THS6002

DUAL DIFFERENTIAL LINE DRIVERS AND RECEIVERS

SLOS202D– JANUARY 1998– REVISED JULY 1999

25

POST OFFICE BOX 655303

APPLICATION INFORMATION

power supply restrictions

Although the THS6002 is specified for operation from power supplies of

±5 V to ±15 V (or singled-ended power

supply operation from 10 V to 30 V), and each amplifier has its own power supply pins, several precautions must

be taken to assure proper operation.

1.

The power supplies for each amplifier must be the same value. For example, if the drivers use

±15 volts,

then the receivers must also use

±15 volts. Using ±15 volts for one amplifier and ±5 volts for another

amplifier is not allowed.

2.

To save power by powering down some of the amplifiers in the package, the following rules must be

followed.

the package is used. This is because the internal startup circuitry uses the power from the Receiver 1

device.

As an example, if only the two drivers within the THS6002 are used, then the package power is reduced by

The THS6002 incorporates a standard Class A-B output stage. This means that some of the quiescent current

is directed to the load as the load current increases. So under heavy load conditions, accurate power dissipation

calculations are best achieved through actual measurements. For small loads, however, internal power

dissipation for each amplifier in the THS6002 can be approximated by the following formula:

P

D ≅

2V

CC

I

CC )

V

CC

_V

O

V

O

R

L

Where:

= load resistance

To find the total THS6002 power dissipation, we simply sum up all four amplifier power dissipation results.

should be taken into account for low value feedback resistors.