E-TDA7421N Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

E-TDA7421N

AM/FM tuner for car radio and Hi-Fi applications

STMicroelectronics 

TDA7421N

Electrical specifications

3.4

AM section global performances

Table 6.

AM section global performances

Refer to evaluation circuit.

Input: fc = 999 kHz, f mod = 400 Hz, m = 30 %, 74 dB μVemf antenna level unless otherwise

specified.

Audio output + RC BPF (BPF 20 Hz - 20 kHz)

Symbol

Parameter

Test condition

Min. Typ. Max. Unit

ΔMICC

Total supply current including

mixers

80

mA

VIN MIN Maximum sensitivity

ΔVAF = - 20 dB

13

dBμV

(emf)

VIN US Usable sensitivity

S+N/N = 20 dB

27

dBμV

(emf)

ΔVis

AGC range

ΔVAF = -10 dB

50

dB

S+N/N Signal to noise ratio

VINRF = 74 dBu

54

dB

αIMAG Image rejection

fim = 22.399 MHz, antenna level

@ VΔF = -10 dB

dB

αTw

Tweet, Δ(S+N/N)

f1 = 900 kHz; f2 = 1350 kHz

1.2

dB

0.3

%

THD Total harmonic distortion

m = 80 %

1

%

VAF

VAMST

Audio output level

AM IF2 output level

VINRF = 120 dBμVemf

0.3

%

107

mVRM

S

105

dBμV

3.5

Electrical characteristics

Table 7. Electrical characteristics

Symbol

Parameter

Test condition

Min. Typ. Max. Unit

DC parameters (Tamb = 25 °C; VCC = 8 V, Vdd = 5 V, no RF input unless otherwise specified)

PLL VCC PLL supply voltage

PLL ICC PLL supply current

AM mode

FM mode

7.5

10

V

1.6

mA

3.0

mA

DIG Vdd Digital supply voltage

DIG Idd Digital supply current

AM mode

FM mode

4.75

5.25

V

4.6

mA

4.0

mA

RF VCC RF supply voltage

RF ICC RF supply current

AM mode

FM mode

7.5

10

V

27.0

mA

13.0

mA

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