Philips tea6822t DATASHEETS

INTEGRATED CIRCUITS

DATA SH EET

TEA6822T

In Car Entertainment (ICE) car radio

Preliminary speciﬁcation File under Integrated Circuits, IC01

1995 Nov 22

Philips Semiconductors Preliminary speciﬁcation

In Car Entertainment (ICE) car radio TEA6822T

FEATURES General

• FM mixer for conversion from FM-IF1 = 72.2 MHz to FM-IF2 = 10.7 MHz

• AM mixer for conversion from AM-IF1 = 10.7 MHz to AM-IF2 = 450 kHz

• FM-IF gain stage

• Crystal oscillator providing mixer frequencies and

references for IF-count and stereo decoder

• FM quadrature demodulator with automatic centre frequency adjustment and THD compensation

• Level, multi-path and noise detectors

• Soft mute

• Stereo noise cancelling and variable de-emphasis

• PLL stereo decoder

• Noise blanker

• AM IF-amplifier and demodulator

2

• I

C-bus transceiver with interface to enable direct data

transfer to radio front-end

• IF-count for AM and FM

• Reference frequency generation for PLL synthesizer.

Stereo decoder

• Adjustment-free PLL-VCO

• Pilot depending mono/stereo switching

• Analog control of mono/stereo blend

• Adjacent channel noise suppression (114 kHz)

• Pilot cancelled

• Analog control of de-emphasis

• Integrated low-pass filters for 190 kHz adjacent channel

interferences and signal delay for interference absorption circuit.

GENERAL DESCRIPTION

The TEA6822T together with the TEA6810T/TEA6811T forms an AM/FM electronic tuned car radio in a double conversion receiver concept.

ORDERING INFORMATION

TYPE NUMBER

NAME DESCRIPTION VERSION

TEA6822T VSO56 plastic very small outline package; 56 leads SOT190-1

PACKAGE

1995 Nov 22 2

Philips Semiconductors Preliminary speciﬁcation

In Car Entertainment (ICE) car radio TEA6822T

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

V

DDA1

I

DDA1

I

19+I20

I

22+I23

V

DDA2

I

DDA2

V

DDA3

I

DDA3

V

DDD

I

DDD

SN+

-------------N

THD total harmonic distortion FM mode; ∆f=75kHz − 0.1 0.35 %

α

cs

T

amb

Note

1. IC is operating; specified parameters may deviate from limits which are valid for operating range.

analog supply voltage 1 (+5 V; pin 5) note 1 4.5 5.0 5.5 V

operating range 4.75 5.0 5.25 V

analog supply current 1 (pin 5) FM mode 18 21 25 mA

AM mode 14 17 21 mA total FM mixer output current 4.8 6.0 7.2 mA total AM mixer output current 10 12 14 mA analog supply voltage 2 (pin 28) note 1 7 8.5 10 V

operating range 8.1 8.5 8.9 V analog supply current 2 (pin 28) FM mode 2.4 3.0 3.6 mA analog supply voltage 3 (+8.5 V; pin 56) note 1 7 8.5 10 V

operating range 8.1 8.5 8.9 V analog supply current 3 (pin 56) FM mode 19 24 28 mA

AM mode 9.5 12 15 mA digital supply voltage 1 (+5 V; pin 5) note 1 4.5 5.0 5.5 V

operating range 4.75 5.0 5.25 V digital supply current (pin 52) note 1 8 10 12 mA signal-plus-noise-to-noise ratio ∆FM mode;

66 75 − dB f = 22.5 kHz at pins 43 and 47

AM mode; m = 0.3 54 60 − dB

AM mode − 1.5 3 %

channel separation (adjusted) 40 −−dB operating ambient temperature −40 − +85 °C

1995 Nov 22 3

Philips Semiconductors Preliminary speciﬁcation

In Car Entertainment (ICE) car radio TEA6822T

BLOCK DIAGRAM

DDA

, full pagewidth

220 kΩ

10 nF

RDS

ref

V

TOKO

392AC-1747Z = S

ref

V

SFP450

68 pF

3.3 nF

33 kΩ

100 kΩ

AMSTOP

L13

LEVELADJ

100 kΩ

FMSTOP

1.5 nF

TOKO

7PSM6-194D = S

22 nF220 nF

82 kΩ

220 nF

62 pF

R40 R51

R39

100 kΩ

TR5

27 kΩ

100 kΩ

82 kΩ

V

i.c.

R41

33 kΩ

68 µF

100 nF

100

CC1

25

46

45

47

43 48

39 2

4.3 kΩ

1

42 38

nF

34

33

22 23

SFE10.7

10.7 MHz

VCO

PHASE

LOW

PASS

SOFT

MPX

AFC

FM-LIMITER

AM/FM

373635

330 Ω

LOGIC

BLOCK

PHASE

DIGITAL

DETECTOR

FILTER

MUTE

BUFFER

AM

DELOG

LEVEL

DETECTOR

AM-AMPLIFIER

SWITCH

AM

27

24

100 nF

10.7 MHz

820 kΩ

38 kHz

19 kHz

ref

f

PILOT

PASS

HIGH

AMPLIFIER

LEVEL

:N5

IF-

:2/:6

22 nF

6.8 nF

100 nF

31

26

DETECTOR

CANCELLER

TEA6822T

60 kHz

AMPLIFIER

29

28

100 nF

10.7 MHz

radio

mute

AVERAGE

19

10.7 MHz

OUTRIGHT

44

-

+

MPX-

DETECTOR

20 kHz

FM

13

20

56 pF

72.2 MHz

470 nF

30

int1

V

+

DECODER

tuning

mute

PEAK

DETECTOR

BUFFER

14

10

41

+

MATRIX

nF

OUTLEFT

6.8 nF

-

radio

mute

mono

AVERAGE

DETECTOR

ADC

PATH

MULTI-

ADC

LEVEL

OSCILLATOR

9

8

61.5 MHz PHILIPS

9922 521 00098

DDA3

V

+8.5 V

10 Ω

100

56

32

PULSE

FORMER

HIGH

PASS

FILTER

PEAK

DETECTOR

IF-

COUNTER

FREQUENCY

REFERENCE

11

10

ref

f

or Daiwa AT - 49

33 µF

nF

470 nF

4

SUPPLY

int2

int1

V

DETECTOR

INTERFERENCE

SWITCH

CURRENT

AM

C-BUS

2

I

6

7

10 kΩ

SCL

SDA

CCA

+5 V

V

10 Ω

33 µF

nF

NOISE

int2

V

TK

COMPEN-

100 nF

100

5

52 21

51

DETECTOR

17 18 15

16

3

50 49

SATION

40

55

53

54

33 µF

DDD

V

12 kΩ

1 MΩ

3.3 MΩ

10 kΩ

+5 V

120 kΩ

12

-

+

10 kΩ

MHA253

10 Ω

DDD

+5 V

V

ref

V

100 nF

33 kΩ

1.2 MΩ

100 nF

2.2 MΩ

nF

100

100 nF

10 kΩ

220 nF

level

220 nF

SDASCL

Fig.1 Block diagram.

1995 Nov 22 4

Philips Semiconductors Preliminary speciﬁcation

In Car Entertainment (ICE) car radio TEA6822T

PINNING

SYMBOL PIN DESCRIPTION

QDET1 1 demodulator tank 1 QDET2 2 demodulator tank 2 TSWITCH 3 time switch AGND 4 analog ground V

DDA1

5 analog supply voltage 1 (+5 V) HFBUS1 6 HF bus 1; pull-up to 5 V HFBUS2 7 HF bus 2; pull-up to 5 V XTAL1 8 crystal oscillator1 XTAL2 9 crystal oscillator2 f

ref1

10 PLL reference output

frequency 1

f

ref2

11 PLL reference output

frequency 2

I

ref

12 reference current FMIF1IN1 13 72 MHz FM-IF input 1 FMIF1IN2 14 72 MHz FM-IF input 2 TSDR 15 time constant for SDR TSDS 16 time constant for SDS V V

SDS SDR

17 SDS control voltage

18 SDR control voltage FMIF2OUT1 19 FM mixer output 1 FMIF2OUT2 20 FM mixer output 2 V

ref

21 reference voltage AMIF2OUT1 22 AM mixer output 1 AMIF2OUT2 23 AM mixer output 2 FMAMDEC 24 FM/AM 10.7 MHz decoupling PHASEDET 25 phase detector PILDET 26 pilot detector FMAM10.7 27 FM/AM 10.7 MHz input V

DDA2

28 analog supply voltage 2

SYMBOL PIN DESCRIPTION

FMIFAMPOUT 29 FM-IF ampliﬁer output AFGND 30 AF ground DEEMPHR 31 de-emphasis capacitor right DEEMPHL 32 de-emphasis capacitor left AMIF2IN1 33 AM-IF2 input 1 AMIF2IN2 34 AM-IF2 input 2 FMIN2 35 FM limiter input DCFEED 36 DC feed FM limiter FMIN1 37 FM limiter input LEVELADJ 38 level adjustment C

AFC

39 AFC capacitor MPBUF 40 multi-path buffer time constant OUTLEFT 41 AF output left FMSTOP 42 FMSTOP adjustment RDS/AMSTOP 43 MPX for RDS/AMSTOP

adjustment OUTRIGHT 44 AF output right MPXIN 45 stereo decoder MPX input i.c. 46 internally connected MPXOUT 47 FM demodulator MPX output AMAFOUT 48 AM demodulator AF output V

mute/AML

49 mute voltage/AM level LEVELUNWEIG 50 level unweighted IAC V

DDD

CONTR

51 IAC control voltage

52 digital supply voltage SDA 53 SDA; pull-up to 5 V SCL 54 SCL; pull-up to 5 V DGND 55 digital ground V

DDA3

56 analog supply voltage 3 (8.5 V)

1995 Nov 22 5

Philips Semiconductors Preliminary speciﬁcation

In Car Entertainment (ICE) car radio TEA6822T

FUNCTIONAL DESCRIPTION Stereo decoder

By changing the value of the input resistor at pin 12 the

handbook, halfpage

TSWITCH

HFBUS1 HFBUS2

FMIF1IN1 FMIF1IN2

FMIF2OUT1 FMIF2OUT2

AMIF2OUT1 AMIF2OUT2

FMAMDEC

PHASEDET

FMAM10.7

QDET1 QDET2

AGND

V

DDA1

XTAL1 XTAL2

f

ref1

f

ref2

I

ref

TSDR

TSDS

V

SDS

V

SDR

V

ref

PILDET

V

DDA2

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

TEA6822T

MHA204

56

V

DDA3

55

DGND

54

SCL

53

SDA

52

V

DDD

51

IAC

50

LEVELUNWEIG

49

V

mute/AML

48

AMAFOUT

47

MPXOUT

46

i.c.

45

MPXIN

44

OUTRIGHT

43

RDS/AMSTOP

42

FMSTOP

41

OUTLEFT

40

MPBUF

39

C

AFC

38

LEVELADJ

37

FMIN1

36

DCFEED

35

FMIN2

34

AMIF2IN2

33

AMIF2IN1

32

DEEMPHL

31

DEEMPHR

30

AFGND

29

FMIFAMPOUT

CONTR

MPX input can be adapted to the level of the FM demodulator output (see Fig.15).

A 3rd order low-pass filter f

= 90 kHz at the MPX input

g

provides extra 190 kHz ACI suppression. For AM the VCO is switched off. Interference gate at MPX

demodulator outputs.

Fig.2 Pin configuration.

1995 Nov 22 6