TDA7540B datasheet(14/75 Pages) STMICROELECTRONICS

14 / 75 page

Electrical specifications

TDA7540B

14/75

3.2.3

AM section

Table 6.

Electrical Characteristics

(Tamb = 25°C, VCC1 = VCC2 = VCC3 = VCCST= VCCVCO = VCCMIX1 = VCCMIX2 = VCCIF1 = 8.5V,

fRF = 98MHz, m= 30%, fMOD = 400kHz, fXtal = 10.25MHz, in application circuit, unless

otherwise specified).

Item

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Global

17.1

VANT_us

Usable sensitivity

(S+N)/N = 26 dB

µV

17.2

∆V

ANT

IF2 AGC Range

Ref.: VINRF = 60dBµV,

17.3

(S+N)/N

Signal to Noise Ratio

Ref.: VINRF = 60dBµV50

17.4

aIF

IF rejection

Ref: VINRF = 60dBµV,

IF = 10.7MHz

17.5

fAF

Frequency response

Ref.: VINRF = 60dBµV,

∆VAF = -3 dB

3.6

kHz

17.6

THD

Total Harmonic Distortion

VINRF = 60dBµV, m = 0.8

m = 0.3

VINRF = 120 dBµV, m = 0.8

m = 0.3

0.5

0.3

1.0

0.3

17.7

V53

AF output level

VINRF = 60dBµV

190

mVRMS

17.8

V24

IF output level

VINRF = 60dBµ, m=off

190

mVRMS

17.9

Min. RF AGC threshold

Max. RF AGC threshold

WAGC

109

µV

17.10

V71

Min. IF AGC threshold

Max. IF AGC threshold

WAGC

109

µV

17.11

V71

Min. DAGC threshold

Max. DAGC threshold

DAGC

µV

17.12

|I78max|

AGC2 charge current

seek

160

µA

17.13

CCR

Charge current ratio

seek/seek off

AGC Voltage Driver Output

18.1

Max. AGC output voltage

3.5

18.2

Min. AGC output voltage

0.5

18.3

| I6 |

AGC current

100

µA

AGC PIN Diode Driver Output

19.1

AGC driver current

-2

AM Mixer1 (10.7MHz)

20.1

RIN

Input resistance

differential

100

Ω

20.2

CIN

Input capacitance

differential

20.3

ROUT

Output impedance

differential

100

Ω

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