

16/25

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