Texas Instruments Inc.

- iii -

MAY 22, 2000

GC4114 QUAD TRANSMIT CHIP

DATA SHEET REV 1.0

This document contains information which may be changed at any time without notice

1.0

KEY FEATURES.......................................................................................................................... 1

2.0

BLOCK DIAGRAM ...................................................................................................................... 1

3.0

FUNCTIONAL DESCRIPTION .................................................................................................... 2

3.1

CONTROL INTERFACE........................................................................................................................ 2

3.2

INPUT FORMAT.................................................................................................................................... 3

3.3

GAIN...................................................................................................................................................... 5

3.4

THE UP-CONVERTERS ....................................................................................................................... 5

3.5

THE OVERALL INTERPOLATION FILTER RESPONSE ..................................................................... 9

3.6

THE SUM TREE.................................................................................................................................... 9

3.7

OVERALL GAIN .................................................................................................................................. 10

3.8

CLOCKING.......................................................................................................................................... 11

3.9

SYNCHRONIZATION.......................................................................................................................... 11

3.10

POWER DOWN MODES .................................................................................................................... 11

3.11

DIAGNOSTICS.................................................................................................................................... 11

3.12

INITIAL BOARD DEBUG PROCEDURE............................................................................................. 11

4.0

PACKAGING ............................................................................................................................. 12

5.0

CONTROL REGISTERS............................................................................................................14

5.1

SYNC MODE REGISTER ................................................................................................................... 15

5.2

INTERPOLATION MODE REGISTER ................................................................................................ 16

5.3

INTERPOLATION GAIN REGISTER ..................................................................................................16

5.4

INTERPOLATION REGISTERS.......................................................................................................... 17

5.5

INPUT MODE REGISTER................................................................................................................... 17

5.6

COUNTER MODE REGISTER............................................................................................................ 18

5.7

CHANNEL SYNC REGISTERS........................................................................................................... 18

5.8

CHANNEL FLUSH CONTROL REGISTER......................................................................................... 19

5.9

SUMMER MODE REGISTER ............................................................................................................. 19

5.10

STATUS CONTROL REGISTER ........................................................................................................ 20

5.11

CHECKSUM REGISTER..................................................................................................................... 20

5.12

CHANNEL INPUT REGISTERS.......................................................................................................... 21

5.13

PAGE ZERO (CHANNEL CONTROL) REGISTERS........................................................................... 21

5.14

PAGE ONE (STATUS AND TEST) REGISTERS................................................................................ 22

5.15

PAGES TWO AND THREE (COEFFICIENT) REGISTERS................................................................ 23

6.0

SPECIFICATIONS ..................................................................................................................... 24

6.1

ABSOLUTE MAXIMUM RATINGS ...................................................................................................... 24

6.2

RECOMMENDED OPERATING CONDITIONS.................................................................................. 24

6.3

THERMAL CHARACTERISTICS ........................................................................................................ 24

6.4

DC CHARACTERISTICS .................................................................................................................... 25

6.5

AC CHARACTERISTICS..................................................................................................................... 26

7.0

APPLICATION NOTES.............................................................................................................. 27

7.1

POWER AND GROUND CONNECTIONS.......................................................................................... 27

7.2

STATIC SENSITIVE DEVICE.............................................................................................................. 27

7.3

SYNCHRONIZING MULTIPLE GC4114 CHIPS ................................................................................. 27

7.4

THERMAL MANAGEMENT................................................................................................................. 27

7.5

PULSE SHAPING AND MODULATING QPSK OR QAM DATA......................................................... 28

7.6

DIAGNOSTICS.................................................................................................................................... 32

7.7

OUTPUT TEST CONFIGURATION ....................................................................................................36

7.8

INPUT TEST CONFIGURATION ........................................................................................................ 37

7.9

PERIODIC SYNC MODE .................................................................................................................... 38