Part Number: INA1620EVM Other Parts Discussed in Thread: TPA3126D2EVM , PCM2903EVM-U , , INA1620 Hi!
I am looking for a stereo pre amp EVM that can take analog audio input from the PCM2903EVM-U DAC, and function as a volume regulator, and send the signal…
Part Number: INA1620EVM Hi!
I have bought the INA1620EVM. The documentation can be found here: https://www.ti.com/lit/ug/sbou205/sbou205.pdf
But there is an error - a contradiction - on page 5 - Section 3.2 - Cutoff Frequency:
When you look at the 2 formulas…
OK. Thank you. I will have to adjust the volume before the TPA3126D2EVM power stage.
Considering that the signal comes from the PCM2903EVM-U DAC:
Do you have any recommendations for an amp stage before the TPA3126D2EVM to make the volume fully adjustable…
Part Number: INA1620EVM
1. R15=R20 is Not matched...
2. If we connect the IN- to GND,and Set R1=R7=1K ohm,R2=R6=2Kohm:
when using Equation (4), ,VRightChannelOutput = (1k/(2k+1k))*(1+2k/1k) * IN+ = 1* IN+
But using Equation (6) ,VRightChannelOutput = …
Part Number: INA1620EVM Hello,
I'm a bit confused. I replaced R1 & R7 with 1kohm resistors, and R2 & R6 with 10kohm resistors. I'm feeding the right channel audio input 1v. However I'm only getting 1.75v on the output, or 4.86db of gain. I thought with…
Hi Tamara,
That's not the question I was asking. But it was also very useful information so thank you. I'm pretty sure I'm doing things right by connecting my single ended source ground leg to both the ground and the inverting input pin. As my DAC is…
Now I have looked at the documentation for INA1620 and INA1651 (and INA1620EVM and INA1650EVM).
None of them really seem optimal. INA1620 only has 1 op amp in each channel instead of the 3 op amps of a 'real' instrumentation amplifier. And INA1651 (having…