OPA340 datasheet(20/46 Pages) TI2

20 / 46 page

Texas Instruments Incorporated

VIN

VOUT

N/C

–IN

+IN

V–

N/C

V+

OUTPUT

N/C

Use low-ESR, ceramic

bypass capacitor

GND

VS+

Run the input traces

as far away from

the supply lines

as possible

Place components

close to device and

to eachother to

reduce parasitic

errors

GND

VIN

GND

Use low-ESR,

ceramic bypass

capacitor

VS–

VOUT

OPA340, OPA2340, OPA4340

SBOS073C – SEPTEMBER 1997 – REVISED AUGUST 2016

www.ti.com

Product Folder Links: OPA340 OPA2340 OPA4340

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10 Layout

10.1 Layout Guidelines

Pay attention to good layout practices. Keep traces short and when possible, use a printed-circuit board (PCB)

ground plane with surface-mount components placed as close to the device pins as possible. Place a 0.1-μF

capacitor closely across the supply pins. Apply these guidelines throughout the analog circuit to improve

performance and provide benefits, such as reducing the electromagnetic interference (EMI) susceptibility.

Operational amplifiers vary in susceptibility to radio frequency interference (RFI). RFI can generally be identified

as a variation in offset voltage or DC signal levels with changes in the interfering RF signal. The OPA340 is

specifically designed to minimize susceptibility to RFI and demonstrates remarkably low sensitivity compared to

previous generation devices. Strong RF fields can still cause varying offset levels.

10.2 Layout Example

Figure 33. Layout Recommendation

Figure 34. Schematic Representation

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