TDA7541 datasheet(23/76 Pages) STMICROELECTRONICS

23 / 76 page

TDA7541

Electrical specifications and characteristics

23/76

37.21

VADJMP

Noise rectifier adjustment

by strong multipath

influence

Signal PEAK in testmode,

VMPTC=1V, NBSMP=1,

NBMP=0, NBRR=01

37.22

VADJMP

Noise rectifier adjustment

by multipath and strong

multipath influence

Signal PEAK in testmode,

VMPTC=1V, MBSMP=1,

NBMP=1, NBRR=01

5.2

V/ms

38. Multipath detector

38.1

GMP

Min. multipath gain

MPG = 00

38.2

GMP

Max. multipath gain

MPG = 11

38.3

GRECTMP Min. rectifier gain

MPRG = 01

-1

38.4

GRECTMP Max. rectifier gain

MPRG = 11

7.6

38.5

ICHMP

Rectifier charge current

MPCC = 0

0.5

0.8

1.1

μA

38.6

ICHMP

Rectifier charge current

MPCC = 1

0.2

0.4

0.7

μA

38.7

IDISMP

Rectifier discharge current

0.5

39. Quality detector

39.1

Min. quality detector

coefficient

QDC

0.5

0.6

0.7

39.2

Max. quality detector

coefficient

QDC

0.9

1.05

1.2

39.3

Min. quality noise gain

QNG

39.4

Max. quality noise gain

QNG

Intermodulation suppression

measured with: 91% stereo signal; 9% pilot signal; fm = 10kHz or 13kHz.

Traffic radio (V.F.) suppression

measured with: 91% stereo signal; 9% pilot signal; fm=1kHz; 5% sub carrier (f=57kHz, fm=23Hz AM, m=60%)

Table 8.

Stereo decoder section (continued)

(Tamb=25°C, VCC1=VCC2=VCCMIX1=VCCVCO=VCCIF=8.5V, fXtal = 10.25 MHz,

VMPX=500mVrms mono, f=1kHz, deemphasis τ=50µs, in application circuit, unless otherwise

specified)

Item

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

o signa l @ 1 k Hz

()

o spuriou s @1 kHz

()

------------------------------------------------------------- ƒs

10kHz

() 19kHz

–

()

;

o signa l @ 1 k Hz

()

o spuriou s @1 kHz

()

------------------------------------------------------------- ƒs

13kHz

() 38kHz

–

()

;

a57 V W F

()

o sign al @ 1 kHz

()

o sp urio us @1 kHz

() 23kHz

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