2N4338 Datasheet, PDF (5/6 Pages) Calogic, LLC – N-Channel JFET Low Noise Amplifier

2N4338/4339/4340/4341
Vishay Siliconix
TYPICAL CHARACTERISTICS (T_A = 25_C UNLESS OTHERWISE NOTED)
Transfer Characteristics
500
V_GS(off) = –0.7 V
V_DS = 10 V
Transfer Characteristics
2
V_GS(off) = –1.5 V
V_DS = 10 V
400
300
T_A = –55_C
25_C
200
1.6
T_A = –55_C
1.2
25_C
0.8
125_C
100
0.4
125_C
0
0
–0.1
–0.2
–0.3
–0.4
–0.5
V_GS – Gate-Source Voltage (V)
Transconductance vs. Gate-Source Voltage
1.5
V_GS(off) = –0.7 V
V_DS = 10 V
f = 1 kHz
1.2
T_A = –55_C
25_C
0.9
0.6
125_C
0.3
0
0
–0.1
–0.2
–0.3
–0.4
–0.5
V_GS – Gate-Source Voltage (V)
Circuit Voltage Gain vs. Drain Current
200
A_V + ₁
g_fs R_L
) R_Lg_os
160
Assume V_DD = 15 V, V_DS = 5 V
120
R_L
+
10 V
I_D
0
0
–0.4
–0.8
–1.2
–1.6
–2
V_GS – Gate-Source Voltage (V)
Transconductance vs. Gate-Source Voltage
4
V_GS(off) = –1.5 V
V_DS = 10 V
f = 1 kHz
3.2
2.4
T_A = –55_C
25_C
1.6
0.8
125_C
0
0
–0.4
–0.8
–1.2
–1.6
–2
V_GS – Gate-Source Voltage (V)
2000
1600
1200
On-Resistance vs. Drain Current
T_A = 25_C
V_GS(off) = –0.7 V
80
V_GS(off) = –0.7 V
–1.5 V
40
0
0.01
0.1
1
I_D – Drain Current (mA)
Document Number: 70240
S-04028—Rev. E, 04-Jun-01
800
400
0
0.01
–1.5 V
0.1
I_D – Drain Current (mA)
1
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