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AD1970

更新时间： 2024-11-21 04:03:39

品牌	Logo	应用领域
亚德诺 - ADI		编码器
页数	文件大小	规格书
20页	489K
描述
Digital BTSC Encoder with Integrated ADC and DAC

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AD1970 数据手册

Digital BTSC Encoder

with Integrated ADC and DAC

AD1970

APPLICATIONS

Digital set top box

DVD player

FEATURES

Complete BTSC encoder

Pilot tone generator

Includes subcarrier modulation

Channel separation: 30 dB

Bandwidth up to 14 kHz

DVD recorder

GENERAL DESCRIPTION

Stereo analog or digital input

Phat-Stereo™ algorithm for stereo image enhancement

Dialog enhancement function for playing wide dynamic

range video sources over built-in TV speakers

Includes L − R dual-band compressor

I²C port for control of modes, effects, and parameters

Analog input performance

The AD1970 is a complete analog or digital-in, analog-out

BTSC encoder which includes pilot-tone generation and sub-

carrier mixing functions. The stereo ADC provides the means

for digitization of the analog baseband audio signal. A built-in

high performance DAC is provided to output the BTSC base-

band composite signal. The output of the AD1970 can be

connected with minimal external circuitry to the input of a

4.5 MHz aural FM modulator.

74 dB dynamic range

−72 dB THD + N

In addition to the digital BTSC encoder, the AD1970 includes a

stereo image enhancement function, Phat Stereo, to increase the

sense of spaciousness available from closely spaced TV

loudspeakers. A dialog enhancement algorithm solves the

problem of playing wide dynamic range sources over limited-

performance TV speakers and amplifiers. An I²C port allows

control of the AD1970’s registers and parameters.

Digital input performance

87 dB dynamic range

−83 dB THD + N

Integrated op amps for analog inputs and outputs

Single-ended output reduces external part count

Integrated PLL generates all clocks from composite video,

48 kHz sample clock, or high speed master clock

Sync stripper to recover video clock from composite

video signal

Output level control for setting aural carrier deviation

Macrovision™-compliant

The AD1970 utilizes ADI’s patented multibit Σ-Δ architecture to

provide BTSC performance of up to 87 dB dynamic range and a

THD+N of −83 dB.

The AD1970 includes patented BTSC stereo TV technology

licensed from THAT Corporation.

Dolby™ RF mode-compatible

48-pin LQFP plastic package

FUNCTIONAL BLOCK DIAGRAM

AD1970

ADC

DECIMATION

FILTER

ANALOG L/R

INPUTS

ADC

BTSC

ENCODER

CORE

DIGITAL AUDIO

INTERFACE

SYNC

STRIPPER

COMPOSITE

VIDEO

PLL

BTSC

ENCODED

OUTPUT

CONTROL

REGISTERS

I C I/O

I C PORT

DAC

ADC

GROUP

VOLUME

CONTROL

ANALOG

BIAS

Figure 1.

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable.

However, no responsibility is assumed by Analog Devices for its use, nor for any

infringements of patents or other rights of third parties that may result from its use.

Specifications subject to change without notice. No license is granted by implication

or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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与AD1970相关器件

型号	品牌	获取价格	描述	数据表
AD1970JSTZ	ADI	获取价格	Digital BTSC Encoder with Integrated ADC and DAC
AD1970JSTZRL	ADI	获取价格	Digital BTSC Encoder with Integrated ADC and DAC
AD1974	ADI	获取价格	4 ADC with PLL, 192 kHz, 24-Bit Codec
AD1974_13	ADI	获取价格	4 ADC with PLL
AD1974WBSTZ	ADI	获取价格	4 ADC with PLL
AD1974WBSTZ-RL	ADI	获取价格	4 ADC with PLL, 192 kHz, 24-Bit ADC
AD1974YSTZ	ADI	获取价格	4 ADC with PLL, 192 kHz, 24-Bit Codec
AD1974YSTZ-RL	ADI	获取价格	4 ADC with PLL, 192 kHz, 24-Bit Codec
AD1980	ADI	获取价格	SigmaDSP⑩ 3-Channel, 26-Bit Signal Processing
AD1980JST	ADI	获取价格	AC ’97 SoundMAX Codec

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