SE4120L
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 SE4120L 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 SE4120L features a conditioned
interface for software implementations of GNSS
baseband signal processing.
The SE4120L 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 SE4120L’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 SE4120L
requires only two passive components to implement an
off-chip loop filter.
The SE4120L is optimized for the lowest possible
power consumption consistent with a very low external
component count.
The SE4120L 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 (1.7 dB typ.)
Low 2.2 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
4 x 4 mm 24 pin QFN, RoHS-compliant package
Ordering Information
Part No.
SE4120L-R
Package
24 Pin QFN
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-00059
Rev 3.5
May-26-2009
1 of 2
SIGE [ SIGE SEMICONDUCTOR, INC. ]
