GC1012A Datasheet, PDF (4/30 Pages) Texas Instruments – DIGITAL TUNER CHIP

GC1012A DIGITAL TUNER CHIP
DATA SHEET REV 0.0
TABLE OF CONTENTS
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
1.10
1.11
FUNCTIONAL DESCRIPTION ....................................................................................................1
KEY FEATURES ................................................................................................................................... 1
BLOCK DIAGRAM................................................................................................................................. 2
CONTROL INTERFACE........................................................................................................................ 2
DIGITAL OSCILLATOR......................................................................................................................... 3
MIXER ................................................................................................................................................... 4
PROGRAMMABLE LOW PASS FILTER............................................................................................... 4
GAIN...................................................................................................................................................... 5
OUTPUT FORMATTING ....................................................................................................................... 6
POWER DOWN AND KEEPALIVE MODES ......................................................................................... 6
THE ONE SHOT PULSE GENERATOR ............................................................................................... 6
DIAGNOSTICS...................................................................................................................................... 7
2.0
PIN DESCRIPTIONS ...................................................................................................................8
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
CONTROL REGISTERS............................................................................................................10
FREQUENCY WORD REGISTERS.................................................................................................... 11
SYNC MODE REGISTER ................................................................................................................... 12
FILTER MODE REGISTER ................................................................................................................. 13
GAIN CONTROL REGISTERS ........................................................................................................... 14
OUTPUT MODE REGISTER............................................................................................................... 15
OUTPUT STATUS REGISTER ........................................................................................................... 16
ONE SHOT ADDRESS ....................................................................................................................... 17
CHECKSUM REGISTER..................................................................................................................... 17
I AND Q OUTPUT REGISTERS.......................................................................................................... 17
4.0
4.1
4.2
4.3
4.4
4.5
SPECIFICATIONS .....................................................................................................................18
ABSOLUTE MAXIMUM RATINGS ...................................................................................................... 18
RECOMMENDED OPERATING CONDITIONS.................................................................................. 18
THERMAL CHARACTERISTICS ........................................................................................................ 18
DC CHARACTERISTICS .................................................................................................................... 19
AC CHARACTERISTICS..................................................................................................................... 20
5.0
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
APPLICATION NOTES..............................................................................................................21
POWER AND GROUND CONNECTIONS.......................................................................................... 21
STATIC SENSITIVE DEVICE.............................................................................................................. 21
80 MHZ OPERATION.......................................................................................................................... 21
REDUCED VOLTAGE OPERATION................................................................................................... 21
SYNCHRONIZING MULTIPLE GC1012A CHIPS ............................................................................... 22
PROCESSING COMPLEX DATA ....................................................................................................... 22
EXAMPLE RECEIVER ARCHITECTURE ........................................................................................... 23
LATENCY THROUGH THE GC1012A................................................................................................ 24
GRAYCHIP,INC.
-iii-
FEBRUARY 18, 1998
This document contains information which may be changed at any time without notice