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| 型号： | MAX9526ATJ+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/38页 |
| 文件大小： | 0K |
| 描述： | IC VID DECODER NTSC/PAL 32-TQFN |
| 其它有关文件： | Automotive Product Guide |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 视频解码器 |
| 应用： | 车载系统，播放器，电视 |
| 电压 - 电源，模拟： | 1.8V |
| 电压 - 电源，数字： | 1.8V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN-EP（5x6） |
| 包装： | 带卷 (TR) |
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VREF Generation
A differential signal path is used to process the analog
video signal to minimize the effect of noise coupling. A
DC reference (VREF) of 850mV is internally generated
and decoupled externally with a 0.1F capacitor.
Identical signal paths and video buffers are used for
both the selected video input and the video reference
voltage. The signals are converted to a fully differential
signal by the analog AGC circuit.
DC Restoration DAC
The video inputs, VIN1 and VIN2, are AC-coupled to the
MAX9526 with 0.1F capacitors. The DC restoration cir-
cuit sets the sync level at the output of the ADC by sink-
ing or sourcing current at the selected video input. A
digital control at the ADC output is used to monitor the
average sync level. An error signal is generated in the
digital control block that is used by a current DAC to
source or sink current to the AC-coupled input to
restore the DC level. The DC restoration circuit also cor-
rects the offset in the analog signal chain and sets the
sync level at the ADC output to code 32 (decimal).
Analog Automatic Gain Control (Analog AGC)
The MAX9526 includes an analog variable-gain amplifi-
er with a digitally controlled gain for automatic gain
control (AGC). The AGC uses the sync amplitude at the
output of the ADC to control the gain. For signals with-
out copy protection, the AGC adjusts the gain until the
sync amplitude is 208 (decimal) codes at the ADC out-
put. For inputs with copy protection, the AGC automati-
cally compensates for the reduced sync amplitude on
active lines.
The analog AGC loop can be disabled and the gain is
set manually to 1 of 16 values using the Gain Control
register 0x0A. The range of analog gain is 3.5dB to
12dB.
Analog Lowpass Filter (LPF)
The MAX9526 includes a high-performance anti-aliasing
analog lowpass filter with a 3dB bandwidth of 13MHz
(typ) and better than 0.25dB (typ) passband flatness to
5MHz. This eliminates the need for external filtering on
the video inputs. The filter typically provides 36dB atten-
uation at 53MHz (1MHz below ADC sample rate).
54Msps Video ADC
A 10-bit, 54Msps ADC converts the filtered analog
composite video signal for digital signal processing
(composite video demodulation).
Digital Filtering
Digital filtering at the ADC output removes any out-of-
band interference and improves the signal-to-noise
ratio before decoding. The signal path includes a digi-
tal anti-aliasing lowpass filter that has 1dB of passband
flatness to 5.5MHz and a minimum of 45dB of stopband
attenuation for frequencies greater than 9MHz.
Sync Processing, Clock Generation,
and PLL
The sync processing, clock generation, and PLL extract
the timing information from incoming video and gener-
ate the clock for the rest of the chip. Figure 2 shows the
block diagram for this block.
Crystal Oscillator/Clock Input
The MAX9526 includes a low-jitter crystal oscillator cir-
cuit optimized for use with an external 27MHz crystal.
The device also accepts an external CMOS logic-level
clock at either 27MHz or 54MHz. To use an external
clock (27MHz or 54MHz) instead of a crystal, set
XTAL_DIS = 1 in register 0x0D. To use a 54MHz exter-
nal clock instead of a 27MHz clock, SEL_54MHz must
also be set to 1 in register 0x0D.
Low-Power, High-Performance
NTSC/PAL Video Decoder
OSCILLATOR
XTAL/OSC
XTAL2
CLOCK
GENERATOR
AND PLL
SYNC
PROCESSING
10
FROM AFE
MUX
CLOCK
NONSTD
VIDEO
MUX
Figure 2. Sync Processing, Clock Generation, and PLL
MAX9526
Maxim Integrated
11
相关PDF资料 |
PDF描述 |
|---|---|
| MAX9526AEI/V+ | IC VID DECODER NTSC/PAL 28QSOP |
| VE-2NK-IY-F1 | CONVERTER MOD DC/DC 40V 50W |
| VE-B4T-IX-B1 | CONVERTER MOD DC/DC 6.5V 75W |
| VE-2NJ-IY-F3 | CONVERTER MOD DC/DC 36V 50W |
| VI-BWH-IY-F4 | CONVERTER MOD DC/DC 52V 50W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9526EVKIT+ | 功能描述:视频 IC 开发工具 MAX9526 Eval Kit RoHS:否 制造商:Texas Instruments 产品:Evaluation Boards 类型:YPbPr to RGBHV Converters 工具用于评估:LMH1251 工作电源电压:5 V |
| MAX952C/D | 功能描述:特殊用途放大器 Ultra-Low-Power Single-Supply Op Amp + Comparator + Reference RoHS:否 制造商:Texas Instruments 通道数量:Single 共模抑制比（最小值）: 输入补偿电压: 工作电源电压:3 V to 5.5 V 电源电流:5 mA 最大功率耗散: 最大工作温度:+ 70 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-20 封装:Reel |
| MAX952C/D+ | 功能描述:特殊用途放大器 RoHS:否 制造商:Texas Instruments 通道数量:Single 共模抑制比（最小值）: 输入补偿电压: 工作电源电压:3 V to 5.5 V 电源电流:5 mA 最大功率耗散: 最大工作温度:+ 70 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-20 封装:Reel |
| MAX952EPA | 功能描述:特殊用途放大器 RoHS:否 制造商:Texas Instruments 通道数量:Single 共模抑制比（最小值）: 输入补偿电压: 工作电源电压:3 V to 5.5 V 电源电流:5 mA 最大功率耗散: 最大工作温度:+ 70 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-20 封装:Reel |
| MAX952EPA+ | 功能描述:特殊用途放大器 Op Amp / Comparator / Reference RoHS:否 制造商:Texas Instruments 通道数量:Single 共模抑制比（最小值）: 输入补偿电压: 工作电源电压:3 V to 5.5 V 电源电流:5 mA 最大功率耗散: 最大工作温度:+ 70 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-20 封装:Reel |
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