TDA9882 Philips Semiconductors, TDA9882 Datasheet - Page 12

• Manufacturer Part Number: TDA9882
• Description: Alignment-free multistandard vision and QSS FM sound IF PLL demodulator
• Manufacturer: Philips Semiconductors

Philips Semiconductors
9397 750 13507
Product data sheet
8.15 Internal voltage stabilizer
8.16 Logic
The band gap circuit internally generates a voltage of approximately 2.4 V, independent of
the supply voltage and the temperature. A voltage regulator circuit, connected to this
voltage, produces a constant voltage of 3.55 V which is used as an internal reference
voltage.
The logic circuit detects the logic level at the logic ports VIF0, FM0 and FM1 as well as the
presence of resistors (DC current to ground) at pins QSSO, SIF1 and SIF2 and controls
the internal functions; see
open-circuit (high-ohmic or CMOS HIGH level) TV standard NTSC with a vision carrier
frequency of 45.75 MHz, an FM sound carrier frequency of 4.5 MHz, de-emphasis with
75 s time constant and auto mute on is selected.
Table 4:
Table 5:
[1]
Table 6:
QSSO
No resistor at pin
No resistor at pin
2.2 k resistor to ground at pin pin open-circuit
2.2 k resistor to ground at pin pin connected to ground 38.9
FM0
Pin open-circuit
Pin connected to
ground
Pin open-circuit
Pin connected to
ground
SIF1 and SIF2
No DC path to ground
One or both pins connected to ground
For positive modulation choose 6.5 MHz.
VIF frequency selection
FM carrier frequency selection and de-emphasis settings
Auto mute on/off selection
Rev. 01 — 16 November 2004
FM1
pin open-circuit
pin open-circuit
pin connected to
ground
pin connected to
ground
Multistandard vision and QSS FM sound IF PLL demodulator
Table 4
VIF0
pin open-circuit
pin connected to ground 38.9
to
Table
6. In the event that all logic ports are
FM carrier frequency
(MHz)
4.5
5.5
6.0
6.5
Auto mute
on
off
[1]
VIF frequency (MHz) Modulation
45.75
33.9
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
De-emphasis ( s)
75
50
50
50
TDA9882
www.DataSheet4U.com
negative
negative
positive
positive
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