- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄368630 > TDA8758G (NXP SEMICONDUCTORS) YC 8-bit low-power analog-to-digital video interface PDF資料下載
參數(shù)資料
| 型號： | TDA8758G |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | ADC |
| 英文描述： | YC 8-bit low-power analog-to-digital video interface |
| 中文描述： | 2-CH 8-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP48 |
| 封裝： | PLASTIC, SOT-313-2, LQFP-48 |
| 文件頁數(shù)： | 6/24頁 |
| 文件大?。?/td> | 196K |
| 代理商： | TDA8758G |
1996 Feb 01
6
Philips Semiconductors
Product specification
YC 8-bit low-power analog-to-digital video
interface
TDA8758
FUNCTIONAL DESCRIPTION
The TDA8758 provides a simple interface between CVBS
or Y/C analog signals and a digital colour decoder.
Video inputs selection
The input selector allows a choice from different video
sources, and has one of the following configurations:
A: Two Y/C and one CVBS signals
B: One Y/C and two CVBS signals
C: Three CVBS signals (only the Y channel is used).
The wiring of the five video inputs (pins 2, 4, 6, 9 and 11)
and the control of the two selection inputs (pins 5 and 12)
will depend on the available video sources.
In configuration A, connect as follows:
– Y1 to pin 11
– C1 to pin 4
– Y2 to pin 9
– C2 to pin 2
– CVBS3 to pin 6.
Keep SEL2 (pin 5) LOW and select Y1/C1 or Y2/C2 by
switching SEL1 (pin 12).
CVBS3 is selected with SEL1 and SEL2 HIGH.
In configuration B, replace Y1 (or Y2) by a CVBS input
(no more C1 or C2). The selection mode is the same.
In configuration C, connect as follows:
– CVBS1 to pin 11
– CVBS2 to pin 9
– CVBS3 to pin 6.
Use both SEL1 and SEL2 to select inputs.
Remark
: the video inputs selection is a static selection.
Synchronization pulses
GATE A and GATE B pulses are synchronization pulses
occurring during the sync period and rear porch
respectively. They should be distinct.
On the Y channel, the digital output of the ADC is
compared to internal digital reference levels. The resultant
outputs control the charge or discharge current of a
capacitor connected to the C
AGC
pin. The voltage across
this capacitor controls the gain of the video amplifier.
This is the control loop.
The sync level comparator is active during a positive-going
pulse at the GATE A input. This means that sync pulse of
the composite video signal is used as an amplitude
reference. The bottom of the sync pulse is adjusted to
obtain a digital output of logic 1 at the converter Y output.
As the black level is digital level 64, the sync pulse will
have a digital amplitude of 64 LSBs.
The Peak White control loop is active when the selection
pin PWE is LOW. Then, if the Y video signal exceeds the
digital code of 255, it will be limited to avoid any over-range
of the converter.
The clamp level control is accomplished by using the same
techniques as used for the gain control. On both Y and C
channels, the black level digital comparators are active
during a positive-going pulse at the GATE B input. On the
Y channel, the clamping capacitor connected to the C
CLPY
pin will be charged or discharged to adjust the digital
output to code 64. On the C channel, the clamping
capacitor connected to the C
CLPC
pin will be charged or
discharged to adjust the digital output to code 128.
相關PDF資料 |
PDF描述 |
|---|---|
| TDA8763AM | 10-bit high-speed low-power ADC |
| TDA8763M | 10-bit high-speed low-power ADC with internal reference regulator |
| TDA8764A | 10-bit high-speed low-power ADC |
| TDA8764AHL | 10-bit high-speed low-power ADC |
| TDA8764ATS | 10-bit high-speed low-power ADC |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA8759HV/8/C1 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 3X8-BITS VIDEO ADC 110MSPS RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TDA8759HV/8/C1,551 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 3X8-BITS VIDEO RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TDA8759HV/8/C1,557 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 3X8-BITS VIDEO RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TDA8759HV/8/C1-S | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 3X8-BITS VIDEO ADC 110MSPS RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TDA8760 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:10-bit high-speed analog-to-digital converter |
發(fā)布緊急采購，3分鐘左右您將得到回復。