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DESCRIPTION

TYPICAL ADSL CO-LINE DRIVER CIRCUIT

APPLICATIONS

+

−

THS6182a

+12 V

−12 V

+

−

1:1.2

−12 V

+12V

8.68

Ω

100

Ω

1 k

Ω

1 k

Ω

1.33 k

Ω

1.33 k

Ω

953

Ω

CODEC

V

IN−

CODEC

V

IN+

8.68

Ω

20-dBm

Line

Power

THS6182b

THS6182

SLLS544H – SEPTEMBER 2002 – REVISED JUNE 2007

LOW-POWER DISSIPATION ADSL LINE DRIVER

• Low-Power Dissipation Increases ADSL Line

The THS6182 is a current feedback differential line

Card Density

driver ideal for full rate ADSL systems. Its extremely

low-power dissipation is ideal for ADSL systems that

• Low THD of -88 dBc (100 Ω, 1 MHz)

must achieve high densities in ADSL central office

• Low MTPR Driving +20 dBm on the Line

rack applications. The unique architecture of the

–

-76 dBc With High Bias Setting

THS6182 allows the quiescent current to be much

lower than existing line drivers while still achieving

–

-74 dBc With Low Bias Setting

high linearity without the need for excess open loop

• Wide Output Swing of 44 V

gain. Fixed multiple bias settings of the amplifiers

a 200-

Ω Differential Load (V

allow for enhanced power savings for line lengths

• High Output Current of 600 mA (Typ)

where the full performance of the amplifier is not

required. To allow for even more flexibility and power

• Wide Supply Voltage Range of ±5 V to ±15 V

• Pin Compatible with EL1503C and EL1508C

bias currents while maintaining stable operation with

–

Multiple Package Options

as little as 1.8 mA per channel. The wide output

• Multiple Power Control Modes

supplies allows for more dynamic headroom, keeping

–

11 mA/ch Full Bias Mode

distortion at a minimum. With a low 3.2 nV/

√Hz

–

7.5 mA/ch Mid Bias Mode

voltage noise coupled with a low 10 pA/

√Hz inverting

–

4 mA/ch Low Bias Mode

current noise, the THS6182 increases the sensitivity

of the receive signals, allowing for better margins

–

0.25 mA/ch Shutdown Mode

and reach.

–

–

Stable Operation Down to 1.8 mA/ch

USING ACTIVE IMPEDANCE

• Low Noise for Increased Receiver Sensitivity

–

3.2 nV/

√Hz Voltage Noise

–

1.5 pA/

√Hz Noninverting Current Noise

–

10 pA/

√Hz Inverting Current Noise

• Ideal for Full Rate ADSL Applications

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.

PowerPAD is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2002–2007, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.