TSH511_07 Datasheet, PDF (1/25 Pages) STMicroelectronics – Hi-fi stereo/mono infrared receiver and stereo sub-carrier demodulator

TSH511
Hi-fi stereo/mono infrared receiver
and stereo sub-carrier demodulator
Features
■ Supply voltage: 2.3V to 5.5V
■ Carriers frequency range: 0.4MHz to 11MHz
■ Two FM receivers for stereo
■ Integrated audio buffers
■ Audio outputs: 20mW into 16 ohms
■ High sensitivity: 4µV @12dB SINAD
■ Flexibility: access pins for each section
■ Receiver 2 Standby for mono operation
Applications
■ Infrared hi-fi stereo receiver
■ Infrared multimedia headsets
■ Stereo sub-carrier demodulator
■ FM IF receiver systems
■ Power line carrier intercoms
Description
The TSH511 is a 0.4 to 11MHz dual FM receiver.
This circuit offers the functions needed for a
highly sensitive infrared hi-fi stereo receiver.
Featuring high input sensitivity and high input
dynamic range, each receiver integrates an RF
front-end LNA, an intermediate amplifier with 2
external filters, a voltage limiter, a quadrature FM
demodulator, and finally an audio buffer.
The integrated audio buffers are able to directly
drive a 16-ohm 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 enables
one receiver only, reducing the supply current.
F
TQFP44
10 x 10 mm
Pin connections
(top view)
44 43 42 41 40 39 38 37 36 35 34
1
2
3
amp.
4
5
LNA
6
7
8
9
amp.
10
11
33
32
Standby
limiter
FM demodulator
31
RX2
30
29
TSH511 ^Audio
28
buffers
27
RX1
limiter
Vref
FM demodulator
26
25
SQUELCH
24
23
12 13 14 15 16 17 18 19 20 21 22
The TSH511 forms a chipset with the dual
transmitter TSH512.
November 2007
Rev 5
1/25
www.st.com
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