TDA7786 datasheet(37/54 Pages) STMICROELECTRONICS

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TDA7786, TDA7786M

Electrical specifications

3.5.2

AM MW overall system performance

Antenna level equivalence: 0 dBµV = 1 µVrms

Figure 20. AM MW input set-up

Level referred to SG EMF output before antenna dummy; dummy antenna load as shown

above Frf = 999 kHz (1000 kHz for US), Vrf =74 dBµV, mod = 30 %, faudio =400 Hz, unless

otherwise specified.

Table 27. AM MW overall system performance

Parameter

Test condition

Min

Typ

Max

Units

Tuning range MW Eu/Jp

(can be modified by the user)

531

1629

kHz

Tuning step MW Eu/Jp

(can be modified by the user)

kHz

Tuning range MW US

(can be modified by the user)

530

1710

kHz

Tuning step MW US

(can be modified by the user)

kHz

Sensitivity

S/N = 20 dB

dBµV

Ultimate S/N

@ 80 dBµV

AGC F.O.M.

Ref.=74 dBµV

-10dB drop point

(1)

Distortion

M=80%

0.1

0.2

Adjacent channel selectivity

∆F = 9 kHz, SINAD = 26 dB

undesired M = 30 % 1 kHz

Alternate channel selectivity

∆F = 18 kHz, SINAD = 26 dB

undesired M = 30 % 1 kHz

Strong signal interferer (1)

SNR

∆F = ±40 kHz

desired = 40 dBµV

undesired = 110 dBµV,

m = 30 % 1 kHz

812

Strong signal interferer (1)

suppression

∆F = ±40 kHz

desired = 40 dBµV

undesired = 110 dBµV,

m = 30 % 1 kHz

-10

Strong signal interferer (1)

cross-modulation

∆F = ±40 kHz

desired = 80 dBµV

undesired = 110 dBµV,

m = 30 % 1 kHz

maximum SNR of undesired

channel

-1

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