THS6022

250-mA DUAL DIFFERENTIAL LINE DRIVER

SLOS225C – SEPTEMBER 1998 – REVISED JANUARY 2000

21

POST OFFICE BOX 655303

APPLICATION INFORMATION

simplified schematic

IN+

IN–

VCC+

VCC–

OUT

Ibias

Ibias

The THS6022 contains two independent operational amplifiers. These amplifiers are current feedback topology

amplifiers made for high-speed operation. They have been specifically designed to deliver the full power

requirements of ADSL and therefore can deliver output currents of at least 200 mA at full output voltage.

The THS6022 is fabricated using Texas Instruments 30-V complementary bipolar process, HVBiCOM. This

process provides excellent isolation and high slew rates that result in the device’s excellent crosstalk and

extremely low distortion.

independent power supplies

Each amplifier of the THS6022 has its own power supply pins. This was specifically done to solve a problem

that often occurs when multiple devices in the same package share common power pins. This problem is

crosstalk between the individual devices caused by currents flowing in common connections. Whenever the

current required by one device flows through a common connection shared with another device, this current,

in conjunction with the impedance in the shared line, produces an unwanted voltage on the power supply. Proper

power supply decoupling and good device power supply rejection helps to reduce this unwanted signal. What

is left is crosstalk.