SGS Thomson Microelectronics TSH511CFT, TSH511CF, TSH511 Datasheet

TSH511

HiFi 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 out puts: 20 mW into 16 ohms

■ High sensitivity: 4µV @12dB SINAD

■ Flexib ilit y : ac c e s s pin s f or each s ec ti o n

■ Receiver 2 Standby for mono operation

DESCRIPTION

The 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 inpu t sensitivity a nd high i nput dynamic range, each receiver integrates a 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 abl e to drive directly 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 enables one receiver only, reducing the supp ly current. The TSH511 forms a chipset with the du al transmitter TSH512.

APPLICATIONS

■ Infrared HiFi stereo receiver

■ Infrared Multimedia Headsets

■ Stereo sub-carrier demodulator

■ FM IF receiver systems

■ Power Line Carrier Intercoms

ORDER CODE

Part Number

TSH511CF -40°C to

TSH511CFT -40°C to

Temperature

Range

+85°C

Package Conditionning Marking

TQFP44 Tray TSH511C

TQFP44 Tape & reel TSH511C

PACKAGE

F

TQFP44

10 x 10 mm

PIN CONNECTION (top view)

424344

1

2

3

4

5

LNA

6

7

8

9

amp.

10

11

12 13 14 15 16 17 18 19 20 21 22

limiteramp.

limiter

FM demodulator

RX2

TSH511

RX1

FM demodulator

36

Vref

Standby

SQUELCH

3435

33

32

31

30

29

28

27

26

25

24

23

3738394041

Audio

Audio buffers

buffers

December 2002

1/18

TSH511

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

Vcc

Supply voltage

Toper Operating free air temperature range -40 to +85 °C

Tstg Storage temperature -65 to +150 °C

Tj Maximum junction temperature 150 °C

Rthjc Thermal resistance juncti on to case 14 °C/W

ESD

except

for pin 6

HBM: Human Body Model CDM: Charged Device Model MM: Machine Model

HBM: Human Body Model

ESD

only

for pin 6

CDM: Charged Device Model MM: Machine Model

Latch-up

1. All voltages values, except differential vol tage, are wit h respect to network gr ound terminal

2. ElectroS tatic Disch arge pulse (E SD pulse) sim ul ating a human body discharge of 10 0 pF through 1.5k

3. Discharge to Ground of a device that has been previously charged.

4. ElectroS tatic Disch arge pulse (E SD pulse) approximati ng a pulse of a ma chine or mec hanical equi pment.

5. Corporate ST Microelectr oni cs proced ure number 0018695

Class

5)

1)

2)

3)

4)

7V

2

1.5

0.2 1

1

0.1 A

Ω

kV

OPERATING CONDITIONS

Symbol Parameter Value Unit

Vcc Supply voltage 2.3 to 5.5 V

f

audio

f

carrier

BLOC DIAGRAM

Audio frequency range 20 to 20,000 Hz Carrier frequency range 0.4 to 11 MHz

BUF-IN2

MIX-OUT2

Standby

GND

3435363738

SQUELCH

BUF-IN2

GND

33

32

SBY1

SBY2

31

30

BUF-OUT2

29

VCC

28

DEC-OUT

27

GND

26

BUF-OUT1

25

MUTE-OUT

24

MUTE-INT

23

MUTE-IN

GND

AMP-I N2

VCC

LNA-OUT2

VCC

LNA-IN

GND

LNA-OUT1

VCC

AMP-I N1

DEC-LNA

DEC-LIM2B

GND

LIM-IN2

424344

limiteramp.

limiter

DEC-LIM2B

40

41

RX2

TSH511

RX1

AMP-OUT2

1

2

3

4

5

LNA

6

7

8

9

amp.

10

11

LIM-OUT2

DEC-LIM2A

39

FM demodulator

MIX-IN2

VCC

Audio

Audio buffers

buffers

Vref

2/18

12 13 14 15 16 17 18 19 20 21 22

MIX-IN1

DEC-LIM1B

LIM-IN1

AMP-OUT1

GND

AMP-OUT1

GND

DEC-LIM1B

VCC

MIX-OUT1

GND

MIX-OUT1

DEC-LIM1

LIM-OUT1

DEC-LIM1

LIM-OUT1

GND

BUF-IN1

PIN DESCRIPTION

TSH511

Pin Pin name related to

1 GND - - GROUND 2 AMP-IN2 RX2 I Intermediate amplifier input 3 VCC - - SUPPLY VOLTAGE 4 LNA-OUT2 RX2 O Low Noise Amplifier output 5 VCC - - SUPPLY VOLTAGE 6 LNA-IN RX1 & RX2 I Low Noise Amplifier input 7 GND - - GROUND 8 LNA-OUT1 RX1 O Low Noise Amplifier output 9 VCC - - SUPPLY VOLTAGE 10 AMP-IN1 RX1 I Intermediate amplifier input 11 DEC-LNA RX1 & RX2 - Decoupling capacitor 12 AMP-OUT1 RX1 O Intermediate amplifier input 13 GND - - GROUND 14 LIM-IN1 RX1 I Limiter input 15 DEC-LIM1A RX1 - Decoupling capacitor 16 LIM-OUT1 RX1 O Limiter output 17 DEC-LIM1B RX1 - Decoupling capacitor 18 MIX-IN1 RX1 I Mixer input 19 VCC - - SUPPLY VOLTAGE 20 MIX-OUT1 RX1 O Mixer output (demodulated audio signal) 21 GND - - GROUND 22 BUF-IN1 RX1 I Audio buffer input 23 MUTE-IN RX1 & RX2 I Noise amplifier input (Squelch circuit) 24 MUTE-INT RX1 & RX2 - Capacitor connection of the noise rectifier 25 MUTE-OUT RX1 & RX2 O Capacitor connection (ramp generator to mute the audio) 26 BUF-OUT1 RX1 O Audio buffer output 27 GND - - GROUND 28 DEC-OUT RX1 & RX2 - Decoupling capacitor of Audio buffers 29 VCC - - SUPPLY VOLTAGE 30 BUF-OUT2 RX2 O Audio buffer output 31 SBY2 RX1 & RX2 I Standby 2 32 SBY1 RX1 & RX2 I Standby 1 33 GND - - GROUND 34 BUF-IN2 RX2 I Audio buffer input 35 GND - - GROUND 36 MIX-OUT2 RX2 O Mixer output 37 VCC - - SUPPLY VOLTAGE 38 MIX-IN2 RX2 I Mixer input 39 DEC-LIM2A RX2 - Decoupling capacitor 40 LIM-OUT2 RX2 O Limiter output 41 DEC-LIM2B RX2 - Decoupling capacitor 42 LIM-IN2 RX2 I Limiter input 43 GND - - GROUND 44 AMP-OUT2 RX2 O Intermediate amplifier output

1. pin direction: I = inp ut pin, O = output pi n, - = pi n to connect to supply or deco upl i ng capacitors or external compo nents

direction

1)

Pin description

3/18

TSH511

TYPICAL SCHEMATIC

Stereo infrared receiver

4/18

TSH511

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 filtering, the amplified signals are limited and demodulated with quadrature demodulators. The two integrated audio buffers directly drive the stereo headphones. The aud io power reaches 2 The built-in squelch 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.

x20mW in two 16Ω loads.

Right

channel

Line inputs

Left

channel

LNA + ALC

Power supply:

2.3 to 5.5V

Icc < 20 mA stereo

IR stereo HiFi transmitter

(Television)

TSH512 TSH511

buffer2

TX2

VOX

TX1

buffer2

buffer1

SBY

Vcc

LED

F

i

H

.

2

photodiode

:

o

z

e

r

H

e

t

M

s

i

8

.

2

&

3

IR stereo HiFi receiver

(Headphones)

LNA

s

r

e

i

r

a

c

2.3 MHz

filter

RX2

RX1

filter

2.8 MHz

SQUELCH

SQUELCHSQUELCH

SBY1

SBY2

Vcc: 2.3 to 5.5V

Current < 15 m A

Audio

buffer2

Audio

buffer1

20 mW / 16 Ω

5/18

TSH511

MULTIMEDIA APPLICATION: HEADSET SIDE

The TSH511 recei ves the HiFi stereo sound f rom th e com pute r throu gh 2.3 and 2.8 MHz stereo infrared carriers. The access pins to the RF amplifiers allow the use of a 1.7 M H z reject filter to c ancel the t ransmitted signal of the microphone. The wide supply range (2.3 to 5.5 V) allows battery operation.

TSH511 & 512 supply:

2.3 to 5.5V, 25 mA

Voice transmittedto the PC

TSH512

LNA + ALC

MIC. BIAS

LNA + ALC

TX2

VOX

TX1

1.7 MHz

Band-pass

filter

buffer2

buffer1

SBY

HiFi stereofromthe PC:

2x 20 mW /16 Ω

Vcc

LED

TSH511

Audio

buffer2

Audio

buffer1

1.7 MHz

1.7 MHz reject

reject

filter

RX2

SQUELCH

RX1

SBY1

SBY2

SBY1

SBY2

SBY1

SBY2

filter

1.7 MHz

1.7 MHz reject

reject

Microphone Tx:

1.7 MHz

1.7 MHz carrier

carrier

2.3 MHz

Band-pass

filter

2.8 MHz

Band-pass

LNA

Stereo Rx:

2.3 & 2.8 MHz

photodiode

MULTIMEDIA APPLICATION: COMPUTER SIDE

In multimedia application, the TSH511 receives the voice of the user through the 1.7 MHz infrared carrier. The standby pins can disable the unused receiver and audio amplifier to reduce the supply current.

TSH511 & 512 supply:

2.3 to 5.5V, 24 mA

Voice from the headset microphoneHiFi stereo

mono Rx:

1.7 MHz

HiFi stereo Tx:

2.3 & 2.8 MHz

LED

buffer2

SBY

buffer1

TX2

VOX

TX1

TSH512

LNA + ALC

photodiode

Voice from the headset microphoneHiFi stereo

LNA

RX2

RX1

filter

1.7 MHz

Band-pass

TSH511

SQUELCH

SQUELCHSQUELCH

SBY2

SBY1

Vcc

Audio

buffer2

Audio

buffer 1

6/18