TDA8012A Philips Semiconductors, TDA8012A Datasheet - Page 8

• Manufacturer Part Number: TDA8012A
• Description: Low power PLL FM demodulator for satellite TV receivers
• Manufacturer: Philips Semiconductors

Philips Semiconductors
6. The capture range or lock-in range is defined as the range where the PLL gets in lock. This value depends strongly
7. Measurements with test signals in accordance with CCIR recommendation 473-3;
8. No SAW filter is used at the input:
9. No SAW filter is used at the input:
10. Measurements are made under the following conditions
11. The AM sensitivity is defined as the ratio of the baseband output signals obtained from either an AM or FM modulated
12. The characteristics of the AGC function are measured in the application circuit of Fig.4. The circuit illustrated in Fig.4
1997 May 26
Low power PLL FM demodulator for
satellite TV receivers
on the loop filter characteristics.
FM modulated signal with DBS parameters:
a) 625 lines PAL TV system
b) 16 MHz/V modulator sensitivity
c) 1 V (p-p) video signal
d) No SAW filter is used.
a) 16 MHz/V modulator sensitivity
b) 4.43 MHz sine wave colour signal (660 mV (p-p))
c) 3.25 MHz sine wave luminance signal (700 mV (p-p))
d) CCIR pre-emphasis
e) Intermodulation distance is defined as the distance between the luminance signal and the intermodulation
a) 16 MHz/V modulator sensitivity
b) Two sound carriers at 7.02 MHz and 7.20 MHz; 4 MHz deviation
c) Intermodulation measurement without pre-emphasis
d) Intermodulation distance is defined as the distance between one of the sound carriers and the intermodulation
e) The video output spectrum is measured on pin 11 (point A of Fig.4) with a high resistance probe and a spectrum
a) FM modulator video signal
b) Amplitude level: 57 dB V
c) Frequency: 479.5 MHz
d) Frequency deviation: 16 MHz
e) CCIR pre-emphasis + unified weighting filter
f) C/N > 50 dB
RF input signal.
FM modulated signal: f
level = 57 dB V
AM modulated signal: f
level = 57 dB V.
has been designed to set the maximum AGC current to 1 mA. The output of the AGC function is capable of handling
up to 5 mA. The maximum AGC current can be increased to 5 mA by decreasing the value of the resistor connected
between pins 8 and 9.
S
AM
products.The video output spectrum is measured on pin 11 (point A of Fig.4) with a high resistance probe.
The de-emphasis figure is obtained from the measured data by calculation.
products
analyser.
S/N is measured after de-emphasis with a baseband spectrum from 200 kHz to 5 MHz.
=
20 log
V
--------------- -
V
o(FM)
o(AM)
c
c
= 480 MHz, frequency deviation = 25 kHz, modulation frequency = 20 kHz, input
= 480 MHz, modulation depth = 50%, modulation frequency = 20 kHz, input
8
TDA8012AM
Product specification