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BF245AZL1 [ONSEMI]

UHF BAND, Si, N-CHANNEL, RF SMALL SIGNAL, JFET, TO-92, CASE 29-11, TO-226AA, 3 PIN;
BF245AZL1
型号： BF245AZL1
厂家： ONSEMI    ONSEMI
描述：

UHF BAND, Si, N-CHANNEL, RF SMALL SIGNAL, JFET, TO-92, CASE 29-11, TO-226AA, 3 PIN

放大器 晶体管
文件： 总5页 (文件大小：252K)
中文：  中文翻译
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ON Semiconductort  
BF245A  
BF245B  
JFET VHF/UHF Amplifiers  
N–Channel — Depletion  
MAXIMUM RATINGS  
Rating  
Drain–Source Voltage  
Symbol  
Value  
±30  
30  
Unit  
Vdc  
V
DS  
DG  
GS  
Drain–Gate Voltage  
Gate–Source Voltage  
Drain Current  
V
V
Vdc  
1
2
3
30  
Vdc  
BF244A, BF244B  
CASE 29–11, STYLE 22  
TO–92 (TO–226AA)  
I
D
100  
10  
mAdc  
mAdc  
Forward Gate Current  
I
G(f)  
Total Device Dissipation @ T = 25°C  
Derate above 25°C  
P
D
350  
2.8  
mW  
mW/°C  
A
Storage Channel Temperature Range  
T
stg  
–65 to +150  
°C  
3 DRAIN  
3 DRAIN  
1
2
3
BF245, BF245A,  
BF245B, BF245C  
CASE 29–11, STYLE 23  
TO–92 (TO–226AA)  
2
1
GATE  
GATE  
STYLE 22  
STYLE 23  
1 SOURCE  
2 SOURCE  
ELECTRICAL CHARACTERISTICS (T = 25°C unless otherwise noted)  
A
Characteristic  
Symbol  
Min  
Typ  
Max  
Unit  
OFF CHARACTERISTICS  
Gate–Source Breakdown Voltage  
V
30  
—
—
Vdc  
Vdc  
(BR)GSS  
(I = 1.0 µAdc, V = 0)  
G
DS  
Gate–Source  
V
GS  
(1)  
(V = 15 Vdc, I = 200 µAdc)  
BF245  
0.4  
0.4  
1.6  
3.2  
—
—
—
—
7.5  
2.2  
3.8  
7.5  
DS  
D
(2)  
BF245A, BF244A  
BF245B, BF244B  
BF245C  
Gate–Source Cutoff Voltage  
(V = 15 Vdc, I = 10 nAdc)  
V
GS(off)  
–ā0.5  
—
–ā8.0  
Vdc  
DS  
D
Gate Reverse Current  
(V = 20 Vdc, V = 0)  
I
—
—
5.0  
nAdc  
GSS  
GS  
DS  
ON CHARACTERISTICS  
Zero–Gate–Voltage Drain Current  
I
mAdc  
DSS  
(1)  
(V = 15 Vdc, V = 0)  
BF245  
2.0  
2.0  
6.0  
12  
—
—
—
—
25  
6.5  
15  
25  
DS  
GS  
(2)  
BF245A, BF244A  
BF245B, BF244B  
BF245C  
1. On orders against the BF245, any or all subgroups might be shipped.  
2. On orders against the BF244A, any or all subgroups might be shipped.  
Semiconductor Components Industries, LLC, 2001  
332  
Publication Order Number:  
June, 2001 – Rev. 0  
BF245A/D  
BF245A BF245B  
ELECTRICAL CHARACTERISTICS (T = 25°C unless otherwise noted) (Continued)  
A
Characteristic  
Symbol  
Min  
Typ  
Max  
Unit  
SMALL–SIGNAL CHARACTERISTICS  
Forward Transfer Admittance  
Output Admittance  
(V = 15 Vdc, V = 0, f = 1.0 kHz)  
Y
fs  
3.0  
—
—
—
—
—
—
—
—
40  
6.5  
—
—
—
—
—
—
—
mmhos  
mmhos  
mmhos  
mmhos  
pF  
DS  
GS  
(V = 15 Vdc, V = 0, f = 1.0 kHz)  
Y
os  
DS  
GS  
Forward Transfer Admittance  
Reverse Transfer Admittance  
Input Capacitance  
(V = 15 Vdc, V = 0, f = 200 MHz)  
Y
5.6  
1.0  
3.0  
0.7  
0.9  
700  
DS  
GS  
fs  
rs  
(V = 15 Vdc, V = 0, f = 200 MHz)  
Y
DS  
GS  
(V = 20 Vdc, –V = 1.0 Vdc)  
C
DS  
GS  
iss  
rss  
oss  
Reverse Transfer Capacitance  
Output Capacitance  
(V = 20 Vdc, –V = 1.0 Vdc, f = 1.0 MHz)  
C
pF  
DS  
GS  
(V = 20 Vdc, –V = 1.0 Vdc, f = 1.0 MHz)  
C
pF  
DS  
GS  
(3)  
Cut–off Frequency  
(V = 15 Vdc, V = 0)  
F
(Yfs)  
MHz  
DS  
GS  
3. The frequency at which g is 0.7 of its value at 1 kHz.  
fs  
COMMON SOURCE CHARACTERISTICS  
ADMITTANCE PARAMETERS  
(VDS = 15 Vdc, Tchannel = 25°C)  
30  
20  
5.0  
3.0  
2.0  
b
@ I  
DSS  
10  
7.0  
5.0  
is  
b
rs  
@ I  
DSS  
1.0  
0.7  
0.5  
0.25 I  
DSS  
3.0  
2.0  
g
is  
@ I  
DSS  
0.3  
0.2  
g
is  
@ 0.25 I  
DSS  
1.0  
0.7  
0.5  
0.1  
g
rs  
@ I , 0.25 I  
DSS  
DSS  
b
is  
@ 0.25 I  
DSS  
0.07  
0.05  
0.3  
10  
20 30  
50 70 100  
200 300  
1000  
10  
20 30  
50 70 100  
200 300  
1000  
500 700  
500 700  
f, FREQUENCY (MHz)  
f, FREQUENCY (MHz)  
Figure 1. Input Admittance (yis)  
Figure 2. Reverse Transfer Admittance (yrs)  
20  
10  
10  
5.0  
b
os  
@ I and 0.25 I  
DSS DSS  
7.0  
5.0  
2.0  
1.0  
g
fs  
@ I  
DSS  
g
fs  
@ 0.25 I  
DSS  
3.0  
2.0  
0.5  
0.2  
0.1  
g
@ I  
DSS  
os  
1.0  
0.7  
0.5  
|b | @ I  
fs  
DSS  
0.05  
|b | @ 0.25 I  
fs  
DSS  
g
@ 0.25 I  
DSS  
os  
0.02  
0.01  
0.3  
0.2  
10  
20 30  
50 70 100  
200 300  
1000  
10  
20 30  
50 70 100  
200 300  
1000  
500 700  
500 700  
f, FREQUENCY (MHz)  
f, FREQUENCY (MHz)  
Figure 3. Forward Transadmittance (yfs)  
Figure 4. Output Admittance (yos)  
http://onsemi.com  
333  
BF245A BF245B  
COMMON SOURCE CHARACTERISTICS  
S–PARAMETERS  
(VDS = 15 Vdc, Tchannel = 25°C, Data Points in MHz)  
30°  
20°  
10°  
0°  
350°  
340°  
330°  
30°  
20°  
10°  
0°  
350°  
340°  
330°  
I
= 0.25 I  
100  
D
DSS  
1.0  
40°  
50°  
40°  
50°  
0.4  
320°  
310°  
32  
31  
200  
300  
100  
200  
0.9  
0.8  
0.7  
0.6  
0.3  
400  
500  
600  
700  
800  
I
D
= I , 0.25 I  
DSS  
DSS  
800  
300  
900  
700  
500  
0.2  
0.1  
I
D
= I  
DSS  
60°  
70°  
300°  
290°  
60°  
70°  
30  
29  
400  
500  
600  
400  
300  
200  
600  
80°  
90°  
280°  
270°  
260°  
80°  
90°  
28  
27  
26  
0.0  
700  
800  
900  
900  
100  
100°  
100°  
110°  
120°  
250°  
240°  
110°  
120°  
25  
24  
130°  
140°  
230°  
220°  
130°  
140°  
23  
22  
150°  
30°  
160°  
20°  
170°  
180°  
190°  
200°  
210°  
330°  
150°  
30°  
160°  
20°  
170°  
180°  
190°  
200°  
340°  
210°  
330°  
Figure 5. S11s  
Figure 6. S12s  
10°  
0°  
350°  
340°  
10°  
0°  
100  
1.0  
100  
350°  
200  
I
D
= 0.25 I  
DSS  
300  
40°  
50°  
40°  
50°  
320°  
310°  
32  
31  
400  
500  
600  
700  
800  
200  
300  
400  
500  
600  
0.9  
0.6  
0.5  
0.4  
0.3  
I
D
= I  
DSS  
700  
800  
900  
900  
0.8  
0.7  
0.6  
60°  
70°  
300°  
290°  
60°  
70°  
30  
29  
900  
800  
800  
900  
80°  
90°  
280°  
270°  
260°  
80°  
90°  
28  
27  
26  
700  
600  
500  
400  
I
D
= 0.25 I  
DSS  
700  
600  
500  
400  
0.3  
0.4  
0.5  
0.6  
100°  
100°  
100  
110°  
120°  
300  
250°  
240°  
110°  
120°  
25  
24  
200  
100  
300  
I
D
= I  
DSS  
200  
130°  
140°  
230°  
220°  
130°  
140°  
23  
22  
150°  
160°  
170°  
180°  
190°  
200°  
210°  
150°  
160°  
170°  
180°  
190°  
200°  
210°  
Figure 7. S21s  
Figure 8. S22s  
http://onsemi.com  
334  
BF245A BF245B  
COMMON GATE CHARACTERISTICS  
ADMITTANCE PARAMETERS  
(VDG = 15 Vdc, Tchannel = 25°C)  
0.5  
20  
0.3  
0.2  
10  
7.0  
5.0  
b
rg  
@ I  
DSS  
g
@ I  
DSS  
ig  
0.1  
0.07  
0.05  
3.0  
2.0  
g
rg  
@ 0.25 I  
DSS  
0.25 I  
DSS  
0.03  
0.02  
1.0  
0.7  
0.5  
b
ig  
@ I  
DSS  
0.01  
b
ig  
@ 0.25 I  
DSS  
g
ig  
@ I , 0.25 I  
DSS  
DSS  
0.3  
0.2  
0.007  
0.005  
10  
20 30  
50 70 100  
200 300  
1000  
10  
20 30  
50 70 100  
200 300  
1000  
500 700  
500 700  
f, FREQUENCY (MHz)  
f, FREQUENCY (MHz)  
Figure 9. Input Admittance (yig)  
Figure 10. Reverse Transfer Admittance (yrg)  
10  
1.0  
0.7  
0.5  
g
fg  
@ I  
DSS  
b
og  
@ I , 0.25 I  
DSS DSS  
7.0  
5.0  
3.0  
2.0  
g
fg  
@ 0.25 I  
0.3  
0.2  
DSS  
1.0  
0.1  
0.7  
0.5  
0.07  
0.05  
g
og  
@ I  
DSS  
b
fg  
@ I  
DSS  
0.3  
0.2  
0.03  
0.02  
b
rg  
@ 0.25 I  
DSS  
g
og  
@ 0.25 I  
DSS  
0.1  
0.01  
10  
20 30  
50 70 100  
200 300  
1000  
10  
20 30  
50 70 100  
200 300  
1000  
500 700  
500 700  
f, FREQUENCY (MHz)  
f, FREQUENCY (MHz)  
Figure 11. Forward Transfer Admittance (yfg)  
Figure 12. Output Admittance (yog)  
http://onsemi.com  
335  
BF245A BF245B  
COMMON GATE CHARACTERISTICS  
S–PARAMETERS  
(VDS = 15 Vdc, Tchannel = 25°C, Data Points in MHz)  
30°  
20°  
10°  
0°  
350°  
340°  
330°  
30°  
20°  
10°  
0°  
350°  
340°  
330°  
0.7  
40°  
50°  
40°  
50°  
320°  
310°  
0.04  
32  
31  
I
= 0.25 I  
DSS  
D
100  
200  
200  
300  
0.6  
100  
0.03  
0.02  
0.01  
0.0  
400  
500  
600  
700  
300  
DSS  
0.5  
400  
500  
600  
60°  
70°  
300°  
290°  
60°  
70°  
30  
29  
800  
900  
I
= I  
D
0.4  
0.3  
700  
80°  
90°  
280°  
270°  
260°  
80°  
90°  
28  
27  
26  
800  
900  
100  
500  
600  
600  
100°  
100°  
I
D
= 0.25 I  
DSS  
I
D
= I  
DSS  
700  
110°  
120°  
250°  
240°  
110°  
120°  
25  
24  
0.01  
700  
800  
800  
0.02  
0.03  
900  
130°  
140°  
230°  
220°  
130°  
140°  
23  
22  
900  
0.04  
150°  
30°  
160°  
20°  
170°  
180°  
190°  
200°  
210°  
150°  
30°  
160°  
20°  
170°  
180°  
190°  
200°  
210°  
330°  
Figure 13. S11g  
Figure 14. S12g  
10°  
0°  
350°  
340°  
330°  
10°  
0°  
1.5  
1.0  
350°  
300  
340°  
500  
0.5  
40°  
50°  
40°  
50°  
320°  
310°  
32  
31  
200  
400  
700  
100  
600  
100  
800  
900  
0.4  
0.9  
0.8  
0.7  
0.6  
I
D
= I  
DSS  
I
D
= I , 0.25 I  
DSS  
100  
DSS  
0.3  
0.2  
60°  
70°  
300°  
290°  
60°  
70°  
30  
29  
I
D
= 0.25 I  
DSS  
80°  
90°  
280°  
270°  
260°  
80°  
90°  
28  
27  
26  
0.1  
900  
900  
100°  
100°  
110°  
120°  
250°  
240°  
110°  
120°  
25  
24  
130°  
140°  
230°  
220°  
130°  
140°  
23  
22  
150°  
160°  
170°  
180°  
190°  
200°  
210°  
150°  
160°  
170°  
180°  
190°  
200°  
210°  
Figure 15. S21g  
Figure 16. S22g  
http://onsemi.com  
336  

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