TDA7402 datasheet(32/71 Pages) STMICROELECTRONICS

32 / 71 page

Stereo decoder part

TDA7402

32/71

Stereo decoder part

5.1

Features:

●

No external components necessary

●

PLL with adjustment free, fully integrated VCO

●

Automatic pilot dependent MONO/STEREO switching

●

Very high suppression of intermodulation and interference

●

Programmable roll off compensation

●

Dedicated RDS-softmute

●

Highcut and stereo blend-characterisctics programmable in a wide range

●

FM/AM noiseblanker with several threshold controls

●

Multipath-detector with programmable internal/external influence

●

I2C-bus control of all necessary functions

5.2

Electrical characteristics

VS = 9V, de-emphasis time constant = 50µs, MPX input voltage VMPX = 500mV (75kHz

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

specified.

Table 7.

Electrical characteristics

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

Vin

MPX input level

Input gain = 3.5dB

0.5

1.25

Vrms

Rin

Input resistance

100

130

Gmin

Min. input gain

1.5

3.5

4.5

Gmax

Max. input gain

8.5

12.5

Gstep

Step resolution

1.75

2.5

3.25

SVRR

Supply voltage ripple rejection

Vripple = 100mV, f = 1kHz

Max. channel separation

THD

Total harmonic distortion

fin=1kHz, mono

0.02

0.3

Signal plus noise to noise ratio

A-weighted, S = 2Vrms

Mono/Stereo-switch

VPTHST1

Pilot threshold voltage

for stereo, PTH = 1

VPTHST0

Pilot threshold voltage

for stereo, PTH = 0

VPTHMO1 Pilot threshold voltage

for mono, PTH = 1

VPTHMO0 Pilot threshold voltage

for mono, PTH = 0

PLL

Δf/f

Capture range

0.5

S+ N

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