Hi there,
I'm looking at the potential use of the OPA1632 fully differential amplifier as a line driver from a DAC output to my external amplifiers. Ideally setup to provide unity gain as per Figure 12 in the data sheet with both R(g) and Rf set to 390R.
Section 9 of the datasheet suggests that this device can be driven from a single +12 Vdc power supply. If this is so, can you please explain to me how I connect the V- and V+ pins for the device?
Kind regards,
Mark
Hello Mark,
Section 9 on power recommendation is a good section to look at for this type of information. Another section would be on amplifier' recommended operating condition.
You should be able to use a single power supply range between 5 and 30V, so +12V will work for this device. Below, is a schematic + simulation on the most optimal configuration for a single supply application. It is best to set the Vocm (Output common-mode control voltage pin) to mid-supply (read section 8.1.1, I recommend connecting this pin for better noise performance, but leaving it floating is valid as well). This will ensure the amplifier is achieving the max output voltage dynamic.
You can set this to any value within its range, but be aware to not violate the output swing of the device.
Thank you,
Sima
