TSH511CF STMicroelectronics, TSH511CF Datasheet - Page 14

• Manufacturer Part Number: TSH511CF
• Description: IC RECEIVER DUAL FM 44-TQFP
• Manufacturer: STMicroelectronics

Specifications of TSH511CF

• Frequency: 2.3MHz and 2.8MHz
• Sensitivity: -95dBm
• Modulation Or Protocol: FM
• Applications: Infrared Headsets, Infrared Hi-Fi Stereo Transmitters
• Current - Receiving: 15mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• For Use With: 497-8516 - BLANK PCB W/ BOM FOR TSH511/12
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Data Rate - Maximum: -
• Other names: 497-2322

Application information
7
7.1
Figure 21. Hi-fi stereo headphone block diagram
14/25
Line inputs
Line inputs
channel
channel
Left
Left
channel
channel
Right
Right
LNA + ALC
LNA + ALC
LNA + ALC
LNA + ALC
Application information
This section provides application information for some typical applications.
Infrared stereo headphone application
The right side of
TSH511. The sensitive LNA, directly connected to the photo diode, does not require an
external pre-amplifier. After filtering, the amplified signals are limited and demodulated with
quadrature demodulators. The two integrated audio buffers directly drive the stereo
headphones. The audio power reaches 2x20mW in two 16
function fades out the audio when the incoming infrared signal is low. The standby inputs
SBY1 and SBY2 enable only one receiver for the mono applications.
The infrared carriers are detected by the photo diode and the signal is directly amplified by
the TSH511. Each receiver has a standard bandpass filter (filters F1 & F2) to select the
2.3MHz and 2.8MHz carriers. After the FM demodulators, the potentiometer P1 controls the
volume levels. The stereo headphones are directly connected to the integrated audio
buffers. The potentiometer P2 allows adjustment of the sensitivity of the Squelch. The
Squelch function fades in and fades out the audio signal, depending on the level of the
2.8MHz carrier.
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)
Figure 21
buffer2
buffer2
buffer1
buffer1
SBY
SBY
shows the block diagram of an infrared stereo receiver using the
Vcc
Vcc
LED
LED
photodiode
photodiode
IR stereo HiFi receiver
IR stereo HiFi receiver
LNA
LNA
(Headphones)
(Headphones)
Ω
2.3 MHz
2.3 MHz
2.8 MHz
2.8 MHz
RX2
RX2
RX1
RX1
loads. The built-in squelch
filter
filter
filter
filter
TSH511
TSH511
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 Ω
20 mW / 16 Ω
20 mW / 16 Ω
20 mW / 16 Ω
TSH511