AMC1350: Why does a differential signal still have an output without applying a bias voltage?

Tom Tom

Part Number: AMC1350

Tool/software:

Generally, when using differential signals as inputs, a bias voltage is required, such as a bias voltage of 0, in order to produce an output. Why does AMC1350 differential signal still have output without bias voltage?

8 months ago

0 Clemens Ladisch 8 months ago

Guru 317480 points

The AMC1350's inputs accept voltages between −4 V and 4 V, relative to GND1 (see the V_CM specification).

The AMC1350's output has a fixed bias of about 1.44 V (see the V_CMout specification).

0 Tom Tom 8 months ago in reply to Clemens Ladisch

Intellectual 430 points

https://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1419173/amc1350-application-issues

input not referred to ground, the input signal swings outside of the common-mode input voltage range！

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AMC1350: Why does a differential signal still have an output without applying a bias voltage?