TSH511 ST Microelectronics, Inc., TSH511 Datasheet

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TSH511

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

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TSH511C
Manufacturer:
ST
0
Part Number:
TSH511CF
Manufacturer:
ST
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Part Number:
TSH511CFT
Manufacturer:
ST
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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 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
ORDER CODE
December 2002
TSH511CF
TSH511CFT
Part Number
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
Infrared HiFi stereo receiver
Infrared Multimedia Headsets
Stereo sub-carrier demodulator
FM IF receiver systems
Power Line Carrier Intercoms
Temperature
-40°C to
-40°C to
Range
+85°C
+85°C
Package
TQFP44
TQFP44
Conditionning
Tape & reel
Tray
TSH511C
TSH511C
Marking
HiFi stereo/mono infrared receiver
Stereo sub-carrier demodulator
PACKAGE
PIN CONNECTION (top view)
10
10
11
11
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
amp.
amp.
amp.
amp.
44
44
12
12
LNA
LNA
43
43
13
13
42
42
14
14
limiter
limiter
limiter
limiter
41
41
15
15
RX2
RX2
RX1
RX1
TSH511
TSH511
10 x 10 mm
40
40
16
16
TQFP44
FM demodulator
FM demodulator
FM demodulator
FM demodulator
39
39
17
17
F
38
38
18
18
37
37
19
19
TSH511
TSH511
Audio
Audio
buffers
buffers
36
36
Vref
Vref
20
20
Standby
Standby
35
35
21
21
SQUELCH
SQUELCH
34
34
22
22
33
33
32
32
31
31
30
30
29
29
28
28
27
27
26
26
25
25
24
24
23
23
1/18

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TSH511 Summary of contents

Page 1

... High sensitivity: 4µV @12dB SINAD Flexibility: access pins for each section Receiver 2 Standby for mono operation DESCRIPTION The TSH511 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- ...

Page 2

... Standby Standby demodulator FM demodulator amp. amp. limiter limiter RX2 RX2 LNA LNA TSH511 TSH511 Audio Audio 6 6 buffers buffers RX1 RX1 Vref Vref 9 9 limiter limiter amp. amp. FM demodulator FM demodulator ...

Page 3

... Capacitor connection (ramp generator to mute the audio) O Audio buffer output - GROUND - Decoupling capacitor of Audio buffers - SUPPLY VOLTAGE O Audio buffer output I Standby 2 I Standby 1 - GROUND I Audio buffer input - GROUND O Mixer output - SUPPLY VOLTAGE I Mixer input - Decoupling capacitor O Limiter output - Decoupling capacitor I Limiter input - GROUND O Intermediate amplifier output TSH511 3/18 ...

Page 4

... TSH511 TYPICAL SCHEMATIC Stereo infrared receiver 4/18 ...

Page 5

... 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 ...

Page 6

... Band-pass Band-pass 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: TSH511 & 512 supply: 2 ...

Page 7

... RMS psophometric filter ZL MHz carrier LNA_IN C LNA_IN LNA_IN ZL ZL =10 MHz carrier ZL ZL =10 MHz carrier TSH511 Min Typ Max Unit 9.5 11 µV RMS , µV RMS 60 0 ...

Page 8

... TSH511 Symbol Parameter Amplifier (AMP) Section G Amplifier Voltage Gain AMP Input impedance defined as Z AMP_IN R in parallel with C AMP_IN Z Output impedance AMP_OUT P 1dB compression point 1dBAMP BW -3dB AMP Bandwidth AMP Limitor (LIM) Section G Voltage gain LIM Input impedance defined as Z LIM_IN ...

Page 9

... OFF Standby mode Test condition Min ZL 70mV OD_IN RMS Vout = 0 RMS Z = 10k L with decoupling capacitor CDEC = 1µF/ceramic on pin 28. Pout = 20 mW Pout = TSH511 Typ Max Unit 200 k 35 kHz 20 mW 0.2 0.3 % 0. 0.5 µs 0.5 µ ...

Page 10

... TSH511 OVERALL CIRCUIT Supply current vs. Supply voltage 20 RX1+RX2+Buffers 18 16 RX1+Buffers RX1+ (RX1 Buffer (V) CC S/N vs. 2.8 MHz Input Level 60 50 PSOPH 100 Input Level ( V) PSOPH: Signal on Noise Ratio curve measured with a CCITT standard psophometric bandpass characteristic. It approximates the response of human hearing ...

Page 11

... Output THD+N vs. Output Power ( kHz 5.5V CC 0.1 100 Output THD+N vs. Output Power (RL = 600 ) 600 kHz kHz 0.1 10 TSH511 kHz kHz 2 100 P (mW) OUT-BUF kHz 2.7 V ...

Page 12

... TSH511 Output THD+N vs. Output Voltage (RL = 10k ) 2. kHz kHz 5.5V CC 0.1 0 OUT-BUF rms Output THD+N vs. Frequency ( 2 rms 0.1 100 1000 20 Frequency (Hz) Output THD+N vs. Frequency (RL = 600 2 rms ...

Page 13

... Output Power vs. Temperature -40 - (°C) AMB RMS TSH511 13/18 ...

Page 14

... TSH511 GENERAL DESCRIPTION The TSH511 MHz dual FM analogue receiver. The incoming signal is amplified with Low Noise Amplifier (LNA section). The good noise performance of the LNA allows the photodiode for infrared applications to be connect- ed directly to the TSH511 without any external preamplifier ...

Page 15

... Figure demodulator schematic SQUELCH section To avoid audio ’FM noise’ at the speakers when no carrier is received, the TSH511 has a built-in Squelch circuit. The Squelch detects the wide- band ’FM noise’ on the demodulated output and fades-out the audio of both audio buffers. ...

Page 16

... Standby section Depending on the states of the logic inputs SBY1 and SBY2, RX2 and the Audio Buffer2 can be disabled separately. The TSH511 receiver can adapt to different applications by using SBY1 & SBY2 standby pins: SBY1 SBY2 ...

Page 17

... APPLICATION SCHEMATIC The infrared carriers are detected by the photodiode and the signal is directly amplified by the TSH511. Optional reject filters can be added in each channel to improve crosstalk performances. Each receiver has a standard bandpass filter (filters F1 & F3) to select the 2.3 and 2.8 MHz carriers. After the FM demodulators, the potentiometers P1 and P2 control the volume levels ...

Page 18

... TSH511 PACKAGE MECHANICAL DATA 44 PINS - PLASTIC PACKAGE Dimensions Min 0.05 A2 1.35 B 0. Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use ...

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