THS6132

SLLS543A − SEPTEMBER 2002 − REVISED FEBRUARY 2003

HIGH EFFICIENCY CLASSG ADSL LINE DRIVER

FEATURES

ADSL Line Card Density (20 dBm on Line)

− 600 mW w/Active Termination (Full Bias)

− 530 mW w/Active Termination (Low Bias)

100-

Power Consumption for Short Line Lengths

− 160-mW/ch Full Bias Mode

− 135-mW/ch Mid Bias Mode

− 110-mW/ch Low Bias Mode

− 75-mW/ch Terminate Only Mode

− 13-mW/ch Shutdown Mode

− 3.3 pA/

√Hz Noninverting Current Noise

− 9.5 pA/

√Hz Inverting Current Noise

− 3.5 nV/

√Hz Voltage Noise

APPLICATIONS

DMT applications (20-dBm Line Power)

DESCRIPTION

The THS6132 is a Class-G current feedback differential

line driver ideal for full rate ADSL DMT systems. Its

extremely low power consumption of 600 mW or lower is

ideal for ADSL systems that must achieve high densities

in ADSL central office rack applications. The unique patent

pending architecture of the THS6132 allows the quiescent

current to be much lower than existing line drivers while

still achieving very high linearity. In addition, the multiple

bias settings of the amplifiers allow for even lower power

consumption for line lengths where the full performance of

the amplifier is not required. The output voltage swing has

been vastly improved over first generation Glass-G

amplifiers and allows the use of lower power supply

voltages that help conserve power. For maximum

flexibility, the THS6132 can be configured in classical

Class-AB mode requiring only as few as one power supply.

THS6132a

1:1

−6V

12.4

Ω

100

Ω

1 k

Ω

1 k

Ω

1.33 k

Ω

1.33 k

Ω

576

Ω

CODEC

CODEC

V

IN+

12.4

Ω

+20 dBm

Line

Power

THS6132b

+

−

+6V

+15V

−

+

Typical ADSL CO Line Driver Circuit Utilizing Active Impedance Supporting A 6.3 Crest Factor

− 15 V

PRODUCTION DATA information is current as of publication date. Products

conform to specifications per the terms of Texas Instruments standard warranty.

Production processing does not necessarily include testing of all parameters.

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.

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 2002−2003, Texas Instruments Incorporated