TDA9881TS/V5,118 NXP Semiconductors, TDA9881TS/V5,118 Datasheet - Page 24

• Manufacturer Part Number: TDA9881TS/V5,118
• Description: IC IF-PLL DEMOD 24SSOP
• Manufacturer: NXP Semiconductors
• Type: Demodulatorr

Specifications of TDA9881TS/V5,118

• Package / Case: 24-SSOP
• Applications: Set-Top Boxes
• Mounting Type: Surface Mount
• Maximum Operating Temperature: + 70 C
• Maximum Power Dissipation: 385 mW
• Minimum Operating Temperature: - 20 C
• Modulation Type: Quadrature
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 5 V
• Supply Current: 70 A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 935288679118

Philips Semiconductors
[21] For all S/N measurements the used VIF modulator has to meet the following specifications:
[22] Calculation of the loop filter can be done approximately by use of the following formulae:
[23] The PC/SC ratio is calculated as the addition of TV transmitter PC/SC
[24] Measurements taken with SAW filter G1984 (Siemens) for vision and sound IF (sound shelf: 14 dB). Picture-to-sound carrier ratio of
[25] The QSS signal output on pin QSSO is analyzed by a test demodulator TDA9820. The S/N ratio of this device is more than 60 dB,
[26] Measurements taken with SAW filter G3962 for vision IF (suppressed sound carrier) and K9350 for sound IF (suppressed picture
[27] The value of C
[28] Pin REF is able to operate as a 1-pin crystal oscillator input as well as an external reference signal input, e.g. from the tuning system.
Table 11:
Table 12:
9397 750 13417
Product data sheet
BL
100
160
Description
VIF carrier
SIF carrier
Picture-to-sound
carrier ratio
3dB
a) Incidental phase modulation for black-to-white jump less than 0.5 degrees.
b) QSS AF performance, measured with the television demodulator AMF2 (audio output, weighted S/N ratio) better than 60 dB (at
c) Picture-to-sound carrier ratio PC/SC
The formulae are only valid under the following conditions:
where: K
capacitor; C
For examples, see
to achieve the S/N
transmitter PC/SC = 13 dB. Input level on pins VIF1 and VIF2 of V
carrier, f
related to a deviation of
carrier). Input level V
BL
f
o
=
deviation 27 kHz) for 6 kHz sine wave black-to-white video modulation.
–
1 and C
=
(kHz)
3dB
---------------------------------- -
2R K
----- -
2
1
AF
Examples to the FM PLL filter
Input frequencies and carrier ratios
O
=
is the VCO steepness
= 400 Hz. Measurements in accordance with “CCIR 468” . De-emphasis is 50 s.
K
--------------- -
S
P
1
O
f
o
O
C
> 5C
K
is the parallel capacitor; f
x
K
P
1.55
D
determines the accuracy of the resonance frequency of the crystal. It depends on the used type of crystal.
D
C
W
P
Table
P
values as noted. A different PC/SC ratio will change these values.
–
i(SIF)
C
10
10
Symbol
f
f
f
SC
SC
PC
SC1
SC2
2
11.
S
= 10 mV (RMS), 27 kHz (54 % FM deviation).
27 kHz, in accordance with “CCIR 468” .
1
2
(nF)
rad
------ -
V
o
1
is the natural frequency of PLL; BL
or
= 13 dB (transmitter).
2
Hz
------ -
V
Rev. 01 — 16 November 2004
C
390
150
B/G standard
38.9
33.4
33.158
13
20
; K
P
D
(pF)
is the phase detector steepness
Alignment-free vision and FM sound IF PLL demodulator
i(SIF)
1
ratio and SAW filter PC/SC
= 10 mV (RMS) sync level, 27 kHz FM deviation for sound
3dB
is the loop bandwidth for 3 dB;
R (k )
5.6
9.1
M/N standard
45.75 or 58.75
41.25 or 54.25
-
7
-
------ -
rad
A
; R is the loop resistor; C
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
1
ratio. This PC/SC ratio is necessary
0.5
0.5
Unit
MHz
MHz
MHz
dB
dB
TDA9881
is the damping factor.
S
is the series
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