OPA2990IDR datasheet(24/59 Pages) TI1

24 / 59 page

Frequency (Hz)

100

10M

100M

C004

OPA990, OPA2990, OPA4990

SBOS933D – FEBRUARY 2019 – REVISED JULY 2019

www.ti.com

Product Folder Links: OPA990 OPA2990 OPA4990

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Feature Description (continued)

7.3.2 EMI Rejection

The OPAx990 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 OPAx990 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 50 shows the results of this testing on the OPAx990. Table 2 shows the EMIRR IN+ values for the

OPAx990 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 as it

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

Figure 50. EMIRR Testing

Table 2. OPA990 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

59.5 dB

900 MHz

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

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

68.9 dB

1.8 GHz

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

77.8 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)

78.0 dB

3.6 GHz

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

88.8 dB

5 GHz

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

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

87.6 dB

OPA2990IDR Datasheet(PDF) 24 Page - Texas Instruments

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