参数资料
型号: TDA8822M/C1
厂商: NXP SEMICONDUCTORS
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PDSO24
封装: PLASTIC, SSOP-24
文件页数: 22/31页
文件大小: 860K
代理商: TDA8822M/C1
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Product INFOrmation page
Information as of 2001-06-06
TDA8822; Universal IC-bus programmable RF modulator
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Description
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The TDA8822 is a programmable modulator which generates an RF TV channel from a baseband video signal and a baseband audio signal in the event of negative video and FM
sound standards (B/G, I, D/K, M and N standards).
Two PLL frequency-synthesizers set the picture carrier frequency and the sound subcarrier frequency to the required frequencies. These PLL frequency-synthesizers are
programmed via the I2C-bus.
The I2C-bus controls these features:
Video modulation depth
q
Sound subcarrier modulation deviation
q
Picture-to-sound ratio.
q
This makes the IC suitable for multistandard applications without any adjustment into the application. Additional features are provided like an input for the NICAM or second FM
carrier, a test pattern signal generator with a LED driver and a general purpose output port.
Features
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5 V power supply
q
Video amplifier with clamp and white clip circuits
q
Programmable video modulation depth
q
FM sound modulator (4.5, 5.5, 6.0 and 6.5 MHz)
q
Programmable picture-to-sound ratio
q
Programmable deviation of the sound subcarrier
q
Input for modulated NICAM sound subcarrier or second frequency modulated sound subcarrier
q
Asymmetrical or symmetrical RF output buffer
q
Symmetrical RF oscillator for UHF or VHF band according to the application
q
One I2C-bus programmable output port
q
On-chip Phase-Locked Loop (PLL) frequency synthesizer for the RF carrier
q
On-chip PLL frequency synthesizer for the sound carrier
q
On-chip power supply regulator
q
On-chip I2C-bus and/or hardware controlled Test Pattern Signal Generator (TPSG) with LED driver
q
RF output switch-off during tuning.
q
Philips Semiconductors: Product information on TDA8822, Universal IC-bus programmable RF modulator
file:///J|/imaging/BITTING/mail_pdf/cpl_images/c1_TDA8822.html (1 of 3) [7/20/2001 5:10:43 PM]
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