PGA2311: How do I change the dynamic range -95.5 to +35.5 dB to be -40 to +18 dB ?

Marvin Cantos

Expert 6960 points

Part Number: PGA2311

Hi Team,

Good day. I am posting this inquiry on behalf of the customer.

"How do I change the dynamic range from -95.5 to +35.5 dB to -40 to +18 dB ?"

Please help to advise. Thank you for extending your support.

Kind regards,

Marvin

over 3 years ago

0 Luis Chioye over 3 years ago

TI__Guru 55466 points

HI Marvin,

The PGA2311 covers a wide gain range of -95.5dB to +31.5dB in 0.5dB steps, which encompasses the gain range requirement of -40dB to +18dB.

Is the gain step of 0.5dB too large in the Customer application?

Thank you and Regards,

Luis

0 Andy Peters over 3 years ago

Genius 3945 points

Constrain the gain changes in software, in whatever microcontroller is used to send the control messages to the chip over SPI?

0 Luis Chioye over 3 years ago in reply to Andy Peters

TI__Guru 55466 points

Hi Andy,

Correct, the PGA2311 is programmable via SPI in 0.5dB steps, so the user can program the gain level required as long as it is inside the range. The device offers a wide gain range of -95.5dB to +31.5dB in 0.5dB steps, which encompasses the gain range of -40dB to +18dB.

Thank you and Regards,

Luis

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PGA2311: How do I change the dynamic range -95.5 to +35.5 dB to be -40 to +18 dB ?