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How to reduce a DAC gain
How to reduce a DAC gain
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Old 24th May 2017, 02:46 AM   #1
LoneL is offline LoneL  Malaysia
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Default How to reduce a DAC gain

Hello, I'm new here. An I have some gain issue of my Lampucera Maxi DAC. I think the gain is too high for my system. Here are some info for my DAC, The receiver chip CS8416, output chip is CS4397, BB2604 op-amp after the CS4397. My question is, is there any way to reduce the gain by changing some resistor after the CS4397? Hope some expert & guru will help of my DAC gain problem.

The attached schematics are something closer for CS8416+CS4397 connections. but not exactly my DAC design.
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Old 24th May 2017, 03:04 AM   #2
abraxalito is online now abraxalito  United Kingdom
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On the schematic you've shown, R15 and R16 can be increased in value to decrease the output voltage.
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Old 24th May 2017, 05:52 AM   #3
LoneL is offline LoneL  Malaysia
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I only know some very basic electronic knowledge. Currently the R15 & R16 is 22k ohm. I was thinking of reduce by -3db, any suggestion what resistor value to change? Thank you for helping.
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Old 24th May 2017, 06:27 AM   #4
abraxalito is online now abraxalito  United Kingdom
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Try 47k for R15/16.
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