9.1 Application Information

Figure 61 shows the basic connections required for device operation. Good layout practice mandates that bypass capacitors are placed as close to the device pins as possible.

The INA827 output is referred to the output reference (REF) pin, which is normally grounded. This connection must be low-impedance to assure good common-mode rejection. Although 5 Ω or less of stray resistance can be tolerated when maintaining specified CMRR, small stray resistances of tens of ohms in series with the REF pin can cause noticeable degradation in CMRR.

1.

NOINDENT:

This resistor is optional if the input voltage remains above [(V–) – 2 V] or if the signal source current drive capability is limited to less than 3.5 mA. See the Input Protection section for more details.

Figure 61. Basic Connections