28

INA1650, INA1651

SBOS818A – DECEMBER 2016 – REVISED SEPTEMBER 2018

www.ti.com

Product Folder Links: INA1650 INA1651

Submit Documentation Feedback

Copyright © 2016–2018, Texas Instruments Incorporated

9 Power Supply Recommendations

The INA165x operates from ±2.25-V to ±18-V supplies while maintaining excellent performance. However, some

applications do not require equal positive and negative output voltage swing. With the INA165x, power-supply

voltages do not need to be equal. For example, the positive supply can be set to 25 V with the negative supply at

–5 V.

10 Layout

10.1 Layout Guidelines

For best operational performance of the device, use good printed circuit board (PCB) layout practices, including:

•

Connect low-ESR, 1.0-µF and 0.1-µF ceramic bypass capacitors between each supply pin and ground,

placed as close to the device as possible. Connecting bypass capacitors only from V+ to ground is

acceptable in single-supply applications. Noise can propagate into analog circuitry through the power pins of

this device. The bypass capacitors reduce the coupled noise by providing low-impedance pathways to

ground.

•

Connect the device REF pins to a low-impedance, low-noise, system reference point (such as an analog

ground or the VMID(OUT) pin) with the shortest trace possible.

•

Place the external components as close to the device as possible, as shown in Figure 63 and Figure 64.

•

Use ground pours and planes to shield input signal traces and minimize additional noise introduced into the

signal path.

•

Keep the length of input traces equal and as short as possible. Route the input traces as a differential pair

with as minimal spacing between them as possible.