tda9808t NXP Semiconductors, tda9808t Datasheet - Page 10

• Manufacturer Part Number: tda9808t
• Description: Single Standard Vif-pll With Qss-if And Fm-pll Demodulator
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Notes to the characteristics
1. Values of video and sound parameters are decreased at V
2. Loop bandwidth BL = 70 kHz (natural frequency f
3. V
4. S/N is the ratio of black to white amplitude to the black level noise voltage (RMS value, pin 9). B = 5 MHz weighted
5. To match the AFC output signal to different tuning systems a current source output is provided (Fig.10).
6. Depending on the ratio C/C
7. Temperature coefficient of external LC-circuit is equal to zero.
8. Input level for second IF from an external generator with 50
1999 Jun 04
Single standard VIF-PLL with QSS-IF and
FM-PLL demodulator
gain control range). Resonance circuit of VCO: Q
2.7 V).
in accordance with “CCIR 567” at a source impedance of 50 .
f
connected to positive supply voltage. S/N and THD measurements are taken at 50 s (75 s at M standard)
de-emphasis.
mod
i(VIF)
= 1 kHz, 25 kHz (50% FM deviation) of audio reference. A VIF/SIF input signal is not permitted. Pin 17 has to be
signal for nominal video signal.
0
of the LC resonant circuit of VCO (Q
0
n
> 50; C
= 12 kHz; damping factor d
10
ext
P
: see Table 3; C
= 4.5 V.
source impedance. AC-coupled with 10 nF capacitor,
0
> 50; see note 2; C
int
8.5 pF (loop voltage approximately
3; calculated with sync level within
0
= C
int
Product specification
+ C
TDA9808
ext
).