AN11390 BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass Rev. 2 — 16 March 2016 Application note Document information Info Content Keywords BGU7224, 2.4 GHz LNA, 2.4-2.5 GHz ISM, WiFi (WLAN) Abstract This document provides circuit schematic, layout, BOM and typical evaluation board performance for a 2.4 GHz WiFi (WLAN) LNA AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass Revision history Rev Date Description 2 20160316 Chapter 5 “Thermal info” added 1 20141003 First publication Contact information For additional information, please visit: http://www.nxp.com For sales office addresses, please send an email to: [email protected] AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 2 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 1. Introduction The BGU7224 is a fully integrated MMIC Low Noise Amplifier (LNA) for wireless receiver applications in the 2.4 GHz to 2.5 GHz ISM band. Manufactured using NXP’s high performance SiGe:C technology, the BGU7224 couples best-in-class gain, noise figure, linearity and efficiency with the process stability and ruggedness that are the hallmarks of SiGe technology. The BGU7224 features a robust temperature-compensated internal bias network and an integrated bypass / shutdown feature that stabilizes the DC operating point over temperature and enables operation in the presence of high input signals, while minimizing current consumption in bypass (standby) mode. The 1.6 mm x 1.6 mm footprint, with only two external components (a decoupling capacitor at the Vcc pin, and an optional shunt inductor for impedance matching at RF input pin), makes the BGU7224 the smallest 256 QAM WLAN LNA with bypass solution on the market, ideal for space sensitive applications. Key Benefits: Fig 1. AN11390 Application note Fully integrated, high performance LNA with built-in bypass Exceptional 1.0 dB noise figure with 13 mA current consumption Extremely low bypass current (<2 µA) Single supply 3.0 V to 3.6 V operation Integrated, temperature stabilized bias network High IIP3 and low EVM High ESD protection of 2 kV (HBM) on all pins Ultra small, 0.5 mm pitch, 1.6 x 1.6 x 0.5 mm QFN-style package, MSL 1 at 260⁰C Compliant to Directive 2002/95/EC, regarding Restriction of Hazardous Substances (RoHS) following NXP’s RHF-2006 indicator D (dark green) BGU7224 Block Diagram All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 3 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 2. Design and Application The overall intent of this application note is to demonstrate the performance of the BGU7224 in a 2.4 GHz LNA application e.g. 802.11 b/g/n “MIMO” WiFi (WLAN) applications up to 256 QAM. Key requirements for this type of WLAN application are gain, noise figure, linearity, input and output return loss, and turn on/off time. The BGU7224 itself is a fully integrated MMIC consisting of an internal temperature compensated bias network, an RF Gain block, bypass mode functionality, ESD protection, internal RF matching, and internal DC blocking. Only two external components, a 4.7 nF DC-decoupling capacitor and an optional 8.2 nH shunt inductor for matching at RF input is necessary. The BGU7224 can be also used without the matching inductor at the RF_IN, but then the input return loss will be degraded by ~2 dB at 2.4 GHz ! The 2.4 GHz WiFi LNA evaluation board simplifies the evaluation of the BGU7224 application. The evaluation board enables testing of the device performance and requires no additional support circuitry. The board is fully assembled with the BGU7224 MMIC, and includes the 4.7 nF DC-decoupling capacitor and the 8.2 nH input matching inductor. The board is also supplied with two SMA connectors for input and output connection to RF test equipment. A 50 ohm “through line” is provided at the top of the evaluation board in case the user wishes to verify RF connector and grounded coplanar wave guide losses for deembedding purposes. AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 4 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass Fig 2. AN11390 Application note BGU7224 Evaluation Board 2.4 GHz WiFi LNA EVB All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 5 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 2.1 Application Circuit Schematic Fig 3. BGU7224 Evaluation Board: Schematic Note: Figure 3 is the schematic for BGU7224 evaluation board, only two external components (matching shunt inductor on RF_IN and DC-decoupling capacitor, placed near the VCC pin). The BGU7224 can be also used without the matching inductor at the RF_IN, but then the input return loss will be degraded by ~2 dB at 2.4 GHz! 2.2 PCB Layout AN11390 Application note - Use controlled impedance lines (50 Ω) for RF_in & RF_out - Place the decoupling capacitor as close as possible to the device pin 6 (Vcc) - Proper grounding of the RF GND especially pin 7 (ground pad) is essential for good RF-performance. Connect the GND pins direct to ground plane and use through vias on ground pad (size and amount depends on the technology used) All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 6 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 2.3 Board Layout AN11390 Application note Fig 4. BGU7224 Evaluation Board Fig 5. BGU7224 Stack of the PCB material All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 7 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 2.4 Application Board Bill-Of-Material Table 1. BGU7224 2.4 GHz WiFi LNA Part List Customer can choose their preferred vendor but should be aware that the performance could be affected. “0402” case size passives are used on NXP’s evaluation board. Item Position on Layout Reference (Fig 2) Type Vendor Value 1 Z1 BGU7224 BGU7224 NXP SEMICONDUCTORS BGU7224 2 Z2 GRM155 Murata 4.7nF 3 RF_IN LQP15 X1, X2 Murata Emerson Network Power 8.2nH 3 CON-SMA-1 4 X3 C1 Shunt Inductor RF_IN, RF_OUT Vcc/LNA gain/bypass Molex CON-3PIN 3. Typical Application Board Test Result This section presents the results of a typical BGU7224 as used in NXP’s Application Circuit. Unless otherwise noted, all measurement references are at the SMA connectors on the evaluation board. 3.1.1 S-Parameters Figures 6 and 7 below show the broadband (10 MHz – 10 GHz) and narrowband s-parameters for the BGU7224 respectively. Figure 8 shows the measured stability factor from 1 GHz – 20 GHz. AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 8 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 20 15 10 5 0 -5 S-Parameters -10 (dB) -15 -20 -25 S21 Measured S11 Measured -30 S22 Measured -35 S12 Measured -40 0 1 2 3 4 5 6 7 8 9 10 Frequency (GHz) Fig 6. BGU7224 Broadband S-Parameters VCC = 3.3V 25C ambient AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 9 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 20 15 10 S21 Measured 5 S11 Measured 0 S-Parameters (dB) S22 Measured S12 Measured -5 -10 -15 -20 -25 -30 2.4 2.41 2.42 2.43 2.44 2.45 2.46 2.47 2.48 2.49 2.5 Frequency (GHz) Fig 7. BGU7224 Narrowband S-Parameters VCC = 3.3V 25C ambient AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 10 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass K Factor 100 10 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Frequency (GHz) Fig 8. BGU7224 Broadband K Factor (Rollett Stability Factor) VCC = 3.3V 25C ambient AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 11 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 3.1.2 S-Parameters in Bypass Mode Figure 9 and 10 below shows the gain, input return loss, and output return loss of the BGU7224 in bypass mode. 0 -5 -10 S-Parameters -15 (dB) -20 S21 Measured S11 Measured -25 S22 Measured -30 0 1 2 3 4 5 6 7 8 9 10 Frequency (GHz) Fig 9. BGU7224 Broadband S-Parameters Bypass Mode Vcc = 3.3V 25C ambient AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 12 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 0 -5 S21 Measured S11 Measured S-Parameters -10 (dB) S22 Measured -15 -20 2.4 2.41 2.42 2.43 2.44 2.45 2.46 2.47 2.48 2.49 2.5 Frequency (GHz) Fig 10. BGU7224 Narrowband S-Parameters Bypass Mode Vcc = 3.3V 25C ambient AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 13 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 3.1.3 Noise Figure The noise figure is physically measured at the SMA connectors of the evaluation board. The total loss of the connectors and the printed circuit board are 0.3dB at 2.4 GHz (RF_IN to RF_OUT). After de-embedding the connector and PCB losses (0.15dB at 2.4 GHz) to the device pins, the noise figure is less than 0.8 dB at 2.4 GHz. Figure 11 below shows both the noise figure at the EVB level and the de-embedded noise figure. 1.4 1.3 1.2 NF 1.1 (dB) 1 Noise Figure [dB] EVB Level 0.9 Noise Figure [dB] De-Embedded 0.8 2.40 2.41 2.42 2.43 2.44 2.45 2.46 2.47 2.48 2.49 2.50 Frequency (GHz) Fig 11. BGU7224 Noise Figure VCC = 3.3V 25C ambient AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 14 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 3.1.4 Small Signal Linearity in Gain mode Figure 12 shows the input-referred IP3 level for the BGU7224, measured with 5 MHz tone spacing, -25 dBm input power per tone, and a swept center frequency from 2.4 GHz to 2.5 GHz. 8 7 iIP3 6 (dBm) 5 4 2.40 2.41 2.42 2.43 2.44 2.45 2.46 2.47 2.48 2.49 2.50 Frequency (GHz) Fig 12. BGU7224 Swept input-IP3 5MHz Tone Spacing Pin=-25dBm/Tone VCC = 3.3V 25C ambient AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 15 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 3.1.5 Large Signal Linearity in Gain mode Figure 13 shows the input referred P1dB level from 2.4 GHz to 2.5 GHz. 0 -1 -2 iP1dB (dBm) -3 -4 -5 2.40 2.41 2.42 2.43 2.44 2.45 2.46 2.47 2.48 2.49 2.50 Frequency (GHz) Fig 13. BGU7224 input-P1dB vs. frequency AN11390 Application note VCC = 3.3V 25C ambient All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 16 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass Figure 14 shows error vector magnitude (EVM) as a function of output power. Specifically, these data are captured using a 256 QAM OFDM waveform MSC9-VHT40. Note that the output power is the average power over the burst. 4 3 EVM (%) 2 EVM 2422 MHz 1 EVM 2462 MHz 0 -10 -8 -6 -4 -2 0 2 4 Output Power (dBm) Fig 14. BGU7224 EVM vs. burst average output power MCS9-VHT40 VCC = 3.3V 25C ambient AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 17 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 3.1.6 Out-of-band spurious In order to characterize the BGU7224 under potential jamming conditions, a 2.462 GHz signal is applied to the evaluation board at an RF input power level of -30 dBm. A second tone is applied at 5.180 GHz and swept over a range of input power levels. The 5.180 GHz “leakage” and the second order intermodulation product at 2.718 GHz are measured. The measurement set-up is shown in Figure 15. As a function of the 5.180 GHz jammer input level, Figure 16 reports the 5.180 GHz jammer output level, the 2.718 GHz IMD2 output level, and the 2.462 GHz Gain. Fig 15. Out-of-band suppression test setup AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 18 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 16 0 15 -5 -10 14 -15 13 2462 MHz Gain (dB) -20 12 -25 11 -30 10 -35 2462 MHz Gain 9 2718 MHz IMD2 POUT -40 5180 MHz Jammer POUT -45 8 2718 MHz IMD2 and 5180 MHz Jammer POUT (dBm) -50 7 -55 6 -60 -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 5180 MHz Jammer PIN (dBm) Fig 16. BGU7224 5180 MHz Jammer Level at Output, 2718 MHz IMD2 and 2462 MHz Gain vs. Jammer Input Power VCC = 3.3V 25C ambient 2.462 GHz input at -30 dBm AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 19 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 3.1.7 Harmonics By applying large RF signals at the input during bypass mode (OFF mode) operation, harmonics can be created by the LNA and then emanate from its RF input. In a real operating environment, these harmonic signals can be re-emitted by the antenna. The measurement set up used for characterizing the harmonics generated by the BGU7224 in bypass mode is shown in Figure 17. A 2.447 GHz signal is used for the measurement results shown in Figure 18. Fig 17. Harmonic test setup AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 20 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass -40 2nd Harmonic CW -50 3rd Harmonic CW (Noise floor -73dBm) 2nd Harmonic WFM1 -60 3rd Harmonic WFM1 (Noise floor -73dBm) Harmonic Level (dBm/1 MHz) -70 -80 0 1 2 3 4 5 6 7 8 9 10 Average Input Power Level (dBm) (1) CW – Continuous Wave (only for test / comparison) (2) WFM1 - 802.11b 1 Mbps (DBPSK) (worst case signal) Fig 18. BGU7224 (Bypass Mode) 2nd and 3rd Reflected Harmonic Levels 2.447 GHz Fundamental AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 21 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 3.1.8 LNA Turn ON-OFF Time The following diagram shows the setup to test LNA Turn ON and Turn OFF time. The waveform generator is set to square wave mode and the output amplitude at 3.3V peak with 50Ω output impedance. The RF signal generator output level is -20dBm at 2.45 GHz. It is very important to minimize or compensate for the time delay skew between the trigger signal and the detector signal. Also note that the scope input impedances are set to 50Ω on both channels. Fig 19. LNA Turn On and Turn Off time test setup AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 22 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 3.1.8.1 LNA Turn ON Time Figure 20 below shows a screen capture from an oscilloscope used to record the turn on time of the BGU7224. 100Hz 0/3.3V Square Wave, applied on Venable pin, measured from 50% of input pulse to 90% of maximum output power Fig 20. BGU7224 Turn On Time AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 23 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 3.1.8.2 LNA Turn OFF Time Figure 21 below shows an oscilloscope screen capture with the turn off time for the BGU7224. 100Hz 0/3.3V Square Wave, applied on Venable pin, measured from 50% of input pulse to 10% of maximum output power Fig 21. BGU7224 Turn Off Time AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 24 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 4. Summary of the Typical Evaluation Board Test Result Table 2. Typical results measured on the BGU7224 2.4 GHz WiFi LNA Evaluation Board with 8.2 nH matching inductor at the RF_IN Operating frequency 2.4-2.5 GHz, testing at 2.4 GHz and 2.5 GHz in Gain mode unless otherwise specified, Temp = 25°C. Unless noted, all measurements are done with SMA-connectors as reference plane. Parameter Symbol Value Unit Supply Voltage VCC 3.3 V Supply Current ICC 12.5 mA ByPass Current Noise Figure [1] Power Gain Input Return Loss Output Return Loss Reverse Isolation Ibypass 1.2 μA @ 2.4 GHz NF 1.00 dB @ 2.5 GHz NF 1.05 dB @ 2.4 GHz Gp 15.4 dB @ 2.5 GHz Gp 14.9 dB @ 2.4 GHz IRL 11.5 dB @ 2.5 GHz IRL 13.0 dB @ 2.4 GHz ORL 13.5 dB @ 2.5 GHz ORL 11.0 dB @ 2.4 GHz ISLrev -22.1 dB @ 2.5 GHz ISLrev -22.2 dB Power Gain @ 2.4 GHz Gp -5.6 dB (bypass mode) @ 2.5 GHz Gp -5.6 dB Input Return Loss @ 2.4 GHz IRL 14.5 dB (bypass mode) @ 2.5 GHz IRL 14.3 dB Output Return Loss @ 2.4 GHz ORL 17.9 dB (bypass mode) @ 2.5 GHz ORL 16.5 dB Input Third Order Intercept Point Two Tones: @ 2.4 GHz IIP3 34.8 dBm @ 2.5 GHz IIP3 34.6 dBm @ 2.4 GHz OIP3 29.2 dBm @ 2.5 GHz OIP3 29.0 dBm @ 2.4 GHz iP1dB -2.9 dBm @ 2.5 GHz iP1dB -2.5 dBm @ 2.4 GHz oP1dB 11.5 dBm @ 2.5 GHz oP1dB 11.4 dBm @2.4 GHz EVM 1.2 % 5 MHz Tone Spacing Power: 0 dBm/tone (bypass mode) Output Third Order Intercept Point Two Tones: 5 MHz Tone Spacing Power: 0 dBm/tone (bypass mode) Input 1dB Gain Compression Point Output 1dB Gain Compression Point Error Vector Magnitude AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 25 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass Parameter Symbol Value Unit Pout = 0dBm (256 QAM, MSC9-40) @ 2.5 GHz EVM 1.4 % Input Third Order Intercept Point @ 2.4 GHz IIP3 6.1 dBm @ 2.5 GHz IIP3 6.3 dBm @ 2.4 GHz OIP3 21.5 dBm @ 2.5 GHz OIP3 21.2 dBm -1 dBm Two Tones: 5 MHz Tone Spacing power: -25 dBm/tone Output Third Order Intercept Point Two Tones: 5 MHz Tone Spacing power: -25 dBm/tone 1dB input/output cross-compression with jammer @2462 MHz with 5180 MHz Jammer Harmonics generated at RF input Pin = 7 dBm (2.447 GHz) 2.H. @ 4.894 GHz H2 -50 dBm CW signal input 3.H. @ 7.341 GHz H3 -59 dBm Stability ( 1 - 20 GHz) K >1 LNA Turn ON/OFF Time Ton 120 nS Toff 20 nS (bypass mode) [1] AN11390 Application note PCB and connector losses excluded. All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 26 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 5. Thermal info The following temperature simulations are done based on the BGU7224 soldered onto the NXP evaluation board (see Fig. 22) in still air and 85 C ambient temperature. Part number BGU7224 JCbot [1] 250 K/W JB [2] 274 K/W JC [3] Maximum Junction Temperature Ta 101 C 85 C 180 K/W [1] Thermal resistance from junction to exposed diepad [2] Thermal resistance from junction to board [3] Thermal characterization parameter junction to package top Fig 22. BGU7224 reference position board temperature AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 27 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 6. Legal information 6.1 Definitions Draft — The document is a draft version only. The content is still under internal review and subject to formal approval, which may result in modifications or additions. NXP Semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information. 6.2 Disclaimers Limited warranty and liability — Information in this document is believed to be accurate and reliable. However, NXP Semiconductors does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. In no event shall NXP Semiconductors be liable for any indirect, incidental, punitive, special or consequential damages (including - without limitation lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. Notwithstanding any damages that customer might incur for any reason whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards customer for the products described herein shall be limited in accordance with the Terms and conditions of commercial sale of NXP Semiconductors. Right to make changes — NXP Semiconductors reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. This document supersedes and replaces all information supplied prior to the publication hereof. Suitability for use — NXP Semiconductors products are not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical systems or equipment, nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage. NXP Semiconductors accepts no liability for inclusion and/or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and/or use is at the customer’s own risk. Applications — Applications that are described herein for any of these products are for illustrative purposes only. NXP Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Customers are responsible for the design and operation of their applications and products using NXP Semiconductors products, and NXP Semiconductors accepts no liability for any assistance with applications or customer product design. It is customer’s sole responsibility to determine whether the NXP Semiconductors product is suitable and fit for the customer’s applications and products planned, as well as for the planned application and use of customer’s third party customer(s). Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products. customer’s applications or products, or the application or use by customer’s third party customer(s). Customer is responsible for doing all necessary testing for the customer’s applications and products using NXP Semiconductors products in order to avoid a default of the applications and the products or of the application or use by customer’s third party customer(s). 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The foregoing limitations, exclusions and disclaimers shall apply to the maximum extent permitted by applicable law, even if any remedy fails of its essential purpose. 6.3 Licenses Purchase of NXP <xxx> components <License statement text> 6.4 Patents Notice is herewith given that the subject device uses one or more of the following patents and that each of these patents may have corresponding patents in other jurisdictions. <Patent ID> — owned by <Company name> 6.5 Trademarks Notice: All referenced brands, product names, service names and trademarks are property of their respective owners. <Name> — is a trademark of NXP B.V. NXP Semiconductors does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 28 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 7. List of figures Fig 1. Fig 2. Fig 3. Fig 4. Fig 5. Fig 6. Fig 7. Fig 8. Fig 9. Fig 10. Fig 11. Fig 12. Fig 13. Fig 14. Fig 15. Fig 16. Fig 17. Fig 18. Fig 19. Fig 20. Fig 21. Fig 22. BGU7224 Block Diagram .................................. 3 BGU7224 Evaluation Board 2.4 GHz WiFi LNA EVB ................................................................... 5 BGU7224 Evaluation Board: Schematic .......... 6 BGU7224 Evaluation Board ............................. 7 BGU7224 Stack of the PCB material ............... 7 BGU7224 Broadband S-Parameters VCC = 3.3V 25C ambient .......................................... 9 BGU7224 Narrowband S-Parameters VCC = 3.3V 25C ambient ........................................ 10 BGU7224 Broadband K Factor (Rollett Stability Factor) VCC = 3.3V 25C ambient............... 11 BGU7224 Broadband S-Parameters Bypass Mode Vcc = 3.3V 25C ambient ................... 12 BGU7224 Narrowband S-Parameters Bypass Mode Vcc = 3.3V 25C ambient ................... 13 BGU7224 Noise Figure VCC = 3.3V 25C ambient ........................................................... 14 BGU7224 Swept input-IP3 5MHz Tone Spacing Pin=-25dBm/Tone VCC = 3.3V 25C ambient15 BGU7224 input-P1dB vs. frequency VCC = 3.3V 25C ambient ........................................ 16 BGU7224 EVM vs. burst average output power MCS9-VHT40 VCC = 3.3V 25C ambient ..... 17 Out-of-band suppression test setup ................ 18 BGU7224 5180 MHz Jammer Level at Output, 2718 MHz IMD2 and 2462 MHz Gain vs. Jammer Input Power VCC 2.462 GHz input at = 3.3V 25C ambient 30 dBm............................................................ 19 Harmonic test setup ........................................ 20 BGU7224 (Bypass Mode) 2nd and 3rd Reflected Harmonic Levels 2.447 GHz Fundamental ..... 21 LNA Turn On and Turn Off time test setup ..... 22 BGU7224 Turn On Time ................................. 23 BGU7224 Turn Off Time ................................. 24 BGU7224 reference position board temperature ........................................................................ 27 AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 29 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 8. List of tables Table 1. Table 2. BGU7224 2.4 GHz WiFi LNA Part List ............. 8 Typical results measured on the BGU7224 2.4 GHz WiFi LNA Evaluation Board with 8.2 nH matching inductor at the RF_IN ...................... 25 AN11390 Application note All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 March 2016 © NXP B.V. 2016. All rights reserved. 30 of 31 AN11390 NXP Semiconductors BGU7224 Low Noise Amplifier (256 QAM) 2.4 GHz WiFi LNA MMIC with Bypass 9. Contents 1. 2. 2.1 2.2 2.3 2.4 3. 3.1.1 3.1.2 3.1.3 3.1.4 3.1.5 3.1.6 3.1.7 3.1.8 3.1.8.1 3.1.8.2 4. 5. 6. 6.1 6.2 6.3 6.4 6.5 7. 8. 9. Introduction ......................................................... 3 Design and Application....................................... 4 Application Circuit Schematic ............................. 6 PCB Layout ........................................................ 6 Board Layout ...................................................... 7 Application Board Bill-Of-Material ...................... 8 Typical Application Board Test Result .............. 8 S-Parameters ..................................................... 8 S-Parameters in Bypass Mode......................... 12 Noise Figure ..................................................... 14 Small Signal Linearity in Gain mode ................ 15 Large Signal Linearity in Gain mode ................ 16 Out-of-band spurious ....................................... 18 Harmonics ........................................................ 20 LNA Turn ON-OFF Time .................................. 22 LNA Turn ON Time .......................................... 23 LNA Turn OFF Time ......................................... 24 Summary of the Typical Evaluation Board Test Result ................................................................. 25 Thermal info ....................................................... 27 Legal information .............................................. 28 Definitions ........................................................ 28 Disclaimers....................................................... 28 Licenses ........................................................... 28 Patents ............................................................. 28 Trademarks ...................................................... 28 List of figures..................................................... 29 List of tables ...................................................... 30 Contents ............................................................. 31 Please be aware that important notices concerning this document and the product(s) described herein, have been included in the section 'Legal information'. © NXP B.V. 2016. All rights reserved. For more information, visit: http://www.nxp.com For sales office addresses, please send an email to: [email protected] Date of release: 16 March 2016 Document identifier: AN11390