ON Semiconductort
JFET VHF/UHF Amplifiers
N–Channel — Depletion
3
GATE
1 DRAIN
2N5486
2 SOURCE
MAXIMUM RATINGS
Rating
Drain–Gate Voltage
Reverse Gate–Source Voltage
Drain Current
Forward Gate Current
Total Device Dissipation @ T
C
= 25°C
Derate above 25°C
Operating and Storage Junction
Temperature Range
Symbol
V
DG
V
GSR
I
D
I
G(f)
P
D
T
J
, T
stg
Value
25
25
30
10
350
2.8
–65 to +150
Unit
Vdc
Vdc
mAdc
mAdc
mW
mW/°C
°C
1
2
3
CASE 29–11, STYLE 5
TO–92 (TO–226AA)
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C unless otherwise noted)
Characteristic
Symbol
Min
Typ
Max
Unit
OFF CHARACTERISTICS
Gate–Source Breakdown Voltage
(I
G
= –1.0
µAdc,
V
DS
= 0)
Gate Reverse Current
(V
GS
= –20 Vdc, V
DS
= 0)
(V
GS
= –20 Vdc, V
DS
= 0, T
A
= 100°C)
Gate Source Cutoff Voltage
(V
DS
= 15 Vdc, I
D
= 10 nAdc)
V
(BR)GSS
I
GSS
—
—
V
GS(off)
–2.0
—
–6.0
—
—
–1.0
–0.2
nAdc
µAdc
Vdc
–25
—
—
Vdc
ON CHARACTERISTICS
Zero–Gate–Voltage Drain Current
(V
DS
= 15 Vdc, V
GS
= 0)
I
DSS
8.0
—
20
mAdc
SMALL–SIGNAL CHARACTERISTICS
Forward Transfer Admittance
(V
DS
= 15 Vdc, V
GS
= 0, f = 1.0 kHz)
Input Admittance
(V
DS
= 15 Vdc, V
GS
= 0, f = 400 MHz)
Output Admittance
(V
DS
= 15 Vdc, V
GS
= 0, f = 1.0 kHz)
Output Conductance
(V
DS
= 15 Vdc, V
GS
= 0, f = 400 MHz)
Forward Transconductance
(V
DS
= 15 Vdc, V
GS
= 0, f = 400 MHz)
y
fs
4000
Re(y
is
)
—
y
os
—
Re(y
os
)
—
Re(y
fs
)
3500
—
—
—
100
mmhos
—
75
mmhos
—
1000
mmhos
—
8000
mmhos
mmhos
©
Semiconductor Components Industries, LLC, 2001
76
May, 2001 – Rev. 0
Publication Order Number:
2N5486/D
2N5486
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C unless otherwise noted) (Continued)
Characteristic
Symbol
Min
Typ
Max
Unit
SMALL–SIGNAL CHARACTERISTICS (continued)
Input Capacitance
(V
DS
= 15 Vdc, V
GS
= 0, f = 1.0 MHz)
Reverse Transfer Capacitance
(V
DS
= 15 Vdc, V
GS
= 0, f = 1.0 MHz)
Output Capacitance
(V
DS
= 15 Vdc, V
GS
= 0, f = 1.0 MHz)
C
iss
C
rss
C
oss
—
—
—
—
—
—
5.0
1.0
2.0
pF
pF
pF
COMMON SOURCE CHARACTERISTICS
ADMITTANCE PARAMETERS
(V
DS
= 15 Vdc, T
channel
= 25°C)
grs , REVERSE TRANSADMITTANCE (mmhos)
brs , REVERSE SUSCEPTANCE (mmhos)
30
20
10
7.0
5.0
3.0
2.0
1.0
0.7
0.5
0.3
10
20
30
b
is
@ I
DSS
5.0
3.0
2.0
1.0
0.7
0.5
0.3
0.2
g
rs
@ I
DSS
, 0.25 I
DSS
10
20
30
50 70 100
200 300
f, FREQUENCY (MHz)
500 700 1000
b
rs
@ I
DSS
0.25 I
DSS
gis, INPUT CONDUCTANCE (mmhos)
bis, INPUT SUSCEPTANCE (mmhos)
g
is
@ I
DSS
g
is
@ 0.25 I
DSS
b
is
@ 0.25 I
DSS
50 70 100
200 300
f, FREQUENCY (MHz)
500 700 1000
0.1
0.07
0.05
Figure 1. Input Admittance (y
is
)
Figure 2. Reverse Transfer Admittance (y
rs
)
gfs, FORWARD TRANSCONDUCTANCE (mmhos)
|b fs|, FORWARD SUSCEPTANCE (mmhos)
20
10
7.0
5.0
3.0
2.0
1.0
0.7
0.5
0.3
0.2
10
|b
fs
| @ I
DSS
|b
fs
| @ 0.25 I
DSS
gos, OUTPUT ADMITTANCE (mhos)
bos, OUTPUT SUSCEPTANCE (mhos)
10
5.0
2.0
1.0
0.5
0.2
0.1
g
os
@ I
DSS
b
os
@ I
DSS
and 0.25 I
DSS
g
fs
@ I
DSS
g
fs
@ 0.25 I
DSS
0.05
0.02
0.01
10
20
30
g
os
@ 0.25 I
DSS
50 70 100
200 300
f, FREQUENCY (MHz)
500 700 1000
20
30
50 70 100
200 300
f, FREQUENCY (MHz)
500 700 1000
Figure 3. Forward Transadmittance (y
fs
)
Figure 4. Output Admittance (y
os
)
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77
2N5486
COMMON SOURCE CHARACTERISTICS
S–PARAMETERS
(V
DS
= 15 Vdc, T
channel
= 25°C, Data Points in MHz)
30°
40°
20°
10°
0°
1.0
350°
100
100
50°
0.9
200
300
60°
70°
80°
90°
100°
110°
120°
0.8
I
D
= I
DSS
400
500
600
0.6
900
800
700
900
600
700
800
290°
280°
270°
260°
250°
240°
70°
80°
90°
100°
110°
120°
340°
330°
320°
40°
30°
20°
10°
0°
0.4
350°
340°
330°
320°
I
D
= 0.25 I
DSS
200
300
400
500
300°
60°
310°
50°
I
D
= I
DSS
, 0.25 I
DSS
800
600
400
300
200
100
0.0
700
500
0.1
900
0.2
300°
290°
280°
270°
260°
250°
240°
0.3
310°
0.7
130°
230°
130°
230°
140°
150°
160°
170°
180°
190°
200°
210°
220°
140°
150°
160°
170°
180°
190°
200°
210°
220°
Figure 5. S
11s
30°
40°
20°
10°
0°
350°
340°
330°
320°
40°
30°
20°
10°
Figure 6. S
12s
0°
350°
340°
330°
100 200
I
D
= 0.25 I
DSS
300
1.0
400
100 200
500
300
600
400
700
0.9
500
800
600
I
D
= I
DSS
700
900
800
900
0.8
320°
50°
0.6
310°
50°
310°
60°
70°
80°
90°
100°
110°
120°
900
800
700
600
500
400
300
I
D
= I
DSS
200
100
800
700
600
I
D
= 0.25 I
DSS
500
400
300
200
100
900
0.5
300°
290°
280°
270°
60°
70°
80°
90°
100°
110°
120°
300°
290°
280°
270°
260°
250°
240°
0.4
0.7
0.3
0.6
0.3
260°
250°
240°
0.4
0.5
130°
0.6
230°
130°
230°
140°
150°
160°
170°
180°
190°
200°
210°
220°
140°
150°
160°
170°
180°
190°
200°
210°
220°
Figure 7. S
21s
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78
Figure 8. S
22s
2N5486
COMMON GATE CHARACTERISTICS
ADMITTANCE PARAMETERS
(V
DG
= 15 Vdc, T
channel
= 25°C)
grg , REVERSE TRANSADMITTANCE (mmhos)
brg , REVERSE SUSCEPTANCE (mmhos)
20
gig, INPUT CONDUCTANCE (mmhos)
big, INPUT SUSCEPTANCE (mmhos)
10
7.0
5.0
3.0
2.0
1.0
0.7
0.5
0.3
0.2
10
20
30
0.5
0.3
0.2
0.1
0.07
0.05
0.03
0.02
0.01
10
20
30
g
ig
@ I
DSS
, 0.25 I
DSS
50 70 100
200 300
f, FREQUENCY (MHz)
500 700 1000
0.25 I
DSS
b
rg
@ I
DSS
g
ig
@ I
DSS
g
rg
@ 0.25 I
DSS
b
ig
@ I
DSS
b
ig
@ 0.25 I
DSS
50 70 100
200 300
f, FREQUENCY (MHz)
500 700 1000
0.007
0.005
Figure 9. Input Admittance (y
ig
)
Figure 10. Reverse Transfer Admittance (y
rg
)
gfg , FORWARD TRANSCONDUCTANCE (mmhos)
bfg , FORWARD SUSCEPTANCE (mmhos)
3.0
2.0
1.0
0.7
0.5
0.3
0.2
0.1
10
20
30
b
fg
@ I
DSS
g
fg
@ 0.25 I
DSS
gog, OUTPUT ADMITTANCE (mmhos)
bog, OUTPUT SUSCEPTANCE (mmhos)
10
7.0
5.0
g
fg
@ I
DSS
1.0
0.7
0.5
0.3
0.2
0.1
0.07
0.05
0.03
0.02
0.01
10
b
og
@ I
DSS
, 0.25 I
DSS
g
og
@ I
DSS
b
rg
@ 0.25 I
DSS
50 70 100
200 300
f, FREQUENCY (MHz)
g
og
@ 0.25 I
DSS
20
30
50 70 100
200 300
f, FREQUENCY (MHz)
500 700 1000
500 700 1000
Figure 11. Forward Transfer Admittance (y
fg
)
Figure 12. Output Admittance (y
og
)
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79
2N5486
COMMON GATE CHARACTERISTICS
S–PARAMETERS
(V
DS
= 15 Vdc, T
channel
= 25°C, Data Points in MHz)
30°
40°
20°
10°
0°
0.7
100
0.6
50°
100
0.5
60°
70°
80°
90°
100°
110°
120°
0.4
I
D
= I
DSS
200
200
300
350°
340°
330°
320°
40°
30°
20°
10°
0°
0.04
350°
340°
330°
320°
I
D
= 0.25 I
DSS
400
0.03
500
600
700
800
900
290°
280°
270°
260°
250°
240°
70°
80°
90°
100°
110°
120°
600
I
D
= I
DSS
700
800
900
100
500
600
700
800
I
D
= 0.25 I
DSS
0.01
0.01
290°
280°
270°
260°
250°
240°
310°
50°
0.02
310°
300
400
500
600
700
300°
60°
300°
0.3
800
900
0.0
0.02
130°
230°
130°
900
230°
0.03
220°
190°
200°
210°
140°
150°
160°
170°
180°
190°
200°
210°
220°
140°
150°
160°
170°
0.04
180°
Figure 13. S
11g
30°
40°
20°
10°
0°
0.5
100
100
0.3
I
D
= I
DSS
310°
50°
350°
340°
330°
320°
40°
30°
20°
Figure 14. S
12g
10°
0°
1.5
1.0
100
0.9
350°
300
200
400
340°
500
600
700
800
900
310°
330°
320°
0.4
50°
I
D
= I
DSS
, 0.25 I
DSS
0.8
60°
70°
80°
90°
100°
110°
120°
300°
I
D
= 0.25 I
DSS
290°
280°
900
900
270°
260°
250°
240°
60°
70°
80°
90°
100°
110°
120°
300°
290°
280°
270°
260°
250°
240°
0.2
0.7
0.1
0.6
130°
230°
130°
230°
140°
150°
160°
170°
180°
190°
200°
210°
220°
140°
150°
160°
170°
180°
190°
200°
210°
220°
Figure 15. S
21g
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80
Figure 16. S
22g