SE4120S
GNSS Receiver IC
Applications
Dual-mode GPS and Galileo receivers
Software-defined GNSS radio systems
High sensitivity / low power GNSS / A-GNSS apps.
Portable navigation devices, mobile phones, and
GNSS peripheral devices
Telematics equipment
Product Description
The SE4120S is a highly-integrated GNSS radio front
end IC offering high performance and low power
operation in a wide range of low-cost applications. It
supports GPS and dual-mode L1-band GPS/Galileo
products.
The SE4120S features a conditioned
interface for software implementations of GNSS
baseband signal processing.
The SE4120S includes an on-chip LNA, a low IF
receiver with a linear AGC and an advanced multi-bit
I/Q analog to digital converter (ADC) with serialized
data output. The receiver incorporates a fully integrated
image reject mixer, obviating the need for a SAW filter
in many applications. The SE4120S’s on-chip IF filter
may be adjusted from 2.2 MHz BW (for GPS only) to
4.4MHz BW (for simultaneous reception of Galileo and
GPS signals). The digitized I/Q output, centered near-
zero IF, is available in a serialized data stream to
facilitate software signal processing.
The highly-integrated PLL synthesizer of the SE4120S
requires only two passive components to implement an
off-chip loop filter.
The SE4120S is optimized for the lowest possible
power consumption consistent with a very low external
component count.
The SE4120S incorporates current-controlled low-
spurious output buffers which may be run from a
separate external supply to interface to low voltage
systems. Output buffers supply sufficient current to
drive most baseband devices directly.
Features
Single conversion L1-band GPS/Galileo radio with
integrated IF filter
2-bit serialized digital I/Q output at near-zero IF
Integrated LNA with high-gain (18.5 dB typ.) and
low NF (1.65 dB typ.)
Very low 2.15 dB typ. RF system noise figure
Low 10 mA operating current with 2.7-3.6 V supply;
8 mA with internal LNA disabled
Low standby current 3
μA
typical
Fully integrated VCO and resonator
Integrated PLL supporting 16.368 MHz reference
frequency
I/O supply range extends down to 1.7 V
2.2 x 2.2 x 0.35 mm, 46 pad, 250um pitch, SnAg
solder bump, RoHS-compliant package
Ordering Information
Part No.
SE4120S-R
Package
46-Pad Chip-Scale
Package
Remark
Shipped in Tape
& Reel
Functional Block Diagram
Optional
filter
LNA_OUT
MIX_IN
VAGC
IF Filter
AGC
Controller
-45°
AGC_DIS
Buffer
LNA
~
~
~
I
Q
FILT_BW
DATA_OUT
ADC
Data
Downconverter /
Serializer
Sample
Clock
divider
+45°
SYNC
LNA_IN
CLK_OUT
Quadrature
÷2
VCO
Feedback
Divider
FILT_BW
Fs_SEL1
Chip
Control
SE4120
~
Phase/Frequency
Detector
Reference
Divider
Fs_SEL0
RX_EN
OSC_EN
~
VTUNE
PLL Loop
Filter
Reference
Oscillator
/ Buffer
RVI
XTAL1/
TCXO IN
XTAL2
DST-00118
Rev 4.3
May-26-2009
1 of 2
SE4120S
GNSS Receiver IC
http://www.sige.com
Email: sales@sige.com
Customer Service Locations:
North America:
1050 Morrison Drive, Suite 100
Ottawa ON K2H 8K7 Canada
Phone: +1 613 820 9244
Fax: +1 613 820 4933
Hong Kong
Phone: +852 3428 7222
Fax: +852 3579 5450
San Diego
Phone: +1 858 668 3541 (ext. 226)
Fax: +1 858 668 3546
United Kingdom
Phone: +44 1279 464217
Fax: +44 1279 464201
Product Preview
The datasheet contains information from the product concept specification. SiGe Semiconductor, Inc. reserves the right to change
information at any time without notification.
Preliminary Information
The datasheet contains information from the design target specification. SiGe Semiconductor, Inc. reserves the right to change
information at any time without notification.
Production testing may not include testing of all parameters.
Information furnished is believed to be accurate and reliable and is provided on an “as is” basis. SiGe Semiconductor, Inc. assumes
no responsibility or liability for the direct or indirect consequences of use of such information nor for any infringement of patents or
other rights of third parties, which may result from its use. No license or indemnity is granted by implication or otherwise under any
patent or other intellectual property rights of SiGe Semiconductor, Inc. or third parties. Specifications mentioned in this publication
are subject to change without notice. This publication supersedes and replaces all information previously supplied. SiGe
Semiconductor, Inc. products are NOT authorized for use in implantation or life support applications or systems without express
written approval from SiGe Semiconductor, Inc.
Copyright 2009 SiGe Semiconductor, Inc.
All Rights Reserved
DST-00118
Rev 4.3
May-26-2009
2 of 2
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