SN761664

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
22页	455K
描述
DTV TUNER IC

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数据手册

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SN761664 数据手册

SN761664

DTV TUNER IC

www.ti.com

SLES184–JUNE 2006

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

External 4-Pin IF Filter Between Mixer Output

and IF Amplifier Input

I²C Bus Protocol (Bidirectional Data

RF GND

MIXOUT2

MIXOUT1

IF IN2

Transmission)

•

30-V Tuning Voltage Output

Four NPN-Type Band-Switch Drivers

One Auxiliary-Port, Five-Level ADC

RF AGC Detector Circuit

IF IN1

IF OUT1

RF AGC

AGC FIL2

AGC FIL1

BS3

IF OUT2

Crystal Oscillator Output

VCC

Programmable Reference Divider Ratio

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

VTU

BS2

•

Standby Mode

P5/ADC

BS1

5-V Power Supply

XTAL1

SDA

XTAL2

SCL

38-Pin Thin Shrink Small-Outline Package

(TSSOP)

XTALOUT

P0034-02

APPLICATIONS

•

Digital TV

Digital CATV

Set-Top Box

DESCRIPTION

The SN761664 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, and four NPN

band-switch drivers, and is available in a small-outline package. A 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...22

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