TDA7405 datasheet(25/56 Pages) STMICROELECTRONICS

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TDA7405

Notes to the Characteristics

Note 1. Intermodulation Suppression

measured with: 91% pilot signal; fm = 10 kHz or 13 kHz.

Note 2. Traffic Radio (V.F.) Suppression

measured with: 91% stereo signal; 9% pilot signal; fm=1kHz; 5% subcarrier (f=57kHz, fm=23Hz AM, m=60%)

Note 3. SCA ( Subsidiary Communications Authorization )

measured with: 81% mono signal; 9% pilot signal; fm=1kHz; 10%SCA - subcarrier ( fs = 67kHz, unmodulated ).

Intermodulation (Note 1)

α2fmod=10kHz, fspur=1kHz

α3fmod=13kHz, fspur=1kHz

Traffic Radio (Note 2)

α57

Signal f=57kHz

SCA - Subsidiary Communications Authorization (Note 3)

α67

Signal f=67kHz

ACI - Adjacent Channel Interference (Note 4)

α114

Signal f=114kHz

α190

Signal f=190kHz

Table 3. ELECTRICAL CHARACTERISTICS (continued)

VS = 9V, deemphasis time constant = 50µs, MPX input voltage VMPX = 500mV (75kHz deviation),

modulation frequency = 1kHz, input gain = 6dB, Tamb = 27°C, unless otherwise specified.

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

α2

o s i gna l

() at1kHz

()

o s pur io u s

() at1kHz

()

---------------------------------------------------------------- ƒ

;

210kHz

⋅

() 19kHz

–

α3

o s i gna l

() at1kHz

()

o s pur io u s

() at1kHz

()

---------------------------------------------------------------- ƒ

;

313kHz

⋅

() 38kHz

–

α57 V.W.F.

()

o s ign al

() at1kHz

()

o s p uri ous

() at1kHz±23kHz

()

-------------------------------------------------------------------------------------

α67

o s i gn al

() at1kHz

()

o sp u r io u s

() at9kHz

()

---------------------------------------------------------------- ƒ

;

338kHz

⋅

() 67kHz

–

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