10 Power Supply Recommendations

The nominal performance of the INA823 is specified with a supply voltage of ±15 V and midsupply reference

voltage. The device also operates using power supplies from ±1.35 V (2.7 V) to ±18 V (36 V) and non-midsupply

reference voltages with excellent performance. Parameters that can vary significantly with operating voltage and

reference voltage are shown in Section 7.6.

CAUTION

Supply voltages higher than 60 V (±30 V) can permanently damage the device. Parameters that vary

over supply voltage or temperature are shown in Section 7.6 of this data sheet.

11 Layout

11.1 Layout Guidelines

Attention to good layout practices is always recommended. For best operational performance of the device, use

the following PCB layout practices:

• Make sure that both input paths are well-matched for source impedance and capacitance to avoid converting

common-mode signals into differential signals.

• Use bypass capacitors to reduce the coupled noise by providing low-impedance power sources local to the

analog circuitry.

– Connect low-ESR, 0.1-µF ceramic bypass capacitors between each supply pin and ground, placed as

close to the device as possible. A single bypass capacitor from V+ to ground is applicable for single-

supply applications.

• Route the input traces as far away from the supply or output traces as possible to reduce parasitic coupling. If

these traces cannot be kept separate, crossing the sensitive trace perpendicular is much better than crossing

in parallel with the noisy trace.

• Place the external components as close to the device as possible.

• Use short, symmetric, and wide traces to connect the external gain resistor to minimize capacitance

mismatch between the RG pins.

• Keep the traces as short as possible.

INA823

SBOSA75A – JULY 2021 – REVISED JULY 2021

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