SN761640

更新时间： 2024-09-13 12:21:43

品牌	Logo	应用领域
德州仪器 - TI		电视
页数	文件大小	规格书
30页	1048K
描述
DIGITAL TV TUNER IC

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数据手册

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SN761640 数据手册

SN761640

www.ti.com .............................................................................................................................................................................................. SLES237–OCTOBER 2008

DIGITAL TV TUNER IC

FEATURES

DBT PACKAGE

(TOP VIEW)

•

Integrated Mixer/Oscillator/PLL and IF GCA

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

RF AGC Detector Circuit

VLO OSC B

BS4

UHF RF IN1

UHF RF IN2

VHI RF IN

VLO RF IN

RF GND

MIX OUT2

MIX OUT1

IF IN

VLO OSC C

VHI OSC B

VHI OSC C

UHF OSC B1

UHF OSC C1

UHF OSC C2

UHF OSC B2

OSC GND

I²C Bus Protocol

Bidirectional Data Transmission

•

High-Voltage Tuning Voltage Output

Four NPN-Type Band Switch Drivers

One Auxiliary Port/5-Level ADC

Crystal Oscillator Output

Programmable Reference Divider Ratio

(24/28/32/64/80/128)

RF AGC OUT

RF AGC BUF

BS3

VTU

•

IF GCA Enable/Disable Control

Selectable digital IFOUT and Analog IFOUT

Standby Mode

IF GND

BS2

AIF OUT

DIF OUT1

BS1

5-V Power Supply

DIF OUT2

SDA

44-Pin Thin Shrink Small-Outline Package

(TSSOP)

SCL

IFGCA CTRL

VCC

BUS GND

P5/ADC

XTAL OUT

XTAL2

IF GCA IN1

IF GCA IN2

IF GCA GND

IF GCA OUT2

IF GCA OUT1

APPLICATIONS

•

Digital TVs

Digital CATVs

Set-Top Boxes

XTAL1

DESCRIPTION

The SN761640 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 SN761640 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...30

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