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TSH511CF-TSH511CFT
HIFI STEREO/MONO INFRARED RECEIVER STEREO SUB-CARRIER DEMODULATOR
TSH511HiFi stereo/mono infrared receiver
Stereo sub-carrier demodulator Supply voltage: 2.3V to 5.5V� Carriers frequency range: 0.4 to 11 MHz� Two FM receivers for stereo� Integrated audio buffers� Audio outputs: 20 mW into 16 ohms�
High sensitivity: 4μV @12dB SINAD� Flexibility: access pins for each section � Receiver 2 Standby for mono operation
DESCRIPTIONThe TSH511 is a 0.4 to 11 MHz dual FM receiver.
This circuit offers the functions needed for a highly
sensitive infrared HiFi STEREO receiver.
Featuring high input sensitivity and high input dy-
namic range, each receiver integrates a RF
front-end LNA, an intermediate amplifier with 2 ex-
ternal filters, a voltage limiter, a quadrature FM de-
modulator, and finally an audio buffer.
The integrated audio buffers are able to drive di-
rectly a 16 ohms headphone with 20mW.
A SQUELCH circuit mutes both audio amplifiers.
Access pins to each section makes the TSH511
suited for a wide field of applications.
For MONO applications, the STANDBY pin en-
ables one receiver only, reducing the supply cur-
rent.
The TSH511 forms a chipset with the dual trans-
mitter TSH512.
APPLICATIONS Infrared HiFi stereo receiver� Infrared Multimedia Headsets� Stereo sub-carrier demodulator� FM IF receiver systems� Power Line Carrier Intercoms
ORDER CODE
PACKAGE
PIN CONNECTION (top view)
TSH511TSH511
ABSOLUTE MAXIMUM RATINGS
OPERATING CONDITIONS
BLOC DIAGRAM All voltages values, except differential voltage, are with respect to network ground terminal ElectroStatic Discharge pulse (ESD pulse) simulating a human body discharge of 100 pF through 1.5kΩ Discharge to Ground of a device that has been previously charged. ElectroStatic Discharge pulse (ESD pulse) approximating a pulse of a machine or mechanical equipment. Corporate ST Microelectronics procedure number 0018695
TSH511
PIN DESCRIPTION pin direction: I = input pin, O = output pin, - = pin to connect to supply or decoupling capacitors or external components
TSH511
TYPICAL SCHEMATICStereo infrared receiver
TSH511
INFRARED STEREO HEADPHONE APPLICATIONThe 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 2x20mW in two 16Ω loads.
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.
