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TPA6304-Q1: What is the IN_M Voltage?

Part Number: TPA6304-Q1
Other Parts Discussed in Thread: TAS5414

Gregg,

I've married the TPA6304 EVM board to my recently-minted "break-out board".  

I might have made a design mistake assuming that TPA6304's IN_M voltage rail is ~3.3VDC as the earlier TAS5414 was. 

But I'm measuring IN_M at 2.6VDC under the load of a 10M ohm scope probe. 

Is this correct? 

The IN_M voltage is significant to me because I bring it into my board, buffer it with a high impedance input unity gain stage, and then bias all of my pre-TPA6304 circuitry around the buffered voltage.

Thanks.

Jim Olson

Indianapolis, IN US