TEA6820T Просмотр технического описания (PDF) - Philips Electronics

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TEA6820T

In Car Entertainment (ICE) car radio

Philips Electronics 

Philips Semiconductors

In Car Entertainment (ICE) car radio

Preliminary specification

TEA6820T; TEA6822T

SYMBOL

PARAMETER

CONDITIONS

MIN. TYP. MAX. UNIT

Muting functions (mute via I2C-bus)

∆V44, ∆V41

DC offset voltage

αmute

tune mute

radio mute (in combination with

tune mute)

tune mute

radio mute (in combination

with tune mute)

−50 −

−400 −

60

−

80

−

+50 mV

+400 mV

−

dB

−

dB

High-cut control; see Fig.18

V18 − 0.765V21 control voltage

tde-emph

control range of de-emphasis

Voltage controlled oscillator; note 4

fosc

oscillator frequency range

Noise blanker

note 3

tde-emph = 50 µs

tde-emph = 80 µs

0

−

−300 −

50

−

−

mV

−

mV

80

µs

225 228 231 kHz

INTERFERENCE DETECTION FULLY INTERNAL FROM LEVEL DETECTOR

tsup

interference suppression time

40

50

−

µs

TRIGGER THRESHOLD CONTROL

I51 charge

I51 discharge

charge current (into +4 V)

discharge current (from +8.5 V)

−

45

−

µA

−

−900 −

µA

TRIGGER SENSITIVITY MEASUREMENT WITH PULSED MODULATION OF FM-IF2; see Figs 19 and 20

V37-35(p)

V51

∆V51

Ioffset

trigger sensitivity for test signal 1 V38 = 2.52 V; note 5

(peak value)

V38 = 2.52 V; note 6

−

−

100 −

0.8 mV

−

mV

trigger sensitivity for test signal 2 V38 = 2.52 V; note 6

(peak value)

V38 = 2.52 V; note 6

5.0 −

−

mV

100 −

−

mV

trigger threshold variation with

V37-35 = 100 mV; ∆f = 0 kHz −

6.4 −

V

frequency modulation of FM-IF2 V37-35 = 100 mV; ∆f = 75 kHz −

520 −

mV

and fmod = 15 kHz (pin 51)

gate input offset current at pins 31

−

20

50

nA

and 32 during suppression pulse

duration

1997 Feb 12

15

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