AN11736 Maximum RF Input Power BGU6104 Rev. 1 — 10 September 2015 Application note Document information Info Content Keywords BGU6104, MMIC LNA, Maximum RF Input Power Abstract This document provides RF and DC test results by applying large RF input power. AN11736 NXP Semiconductors Maximum RF Input Power Test Revision history Rev Date Description 1 First publication 20150910 Contact information For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: [email protected] AN11736 Application note All information provided in this document is subject to legal disclaimers. Rev. 1 — 10 September 2015 © NXP B.V. 2015. All rights reserved. 2 of 10 AN11736 NXP Semiconductors Maximum RF Input Power Test 1. Introduction This document provides application examples and measurement results for large RF input signals using the BGU6104. 2. RF input power test on BGU6104 The test circuit shown in this document is using the BGU6104 and the input is matched between 1.8 – 2.2GHz (output is not matched). The Supply voltage is 4V and the bias current is set to 19.5mA via series resistor of 50 ohm (MMIC Vcc is 3V) The input power is swept at 2 GHz from -20dBm up to 20dBm and kept for 2 hours at 20dBm in gain (Venable = Vcc) and 2 hours in off mode (Venable = 0V) After the test with 20dBm input power at 2GHz (14.5dB input return loss) the MMIC is tested on the Network analyzer on functionality. AN11736 Application note All information provided in this document is subject to legal disclaimers. Rev. 1 — 10 September 2015 © NXP B.V. 2015. All rights reserved. 3 of 10 AN11736 NXP Semiconductors Maximum RF Input Power Test Fig 1. BGU6104 maximum RF input power test circuit +20dBm @ 2 GHz The input of the BGU6104 is matched on the test frequency (RL_in > 10dB), output is not matched. Additional resistor (R2) is used to reduce the current caused by self-biasing at large input power. AN11736 Application note All information provided in this document is subject to legal disclaimers. Rev. 1 — 10 September 2015 © NXP B.V. 2015. All rights reserved. 4 of 10 AN11736 NXP Semiconductors Maximum RF Input Power Test BOM BGA6104 input match at 2GHz COMPONENT Value Function C1 1.1pF matching C2 1.1pF matching C3 0.5pF matching C4 4.7nF decoupling C5 4.7nF decoupling C6 47pF dc-block L1 3.3nH matching L2 27nH bias R1 4k Rbias R2 50R Icc limit Fig 2. AN11736 Application note BGU6104 BOM for 2GHz input matching All information provided in this document is subject to legal disclaimers. Rev. 1 — 10 September 2015 © NXP B.V. 2015. All rights reserved. 5 of 10 AN11736 NXP Semiconductors Maximum RF Input Power Test 3. Test results with R2 = 50 ohm BGU6104 Pin vs Pout & Icc (Vsupply =4V ; Vcc=3V ; Icc= 19.5mA) Test frequency 1.9GHz Test frequency 2GHz Pin [dBm] Pout [dBm] Icc [mA] Vcc [V] Pout [dBm] Icc [mA] Vcc [V] -20 -4 19.5 3 -4.6 19.5 3 -15 0.9 19.5 3 0.3 19.5 3 -10 5.7 19.6 3 5.2 19.6 3 -6 9 19.8 3 -5 9.7 19.9 3 9.4 19.9 3 0 12.3 21.9 2.9 12.1 21.9 2.9 5 14.3 26 2.7 14.3 26.1 2.7 10 15.5 30.9 2.4 15.8 33.4 2.3 15 15.8 47.7 1.6 15.4 49.3 1.5 20 13.8 63.3 0.8 13.3 64.3 0.8 AN11736 Application note Fig 3. BGU6104 maximum RF input power versus Pout and Icc test results (P1dB in red) Fig 4. BGU6104 S-parameter before and after 2 hours +20dBm RF input power test All information provided in this document is subject to legal disclaimers. Rev. 1 — 10 September 2015 © NXP B.V. 2015. All rights reserved. 6 of 10 AN11736 NXP Semiconductors Maximum RF Input Power Test 4. Conclusion After 2 hours stress with 20dBm at RF input using the input matched BGU6104, no changes on S-parameter and DC-biasing observed. To minimize the self-biasing (increase of Icc) we recommend additional series resistor R2 at the Vsupply, for details see the test schematic Fig.1. In case of using the 50 ohm series resistors at the Vsupply and different control voltage at the Venable can lead to voltage difference between Vcc and Venable higher than 1.8V (Venable max. = Vcc + 1.8V) and internal ESD protection diodes can start to conduct. To protect the ESD diodes we recommend to use series resistor to limit the current on the Venable pin to max 20mA (5mA recommended) or limit the Venable voltage for gain mode to max. 2V (min. 1.2V) AN11736 Application note All information provided in this document is subject to legal disclaimers. Rev. 1 — 10 September 2015 © NXP B.V. 2015. All rights reserved. 7 of 10 AN11736 NXP Semiconductors Maximum RF Input Power Test 5. 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All rights reserved. 8 of 10 AN11736 NXP Semiconductors Maximum RF Input Power Test 6. List of figures Fig 1. Fig 2. Fig 3. Fig 4. BGU6104 maximum RF input power test circuit +20dBm @ 2 GHz ............................................. 4 BGU6104 BOM for 2GHz input matching ......... 5 BGU6104 maximum RF input power versus Pout and Icc test results (P1dB in red) .............. 6 BGU6104 S-parameter before and after 2 hours +20dBm RF input power test ............................ 6 AN11736 Application note All information provided in this document is subject to legal disclaimers. Rev. 1 — 10 September 2015 © NXP B.V. 2015. All rights reserved. 9 of 10 AN11736 NXP Semiconductors Maximum RF Input Power Test 7. Contents 1. 2. 3. 4. 5. 5.1 5.2 5.3 6. 7. Introduction ......................................................... 3 RF input power test on BGU6104....................... 3 Test results with R2 = 50 ohm ............................ 6 Conclusion ........................................................... 7 Legal information ................................................ 8 Definitions .......................................................... 8 Disclaimers......................................................... 8 Trademarks ........................................................ 8 List of figures....................................................... 9 Contents ............................................................. 10 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. 2015. 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: 10 September 2015 Document identifier: AN11736