SN761662

更新时间： 2024-09-13 09:12:03

品牌	Logo	应用领域
德州仪器 - TI		电视
页数	文件大小	规格书
20页	943K
描述
DTV TUNER IC

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数据手册

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SN761662 数据手册

SN761662

DTV TUNER IC

www.ti.com

SLES161–NOVEMBER 2005

FEATURES

DBT PACKAGE

(TOP VIEW)

•

Low-Phase-Noise Mixer/Oscillator and PLL

Synthesizer

VLO OSC B

VLO OSC C

OSC GND

VHI OSC B

VHI OSC C

UHF OSC B1

UHF OSC C1

UHF OSC C2

UHF OSC B2

IF GND

UHF RF IN2

UHF RF IN1

VHI RF IN

VLO RF IN

BS4

VHF-L, VHF-H, UHF Three-Band Local

Oscillator

I²C Bus Protocol (Bidirectional Data

Transmission)

•

30-V Tuning Voltage Output

Four NPN-Type Band-Switch Drivers

One Auxiliary-Port, Five-Level ADC

RF AGC Detector Circuit

RF GND

MIXOUT2

MIXOUT1

BUS GND

RF AGC

AGC FIL2

AGC FIL1

BS3

Crystal Oscillator Output

IF OUT1

Programmable Reference Divider Ratio

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

IF OUT2

VCC

•

Standby Mode

5-V Power Supply

38-Pin TSSOP Package

VTU

BS2

P5/ADC

BS1

XTAL1

SDA

APPLICATIONS

XTAL2

SCL

•

Digital TV

Digital CATV

Set-Top Box

XTALOUT

P0034-02

DESCRIPTION

The SN761662 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, 30-V output tuning amplifier, four

NPN band-switch drivers, and is available in a

small-outline package.

15-bit programmable

counter and reference divider are controlled by I²C

bus protocol. Tuning step frequency is selectable by

this reference divider ratio for a crystal oscillator.

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...20

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