BF988 Vishay, BF988 Datasheet - Page 5

• Manufacturer Part Number: BF988
• Manufacturer: Vishay

Specifications of BF988

• Application: VHF/UHF
• Channel Type: N
• Channel Mode: Depletion
• Continuous Drain Current: 0.03A
• Drain Source Voltage (max): 12V
• Power Gain (typ)@vds: 28@8VdB
• Noise Figure (max): 1.5(Typ)dB
• Package Type: TO-50
• Pin Count: 4
• Forward Transconductance (typ): 0.024S
• Input Capacitance (typ)@vds: 2.1@8V@Gate 1/1.2@8V@Gate 2pF
• Output Capacitance (typ)@vds: 1.05@8VpF
• Reverse Capacitance (typ): 0.025@8VpF
• Operating Temp Range: -55C to 150C
• Mounting: Surface Mount
• Number Of Elements: 1
• Power Dissipation (max): 200mW
• Screening Level: Military
• Lead Free Status / Rohs Status: Compliant

Document Number 85007
Rev. 1.6, 15-Apr-05
12815
12818
12819
Figure 7. Output Capacitance vs. Drain Source Voltage
Figure 8. Transducer Gain vs. Gate 1 Source Voltage
Figure 9. Forward Transadmittance vs. Drain Current
–10
–20
–30
–40
–50
4.0
3.2
2.4
1.6
0.8
0.0
32
28
24
20
16
12
10
8
4
0
0
–1.0
0
2
f = 800 MHz
V
f = 1 MHz
DS
4
0
V
–0.5
= 8 V
V
G1S
4
DS
I
8
D
– Drain Source Voltage ( V )
– Gate 1 Source Voltage ( V )
– Drain Current ( mA )
0.0
6
12
1 V
16
0.5
8
V
V
V
f = 1 MHz
20
G2S
G2S
G1S
V
G2S
1.0
10
= 4 V
= –0.8 V
= 0
24
–0.2 V
–0.4 V
= 4 V
2 V
3 V
4 V
3 V
1 V
2 V
0
1.5
28
12
12820
12821
12822
Figure 11. Short Circuit Forward Transfer Admittance
–10
–15
–20
–25
–30
–35
–40
20
18
16
14
12
10
–5
8
6
4
2
0
5
0
9
8
7
6
5
4
3
2
1
0
0.00
0
0
Figure 12. Short Circuit Output Admittance
Figure 10. Short Circuit Input Admittance
f = 100...1300 MHz
20 mA
100 MHz
4
100 MHz
V
0.25
V
2
400 MHz
G2S
DS
10 mA
I
= 8 V
8
400 MHz
D
= 4 V
700 MHz
1300 MHz
4
= 5 mA
0.50
f = 1300 MHz
12
Re (y
Re (y
Re (y
f = 1300 MHz
6
700 MHz
0.75
11
16
21
22
Vishay Semiconductors
1000 MHz
f = 100...1300 MHz
) ( mS )
) ( mS )
) ( mS )
f = 100...1300 MHz
8
1000 MHz
20
1000 MHz
V
I
1.00
V
V
I
V
D
D
G2S
DS
G2S
DS
= 10 mA
10
f = 100 MHz
=10 mA
24
= 15 V
= 8 V
= 4 V
= 4 V
700 MHz
400 MHz
1.25
12
28
1.50
14
32
BF988
www.vishay.com
5