OPA186DBVT datasheet(19/48 Pages) TI1

19 / 48 page

7.3.4 EMI Rejection

The OPAx186 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 OPAx186

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 7-2 shows the results of this testing on the OPAx186. Table 7-1 lists the EMIRR +IN values for the

OPAx186 at particular frequencies commonly encountered in real-world applications. Table 7-1 lists applications

that can be centered on or operated near the particular frequency shown. See also the EMI Rejection Ratio of

Operational Amplifiers application report, available for download from www.ti.com.

Frequency (Hz)

100

125

150

175

10M

100M

10G

Figure 7-2. EMIRR Testing

Table 7-1. OPAx186 EMIRR IN+ for Frequencies of Interest

FREQUENCY

APPLICATION AND ALLOCATION

EMIRR IN+

400 MHz

Mobile radio, mobile satellite, space operation, weather, radar, ultra-high frequency (UHF)

applications

48.4 dB

900 MHz

Global system for mobile communications (GSM) applications, radio communication, navigation,

GPS (to 1.6 GHz), GSM, aeronautical mobile, UHF applications

52.8 dB

1.8 GHz

GSM applications, mobile personal communications, broadband, satellite, L-band (1 GHz to 2 GHz)

69.1 dB

2.4 GHz

802.11b, 802.11g, 802.11n, Bluetooth®, mobile personal communications, industrial, scientific and

medical (ISM) radio band, amateur radio and satellite, S-band (2 GHz to 4 GHz)

88.9 dB

3.6 GHz

Radiolocation, aero communication and navigation, satellite, mobile, S-band

82.5 dB

5 GHz

802.11a, 802.11n, aero communication and navigation, mobile communication, space and satellite

operation, C-band (4 GHz to 8 GHz)

95.5 dB

www.ti.com

OPA186, OPA2186, OPA4186

SBOS968C – JUNE 2022 – REVISED JULY 2023

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