redundant buffer circuit

Jan Bock

Hi Team,

My customer needs a solution for the redundant provision of BIAS voltages generated by DACs. The voltages generated by the DACs should be buffered by OP amps, then the signals should be combined to provide redundancy. Only one of the two buffers is supplied with power at a time. Can you help me with component selection (OP-amp for buffer) and circuit design?

Thanks

Jan

over 3 years ago

0 Raymond Zhang1 over 3 years ago

TI__Guru 55171 points

Hi Jan,

Can you help me with component selection (OP-amp for buffer) and circuit design?

Could you provide us the design requirements for the op amp as buffer configuration? The op amp requirements are:

1. Available power supply rails on the design (single or dual supply rails).

2. Amplitude of DAC signal, wave shape, and maximum operating frequency or BW of the DAC signal.

3. Op amp buffer's voltage offset requirements and/or noise requirements

4. Required bias voltage level, op amp driving current (load requirements)

5. Cost/price range and/or availability information (immediate need?)

You also mentioned that "Only one of the two buffers is supplied with power at a time.". Are two buffers identical per the design? --> which means you need two single packaged op amp for the application.

Once I have the above requirement information, I may be able to recommend a couple options for the application.

Best,

Raymond