SN761668

更新时间： 2024-09-15 04:03:31

品牌	Logo	应用领域
德州仪器 - TI		电视
页数	文件大小	规格书
24页	504K
描述
DIGITAL TV TUNER IC

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数据手册

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SN761668 数据手册

SN761668

DIGITAL TV TUNER IC

www.ti.com

SLES199–JANUARY 2007

FEATURES

•

Integrated Mixer/Oscillator/PLL and IF GCA

VHF-L, VHF-H, UHF 3-Band Local Oscillator

RF AGC Detector Circuit

DBT PACKAGE

(TOP VIEW)

VLO OSC B

BS4

External 4-Pin IF Filter Between Mixer Output

and IF Amplifier Input

I²C Bus Protocol Bidirectional Data

UHF RF IN1

UHF RF IN2

VHI RF IN

VLO RF IN

RF GND

MIXOUT2

MIXOUT1

IF IN2

VLO OSC C

VHI OSC B

VHI OSC C

OSC GND

UHF OSC B1

UHF OSC C1

UHF OSC C2

UHF OSC B2

IF GND

•

Transmission

•

High-Voltage Tuning Voltage Output

Four NPN-Type Band-Switch Drivers

One Auxiliary Port/5-Level ADC

Crystal Oscillator Output

IF IN1

Programmable Reference Divider Ratio

(24/28/50/64/80/128)

RF AGC OUT

RF AGC FIL

BS3

IF OUT1

IF OUT2

•

Low Distortion IF Gain Controlled Amplifier

Standby Mode

VTU

BS2

5-V Power Supply

V_CC

BS1

SDA

44-Pin Thin Shrink Small-Outline Package

(TSSOP)

IF GCA IN1

IF GCA IN2

IF GCA CTRL

IF GCA GND

IF GCA OUT2

IF GCA OUT1

P5/ADC

SCL

APPLICATIONS

BUS GND

XTAL OUT

XTAL2

•

Digital TV

Digital CATV

Set-Top Box

XTAL1

DESCRIPTION

The SN761668 is a low-phase-noise synthesized tuner IC designed for digital TV tuning systems. The circuit

consists of a PLL synthesizer, three-band local oscillator and mixer, RF AGC detector circuit, and IF

gain-controlled amplifier. The SN761668 is available in a small-outline package.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...24

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