6.3.3 EMI Rejection

The TL103WB uses integrated electromagnetic interference (EMI) filtering to reduce the effects of EMI from

sources such as wireless communications (radio frequency interference - RFI) and densely-populated boards

with a mix of analog signal chain and digital components. EMI immunity can be improved with circuit design

techniques; the TL103WB 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 10MHz to 6GHz. Figure 6-1 shows the results of this testing on the TL103WB.

Table 6-1 shows the EMIRR IN+ values for the TL103WB 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)

30

40

50

60

70

80

90

1M

10M

100M

1G

Figure 6-1. EMIRR Testing

Table 6-1. TL103WB EMIRR IN+ for Frequencies of Interest

FREQUENCY

APPLICATION OR ALLOCATION

EMIRR IN+

400MHz

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

applications

62dB

900MHz

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

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

75dB

1.8GHz

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

70dB

2.4GHz

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

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

65dB

3.6GHz

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

88dB

5GHz

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

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

71dB

6.4 Device Functional Modes

This device has one mode of operation that applies when operated within the recommended operating

conditions.

www.ti.com

TL103W, TL103WA, TL103WB

SLOS437R – APRIL 2004 – REVISED APRIL 2024

Copyright © 2024 Texas Instruments Incorporated

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