THS6007 Datasheet, PDF (22/36 Pages) Texas Instruments – DUAL DIFFERENTIAL LINE DRIVERS AND LOW-POWER RECEIVERS

THS6007
DUAL DIFFERENTIAL LINE DRIVERS AND LOW-POWER RECEIVERS
SLOS334– DECEMBER 2000
APPLICATION INFORMATION
The THS6007 contains four independent operational amplifiers. Two are designated as drivers because of their
high output current capability, and two are designated as receivers. The receiver amplifiers are voltage feedback
topology amplifiers made for high-speed, low-power operation and are capable of driving output loads of at least
50 mA. The drivers are current feedback topology amplifiers and have been specifically designed to deliver the
full power requirements of ADSL. They can deliver output currents of at least 400 mA at full output voltage.
The THS6007 is fabricated using Texas Instruments 30-V complementary bipolar process, BiCOM. 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 driver amplifier and both receivers of the THS6007 have their 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.
However, with independent power supply pins for each device, the effects of crosstalk through common
impedance in the power supplies is more easily managed. This is because it is much easier to achieve low
common impedance on the PCB with copper etch than it is to achieve low impedance within the package with
either bond wires or metal traces on silicon.
22
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265