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PDF STB5600 Data sheet ( Hoja de datos )
| Número de pieza | STB5600 | |
| Descripción | GPS RF FRONT-END IC | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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® STB5600
GPS RF FRONT-END IC
s ONE CHIP SYSTEM TO INTERFACE
ACTIVE ANTENNA TO ST20GP1
MICROCONTROLLER
s COMPLETE RECEIVER USING NOVEL
DUAL CONVERSION ARCHITECTURE WITH
SINGLE IF FILTER
s MINIMUM EXTERNAL COMPONENTS
s COMPATIBLE WITH GPS L1 SPS SIGNAL
s INTERNALLY STABILISED POWER RAILS
s CMOS OUTPUT LEVELS
s FROM 3.3 TO 5.9V SUPPLY VOLTAGE
s TQFP32 PACKAGE
DESCRIPTION
The STB5600, using STMicroelectronics HSB2,
High Speed Bipolar technology, implements a
Global Positioning System RF front-end.
The chip provides down conversion from thDe aGtaPSSheet4U.com
(L1) signal at 1575 MHz via an IF of 20MHz to an
output frequency of 4MHz suitable for ST20GP1
GPS processor.
It uses a single external reference oscillator to
generate both RF local oscillator signals and the
processor reference clock.
TQFP32
MARKING:
STB5600
TRACEAB. CODE
ASSY CODE
PIN CONNECTION (top view)
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ELECTRICAL CHARACTERISTICS (Continued)
OUTPUT SECTION
Symb ol
P a ram et er
IVCCDRIVE Supply Current
VOH High output voltage
VOL Low output volt age
tr Rise Time
tf Fall Time
Note
VVCCDRIVE = 3 V
Vp = VVCCDRIVE = 3 V
Vn = GNDDRIVE
CLOAD = 7 pF
CLOAD = 7 pF
STB5600
Min.
Vp-0.4
Vn
Typ .
8
6
2
M ax.
Vp
Vn +0. 4
Unit
mA
V
V
ns
ns
APPLICATION CIRCUIT
A typical application circuit is shown in figure 1. The RF input from the antenna downlead is fed via a
ceramic filter and matching circuit to the RF+,RF- pins. The external LNA in the antenna should have
between 10 and 35dB of amplifier gain, so the noise measured in a one MHz bandwidth should be
-114dBm for kTB in 1 MHz
+ 2dB LNA noise figure
+10/35 dB LNA gain (net)
Total -102/ 77dBm at connector.
Allowing 2dB for filter loss, -104/-79 is available at the matching circuit.
et4U.com
Fig. 1 Typical Application Circuit
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| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet STB5600.PDF ] | |
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