TDA8745H datasheet(22/40 Pages) PHILIPS

22 / 40 page

1996 Mar 11

Philips Semiconductors

Preliminary speciﬁcation

Satellite sound receiver with I2C-bus control

TDA8745

PLL FM demodulators

fCCO

free-running frequency

PLL left; BB = 0

−

10.6

−

MHz

PLL right; BB = 0

−

10.6

−

MHz

PLL left; BB = 1

−

6.9

−

MHz

PLL right; BB = 1

−

6.9

−

MHz

∆f

CCO

lock range of PLLs

BB = 0; note 7

−

11.5

MHz

BB = 1; note 7

5.50

−

8.50

MHz

VOL; VOR

PLL output voltage (pins 23 and 22)

NR = off; DEEM = ﬂat;

BB = 0

−−5.6

−

dBV

NR = off; DEEM = ﬂat;

BB = 1; note 8

−−7.3

−

dBV

∆VOL; ∆VOR

spread of PLL output voltage over

lock range (pins 23 and 22)

NR = off; DEEM = ﬂat;

BB = 1; note 8

−−±1.5

Noise reduction

low-pass ﬁlter 50 kHz response

with respect to 1 kHz

note 9

−21

−16

−11

Vo 23,22

output voltage (pins 23 and 22)

at 0 dB NR input level;

∆fS1 = ∆fS2 = 50 kHz;

DEEM = ﬂat; note 10

−1

+1+3dBV

−20 dB NR input level;

∆f

S1 = ∆fS2 = 5 kHz;

DEEM = ﬂat

−29

−26

−23

dBV

15 kHz frequency response

with respect to 1 kHz

at 0 dB NR input level;

∆f

S1 = ∆fS2 = 50 kHz;

DEEM = ﬂat

−2

−20 dB NR input level;

∆f

S1 = ∆fS2 = 5 kHz;

DEEM = ﬂat

−13

−11.5 −10

Voffset(DC)

DC offset voltage on attack/recovery

capacitors (pins 38 and 26)

∆f = 0 kHz; all PLLs locked 14

−

De-emphasis

15 kHz frequency response

with respect to 1 kHz ﬂat

NR = off; DEEM = ﬂat

−0.5

0.0

+0.5

NR = off; DEEM = J17;

note 11

−13.9 −12.4 −10.9 dB

NR = off; DEEM = 50

µs

−15.2 −13.7 −12.2 dB

NR = off; DEEM = 75

µs

−18.6 −17.1 −15.6 dB

output resistance (pins 34 and 30)

100

125

150

Ω

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

37,27 (50 kHz)

37,27 (1 kHz)

---------------------------------

23,22 (15 kHz)

23,22 (1 kHz)

----------------------------------

23,22 (15 kHz)

23,22 (1 kHz)

----------------------------------

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