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OPA189IDGKT Datasheet(PDF) 21 Page - Texas Instruments |
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OPA189IDGKT Datasheet(HTML) 21 Page - Texas Instruments |
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21 / 44 page  + ± Low-Pass Filter 50 Digital Multimeter Ambient temperature: 25Û& Sample / Averaging +V -V Not shown: 0.1 µF and 10 µF supply decoupling RF source DC Bias: 0 V Modulation: None (CW) Frequency Sweep: 201 pt. Log Copyright © 2016, Texas Instruments Incorporated 0 20 40 60 80 100 120 10M 100M 1G 10G Frequency (Hz) C005 21 OPA189, OPA2189 www.ti.com SBOS830C – SEPTEMBER 2017 – REVISED OCTOBER 2018 Product Folder Links: OPA189 OPA2189 Submit Documentation Feedback Copyright © 2017–2018, Texas Instruments Incorporated Feature Description (continued) Figure 39. EMIRR Testing Table 2. OPAx189 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 8.3.5 EMIRR +IN Test Configuration Figure 40 shows the circuit configuration for testing the EMIRR +IN. An RF source is connected to the op amp noninverting input terminal using a transmission line. The op amp is configured in a unity-gain buffer topology with the output connected to a low-pass filter (LPF) and a digital multimeter (DMM). A large impedance mismatch at the op amp input causes a voltage reflection; however, this effect is characterized and accounted for when determining the EMIRR IN+. The multimeter samples and measures the resulting DC offset voltage. The LPF isolates the multimeter from residual RF signals that may interfere with multimeter accuracy. Figure 40. EMIRR +IN Test Configuration |
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