POPA2186DDFT datasheet(17/41 Pages) TI

17 / 41 page

7.3.4 EMI Rejection

The OPA2186 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

OPA2186 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 OPA2186. Table 7-1 lists the EMIRR +IN

values for the OPA2186 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. OPA2186 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

OPA2186

SBOS968A – JUNE 2022 – REVISED SEPTEMBER 2022

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