SN761662 Datasheet, PDF (1/20 Pages) Texas Instruments – DTV TUNER IC

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FEATURES
• Low-Phase-Noise Mixer/Oscillator and PLL
Synthesizer
• 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
• Crystal Oscillator Output
• Programmable Reference Divider Ratio
(24/28/50/64/80/128)
• Standby Mode
• 5-V Power Supply
• 38-Pin TSSOP Package
APPLICATIONS
• Digital TV
• Digital CATV
• Set-Top Box
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. 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.
SN761662
DTV TUNER IC
SLES161 – NOVEMBER 2005
DBT PACKAGE
(TOP VIEW)
VLO OSC B 1
VLO OSC C 2
OSC GND 3
VHI OSC B 4
VHI OSC C 5
UHF OSC B1 6
UHF OSC C1 7
UHF OSC C2 8
UHF OSC B2 9
IF GND 10
IF OUT1 11
IF OUT2 12
VCC 13
CP 14
VTU 15
P5/ADC 16
XTAL1 17
XTAL2 18
XTALOUT 19
38 UHF RF IN2
37 UHF RF IN1
36 VHI RF IN
35 VLO RF IN
34 BS4
33 RF GND
32 MIXOUT2
31 MIXOUT1
30 NC
29 BUS GND
28 RF AGC
27 AGC FIL2
26 AGC FIL1
25 BS3
24 BS2
23 BS1
22 SDA
21 SCL
20 AS
P0034-02
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.
Copyright © 2005, Texas Instruments Incorporated