BGC405
Self-Biased BFP405
l
l
l
l
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SIEGET25- Technology
Small SCT598-Package
Control Pin For Switching The Device Off
Current Easy Adjustable By An External Resistor
Voltage Independent Current (2V – 4.5V)
8
7
6
5
2
1
3
4
VPW05982
ESD: Electrostatic discharge sensitive device, observe
handling precautions!
Type
Marking
BGC405
Ordering Code
(8-mm taped)
Q62702-G0091
40s
Equivalent Circuit
Pin Configuration Package
(circuit Diagram)
SCT598
see below
Pin Connections, SCT598
Vcc
Vc
Active
Bias
Circuit
Vr
RFout
Vb
Q1
Vr,5
4,Vcc
RFout,6
3, Vb
GND,7
2, GND
Vc, 8
1,RFin
Note: Top View
RFin GND
Description
The BGC405 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.
High Frequency Products
1
Edition A13, 06/00
BGC405
Maximum Ratings
Parameter
Symbol
Device current
ICC
Vcc
Ptot
Vc
Ir
Device voltage
Total power dissipation, Ts ≤
120°C
1)
Control voltage
Input Current for pin 1
Tj
TA
Tstg
Junction temperature
Ambient temperature range
Storage temperature range
Thermal Resistance
Junction-soldering point
Unit
1)
12
mA
4.5
V
54
mW
Vcc+0.5
V
380
µA
150
°C
-65...+150
°C
-65...+150
°C
≤
Rth JS
530
K/W
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=82Ω), Tc=25°C, Vcc=3V, ICC≈7mA unless noted
Symbol Parameter
Gp
Power Gain (S21 )
2
f=900MHz
Unit
Min
Typ
dB
19.5
16.5
21
18
1.8
2.0
1
0.5
15
15
5
8
1.5
3
3.7
2.5
<10
35
-60
f=1.8GHz
NF
Noise Figure (in 50Ω System)
f=900MHz
dB
f=1.8GHz
P-1dB
IP3
RLin
Output Power at 1dB Gain Compression f=900MHz
(in 50Ω System)
f=1.8GHz
Third Order Intercept Point
f=900MHz
(Output,ΓOpt)
f=1.8GHz
Input Return Loss
f=900MHz
dBm
dBm
dB
f=1.8GHz
RLout
Output Return Loss
f=900MHz
dB
f=1.8GHz
ton
toff
Ileak
IVcOn
IVcOff
Vcmin
Vcmax
2)
3)
3)
µs
µs
µA
µA
nA
V
V
On Switching Time
3)
Off Switching Time
Leakage Current In Sleep Mode
2)
Controll Pin (Vc) Current in Active Mode
2)
Controll Pin (Vc) Current in Sleep Mode
Minimum Voltage at Vc for Sleep Mode
Maximum Voltage at Vc for Active Mode
Max
2.1
2.3
Vcc - 0.3V
0V+0.3V
A positive sign denotes a current flowing form the Pin to the external circuit.
This values are valid for C2=1nF, C3=100pF and 220pF Coupling capacitors at RFin and RFout.
High Frequency Products
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Edition A13, 06/00
BGC405
Power Gain
versus Frequency
Vcc=3V, Icc=5mA
Power Gain
versus Device Current
Vcc=3V
30
50
45
dB
25
f=1 GHz
dB
40
2 GHz
Gms
35
20
Gma 30
Gms
2
S21 25
Gma
Gms
3 GHz
15
4 GHz
5 GHz
Gma
20
IS21I2
6 GHz
10
15
10
5
5
0
0
0.1
10
1
0
2
4
6
8
10
GHz
12
mA
f
Icc
S21
versus Frequency and Temperature
Vcc=3V, Icc=7mA
2
28
26
dB
J =
24
22
-40°C
J = +27
°C
20
S21
2
18
°C
J = +85
16
14
12
10
0.2
0.6
1
1.4
1.8
2.2
2.6
3
GHz
f
High Frequency Products
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Edition A13, 06/00
14
BGC405
Device Current
versus Rx and Temperature
Vcc=3V
Device Current
versus Device Voltage
14
12
mA
mA
12
10
Rx=56W
10
8
Icc
Icc
Rx=82W
6
-40°C
J =
6
Rx=120W
4
8
°C
J = +27
4
2
0
2
°C
J = +85
Rx=680W
1
2
3
V
0
50
4
Vcc
250
450
Ω
Rx
Device Current
versus Voltage at Vc
Vcc=3V; Rx=82Ω
8
7
mA
6
5
Icc
4
3
2
1
0
1
3
2
V
VVc
High Frequency Products
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Edition A13, 06/00
650
BGC405
Typical Application
Vcc,4
3V, DC
D1
C4,150pF C5,100nF
Rx
Vr,5
R2 (500R)
C3, 100pF
D2
Q2
L1,100nH
RFout,6
R1 (47k)
R4 (2k7)
Q1
R3
10k
Vc,8
Vb,3
Rx = 82Ohm for Icc=7.2mA
RFin,1
GND,7,2
C2, 1nF
off
on
Figure 1. Typical Application and Internal Circuit
Remarks:
1)
2)
3)
4)
To provide low frequency stability C2 should be 10 times C3.
Be aware that also coupling capacitors determine the switching times.
The collector current at Q1 can be estimated by Ic=0.6V / Rx[Ω].
Place C2 as close to the device as possible.
High Frequency Products
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Edition A13, 06/00
BGC405
Layout Proposal
9F
LQ
BGC405
C7
C2
C4
C5
C6
L1
C3
Rx
9
%*&
Figure 2. Layout Proposal
Part List for Vcc=3V, ICC≈7mA
Component Value
Comment
L1
100nH
RFC
C2
1nF
Compensation Capacitor for Low Frequency Stabilization
C3
100pF
RFC
C4
150pF
Blocking Capacitor
C5
100nF
Blocking Capacitor
C6
220pF
Coupling Capacitor
C7
220pF
Coupling Capacitor
Rx
82Ω
Current Adjust
Substrate
h=0.5mm
Fr4,εr=4.5
BGC405
This proposal demonstrates how to use the BGC405 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 BFP405.
High Frequency Products
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Edition A13, 06/00
BGC405
SPICE Model
The following SPICE Listing describes the circuit shown in figure 3. It is valid for low frequencies. For
frequencies above 100MHz the parasitic circuit elements noted in figure 4 and table 1 should be added.
Vcc
V1
X3
Rx
2
Vr
R2
C3
X4
3
X2
L1
RFout
R1
R4
C6
Q1
Rout
R3
Vc,4
Vb
V2
C2
RFin
GND
C7
vin
Rin
Figure. 3: Circuit used in the SPICE File
* Preliminary SPICE Model for BGC405
.PARAM R=82
** Analysis setup **
*.TRAN 2ns 15u 0 2n
.TEMP +27 -40 +85
.DC LIN V1 0V 4V 0.1V
*.DC LIN V2 0V 3V 0.1V
*.STEP PARAM R LIST 33 47 68 100 150
* Voltage
V1
Vcc
V2
Vc
*Vpul Vc
supply
0
0
0
DC 3.0V
DC 0.0V
PULSE(0 3V 100ns 0 0 9us 1000m)
High Frequency Products
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Edition A13, 06/00
BGC405
* Internal Resistors
R1
3 Vc
47k
R2
Vr 2
500
R3
Vb 0
10k
R4
Vb rfin
2.7k
TC=-0.0006,0.0000025
TC=-0.0006,0.0
TC=-0.0006,0.0000025
TC=-0.0006,0.0
* External Resistors
Rx
Vcc Vr
{R}
Rout vout 0
50
Rin
vin 0
50
TC=+0.000050,0.0
* External Capacitors
C2
C3
C7
C6
Vb 0
Vr 0
rfin vin
rfout vout
1nF
100pF
220pF
220pF
* Inductors (external)
L1
Vr rfout
100nH
* Transistors
Q1
rfout rfin 0
X2
2 3 Vb 0
X3
Vcc 5 5 0
X4
5 3 3 0
BFP405
8PL18
2PL18
2PL18
.PROBE
.MODEL BFP405 NPN(
+ IS = 1.9969e-16
+ VAF = 39.251
+ NE = 1.7763
+ VAR = 34.368
+ NC = 1.3152
+ RBM = 1.3491
+ CJE = 3.7265e-15
+ TF = 4.5899e-12
+ ITF = 0.0013364
+ VJC = 0.99532
+ TR = 1.4935e-09
+ MJS = 0
+ XTI = 3
* PNP:
BF = 83.23
IKF = 0.16493
BR = 10.526
IKR = 0.25052
RB = 15
RE = 1.9289
VJE = 0.70367
XTF = 0.3641
PTF = 0
MJC = 0.48652
CJS= 0
XTB = 0
FC = 0.99469)
NF = 1.0405
ISE = 1.5761e-14
NR = 0.96647
ISC = 3.7223e-17
IRB = 0.00021215
RC = 0.12691
MJE = 0.37747
VTF = 0.19762
CJC = 9.6941e-14
XCJC = 0.08161
VJS = 0.75
EG = 1.11
PL18 E B C Bulk
.SUBCKT 8PL18
Q1
993
2
Q2
94
2
Q3
94
2
RCEX 993
1
.ENDS
3
2
3
3
993
High Frequency Products
1
94
94
94
94
TL18 8
VSL18 8
LSL18 8
0.204
8
Edition A13, 06/00
BGC405
.SUBCKT 2PL18
Q1
993
2
Q2
94
2
Q3
94
2
RCEX 993
1
.ENDS
3
2
3
3
993
1
94
94
94
94
TL18 2
VSL18 2
LSL18 2
0.816
*****
.MODEL
+IS
+NE
+BR
+VAF
+IKR
+RBM
+XTB
+CJE
+TF
+ITF
+MJC
+CJS
+PTF
TL18
= 2.914E-17
= 1.553E+00
= 2.869E+01
= 6.000E+01
= 2.474E-05
= 4.000E+01
=-6.000E-01
= 1.200E-14
= 7.600E-10
= 1.400E-02
= 3.760E-01
= 0.000E+00
= 0.000E+00
PNP
NF
ISE
NC
IKF
RB
RE
EG
VJE
XTF
CJC
XCJC
VJS
FC
=
=
=
=
=
=
=
=
=
=
=
=
=
1.000E+00
6.923E-16
1.500E+00
1.676E-04
6.000E+01
2.597E+00
1.156E+00
4.900E-01
2.872E-01
4.700E-13
1.000E+00
7.500E-01
5.000E-01
BF
NR
ISC
VAR
IRB
RC
XTI
MJE
VTF
VJC
TR
MJS
=
=
=
=
=
=
=
=
=
=
=
=
4.005E+02
1.000E+00
8.190E-15
2.214E+00
0.000E+00
4.000E+00
3.000E+00
1.360E-01
1.000E+03
7.610E-01
0.000E+00
0.000E+00
*****
.MODEL
+IS
+NE
+BR
+VAF
+IKR
+RBM
+XTB
+CJE
+TF
+ITF
+MJC
+CJS
+PTF
=
=
=
=
=
=
=
=
=
=
=
=
=
VSL18
1.630E-19
1.500E+00
1.000E+09
1.000E+02
1.000E+00
0.000E+00
0.000E+00
0.000E+00
2.000E-09
1.000E+06
3.770E-01
0.000E+00
0.000E+00
PNP
NF
ISE
NC
IKF
RB
RE
EG
VJE
XTF
CJC
XCJC
VJS
FC
=
=
=
=
=
=
=
=
=
=
=
=
=
1.000E+00
0.000E+00
2.000E+00
1.794E-04
0.000E+00
0.000E+00
1.122E+00
6.800E-01
0.000E+00
1.950E-13
0.000E+00
7.500E-01
5.000E-01
BF
NR
ISC
VAR
IRB
RC
XTI
MJE
VTF
VJC
TR
MJS
=
=
=
=
=
=
=
=
=
=
=
=
1.000E+09
1.000E+00
0.000E+00
1.700E+00
0.000E+00
0.000E+00
3.000E+00
3.400E-01
1.000E+03
5.500E-01
0.000E+00
0.000E+00
=
=
=
=
=
=
=
=
=
=
=
=
=
LSL18
4.261E-17
1.500E+00
1.000E+09
6.000E+01
1.000E+00
0.000E+00
0.000E+00
0.000E+00
1.000E-09
1.000E+06
3.000E-01
0.000E+00
0.000E+00
PNP
NF
ISE
NC
IKF
RB
RE
EG
VJE
XTF
CJC
XCJC
VJS
FC
=
=
=
=
=
=
=
=
=
=
=
=
=
1.000E+00
0.000E+00
2.000E+00
9.648E-05
0.000E+00
0.000E+00
1.158E+00
6.800E-01
0.000E+00
0.000E+00
0.000E+00
7.500E-01
5.000E-01
BF
NR
ISC
VAR
IRB
RC
XTI
MJE
VTF
VJC
TR
MJS
=
=
=
=
=
=
=
=
=
=
=
=
1.000E+09
1.000E+00
0.000E+00
1.700E+00
0.000E+00
0.000E+00
3.000E+00
3.400E-01
1.000E+03
4.600E-01
0.000E+00
0.000E+00
*****
.MODEL
+IS
+NE
+BR
+VAF
+IKR
+RBM
+XTB
+CJE
+TF
+ITF
+MJC
+CJS
+PTF
*****
.END
High Frequency Products
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Edition A13, 06/00
BGC405
Vcc
Rx
2
Vr
R2
V1
X3
C3
X4
3
X2
L1
RFout
R1
Lp1
Lp7
R4
Lp2
Cp1
Q1
R3
Lp6
Cp3
Vc
Vb
Lp3
Cp2
Lp5
Lp4
RFin
GND
V2
C2
Figure 4. Parasitic circuit elements for frequencies above 100MHz
Element
Value
Lp1
0.58nH
Lp2
0.56nH
Lp3
0.23nH
Lp4
0.05nH
Lp5
0.53nH
Lp6
0.47nH
Lp7
1nH
Cp1
134fF
Cp2
136fF
Cp3
6.9fF
Table 1. Parasitic circuit elements for frequencies above 100MHz
High Frequency Products
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Edition A13, 06/00