SN761662 Datasheet PDF Download, etcTI





(PDF) SN761662 Datasheet Download

Part Number SN761662
Description DTV TUNER IC
Manufacture etcTI
Total Page 23 Pages
PDF Download Download SN761662 Datasheet PDF

Features: www.ti.com FEATURES • Low-Phase-Noise Mixer/Oscillator and PLL Synthesizer VHF-L, VHF-H, UHF Three-Band Local Os cillator • I2C Bus Protocol (Bidirect ional Data Transmission) • 30-V Tunin g Voltage Output • Four NPN-Type Band -Switch Drivers • One Auxiliary-Port, Five-Level ADC • RF AGC Detector Cir cuit • Crystal Oscillator Output • Programmable Reference Divider Ratio (2 4/28/50/64/80/128) • Standby Mode • 5-V Power Supply • 38-Pin TSSOP Pack age APPLICATIONS • Digital TV • Dig ital CATV • Set-Top Box DESCRIPTION T he SN761662 is a low-phase-noise synthe sized tuner IC designed for digital TV tuning systems. The circuit consists of a PLL synthesizer, three-band local os cillator and mixer, 30-V output tuning amplifier, four NPN band-switch drivers , and is available in a small-outline p ackage. A 15-bit programmable counter a nd 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 .

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www.ti.com
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
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
IF OUT1
IF OUT2
VCC
CP
VTU
P5/ADC
XTAL1
XTAL2
XTALOUT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
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

                    
                    






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