OPA992 datasheet(20/51 Pages) TI

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7.3.2 EMI Rejection

The OPAx992-Q1 uses integrated electromagnetic interference (EMI) filtering to reduce the effects of EMI 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 OPAx992-Q1 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 7-3 shows the results of this testing on the OPAx992-Q1. Table 7-1 provides the EMIRR IN+

values for the OPAx992-Q1 at particular frequencies commonly encountered in real-world applications. The EMI

Rejection Ratio of Operational Amplifiers application report contains detailed information on the topic of EMIRR

performance relating to op amps and is available for download from www.ti.com.

Frequency (Hz)

100

110

120

10M

100M

D012

Figure 7-3. EMIRR Testing

Table 7-1. OPAx992-Q1 EMIRR IN+ For Frequencies of Interest

FREQUENCY

APPLICATION OR ALLOCATION

EMIRR IN+

400 MHz

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

applications

50.0 dB

900 MHz

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

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

56.3 dB

1.8 GHz

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

65.6 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)

70.0 dB

3.6 GHz

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

78.9 dB

5 GHz

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

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

91.0 dB

OPA992-Q1, OPA2992-Q1, OPA4992-Q1

SBOSAC9D – AUGUST 2022 – REVISED APRIL 2023

www.ti.com

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