TDA7705 datasheet(34/42 Pages) STMICROELECTRONICS

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Weak signal processing

TDA7705

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Doc ID 15938 Rev 9

5.1.3

Adjacent channel mute

5.1.4

Stereo blend-

Table 28.

Adjacent channel mute

(continuous set)

Symbol

Parameter

Test condition

Min

Typ

Max

Units

ACMd

Depth

SMd

Table 29.

Stereo blend

(continuous set)

Symbol

Parameter

Test condition

Min

Typ

Max

Units

MaxSep

Maximum stereo separation

field strength = 80 dBµV, pilot

deviation = 6.75 kHz

040

SBFSsp

Start point vs. field strength

separation = MaxSep - 1 dB

no multipath present

dBµV

SBFSep

End point vs. field strength

separation = 1 dB

no multipath present

dBµV

SBFStM2S

Field strength-related

transition time from mono to

stereo

Vrf step-like variation from

20 dBµV to 80 dBµV

0.001

SBFStS2M

Field strength-related

transition time from stereo to

mono

Vrf step-like variation from

80 dBµV to 20 dBµV

0.001

0.5

SBMPsp

Start point vs. multipath

separation = MaxSep - 1 dB

equivalent 19 kHz AM

modulation depth;

field strength = 80 dBµV

510

SBMPep

End point vs. multipath

separation = 1 dB

equivalent 19 kHz AM

modulation depth;

field strength = 80 dBµV

530

SBMPtM2S

Multipath -related transition

time from mono to stereo

Vrf step-like variation from

20 dBµV to 80 dBµV

0.001

SBMPtS2M

Multipath -related transition

time from stereo to mono

Vrf step-like variation from

80 dBµV to 20 dBµV

0.001

Pil ThrM2S

Pilot detector stereo threshold

Threshold on pilot tone

deviation for mono-stereo

transition

0.8

2.74

kHz

Pil ThrHyst

Pilot detector threshold

hysteresis

Difference in pil. det.

deviation threshold for stereo

to mono transition compared

to PilThrM2S

0.01

kHz

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