INA1650: Balanced input to single-ended output?

Gregory Duperon

Expert 6900 points

Part Number: INA1650

How should we handle unused channels? Ground the pins?

In addition, is it possible to use the chip to take a balanced input and convert to a single-ended output?

Thanks.

over 6 years ago

0 Alex Davis over 6 years ago

TI__Expert 7260 points

Hi Gregory,
Both inputs on the unused channel should be tied to ground (or mid-supply in a single-supply application) for best performance. INA1650 is a differential line receiver, so can certainly be used to convert a balanced input to a single ended output. Figure 52 in the datasheet shows an example circuit using INA1650 as a receiver for a balanced input on an XLR connection.

0 Abed Yassine over 6 years ago in reply to Alex Davis

Intellectual 255 points

Hello Alex,

I asked Greg the questions on figure 52 are out A and Out single ended

0 Abed Yassine over 6 years ago in reply to Alex Davis

Intellectual 255 points

Alex one more question: the unused input should be tied VMID(out) or VMID(IN)

0 Alex Davis over 6 years ago in reply to Abed Yassine

TI__Expert 7260 points

Hi Abed,
The unused inputs could be tied to GND if the INA1650 is used in a split-supply configuration (as shown in figure 52). In a single supply configuration (as shown in figure 59), the unused inputs should be tied to Vmid(out).

Both outputs (Out A and Out B) are single-ended outputs.

0 Dennis Goeke over 6 years ago in reply to Alex Davis

TI__Genius 11135 points

Abed

We haven't heard back from you so we assume this answered your questions. If not, just post another reply below.

Thanks
Dennis

0 Abed Yassine over 6 years ago in reply to Dennis Goeke

Intellectual 255 points

Hello Dennis, I am all set for now. Thank you very much

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INA1650: Balanced input to single-ended output?