công cụ tìm kiếm bảng dữ liệu linh kiện điện tử
  Vietnamese  ▼
ALLDATASHEET.VN

X  

TDA9887TS/V4 bảng dữ liệu(PDF) 11 Page - NXP Semiconductors

tên linh kiện TDA9887TS/V4
Giải thích chi tiết về linh kiện  I2C-bus controlled multistandard alignment-free IF-PLL demodulator with FM radio
Download  58 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
nhà sản xuất  NXP [NXP Semiconductors]
Trang chủ  http://www.nxp.com
Logo NXP - NXP Semiconductors

TDA9887TS/V4 bảng dữ liệu(HTML) 11 Page - NXP Semiconductors

Back Button TDA9887TS/V4 Datasheet HTML 7Page - NXP Semiconductors TDA9887TS/V4 Datasheet HTML 8Page - NXP Semiconductors TDA9887TS/V4 Datasheet HTML 9Page - NXP Semiconductors TDA9887TS/V4 Datasheet HTML 10Page - NXP Semiconductors TDA9887TS/V4 Datasheet HTML 11Page - NXP Semiconductors TDA9887TS/V4 Datasheet HTML 12Page - NXP Semiconductors TDA9887TS/V4 Datasheet HTML 13Page - NXP Semiconductors TDA9887TS/V4 Datasheet HTML 14Page - NXP Semiconductors TDA9887TS/V4 Datasheet HTML 15Page - NXP Semiconductors Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 58 page
background image
2004 Aug 25
11
Philips Semiconductors
Product specification
I2C-bus controlled multistandard alignment-free
IF-PLL demodulator with FM radio
TDA9887
8.5
VCO and divider
The VCO of the VIF-FPLL operates as an integrated low
radiation relaxation oscillator at double the picture carrier
frequency. The control voltage, required to tune the VCO
to double the picture carrier frequency, is generated at the
loop filter by the frequency phase detector. The possible
frequency range is 50 to 140 MHz (typical value).
The oscillator frequency is divided-by-two to provide two
differential square wave signals with exactly 90 degrees
phase difference, independent of the frequency, for use in
the FPLL detectors, the video demodulator and the
intercarrier mixer.
8.6
AFC and digital acquisition help
Each relaxation oscillator of the VIF-PLL and FM-PLL
demodulator has a wide frequency range. To prevent false
locking of the PLLs and with respect to the catching range,
the digital acquisition help provides an individual control,
until the frequency of the VCO is within the preselected
standard dependent lock-in window of the PLL.
The in-window and out-window control at the FM-PLL is
additionally used to mute the audio stage (if auto mute is
selected via the I2C-bus).
The working principle of the digital acquisition help is as
follows. The PLL VCO output is connected to a down
counter which has a predefined start value (standard
dependent). The VCO frequency clocks the down counter
for a fixed gate time. Thereafter, the down counter stop
value is analysed. In case the stop value is higher (lower)
than the expected value range, the VCO frequency is
lower (higher) than the wanted lock-in window frequency
range. A positive (negative) control current is injected into
the PLL loop filter and consequently the VCO frequency is
increased (decreased) and a new counting cycle starts.
The gate time as well as the control logic of the acquisition
help circuit is dependent on the precision of the reference
signal at pin REF. Operation as a crystal oscillator is
possible as well as connecting this input via a serial
capacitor to an external reference frequency, e.g. the
tuning system oscillator.
The AFC signal is derived from the corresponding down
counter stop value after a counting cycle. The last four bits
are latched and can be read out via the I2C-bus
(see Table 7). Also the digital-to-analog converted value is
given as current at pin AFC.
8.7
Video demodulator and amplifier
The video demodulator is realized by a multiplier which is
designed for low distortion and large bandwidth. The VIF
signal is multiplied with the ‘in phase’ signal of the VIF-PLL
VCO.
The demodulator output signal is fed into the video
preamplifier via a level shift stage with integrated low-pass
filter to achieve carrier harmonics attenuation.
The output signal of the preamplifier is fed to the VIF-AGC
detector (see Section 8.3) and in the sound trap mode also
fed internally to the integrated sound carrier trap
(see Section 8.8). The differential trap output signal is
converted and amplified by the following postamplifier.
The video output level at pin CVBS is 2 V (p-p).
In the bypass mode the output signal of the preamplifier is
fed directly through the postamplifier to pin CVBS. The
output video level is 1.1 V (p-p) for using an external sound
trap with 10 % overall loss.
Noise clipping is provided in both cases.
8.8
Sound carrier trap
The sound carrier trap consists of a reference filter, a
phase detector and the sound trap itself.
A sound carrier reference signal is fed into the reference
low-pass filter and is shifted by nominal 90 degrees. The
phase detector compares the original reference signal with
the signal shifted by the reference filter and produces a
DC voltage by charging or discharging an integrated
capacitor with a current proportional to the phase
difference between both signals, respectively to the
frequency error of the integrated filters. The DC voltage
controls the frequency position of the reference filter and
the sound trap. So the accurate frequency position for the
different standards is set by the sound carrier reference
signal.
The sound trap itself is constructed of three separate traps
to realize sufficient suppression of the first and second
sound carriers.
8.9
SIF amplifier
The SIF amplifier consists of three AC-coupled differential
stages. Gain control is performed by emitter degeneration.
The total gain control range is typically 66 dB. The
differential input impedance is typically 2 k
Ω in parallel with
3 pF.


Số phần tương tự - TDA9887TS/V4

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
NXP Semiconductors
TDA9887TS/V4 PHILIPS-TDA9887TS/V4 Datasheet
308Kb / 58P
   I2C-bus controlled multistandard alignment-free IF-PLL demodulator with FM radio
2004 Aug 25
More results

Mô tả tương tự - TDA9887TS/V4

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
NXP Semiconductors
TDA9887 PHILIPS-TDA9887 Datasheet
308Kb / 58P
   I2C-bus controlled multistandard alignment-free IF-PLL demodulator with FM radio
2004 Aug 25
TDA9880 PHILIPS-TDA9880 Datasheet
195Kb / 40P
   Alignment-free multistandard vision and FM sound IF-PLL demodulator
1999 Jul 21
TDA9885 PHILIPS-TDA9885 Datasheet
248Kb / 56P
   I2C-bus controlled single and multistandard alignment-free IF-PLL demodulators
2003 Oct 02
TDA9886 NXP-TDA9886 Datasheet
283Kb / 56P
   I2C-bus controlled single and multistandard alignment-free IF-PLL demodulators
Rev. 03-16 December 2008
TDA9884 NXP-TDA9884_06 Datasheet
301Kb / 58P
   I2C-bus controlled multistandard alignment-free IF-PLL for mobile reception
Rev. 02-12 May 2006
TDA9884TS PHILIPS-TDA9884TS Datasheet
231Kb / 55P
   I2C-bus controlled multistandard alignment-free IF-PLL for mobile reception
2003 Nov 28
TDA9882 NXP-TDA9882 Datasheet
236Kb / 45P
   Alignment-free multistandard vision and QSS FM sound IF PLL demodulator
Rev. 01-16 November 2004
TDA9816M PHILIPS-TDA9816M Datasheet
286Kb / 44P
   Multistandard multimedia IF-PLL and FM radio demodulator
1997 Nov 19
TDA9814T PHILIPS-TDA9814T Datasheet
249Kb / 36P
   Multistandard VIF-PLL with QSS-IF and dual FM-PLL/AM demodulator
1998 Feb 09
TDA9806 PHILIPS-TDA9806 Datasheet
193Kb / 24P
   Multistandard VIF-PLL and FM-PLL demodulator
1995 Sep 05
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58


bảng dữ liệu tải về

Go To PDF Page


Link URL




Chính sách bảo mật
ALLDATASHEET.VN
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không?  [ DONATE ] 

Alldatasheet là   |   Quảng cáo   |   Liên lạc với chúng tôi   |   Chính sách bảo mật   |   Trao đổi link   |   Tìm kiếm theo nhà sản xuất
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com