SBOS859B March 2018 – July 2018 INA1620
The inclusion of a ground (GND) pin in the INA1620 architecture allows the internal enable circuitry to be referenced to the system ground, eliminating the need for level shifting circuitry in many applications. The internal amplifier compensation capacitors are also referenced to this pin, greatly increasing the ac PSRR. For highest performance, connect the GND pin to a low-impedance reference point with minimal noise present. As shown in Figure 46, the GND pin is protected by ESD diodes to the amplifier power supplies. Do not connect the GND pin to voltages outside the limits defined in the Specifications section.