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參數(shù)資料
| 型號： | THS8134BTQFP |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | TRIPLE 8-BIT, 80 MSPS VIDEO D/A CONVERTER WITH TRI-LEVEL SYNC GENERATION |
| 中文描述： | 三路8位，80 MSPS的視頻D /與Tri轉(zhuǎn)爐電平同步發(fā)電 |
| 文件頁數(shù)： | 18/24頁 |
| 文件大小： | 346K |
| 代理商： | THS8134BTQFP |
THS8134, THS8134A, THS8134B
TRIPLE 8-BIT, 80 MSPS VIDEO D/A CONVERTER
WITH TRI-LEVEL SYNC GENERATION
SLVS205D – MAY 1999 – REVISED MARCH 2000
18
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
SMPTE 253M (continued)
BLANK can be tied high in this mode if the data input is kept to 00h during the blanking time, since black and
blanking level are at identical levels. Furthermore the SYNC_T terminal remains low, since only a bi-level sync
is generated.
SMPTE 274M
This standard defines a raster scanning format of 1920
×
1080 pixels inside a total raster of 1125 lines and an
aspect ratio of 16:9, GBR and YPbPr color encoding formats and both analog and digital interfaces for GBR
and YPbPr formats.
With respect to the analog interface, SMPTE 274M defines the position of the start of each line at the positive
zero-crossing of a tri-level sync pulse. The sync pulse has a negative-going transition on a fixed number of clock
cycles preceding this instant and another negative transition on a fixed number of clock cycles following this
instant, as shown in Figure 13. The positive peak of sync is 300 mV; the negative peak of sync –300 mV.
The interface can carry both GBR o and YPbPr signals. The tri-level horizontal sync is inserted on all analog
outputs and has identical absolute amplitude levels in all cases. For Y, black corresponds to a level of 0 V and
peak white is 700 mV. Pb and Pr, on the other hand, have amplitudes between –350 mV and 350 mV.
The relative amplitudes of the current sources are identical to the case of SMPTE 253M. However, in this case
a tri-level sync needs to be generated instead of a bi-level negative sync, and it needs to be present on all three
component outputs. THS8134 supports the tri-level sync via an additional internal current source, activated by
asserting SYNC_T. The sync insertion on all outputs is under the control of the INS3_INT pin. When asserted
(high), the sync is inserted on all three output channels.
0H
Analog
Waveform
(Y’R’G’B’)
Duration in
Reference
Clock period
44T
44T
1920T
Figure 13. SMPTE 274M Line Waveform
This figure is for illustration purposes only. Consult the latest SMPTE 274M standard when designing a compliant system.
Figure 14 shows the relative amplitudes of video and horizontal/vertical sync. The level of vertical sync (broad
pulse) is identical to the negative excursion of horizontal sync and therefore can be generated by the same
current source on THS8134 by appropriately asserting the sync control inputs.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| THS8134CPHP | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| THS8134TQFP | 制造商:TI 制造商全稱:Texas Instruments 功能描述:TRIPLE 8-BIT, 80 MSPS VIDEO D/A CONVERTER WITH TRI-LEVEL SYNC GENERATION |
| THS8135 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:TRIPLE 10-BIT, 240 MSPS VIDEO DAC WITH TRI-LEVEL SYNC AND VIDEO (ITU-R.BT601) COMPLIANT FULL SCALE RANGE |
| THS8135EVM | 功能描述:視頻 IC 開發(fā)工具 Triple 10B 240MSPS RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Boards 類型:YPbPr to RGBHV Converters 工具用于評估:LMH1251 工作電源電壓:5 V |
| THS8135PHP | 功能描述:數(shù)字化視頻/模擬轉(zhuǎn)換器集成電路 Triple 10B 240MSPS Video DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:3 輸出類型:Current 轉(zhuǎn)換速率:180 MSPs 分辨率:10 bit 接口類型:Parallel 電壓參考:Internal or External 積分非線性:- 2.5 LSB, 1.5 LSB 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:HTQFP 封裝:Tray |
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