Tr i p ath Technol ogy, I n c. - Techni cal I n for m ati on

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TLD4012 – JB/Rev. 2.0a/05.02

TLD4012

ADSL LINE DRIVER USING TRIPATH DIGITAL POWER

PROCESSING (DPP™) TECHNOLOGY

Technical Information

Rev i sion 2.0a – May 2002

GENERAL DESCRIPTION

T he T L D4012 is an ADSL line driver that provides very low pow er consumption and

low distortion in a very small package as a result of T r ipath’s proprietary pow er

processing technology . T h is device accepts differential input signals from an analog

front-end (AF E ), and can be used in full-rate ( G.dmt), or G.lite sy stems. T h is T L D4012

offers a low pow er consumption of 650mW for full-rate, full-pow er, CO-side, F D M

(non-overlapped) transmissions.

APPLICATIONS

Full-rate or G.lite line cards

DSLAMs

DLC equipment

Central office switches

BENEFITS

Reduced line card power

Reduced system power

Increased line card density

More ports per cubic foot of system

space

Improved system performance

Simplifies thermal management on

PCB

Improved reliability

Flexible solution

FEATURES

Tripath Proprietary Power Processing technology

Very low power consumption

Low distortion

Spurious free dynamic range = -80 dBc 26kHz to 138kHz,

Third harmonic distortion = -83 dBc at f = 100 kHz,

(differential), 70

Ω load

500 mA minimum output current into a 71

Ω load

Digitally programmable gain (from 12.8 to 27.8 dB in 1 dB steps)

Low-power mode -130 mW typical (line terminated -allows

reception of incoming signals)

Disabled mode - 10 mW typical (no line termination)

Over-temperature and over-current protection with Fault output

5x5 mm 32-pin TQFP with exposed die pad

Power

Processing

Block

INP

Control

&

Logic

Output

current

limit

LOPWR

RESETB

G0

G1

G2

INN

VDD5

GND

FAULT

OUTN

OUTP

VSS15

VDD15

VSS5

3

20

21

16

25

15

14

28

6

7

8

4

23

27

13

12

18

11

Block Diagram

G3 9

EN_AC 1

FORC_BIAS

TH_FAULT

AUTO_CLR 31

FBP

30

FBN

29

GND

5

2

GND

INP

GND

EN_AC

NC

OUTP

NC

VDD15

NC

OUTN

NC

VSS15

24

17

18

19

20

21

22

23

1

8

7

6

5

4

3

2

(Top View)

G2

G0

G1

GND

INN

32 31 30 29 28 27 26 25

1

9 10 11 12 13 14 15 16