BF988 Vishay, BF988 Datasheet - Page 4

• 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

BF988
Vishay Semiconductors
Typical Characteristics (Tamb = 25 °C unless otherwise specified)
www.vishay.com
4
96 12159
12812
12816
Figure 1. Total Power Dissipation vs. Ambient Temperature
300
250
200
150
100
50
30
25
20
15
10
Figure 3. Drain Current vs. Gate 1 Source Voltage
20
16
12
Figure 2. Drain Current vs. Drain Source Voltage
0
5
0
8
4
0
–0.8
0
0
V
G2S
V
20
T
DS
amb
V
–0.4
V
= 4 V
= 8 V
G1S
2
DS
40
- Ambient Temperature ( °C )
– Drain Source Voltage ( V )
– Gate 1 Source Voltage ( V )
4 V
60
5 V
0.0
6 V
4
80 100 120 140 160
0.4
6
V
V
G1S
G2S
3 V
0.8
2 V
8
= 0.6 V
= –1 V
–0.2 V
–0.4 V
0.2 V
0.4 V
1 V
0
0
1.2
10
Figure 5. Gate 1 Input Capacitance vs. Gate 1 Source Voltage
Figure 6. Gate 2 Input Capacitance vs. Gate 2 Source Voltage
12817
12813
12814
2.8
2.4
2.0
1.6
1.2
0.8
0.4
0.0
20
16
12
Figure 4. Drain Current vs. Gate 2 Source Voltage
2.8
2.4
2.0
1.6
1.2
0.8
0.4
0.0
8
4
0
–0.6
–2.0 –1.5 –1.0 –0.5 0.0
–1
V
V
V
V
V
f = 1 MHz
f = 1 MHz
DS
G2S
DS
G1S
DS
V
V
V
–0.2
0
= 8 V
G2S
G1S
G2S
= 8 V
= 8 V
= 4 V
= 0
– Gate 2 Source Voltage ( V )
– Gate 1 Source Voltage ( V )
– Gate 2 Source Voltage ( V )
1
0.2
2
0.6
5 V
3
0.5
V
4 V
G1S
1.0
Document Number 85007
1.0
4
= –1 V
3 V
1 V
2 V
0
1.5
1.4
Rev. 1.6, 15-Apr-05
5