TDA9880 datasheet(18/40 Pages) PHILIPS

18 / 40 page

1999 Jul 21

Philips Semiconductors

Product speciﬁcation

Alignment-free multistandard vision and

FM sound IF-PLL demodulator

TDA9880

Notes

1. Values of video and sound parameters can be decreased at VP = 4.5 V.

2. This parameter is tested with 110 mV to ensure maximum input level.

3. This parameter is not tested during production and is only given as application information for designing the television

receiver.

4. Loop bandwidth BL = 70 kHz (damping factor d = 1.9; calculated with sync level within gain control range).

Calculation of the VIF-PLL filter can be done by use of the following formulae:

, valid for d

≥ 1.2

where:

KO = VCO steepness

; KD = phase detector steepness

;

R = loop resistor; C = loop capacitor; BL−3dB = loop bandwidth for −3 dB; d = damping factor.

5. Vi(VIF)(rms) = 10 mV; ∆f = 1 MHz (VCO frequency offset related to picture carrier frequency); white picture video

modulation.

6. Vi(VIF) signal for nominal video signal.

7. Broadband transformer at VIF input. The C/N ratio at VIF input is defined as the VIF input signal (sync level,

RMS value) related to a superimposed 4.2 MHz band-limited white noise signal (RMS value); white picture video

modulation.

8. The sound carrier frequencies (depending on TV standard) are attenuated by the integrated sound carrier traps

(see Figs 13 to 18);

H (s) is the absolute value of transfer function.

9. S/N is the ratio of black-to-white amplitude to the black level noise voltage (RMS value, pin 13).

B = 4.2 MHz (M/N standard) or B = 5.0 MHz (B/G, I and D/K standard).

10. The intermodulation figures are defined:

;

αd0.92 value at 0.92 MHz referenced to black or white signal;

;

αd2.76 value at 2.76 MHz referenced to chrominance carrier.

11. Measurements taken with SAW filter M1963M (sound shelf: 20 dB); loop bandwidth BL = 70 kHz.

a) Modulation Vestigial Side-Band (VSB); sound carrier off; fvideo > 0.5 MHz.

b) Sound carrier on; fvideo = 10 kHz to 10 MHz.

12. The sound carrier trap can be disabled by switching pin 12 to ground (<0.8 V). In this way the full composite video

spectrum appears at pin 13. The amplitude is 1.1 V (p-p).

13. Response time valid for a VIF input level range of 200

µVto70mV.

Vref(rms)

amplitude of reference signal

source (RMS value)

operation as input

terminal

−

400

Ro(ref)

output resistance of reference

source

−−

4.7

Ω

decoupling capacitance to

external reference source

operation as input

terminal

100

−

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

3 dB

–

------- KOKDR

--- RKOKDC

rad

--------





-------





µA

rad

--------





αd

0.92

0 at 3.58 MHz

0 at 0.92 MHz

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



 3.6 dB

log

αd

2.76

0 at 3.58 MHz

0 at 2.76 MHz

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





log

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