SE4100L
GPS Receiver IC
Applications
Mobile phone & PDA accessories
Portable navigation and personal security
Security systems
Asset tracking
Telematics equipment
Product Description
The SE4100L is an integrated GPS receiver designed
to receive the L1 signal at 1575.420 MHz. The receiver
has a low IF architecture and integrates all of the
amplifier, oscillator, mixer and IF sampling functions.
The high level of integration reduces the external
component count to just 14 passives in addition to
power supply de-coupling and a 16.368 MHz crystal.
Furthermore, elimination of the need for an external
VCO resonator and RF filter reduces the critical off-chip
RF circuitry to just three matching components to
achieve optimum noise match at the LNA input.
Combined with the 4x4 mm LPCC package, this results
in a very small circuit footprint with no need for electrical
screening in many applications.
The SE4100L’s small size and BOM requirement is
complemented by just 35 mW typical operating power
consumption. Digitally controlled shutdown modes
enable the 16.368 MHz clock signal to the baseband
processor to be maintained separately from operation of
the rest of the receiver.
A switchable gain LNA enables the SE4100L to be used
with either a local passive antenna or with a remote
active antenna without changing the circuit
configuration. An image reject mixer downconverts the
RF signal to a 4.092 MHz IF. The integrated IF filter
feeds a combiner, limiter and output latch. The output
signal is a 1-bit quantized 4.092 MHz digital IF.
Features
35mW typical power consumption
Single conversion radio with integrated IF filters
On-chip, gain switchable LNA
Low LNA noise figure, 1.9 dB typ.
On chip crystal oscillator can be powered
up independently
Fully integrated VCO, resonator and PLL
Remote antenna current detection
4x4 mm 24 pin QFN - Pb Free and RoHS
compliant package
Ordering Information
Type
SE4100L-R
Package
24 Pin QFN
Remark
Shipped in
Tape & Reel
Functional Block Diagram
LowGain
LNAOut
MixIn
RF Amp
Mixers
IF Filter
LNAIn
LNA
AntOK
AntDetP
AntDetN
Xtal1
Ant current
monitor
Phase
Det.
÷96
I
Q
~
~
~
+45° / -45°
Quadrature
÷2
Phase
Shift /
Combiner
Σ
D
Clk
Q
DataOut
~
Xtal2
Xtal
Oscillator
RxEnb
OscEnb
Vtune
~
VCO
D-type
27-DST-02
Rev 2.4
May-26-2009
ClkOut
1 of 2
SIGE [ SIGE SEMICONDUCTOR, INC. ]
