TDA7541 datasheet(13/76 Pages) STMICROELECTRONICS

13 / 76 page

TDA7541

Electrical specifications and characteristics

13/76

10.8

Gmax

Max. gain

IFG

10.9

INOISE

Equivalent input noise

voltage

Gmax , Rgen=330Ω, RL=330Ω,

noise of Rgen not included

3.2

nV/

√Hz

10.10

CP1dB

1dB compression point

referred to 330Ω input, Gmax

dBµV

10.11

IIP3

3rd order Intermodulation

referred to 330Ω input, Gmax

130

dBµV

11. Mixer2 (450kHz)

11.1

RIN

Input resistance

Differential

240

300

360

11.2

CIN

Input capacitance

2.5

11.3

V55.56

DC input voltage

3.7

4.3

11.4

ROUT

Output resistance

100

11.5

COUT

Output capacitance

2.5

11.6

V52,53

DC output voltage

3.7

4.3

11.7

Conversion

transconductance

WB Mode; referred to MIX2OUT

126

µA/V

11.8

Gain

FM Mode, referred to MIX2OUT

11.9

Cstep

Min. cap. Step

IF2A

2.2

11.10

Cmax

Max. cap.

IF2A

11.11

INOISE

Equivalent input noise

voltage,

including buffer mixer2

Rgen=330Ω, IF2Q”10”

noise of Rgen not included

nV/

√Hz

11.12

CP1dB

1dB compression point

referred to 330

Ω input ,IF2Q”10”

116

μV

11.13

IIP3

3rd order Intermodulation

referred to 330

Ω input ,IF2Q”10”

132

μV

12. Demodulator, audio output

12.1

THD

Total harmonic distortion

Dev.= 75kHz, V56=

100dBµV,IF2Q”11”

0.1

0.3

aAM

AM suppression

V56 =100dBµ, Δf=40KHz, fmod

=1KHz,

fmod =1KHz@AM, m=0.3%

12.2

VMPX

MPX output signal

Dev.= 75kHz

440

500

560

mVRMS

12.3

ROUT

Output impedance

RLOAD

Load resistance

12.4

(S+N)/N

Signal plus noise-to-noise

ratio at MPXOUT

Δf=40KHz, f

mod =1KHz, V56

=100dBµV,

Deemphasis=50µs,

B=200Hz to 15KHz

ISSENA = 0

Table 6.

FM section (continued)

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

fRF = 98MHz, dev = 40 kHz, fMod = 1 kHz, in application circuit, unless otherwise specified)

Item

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

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