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Part Number: TMS320F28377S
Hi C2K champs!
Customer is developing PCB with F28377S and is looking for best fit for ref voltage (REF3030) buffer for 4 ADC modules.
They found OPA320 for REF3030 in User’s Guide of LAUNCHXL-F28377S:
In e2e TI referenced to OPA320 in https://e2e.ti.com/support/microcontrollers/c2000/f/171/t/521504?ADC-VREFHI-settings-for-F28377-with-ref3030
Question: Do we recommend a 4 channel OPA for cost/PCB space reasons as voltage follower ?
Thanks for support!
The only difference between 2 x 2 channel or 1 x 4 channel is going to be cost/area, so select the OPA320 part that makes the most sense from this perspective (probably the 1 x 4-channel); usually the Vos matching within a multi-channel package isn't really much better than between packages because each channel is trimmed independently.
Also note that the TRM shows an example of using 1 OPA320 channel per 2 VREFHI inputs. This is also acceptable, although the performance will be slightly lower. In this case you'd probably us a single 2 channel OPA320.
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