TDA7541WTR datasheet(19/76 Pages) STMICROELECTRONICS

19 / 76 page

TDA7541

Electrical specifications and characteristics

19/76

23.9

V23

IF2 output voltage

V56 = 90dBµ, m=off

140

190

240

mVRMS

24. AMAGC2

24.1

VAGC(start) AGC start voltage (PIN47) Input carrier voltage

dBµV

24.2

ΔAGC AGC2 range

Between start of AGC2

and the intervention point

of prestage AGC

24.3

gAGC

Control slope

Seek mode

µA/V

24.4

gAGC

Control slope

normal mode

µA/V

24.5

II57I

Max. AGC charge current

Seek mode

125

μA

24.6

II57I

Max. AGC charge current

normal mode

μA

24.7

V57

Max. AGC output voltage

V47 = 100dBµ

4.6

4.8

24.8

V57

Min. AGC output voltage

V47 = 20dBµ

0.2

0.5

25. AM audio output

25.1

V43

Audio output voltage

V56 = 90dBµ, m = 30%,

fmod = 1KHz

170

200

230

mVRMS

25.2

THD

Total harmonic distortion

V56 = 90dBµ, m = 30%,

fmod = 1KHz

0.3

0.5

25.3

V56 = 90dBµ, m = 80%,

fmod = 1KHz

0.5

0.9

25.4

ROUT

Output impedance

26. IF noise blanking

26.1

tbl

Min. blanking time

μs

26.2

tbl

Max. blanking time

μs

26.3

Vth

Min internal threshold

26.4

Vth

Max. internal threshold

187.5

26.5

Vthstep

Threshold step

12.5

Can be reached in application circuit, not measured.

Table 7.

AM section (continued)

(Tamb = 25°C, VCC1 = VCC2 = VCCMIX1 = VCCVCO = VCCIF = 8.5V, fXtal = 10.25 MHz, fRF = 1

MHz, m = 30%, fmod = 1 kHz, in application circuit, unless otherwise specified)

Item

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

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