VCC (+ve supply) and VEE (-ve supply) required for op-amps are connected at banana jack J2, J3 and J4. This is passed through pi filter and low noise LDO TPS7A47 (+12 V) and TPS7A3301RGWT (-12 V) as shown in Figure 5-7 to get noise free power for the op-amps used for the filter.

TPS7A47 and TPS7A33 are designed for high-accuracy and high-precision instrumentation applications where clean voltage rails are critical to maximize system performance. For applications where positive and negative high-performance rails are required, consider using these high voltage, ultra low noise, and low dropout linear regulators.