Ina217-drv134

argonrepublic · 9th February 2010, 07:36 AM

Am I missing something? Do I need an opamp? I just wired up an INA217 to a DRV134. Both seem to be working OK but I am not getting enough gain. I ran a synthesizer to pin 4 of DRV134 and got a differential output. I then ran the synthesizer into the + and - of the INA217 input and showed more gain but not enough to pick up microphone.

janneman · 9th February 2010, 07:40 AM

Quote:

Originally Posted by argonrepublic

Am I missing something? Do I need an opamp? I just wired up an INA217 to a DRV134. Both seem to be working OK but I am not getting enough gain. I ran a synthesizer to pin 4 of DRV134 and got a differential output. I then ran the synthesizer into the + and - of the INA217 input and showed more gain but not enough to pick up microphone.

Circuit diagram? What gain did you use? Did you use a mic preamp? Does the synth deliver line-level output voltage?

jd

argonrepublic · 9th February 2010, 08:26 AM

I found the problem. one of my caps was bad. At first try, this is a nice pair. I only used a dynamic mic because I don't have phantom yet. Just INA217 into a DRV134 and I have smoother sound than a preamp which cost $150.

9th February 2010, 07:36 AM	#1
argonrepublic diyAudio Member Join Date: Apr 2005 Location: Simcoe Ont	Ina217-drv134 Am I missing something? Do I need an opamp? I just wired up an INA217 to a DRV134. Both seem to be working OK but I am not getting enough gain. I ran a synthesizer to pin 4 of DRV134 and got a differential output. I then ran the synthesizer into the + and - of the INA217 input and showed more gain but not enough to pick up microphone.

9th February 2010, 08:26 AM	#3
argonrepublic diyAudio Member Join Date: Apr 2005 Location: Simcoe Ont	Ina217 I found the problem. one of my caps was bad. At first try, this is a nice pair. I only used a dynamic mic because I don't have phantom yet. Just INA217 into a DRV134 and I have smoother sound than a preamp which cost $150.

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