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Partno	Mfg	Dc	Qty	Available	Descript
BGC420E6327	INFINEON	N/a	3000	avai	MMIC, LNA

BGC420E6327 ,MMIC, LNABGC420Self-Biased BFP420567

BGC420E6327
MMIC, LNA
BGC420
Description
The BGC420 is a silicon self biased RF Transistor (Q1). It offers an adjustable collector current
nearly independent from device voltage in the range from 2.0V to 4.5V. Additionally a control pin
(Vc) for switching the device off is provided. The collector current can be adjusted by connecting a
resistor (Rx) between Vcc and Vr.
Self-Biased BFP420 SIEGET25- Technology Small SCT598-PackageControl Pin For Switching The Device OffCurrent Easy Adjustable By An External ResistorVoltage Independent Current (2V – 4.5V)
ESD: Electrostatic discharge sensitive device, observe
handling precautions!
Pin Connections, SCT598
Vr,5
RFout,6
GND,7
Vc, 8
4,Vcc
3, Vb
2, GND
1,RFin
Note: Top View
VPW059823
BGC420
Maximum Ratings
Thermal Resistance
1)TS is measured on the Ground lead at the soldering point to the pcb.
Electrical Specifications (Measured in Test Fixture applying the circuit specified in Figure 1
with Rx=82W), Tc=25°C, Vcc=3V, ICC£7mA unless noted A positive sign denotes a current flowing form the Pin into the external circuit. This values are valid for C2=1nF, C3=100pF and 220pF Coupling capacitors at RFin and RFout.
BGC420
Power Gain
versus Frequency
Vcc=3V, Icc=5mA
Gma
Gms
¥S21¥2
GHz
Icc
Gma
Gms
Power Gain
versus Device Current
Vcc=3V
¥S21¥2
S212
versus Frequency and Temperature
Vcc=3V, Icc=7mA
GHz
0.2 0.6 1 1.4 1.8 2.2 2.6 3
0.111046810121416
BGC420
Icc
Vcc
Device Current
versus Rx and Temperature
Vcc=3V3
Device Current
versus Voltage at Vc
Vcc=3V; Rx=82W
Icc
VVc1234
Device Current
versus Device Voltage250450650
Icc
BGC420
Typical Application
Remarks:
1) To provide low frequency stability C2 should be 10 times C3.
2) Be aware that also coupling capacitors determine the switching times.
3) The collector current at Q1 can be estimated by Ic=0.6V / Rx[W].Place C2 as close to the device as possible.
Vc,8Vb,3off
C2, 1nF
3V,
DC
C4,150pFC5,100nF
Figure 1. Typical Application and Internal Circuit
BGC420
Layout Proposal
Part List for Vcc=3V, ICC£7mA
This proposal demonstrates how to use the BGC420 as a Self-Biased Transistor. As for a discrete Transistor
matching circuits have to be applied. A good starting point for various applications are the Application Notes
provided for the BFP420.

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