STB5600

Supply Voltage - Max :
Supply Voltage - Min :
Maximum Power Dissipation :
Packaging : Tray
Operating Temperature Range : - 40 C to + 125 C
Operating Frequency : 20 MHz
Supply Current : 25 mA
Package / Case : LQFP-32


Features:

· ONE CHIP SYSTEM TO INTERFACE ACTIVE ANTENNA TO ST20GP1 MICROCONTROLLER
· COMPLETE RECEIVER USING NOVEL DUAL CONVERSION ARCHITECTURE WITH SINGLE IF FILTER
· MINIMUM EXTERNAL COMPONENTS
· COMPATIBLE WITH GPS L1 SPS SIGNAL
· INTERNALLY STABILISEDPOWER RAILS
· CMOS OUTPUT LEVELS
· FROM 3.3 TO 5.9V SUPPLY VOLTAGE
· TQFP32 PACKAGE

Application

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
-114dBmfor 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.

Pinout




Specifications

Symbol	Parameter	Value	Unit
VCC	DC Supply Voltage	5.9	V
RF+, RF-	DC Supply Voltage	8	dBm
Tj	Junct ion Temperature	150	°C
Tstg	Storage Temperature Range	-40 to 125	°C
Rthj-amb	Thermal Resistance Junction-ambient	80	°C/W

Description

The STB5600, using STMicroelectronics HSB2, High Speed Bipolar technology, implements a Global Positioning System RF front-end.

The chip STB5600 provides down conversion from the GPS (L1) signal at 1575 MHz via an IF of 20MHz to an output frequency of 4MHz suitable for ST20GP1 GPS processor.

STB5600 uses a single external reference oscillator to generate both RF local oscillator signals and the processor reference clock.