- 您現在的位置：買賣IC網 > PDF目錄98229 > THS8083APZPG4 (TEXAS INSTRUMENTS INC) SPECIALTY CONSUMER CIRCUIT, PQFP100 PDF資料下載
參數資料
| 型號： | THS8083APZPG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
| 封裝： | GREEN, PLASTIC, HTQFP-100 |
| 文件頁數： | 8/63頁 |
| 文件大小： | 320K |
| 代理商： | THS8083APZPG4 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁當前第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁
33
Alternatively, if an external sync separator is present that generates HS and VS from CS, the separated signals can
be fed to the corresponding inputs on the THS8083A and PFD_FREEZE can be left unused. As long as HS has one
pulse per line, the PLL can lock correctly and the HS frequency monitoring register will return the correct value. VS
is only used by the field/frame frequency monitoring register and this will return the correct value as long as VS has
one pulse per field/frame. Both options are shown in Figure 24.
Ext. Logic
PFD_FREEZE
CS
THS8083A
HS
Frame Period
PFD_FREEZE High in VBI on Lines Where CS
Has Multiple Rising/Falling Edges Per Line
Option 1: Using PFD_FREEZE
Sync.
Separator
CS
THS8083A
HS
Option 2: Using HS Derived From CS
PFD_FREEZE
VS
Figure 34. Using THS8083A With a Composite Sync
as Note that the slicer only works when no video levels are lower than the blanking level and when the internal clamp
circuit is used. This is normally satisfied for G and Y channels, but not for U and V channels. To prevent unnecessary
toggling of the CS output signal, the CS output is switched off (i.e. HI-Z) automatically when mid-level clamping is
chosen for channel 1 (i.e., CLP1_RG=1 in register <CLP_CTRL>).
The source for the slicer is either Ch1 or the dedicated input CS_IN, as selected by register CS_SEL. It is
recommended to use the dedicated input by ac-coupling the Y/G signal input to both Ch1 and CS_IN (using
independent coupling capacitors). The THS8083A performs independent clamping on both inputs.
NOTE:In this revision-A silicon, PDF_FREEZE keeps the DTO output frequency constant and
disables the phase-frequency detector (PFD) from internally updating its error value at every
active edge of HS (this was not the case in prerevision-A versions). Therefore, when
PFD_FREEZE is asserted, the PLL effectively ignores incoming pulses on the HS terminal.
In this revision-A silicon, users do not need to provide an external dc biasing to the Y/G channel
since now a dedicated input terminal for composite sync slicing is provided. This was not the
case in prerevision-A versions, where the sync could only be extracted from Channel1 and a
clamp diode had to be used to establish an initial clamping level. This method is described in
the following section.
When using the dedicated CS_IN terminal, the G/Y signal should be ac-coupled to this terminal
independently from Ch1, i.e., the G/Y signal is routed via a coupling capacitor to CS_IN and
via a second coupling capacitor to Ch1. This is because the THS8083A imposes an
independent (programmable) clamp level for the sync input.
相關PDF資料 |
PDF描述 |
|---|---|
| THS8083CPZP | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
| THS8133ACPHP | PARALLEL, WORD INPUT LOADING, 0.005 us SETTLING TIME, 10-BIT DAC, PQFP48 |
| THS8133BCPHP | PARALLEL, WORD INPUT LOADING, 0.005 us SETTLING TIME, 10-BIT DAC, PQFP48 |
| THS8133BCPHPG4 | PARALLEL, WORD INPUT LOADING, 0.005 us SETTLING TIME, 10-BIT DAC, PQFP48 |
| THS8133CPHP | PARALLEL, WORD INPUT LOADING, 0.005 us SETTLING TIME, 10-BIT DAC, PQFP48 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| THS8083CPZP | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| THS8083EVM | 制造商:Texas Instruments 功能描述:THS8083EVM - Bulk |
| THS8083T | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Triple 8-Bit, 80 MSPS, 3.3-V Video and Graphics Digitizer With Digital PLL |
| THS8-10R-D | 制造商:Thomas & Betts 功能描述:CATAMOUNT CABLE TIES |
| THS8133 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:TRIPLE 10-BIT, 80 MSPS VIDEO D/A CONVERTER WITH TRI-LEVEL SYNC GENERATION WITH TRI-LEVEL SYNC GENERATION |
發布緊急采購，3分鐘左右您將得到回復。