TDA9885TS/V3 NXP Semiconductors, TDA9885TS/V3 Datasheet - Page 34

• Manufacturer Part Number: TDA9885TS/V3
• Description: Modulator / Demodulator ALIGN FRRE VIF/SIF CIR NEG MOD
• Manufacturer: NXP Semiconductors

Specifications of TDA9885TS/V3

• Package / Case: SSOP-24
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: - 20 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: TDA9885TS/V3,112

NXP Semiconductors
[9]
[10] Measurements taken with SAW filter M1963M (sound shelf: 20 dB); loop bandwidth BL = 70 kHz. Sound carrier on;
[11] AC load; C
[12] The sound carrier trap can be bypassed by switching the I
[13] If selected by the I
[14] The response time is valid for a VIF input level range from 200 V to 70 mV.
[15] To match the AFC output signal to different tuning systems a current output is provided. The test circuit is given in
[16] The tolerance of the reference frequency determines the accuracy of the VIF AFC, FM demodulator center frequency and maximum
[17] The intercarrier output signal at pin SIOMAD can be calculated by the following formula taking into account the internal video signal with
[18] For normal operation (with the I
[19] SIF input level is 10 mV (RMS); VIF input level is 10 mV (RMS) unmodulated.
[20] Measured with an FM deviation of 25 kHz and the typical AF output voltage of 500 mV (RMS). The AF output signal can be attenuated
[21] The lower limit of the audio bandwidth depends on the value of the capacitor at pin AFD. A value of C
[22] For all S/N measurements the VIF modulator in use has to meet the following specifications:
[23] Calculation of the loop filter parameters can be done approximately using the following formulae:
[24] Window width of digital acquisition help
[25] The PC / SC ratio is calculated as the addition of TV transmitter PC / SC
[26] Measurements taken with SAW filter G1984 (Siemens) for vision and sound IF (sound shelf: 14 dB). Picture-to-sound carrier ratio of
[27] The QSS signal output on pin SIOMAD is analyzed by a test demodulator TDA9820. The S/N ratio of this device is more than 60 dB,
TDA9885_TDA9886_3
Product data sheet
Measurements taken with SAW filter M1963M (sound shelf: 20 dB); loop bandwidth BL = 70 kHz. Modulation VSB; sound carrier off;
f
f
carrier traps (see
The amplitude is 1.1 V (p-p).
cannot be used for the normal port function.
slope (voltage per frequency) can be changed by resistors R1 and R2.
FM deviation.
1.1 V (p-p) as a reference:
correction term for RMS value,
of internal circuitry and 3 dB is the tolerance of video output and intercarrier output V
the application of a 2.2 k resistor between pin SIOMAD and ground. If this MAD2 is activated, also the power-on set-up state activates
a VIF frequency of 58.75 MHz.
by 6 dB to 250 mV (RMS) via the I
reduced in order to avoid clipping (THD < 1.5 %).
f
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
K
capacitor; C
factor. For examples, see
necessary 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 27 kHz, in accordance with “ITU-R BS.468-4” .
video
video
AF( 3dB)
O
=
deviation 27 kHz) for 6 kHz sine wave black-to-white video modulation
is the VCO steepness
> 0.5 MHz.
= 10 kHz to 10 MHz.
---------------------------------- - ;
2R K
AF
20 Hz and C
L
= 400 Hz. Measurements in accordance with “ITU-R BS.468-4” . De-emphasis is 50 s.
P
< 20 pF and R
1
O
is the parallel capacitor; f
K
D
Figure 15
C
2
C-bus, the VIF-AGC voltage can be monitored at pin OP2, and pin OP1 can be used as input. In this case, both pins
P
AF
BL
= 220 nF leads to f
Table
L
3dB
V
rad
-------- -
to
> 1 k . The sound carrier frequencies (depending on TV standard) are attenuated by the integrated sound
V
o(intc)(rms)
W
Figure
= f
--------------- - dB
V
2
V
values as noted. A different PC / SC ratio will change these values.
21.
C-bus) no DC load at pin SIOMAD is allowed. The second module address (MAD2) will be activated by
i SC
i PC
o
or
(1.55
2
C-bus. For handling a frequency deviation of more than 55 kHz, the AF output signal has to be
2
20; H (s) is the absolute value of transfer function).
o
=
------ - ;
Hz
is the natural frequency of the PLL; BL
1
V
237.5 kHz.
I
= 13 dB (transmitter)
2
1.1
2
C-bus controlled multistandard alignment-free IF-PLL demodulators
). The formulae are only valid under the following conditions:
AF( 3dB)
is the sound-to-picture carrier ratio at pins VIF1 and VIF2 in dB, 6 dB is the correction term
K
D
--------- -
2 2
Rev. 03 — 16 December 2008
is the phase detector steepness
1
40 Hz.
10
2
r
C-bus. In this way the full composite video spectrum appears at pin CVBS.
V
and
i(SIF)
r
=
= 10 mV (RMS) sync level, 27 kHz FM deviation for sound
1
----- -
20
1
ratio and SAW filter PC / SC
V
--------------- - dB
V
3dB
i PC
i SC
TDA9885; TDA9886
is the loop bandwidth for 3 dB;
-------- - ;
rad
o(intc)(rms)
A
R is the loop resistor; C
+
.
6 dB 3 dB
f
o
=
AF
1
----- -
2
ratio. This PC / SC ratio is
= 470 nF leads to
1
K
--------------- - ;
1 and C
O
C
, where:
K
© NXP B.V. 2008. All rights reserved.
P
D
Figure
S
is the series
S
is the damping
> 5C
--------- -
2 2
1
12. The AFC
P
, where:
is the
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