GuenterL

Re: ADA4891-1W schematic review at ADV7393 DAC output

Discussion created by GuenterL Employee on Aug 20, 2013
Latest reply on Aug 20, 2013 by Steven.yang@analog.com
Branched from an earlier discussion

The recommended schematic for non-inverting gain has positive and negative power rails on the op-amp.  The reason for this with the op--amp VSS tied to ground , the op-amp will have problems driving the output signal to ground.  The reference schematic show the rails being +-2.5V.  Setting them to +3.3V and negative 1-2V would work fine. 

 

ADA4891 Figure 61 shows a single supply non-inverting video buffer.

 

All power must be very clean, Gain resistors must be close to op-amp and very clean.

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