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3SK238

型号:

3SK238

品牌:

ETC[ ETC ]

页数:

4 页

PDF大小:

22 K

3SK238  
Silicon N–Channel Dual Gate MOSFET  
Application  
CMPAK-4  
UHF RF amplifier  
Features  
2
• Excellent cross modulation characteristics  
• Capable of low voltage operation  
3
1
4
1. Source  
2. Gate1  
3. Gate2  
4. Drain  
Table 1 Absolute Maximum Ratings (Ta = 25°C)  
Item  
Symbol  
Ratings  
Unit  
———————————————————————————————————————————  
Drain to source voltage  
V
12  
V
DS  
———————————————————————————————————————————  
Gate1 to source voltage  
V
±10  
V
G1S  
———————————————————————————————————————————  
Gate2 to source voltage  
V
±10  
V
G2S  
———————————————————————————————————————————  
Drain current  
I
35  
mA  
D
———————————————————————————————————————————  
Channel power dissipation  
P
100  
mW  
ch  
———————————————————————————————————————————  
Channel temperature  
Tch  
125  
°C  
———————————————————————————————————————————  
Storage temperature  
Tstg  
–55 to +125  
°C  
———————————————————————————————————————————  
Marking is “XW–”.  
3SK238  
Table 2 Electrical Characteristics (Ta = 25°C)  
Item  
Symbol  
Min  
Typ  
Max  
Unit  
Test conditions  
———————————————————————————————————————————  
Drain to source  
V
12  
V
I
= 200 µA, V  
= –5 V,  
(BR)DSX  
D
G1S  
breakdown voltage  
V
= –5 V  
G2S  
———————————————————————————————————————————  
Gate1 to source  
V
±10  
V
I
= ±10 µA,  
(BR)G1SS  
G1  
breakdown voltage  
V
= V  
= 0  
G2S  
DS  
———————————————————————————————————————————  
Gate2 to source  
V
±10  
V
I
= ±10 µA,  
(BR)G2SS  
G2  
breakdown voltage  
V
= V  
= 0  
G1S  
DS  
———————————————————————————————————————————  
Gate1 leakage  
current  
I
±100  
nA  
V
V
= ±8 V,  
G1SS  
G1S  
G2S  
= V  
= 0  
DS  
———————————————————————————————————————————  
Gate2 leakage  
current  
I
±100  
nA  
V
V
= ±8 V,  
G2SS  
G2S  
G1S  
= V  
= 0  
DS  
———————————————————————————————————————————  
Drain current  
I
0
2
mA  
V
= 6 V, V  
= 0,  
DSS  
DS  
G1S  
V
= 3 V  
G2S  
———————————————————————————————————————————  
Gate1 to source  
V
–0.7  
+0.7  
V
V
= 10 V, V  
= 3V,  
G1S(off)  
DS  
G2S  
cutoff voltage  
I
= 100 µA  
D
———————————————————————————————————————————  
Gate2 to source  
V
–0.1  
+0.8  
V
V
= 10 V, V  
= 3V,  
G2S(off)  
DS  
G1S  
cutoff voltage  
I
= 100 µA  
D
———————————————————————————————————————————  
Forward transfer  
|y |  
14  
mS  
V
= 6V, V  
= 3 V,  
fs  
DS  
G2S  
admittance  
I
= 10 mA, f = 1 kHz  
D
———————————————————————————————————————————  
Input capacitance  
Ciss  
0.9  
1.25  
1.8  
pF  
V
= 6 V,  
DS  
——————————————————————————————  
V
= 3 V,I = 10 mA,  
D
G2S  
Output capacitance  
Coss  
0.4  
0.7  
1.2  
pF  
f = 1 MHz  
——————————————————————————————  
Reverse transfer  
Crss  
0.015  
0.03  
pF  
capacitance  
———————————————————————————————————————————  
Power gain  
PG  
16  
19.4  
dB  
V
= 4 V, V  
= 3 V,  
DS  
G2S  
——————————————————————————————  
I = 10 mA, f = 900 MHz  
D
Noise figure  
NF  
2.8  
4
dB  
———————————————————————————————————————————  
3SK238  
Maximum channel power dissipation curve  
200  
Typical output characteristics  
= 3 V  
20  
16  
12  
8
V
G2S  
150  
100  
50  
4
V
G1S  
= 0.2 V  
0
50  
100  
150  
200  
0
2
4
6
8
10  
(V)  
Drain to Source Voltage  
V
Ambient Temperature Ta (°C)  
DS  
Drain current vs. Gate1 to source voltage  
20  
Drain current vs. gate2 to source voltage  
20  
V
= 4 V  
V
= 4 V  
DS  
DS  
3 V  
2.5 V  
2 V  
1.5 V  
16  
12  
8
16  
12  
8
2 V  
1.5 V  
= 1 V  
1 V  
V
G2S  
4
4
0
V
G1S  
= 0.5 V  
3
–0.5  
0
0.5  
1
1.5  
G1S  
2
0
1
2
4
G2S  
5
Gate1 to Source Voltage V  
(V)  
Gate2 to Source Voltage V  
(V)  
3SK238  
Forward transfer admittance  
vs. gate1 to source voltage  
Power gain vs. drain current  
20  
16  
12  
8
25  
V
= 6 V  
DS  
f = 1 kHz  
20  
15  
10  
5
V
= 3 V  
G2S  
2.5 V  
2 V  
1.5 V  
V
= 4 V  
= 3 V  
DS  
4
V
G2S  
1 V  
1.2  
f = 900 MHz  
0
0.4  
0.8  
1.6  
G1S  
2
0
4
8
12  
16 20  
Gate1 to Source Voltage V  
(V)  
Drain Current  
I
D
(mA)  
Noise figure vs. drain current  
5
4
3
2
1
V
= 4 V  
= 3 V  
DS  
V
G2S  
f = 900 MHz  
0
4
8
12  
I
D
16  
(mA)  
20  
Drain Current  
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