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FUNCTIONAL BLOCK DIAGRAM

B0089-01

IF

Amplifier

Operational

Amplifier

XTAL

Oscillator

128/80/64/50/

28/24Div

Phase

Detector

Charge

Pump

I CBus

2

Interface

5-Level

ADC

IFOUT1

AGCFIL1

RF AGC

VTU

CP

AGCFIL2

IFOUT2

UHFRFIN2

VLORFIN

VHIRFIN

UHFRFIN1

RFGND

XTAL1

XTAL2

XTAL OUT

SCL

SDA

AS

NPNBand-SwitchPort

VCC

VHF-L

Oscillator

VHF-H

Oscillator

UHF

Oscillator

RF

AGC

Detect

VHF-L

Mixer

VHF-H

Mixer

UHF

Mixer

Programmable

Divider

SN761664

DTV TUNER IC

SLES184 – JUNE 2006

This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with

appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.

MIXOUT1, MIXOUT2, IF IN1, and IF IN2 (pins 29 – 32) withstand 1.5 kV and all other pins withstand 2 kV, according to the

Human-Body Model (1.5 k

Ω, 100 pF).

2

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