TDA7703R

Electrical specifications

Rev 1.2

21/32

3.5.3

AM LW overall system performance

Antenna level equivalence: 0dBµV = 1µVrms

Figure 8.

AM LW input set-up

Level referred to SG output before antenna dummy (Vrf, node 'A'); capacitive dummy

15pF+68pF; FM input not connected. Frf = 216 kHz, Vrf =74 dBµV, mod = 30 %, faudio = 400

Hz, unless otherwise specified.

Table 15.

AM LW overall system performance

Parameter

Test condition

Min

Typ

Max

Units

Tuning range LW

(can be modified by the user)

144

288

kHz

Tuning step LW

(can be modified by the user)

1

kHz

Sensitivity

S/N =20dB

31

34

dBµV

Ultimate S/N

@ 80 dBµV

63

66

dB

AGC F.O.M.

Ref.=74 dBµV

-10dB drop point

50

62

65

dB

Distortion

m = 80 %

0.1

%

Image rejection

80

dB

PCB

UNDER

TEST

30

Ω

Vrf + 6dB

Vrf

50

Ω

50

Ω

15pF

68pF

A