Other Parts Discussed in Thread: TLV9104
we are using THS4531 to amplify differential signal. but it is observed that output is always stuck to the power rails.
gain of the circuit is configured as 2 (RF: 100K and RG:50K) and the input signals are sinusoidal signals with rails between 1.75 and 3.25 V.
It is also observed that a mere power on of the IC is making outputs reach rail.
We have added an input buffer stage with TLV9104 (configured as unity gain buffer), before the amplifier section. and EMI filter after the amplifier (lowpass).
results are in simulation are good (proper amplified output), but test results have output stuck to rails.
Are we doing something incorrectly? is there an issues with impedance mismatch (requiring termination)?
We have tried different output loads and always output is stuck to rail, is there some impact due to type of load?
