160

140

120

100

80

60

40

20

0

10M

10G

Frequency(Hz)

100M

1G

OPA2180

OPA4180

www.ti.com

SBOS584C – NOVEMBER 2011 – REVISED DECEMBER 2012

APPLICATION INFORMATION

The OPAx180 family of operational amplifiers combine precision offset and drift with excellent overall

performance, making them ideal for many precision applications. The precision offset drift of only 0.085 µV/°C

provides stability over the entire temperature range. In addition, the device offers excellent overall performance

supplies require decoupling capacitors close to the device pins. In most cases, 0.1-µF capacitors are adequate.

OPERATING CHARACTERISTICS

The OPAx180 family of amplifiers is specified for operation from 4 V to 36 V (±2 V to ±18 V). Many of the

specifications apply from –40°C to +105°C. Parameters that can exhibit significant variance with regard to

operating voltage or temperature are presented in the Typical Characteristics.

EMI REJECTION

The OPAx180 uses integrated electromagnetic interference (EMI) filtering to reduce the effects of EMI

interference from sources such as wireless communications and densely populated boards with a mix of analog

signal chain and digital components. EMI immunity can be improved with circuit design techniques; the OPAx180

benefits from these design improvements. Texas Instruments has developed the ability to accurately measure

and quantify the immunity of an operational amplifier over a broad frequency spectrum extending from 10 MHz to

6 GHz. Figure 25 shows the results of this testing on the OPAx180. Detailed information can also be found in the

Application Report EMI Rejection Ratio of Operational Amplifiers (SBOA128), available for download from the TI

website.

Figure 25. OPAx180 EMIRR Testing

Copyright © 2011–2012, Texas Instruments Incorporated

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Product Folder Links: OPA2180 OPA4180