The TLV904x 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 TLV904x 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 8-4 shows the results of this testing on the TLV904x. Table 8-1 shows the EMIRR IN+ values for the TLV904x 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.
|FREQUENCY||APPLICATION OR ALLOCATION||EMIRR IN+|
|400 MHz||Mobile radio, mobile satellite, space operation, weather, radar, ultra-high frequency (UHF) applications||60 dB|
|900 MHz||Global system for mobile communications (GSM) applications, radio communication, navigation, GPS (to 1.6 GHz), GSM, aeronautical mobile, UHF applications||70 dB|
|1.8 GHz||GSM applications, mobile personal communications, broadband, satellite, L-band (1 GHz to 2 GHz)||75 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)||79.0 dB|
|3.6 GHz||Radiolocation, aero communication and navigation, satellite, mobile, S-band||82 dB|
|5 GHz||802.11a, 802.11n, aero communication and navigation, mobile communication, space and satellite operation, C-band (4 GHz to 8 GHz)||85 dB|