Tool/software:
Hello everyone.
I'm working on the project with EEG measurements device with battery power supply, so I want to make a pre-amplifier circuit before ADC input (Analog device AD7177-2).
I looked in the forum and saw that this topic:
e2e.ti.com/.../ina333-signal-amplification-with-ina333-before-feeding-to-ads1291
And I intend to use with INA333 and have some point unclearly.
1./ Does need a filter before INA333? If yes, please recommend the type of filter.
2/ The different signal of electrodes can be positive or negative in the range +/-100uV.
So, Will need config INA333 in dual-power supply mode? ( intend with same power supply of ADC, ~ +/-2.5V)
3./ The battery( 3.7V lithium or coin cell) for power supply need buck/boost converter to make the low noise regulator of +/-2.5V, +3V3.
So, please recommend the TI's low noise buck boost and LDO, VREF ICs.
Thanks.