BFR30LT1 Datasheet, PDF (2/4 Pages) Motorola, Inc – JFET Amplifiers(N-Channel)

BFR30LT1, BFR31LT1
ELECTRICAL CHARACTERISTICS (T_A = 25°C unless otherwise noted)
Characteristic
OFF CHARACTERISTICS
Gate Reverse Current
Gate Source Cutoff Voltage
(V_GS = 10 Vdc, V_DS = 0)
(I_D = 0.5 nAdc, V_DS = 10 Vdc)
BFR30
BFR31
Gate Source Voltage
(I_D = 1.0 mAdc, V_DS = 10 Vdc)
(I_D = 50 mAdc, V_DS = 10 Vdc)
BFR30
BFR31
BFR30
BFR31
ON CHARACTERISTICS
Zero −Gate −Voltage Drain Current (V_DS = 10 Vdc, V_GS = 0)
BFR30
BFR31
SMALL−SIGNAL CHARACTERISTICS
Forward Transconductance
(I_D = 1.0 mAdc, V_DS = 10 Vdc, f = 1.0 kHz)
(I_D = 200 mAdc, V_DS = 10 Vdc, f = 1.0 kHz)
BFR30
BFR31
BFR30
BFR31
Output Admittance
(I_D = 1.0 mAdc, V_DS = 10 Vdc, f = 1.0 kHz)
(I_D = 200 mAdc, V_DS = 10 Vdc)
BFR30
BFR31
Input Capacitance
(I_D = 1.0 mAdc, V_DS = 10 Vdc, f = 1.0 MHz)
(I_D = 200 mAdc, V_DS = 10 Vdc, f = 1.0 MHz)
Reverse Transfer Capacitance
(I_D = 1.0 mAdc, V_DS = 10 Vdc, f = 1.0 MHz)
(I_D = 200 mAdc, V_DS = 10 Vdc, f = 1.0 MHz)
Symbol
Min
Max
Unit
I_GSS
V_GS(OFF)
V_GS
−
−
−
− 0.7
−
−
−
0.2
5.0
2.5
− 3.0
− 1.3
− 4.0
− 2.0
nAdc
Vdc
Vdc
I_DSS
4.0
10
mAdc
1.0
5.0
ťy_fsť
mmhos
1.0
4.0
1.5
4.5
0.5
−
0.75
−
ťy_osť
mmhos
40
25
20
15
C_iss
−
5.0
pF
−
4.0
C_rss
−
1.5
pF
−
1.5
TYPICAL CHARACTERISTICS
5
14
V_DS = 15 V
12
V_DS = 15 V
4
V_GS = 0
V_GS = 0
R_S = 1 MW
10
f = 1 kHz
3
8
2
6
4
1
2
0
0.01
0.1
1.0
10
100
f, FREQUENCY (kHz)
Figure 1. Noise Figure versus Frequency
0
0.001
0.01
0.1
1.0
10
R_S, SOURCE RESISTANCE (Megohms)
Figure 2. Noise Figure versus Source
Resistance
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2