TDA7514 データシートの表示（PDF） - STMicroelectronics

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TDA7514

SINGLE-CHIP FM/AM TUNER WITH STEREO DECODER AND AUDIO PROCESSOR

STMicroelectronics 

TDA7514

3.4 STEREODECODER

Standard Conditions, unless otherwise indicated:

FM: Input at #TUNER_IN = 1 kHz at 450 mVrms, Input Gain setting = 0.5 dB, Deemphasis = 75 µs, Roll

Off Compensation set to give maximum stereo separation (note that this varies with VSBL setting)

AM: Input at #TUNER_IN = 1 kHz at 1 Vrms, Input Gain setting = 0.5 dB

Table 6.

Symbol

Parameter

Test Condition

VIN

MPX Input Level

Input Gain = 3.5dB

Rin

Input Resistance (TUNERIN) FM

AM

Gain

Minimum Input Gain

Gmax Maximum Input Gain

GSTEP

Step Resolution

a

Max Channel Separation

SVRR

Supply Voltage Ripple

Rejection

Vripple=100mV, f=1kHz

THD

Total Harmonic Distortion

fin=1kHz, mono

S+N

N

Signal plus Noise to Noise

Ratio

A-weighted, S=2Vrms

MONO/STEREO SWITCH (With InGain=5.75dB)

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

∆f/f

Capture Range

DEEMPHASIS & HIGHCUT

τDeempFM

Deemphasis Time Constants

FM; VLEVEL >> VHCH

Deemphasis=50µs, FM

Deemphasis=75µs, FM

τDeempAM

Deemphasis Time Constants

AM; VLEVEL >> VHCH

Deemphasis=50µs, AM

Deemphasis=75µs, AM

REF5V Internal Reference Voltage

Carrier and Harmonic suppresion at output

α19

Pilot Signal

f=19kHz, Deemphasis=75µs

α38

Subcarrier

f=38kHz, Deemphasis=75µs

α57

Subcarrier

f=57kHz, Deemphasis=75µs

α76

Subcarrier

f=76kHz, Deemphasis=75µs

Intermodulation

α2

fmod=10kHz, fspur=1kHz

α3

fmod=13kHz, fspur=1kHz

Traffic Radio

α57

Signal

f = 57kHz

SCA – Subsidiary Communication Authorization

α67

Signal

f = 67kHz

ACI – Adjacent Channel Interference

α114

Signal

f = 114kHz

α190

Signal

f = 190kHz

Min.

70

30

35

80

10

15

7

10

0.5

25

50

4.7

40

Typ.

0.5

100

30

0.5

5.75

1.75

50

55

Max.

1.25

130

0.02 0.3

91

15

25

25

35

12

17

19

25

50

75

75

100

22.3

14.9

5

5.3

50

75

62

90

65

75

70

75

95

84

Unit

VRMS

kΩ

kΩ

dB

dB

dB

dB

dB

%

dB

mV

mV

mV

mV

%

µs

µs

kHz

kHz

V

dB

dB

dB

dB

dB

dB

dB

dB

dB

dB

17/74

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