NXP Semiconductors BGU8007 GPS LNA EVB User manual

UM10497
User manual for the BGU8007 GPS LNA evaluation board
Rev. 1.0 — 5 October 2011
User manual
Document information
Info
Content
Keywords
LNA, GPS, BGU8007
Abstract
This document explains the BGU8007 GPS low noise amplifier evaluation
board
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NXP Semiconductors
UM10497
BGU8007 GPS LNA EVB
UM10497
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
User manual
Rev. 1.0 — 5 October 2011
2 of 16
Contact information
For additional information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddress[email protected]
Revision history
Rev
Date
Description
1.0
20111005
First Release.
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NXP Semiconductors
UM10497
BGU8007 GPS LNA EVB
UM10497
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
User manual
Rev. 1.0 — 5 October 2011
3 of 16
1. Introduction
NXP Semiconductors’ BGU8007 is a low-noise amplifier for GPS receiver applications in
a plastic, leadless 6 pin, extremely thin small outline SOT886 package. It has a current of
4.6 mA, a gain of 19 dB and a noise figure of 0.75 dB [1]. It has superior linearity
performance to suppress interference and noise from co-habitation cellular transmitters
while retaining sensitivity.
The LNA has been designed using NXP Semiconductors’ advanced 180 GHz fT SiGe:C
process. The BGU8007 only requires two external components, one series inductor for
input matching and one decoupling capacitor. The BGU8007 contains one RF stage and
internal bias that is temperature stabilized. It is also supplied with an enable function
allowing it to be controlled by a logic signal.
The BGU8007 is ideal for use as GNSS LNA in smart phones, feature phones and
Portable Navigation Devices.
The GPS LNA evaluation board (EVB), see Fig 1, is designed to evaluate the
performance of the BGU8007 applied as a GPS LNA. In this document, the application
diagram, board layout, bill of materials, and typical results are given, as well as some
explanations on GPS related performance parameters like out-of-band input third-order
intercept point, gain compression under jamming and noise under jamming.
Fig 1. BGU8007 GPS LNA evaluation board
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NXP Semiconductors
UM10497
BGU8007 GPS LNA EVB
UM10497
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
User manual
Rev. 1.0 — 5 October 2011
4 of 16
2. General description
NXP Semiconductors’ BGU8007 low noise amplifier is dedicated for the GNSS frequency
band (GPS, GLONASS and Galileo positioning systems). The integrated biasing circuit is
temperature stabilized, which maintains a constant current over temperature. It also
enables the superior linearity performance of the BGU8007. It is also supplied with an
enable function that allows it to be controlled with a logic signal. In disabled mode it
consumes less than 1 µA.
The output of the BGU8007 is internally matched for 1575.42 MHz whereas only one
series inductor at the input is needed to achieve the best RF performance. Both the input
and output are AC coupled via an integrated capacitor.
Only two external components are required to build a GPS LNA with the following
advantages:
 Low noise;
 High gain;
 High linearity under jamming;
 Very low package height 0.5mm;
 Low current consumption;
 Short power settling time;
The data sheet of the BGU8007 is available, and it is called “SiGe:C Low Noise Amplifier
MMIC for GPS, GLONASS and Galileo”
3. Application Board
The BGU8007 GPS LNA evaluation board simplifies the evaluation of the BGU8007 GPS
LNA for the GNSS applications. The evaluation board enables testing of the device
performance and requires no additional support circuitry. The board is fully assembled
with the BGU8007, including the input series inductor as well as a decoupling capacitor
to optimize the performance. The board is supplied with two SMA connectors for input
and output connection to RF test equipment. The BGU8007 can operate from a 1.5 V to
2.2 V single supply and consumes about 4.6mA.
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NXP Semiconductors
UM10497
BGU8007 GPS LNA EVB
UM10497
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
User manual
Rev. 1.0 — 5 October 2011
5 of 16
3.1 Application Circuit
The circuit diagram of the evaluation board is shown in Fig 2.
With jumper JU1 the enable pin can be controlled to either to Vcc or GND.
Fig 2. Circuit diagram of the BGU8007 evaluation board
3.2 Board Layout
Fig 3. Printed circuit board lay-out of the BGU8007 GPS LNA evaluation board
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