Datasheet

Single-Ended to Fully Differential Application

3-4

This application circuit has interaction between R

source

, R

termination

, and R

Texas Instruments has provided an engineer design utility to facilitate the

design of these circuits. Engineer design utilities are available on the

Amplifiers and Comparators section of the Analog and Mixed Signal portion

of the TI web page.

The designer should be aware that each individual feedback path is an invert-

ing path. There is no noninverting gain circuit for fully differential amps. The

designer should also be aware that the gain is affected by the open loop char-

acteristic of the FDA, the same assingle-ended op-amps. If there is sufficient

safety margin between the closed loop response and open loop response of

the FDA (40 dB or more), the error contribution from the open loop response

of the FDA is negligible and can be ignored.