Texas Instruments THS4502EVM, Руководство пользователя

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Single-Ended to Fully Differential Application
3-4
This application circuit has interaction between R
source
, R
termination
, and R
g
.
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.