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| 型号： | TDA9884HN |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 接收器 |
| 英文描述： | AM/FM, AUDIO/VIDEO DEMODULATOR, PQCC32 |
| 封装： | 5 X 5 MM, 0.85 MM HEIGHT, PLASTIC, MO-220, HVQFN-32 |
| 文件页数： | 31/58页 |
| 文件大小： | 290K |
| 代理商： | TDA9884HN |
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TDA9884_2
Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet
Rev. 02 — 12 May 2006
37 of 58
Philips Semiconductors
TDA9884
I2C-bus controlled multistandard alignment-free IF-PLL
[25] 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
by 6 dB to 250 mV (RMS) via the I2C-bus. For handling a frequency deviation of more than 55 kHz, the AF output signal has to be
reduced in order to avoid clipping (THD < 1.5 %).
[26] The lower limit of the audio bandwidth depends on the value of the capacitor at pin AFD. A value of CAF = 470 nF leads to
fAF(3dB) ≈ 20 Hz and CAF = 220 nF leads to fAF(3dB) ≈ 40 Hz.
[27] For all S/N measurements the VIF modulator in use has to meet the following specications:
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
deviation 27 kHz) for 6 kHz sine wave black-to-white video modulation.
c) Picture-to-sound carrier ratio PC/SC1 = 13 dB (transmitter).
[28] Calculation of the loop lter parameters can be done approximately using the following formulae:
BL3dB = fo(1.55 2). The formulae are only valid under the following conditions: ≤ 1 and CS >5CP, where:
KO is the VCO steepness
or
KD is the phase detector steepness
R is the loop resistor; CS is the series
capacitor; CP is the parallel capacitor; fo is the natural frequency of the PLL; BL3dB is the loop bandwidth for 3 dB; is the damping
factor. For examples, see Table 26.
[29] The PC/SC ratio is calculated as the addition of TV transmitter PC/SC1 ratio and SAW lter PC/SC1 ratio. This PC/SC ratio is necessary
to achieve the S/NW values as noted. A different PC/SC ratio will change these values.
[30] Measurements taken with SAW lter G1984 (Siemens) for vision and sound IF (sound shelf: 14 dB). Picture-to-sound carrier ratio of
transmitter PC/SC = 13 dB. Input level on pins VIF1 and VIF2 of Vi(SIF) = 10 mV (RMS) sync level, 27 kHz FM deviation for sound
carrier, fAF = 400 Hz. Measurements in accordance with “ITU-R BS.468-4”. De-emphasis is 50 s.
[31] 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,
related to a deviation of
±27 kHz, in accordance with “ITU-R BS.468-4”.
[32] Measurements taken with SAW lter K3953 for vision IF (suppressed sound carrier) and K9453 for sound IF (suppressed picture
carrier). Input level Vi(SIF) = 10 mV (RMS), 27 kHz (54 % FM deviation).
[33] Measurements taken with SAW lter K9453 (Siemens) for AM sound IF (suppressed picture carrier).
[34] The value of Cx determines the accuracy of the resonance frequency of the crystal. It depends on the type of crystal used.
[35] 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.
[36] The SDA and SCL lines will not be pulled down if VCC is switched off.
[37] The AC characteristics are in accordance with the I2C-bus specication for fast mode (maximum clock frequency is 400 kHz).
Information about the I2C-bus can be found in the brochure
“The I2C-bus and how to use it” (order number 9398 393 40011).
[38] Port P1 and port P2 are open-collector outputs.
f
o
1
2
π
------
K
OK D
C
P
----------------;
=
1
2R K
OK DCP
-----------------------------------;
=
rad
V
---------
2
π
Hz
V
-------
;
A
rad
---------
;
Table 26.
Examples for Table note 28 of Table 25 (FM-PLL lter)
BL3dB (kHz)
CS (nF)
CP (pF)
R(k
)
100
10
390
5.6
0.5
160
10
150
9.1
0.5
Table 27.
Input frequencies and carrier ratios
Description
Symbol B/G standard
M/N standard
L standard L accent standard Unit
VIF carrier
fPC
38.9
45.75 or 58.75
38.9
33.9
MHz
SIF carrier
fSC1
33.4
41.25 or 54.25
32.4
40.4
MHz
fSC2
33.158
-
MHz
Picture-to-sound carrier ratio
SC1
13
7
10
dB
SC2
20
-
dB
相关PDF资料 |
PDF描述 |
|---|---|
| TDA9885HN/V5 | AM/FM, AUDIO/VIDEO DEMODULATOR, PQCC32 |
| TDA9885T/V5 | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
| TDA9885TS/V5 | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
| TDA9886HN/V5 | AM/FM, AUDIO/VIDEO DEMODULATOR, PQCC32 |
| TDA9886T/V5 | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TDA9884TS | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:I2C-bus controlled multistandard alignment-free IF-PLL for mobile reception |
| TDA9884TS/V1 | 功能描述:调节器/解调器 MOBILE VIF AND SIF DEMODULATOR RoHS:否 制造商:Texas Instruments 封装 / 箱体:PVQFN-N24 封装:Reel |
| TDA9884TS/V1,112 | 功能描述:调节器/解调器 MOBILE VIF AND SIF RoHS:否 制造商:Texas Instruments 封装 / 箱体:PVQFN-N24 封装:Reel |
| TDA9884TS/V1,118 | 功能描述:调节器/解调器 MOBILE VIF AND SIF RoHS:否 制造商:Texas Instruments 封装 / 箱体:PVQFN-N24 封装:Reel |
| TDA9884TS/V1/S1,11 | 功能描述:调节器/解调器 MOBILE VIF AND SIF RoHS:否 制造商:Texas Instruments 封装 / 箱体:PVQFN-N24 封装:Reel |
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