2N4338 Datasheet, PDF (6/6 Pages) Calogic, LLC – N-Channel JFET Low Noise Amplifier

2N4338/4339/4340/4341
Vishay Siliconix
TYPICAL CHARACTERISTICS (T_A = 25_C UNLESS OTHERWISE NOTED)
Common-Source Input Capacitance
vs. Gate-Source Voltage
10
f = 1 MHz
Common-Source Reverse Feedback
Capacitance vs. Gate-Source Voltage
5
f = 1 MHz
8
4
6
V_DS = 0 V
4
10 V
2
0
0
–4
–8
–12
–16
–20
V_GS – Gate-Source Voltage (V)
Output Conductance vs. Drain Current
3
V_GS(off) = –1.5 V
V_DS = 10 V
f = 1 kHz
2.4
1.8
0.8
0.4
0
0.01
T_A = –55_C
25_C
125_C
0.1
1
I_D – Drain Current (mA)
3
V_DS = 0 V
2
1
10 V
0
0
–4
–8
–12
–16
–20
V_GS – Gate-Source Voltage (V)
Equivalent Input Noise Voltage vs. Frequency
20
V_DS = 10 V
16
12
I_D = 100 mA
8
I_D = I_DSS
4
0
10
100
1k
10 k
f – Frequency (Hz)
100 k
www.vishay.com
7-6
Document Number: 70240
S-04028—Rev. E, 04-Jun-01