10 Power Supply Recommendations

The nominal performance of the INA848 is specified with a supply voltage of ±15 V and midsupply reference

voltage. The device operates using power supplies from ±4 V (8 V) to ±18 V (36 V) and non-midsupply reference

voltages with excellent performance.

CAUTION

Supply voltages higher than 40 V (±20 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

For best operational performance of the device, use good PCB layout practices, including:

• Take care to make sure that both input paths are well-matched for source impedance and capacitance to

avoid converting common-mode signals into differential signals.

• Noise propagates into analog circuitry through the power pins of the circuit as a whole and of the device.

Bypass capacitors 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 +VS to ground is applicable for single-

supply applications.

• To reduce parasitic coupling, run the input traces as far away from the supply or output traces as possible. If

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

parallel with the noisy trace.

• Place the external components (filter components, load) as close to the device as possible.

• Use ground layer to minimize the parasitic inductance of the board.

• Keep the traces as short as possible.

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INA848

SBOS946 – SEPTEMBER 2020

Copyright © 2020 Texas Instruments Incorporated

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