TSH511 ST Microelectronics, Inc., TSH511 Datasheet - Page 5

• Manufacturer Part Number: TSH511
• Description: Hifi Stereo/mono Infrared Receiver Stereo Sub-carrier Demodulator
• Manufacturer: ST Microelectronics, Inc.

INFRARED STEREO HEADPHONE APPLICATION
The right side of the figure shows the block-diagram of an infrared stereo receiver using the TSH511. The
sensitive LNA directly connected to the photodiode does not require an external pre-amplifier. After filter-
ing, the amplified signals are limited and demodulated with quadrature demodulators. The two integrated
audio buffers directly drive the stereo headphones. The audio power reaches 2
The built-in squelch function fades-out the audio when the incoming infrared signal is low. The standby in-
puts SBY1 and SBY2 enable only one receiver for the mono applications.
Line inputs
Line inputs
channel
channel
Left
Left
channel
channel
Right
Right
LNA + ALC
LNA + ALC
LNA + ALC
LNA + ALC
Icc < 20 mA stereo
Icc < 20 mA stereo
Power supply:
Power supply:
2.3 to 5.5V
2.3 to 5.5V
IR stereo HiFi transmitter
IR stereo HiFi transmitter
TSH512
TSH512
VOX
VOX
TX2
TX2
TX1
TX1
(Television)
(Television)
buffer2
buffer2
buffer1
buffer1
SBY
SBY
Vcc
Vcc
LED
LED
photodiode
photodiode
IR stereo HiFi receiver
IR stereo HiFi receiver
LNA
LNA
(Headphones)
(Headphones)
2.3 MHz
2.3 MHz
2.8 MHz
2.8 MHz
RX2
RX2
RX1
RX1
filter
filter
filter
filter
TSH511
TSH511
x
20mW in two 16 loads.
buffer2
buffer2
buffer1
buffer1
Audio
Audio
Audio
Audio
Current < 15 mA
Current < 15 mA
Vcc: 2.3 to 5.5V
Vcc: 2.3 to 5.5V
20 mW / 16
20 mW / 16
20 mW / 16
20 mW / 16
TSH511
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