TDA9840 datasheet(9/28 Pages) PHILIPS

9 / 28 page

1998 Jul 03

Philips Semiconductors

Product speciﬁcation

TV and VTR stereo/dual sound processor

with digital identiﬁcation and I2C-bus control

TDA9840

CHARACTERISTICS

VP =5V; Tamb = +25 °C; nominal input signal Vi1,2 = 0.25 V RMS value (FM: 54% modulation is equivalent to

∆f= ±27 kHz); nominal input signal Vi3,4 = 0.5 V RMS value (AM: m = 0.54); nominal output signal Vo1,2,3,4 = 0.5 V

RMS value; fAF = 1 kHz; Vi pil = 16 mV RMS value; fpil = 54.6875 kHz (identiﬁcation frequencies: stereo = 117.48 Hz,

dual = 274.12 Hz), 50

µs pre-emphasis; noise measurement in accordance with “CCIR468-3”, working oscillator

frequency fω = 10.008 MHz; currents into the IC positive; measured in test circuit according to Fig.5; unless otherwise

speciﬁed.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Supply

supply voltage (pin 18)

4.5

8.8

supply current (pin 18)

15.5

16.5

20.5

Ptot

total power dissipation

69.75

82.5

180.4

Vn(DC)

DC voltage

(pins 7 to 15 and 17)

⁄2VP − 0.1

⁄2VP

⁄2VP + 0.1 V

Vref(DC)

DC reference voltage (pin 6)

⁄2VP − 0.1

⁄2VP

⁄2VP + 0.1 V

lL(DC)

DC leakage current (pin 6)

−−

±1

µA

AF Inputs; Vi1 and Vi2 (pins 7 and 8)

Vi(rms)

nominal input signal voltage

(RMS value)

54% modulation

−

0.25

−

Vi(rms)

clipping voltage level

(RMS value)

THD

≤ 1.5%; note 1

VP = 5 V

0.625

0.715

−

VP = 8 V

1.050

1.200

−

THD

≤ 1.5%; note 2

VP = 5 V

0.780

0.900

−

VP = 8 V

1.300

1.500

−

AF signal voltage gain

G = Vo/Vi; note 3

∆G

v (Vo1)

stereo control range

only at pin 7

+2.4

+2.5

+2.6

−2.3

−2.4

−2.5

nominal step

maximum 49 steps

−

0.1

−

∆G

v (Vo2)

level control range

only at pin 8

+2.4

+2.5

+2.6

−1.9

−2.0

−2.1

nominal step

maximum 9 steps

−

0.5

−

input resistance

Ω

Rdeem

internal de-emphasis resistor

(pins 15 and 17)

see Fig.4

4.25

5.0

5.75

Ω

Additional AF input pin (pins 9 and 10)

Vi(rms)

nominal input signal voltage

(RMS value)

54% modulation

−

0.5

−

Vi(rms)

clipping voltage level

(RMS value)

THD

≤ 1.5%

VP = 5 V

1.25

1.40

−

VP =8V

2.10

2.35

−

AF signal voltage gain

G=Vo/Vi; note 3

−10

input resistance

Ω

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