Silicon N Channel MOSFET Tetrode
q
BF 995
For input and mixer stages in FM and VHF TV tuners
Type BF 995
Marking MB
Ordering Code (tape and reel) Q62702-F936
Pin Configuration 1 2 3 4 S D G2 G1
Package1) SOT-143
Maximum Ratings Parameter Drain-source voltage Drain current Gate 1/gate 2 peak source current Total power dissipation, TS < 76 ˚C Storage temperature range Channel temperature Thermal Resistance Junction - soldering point Rth JS < 370 K/W Symbol VDS ID
±
Values 20 30 10 200 150
Unit V mA mW
IG1/2SM
Ptot Tstg Tch
– 55 … + 150 ˚C
1)
For detailed information see chapter Package Outlines.
Semiconductor Group
1
07.94
BF 995
Electrical Characteristics at TA = 25 ˚C, unless otherwise specified. Parameter Symbol min. DC Characteristics Drain-source breakdown voltage ID = 10 µA, – VG1S = – VG2S = 4 V Gate 1 source breakdown voltage ± IG1S = 10 mA, VG2S = VDS = 0 Gate 2 source breakdown voltage ± IG2S = 10 mA, VG1S = VDS = 0 Gate 1 source leakage current ± VG1S = 5 V, VG2S = VDS = 0 Gate 2 source leakage current ± VG2S = 5 V, VG1S = VDS = 0 Drain current VDS = 15 V, VG1S = 0, VG2S = 4 V Gate 1 source pinch-off voltage VDS = 15 V, VG2S = 4 V, ID = 20 µA Gate 2 source pinch-off voltage VDS = 15 V, VG1S = 0, ID = 20 µA V(BR) DS
± ± ± ±
Values typ. max.
Unit
20 8.5 8.5 – – 4 – –
– – – – – – – –
– 14 14 50 50 20 2.5 2.0
V
V(BR) G1SS V(BR) G2SS IG1SS IG2SS
nA
IDSS – VG1S (p) – VG2S (p)
mA V
Semiconductor Group
2
BF 995
Electrical Characteristics at TA = 25 ˚C, unless otherwise specified. Parameter Symbol min. AC Characteristics Forward transconductance VDS = 15 V, ID = 10 mA, VG2S = 4 V, f = 1 kHz Gate 1 input capacitance VDS = 15 V, ID = 10 mA, VG2S = 4 V, f = 1 MHz Gate 2 input capacitance VDS = 15 V, ID = 10 mA, VG2S = 4 V, f = 1 MHz Feedback capacitance VDS = 15 V, ID = 10 mA, VG2S = 4 V, f = 1 MHz Output capacitance VDS = 15 V, ID = 10 mA, VG2S = 4 V, f = 1 MHz Power gain VDS = 15 V, ID = 10 mA f = 200 MHz, GG = 2 mS, GL = 0.5 mS 2 ∆f = 12 MHz (see test circuit 1) Noise figure VDS = 15 V, ID = 10 mA f = 200 MHz, GG = 2 mS, GL = 0.5 mS (see test circuit 1) Gain control range VDS = 15 V, VG2S = 4 … – 2 V, f = 200 MHz (see test circuit 1) Mixer gain (additive) VDS = 15 V, VG2S = 6 V, RS = 220 Ω f = 200 MHz, f IF = 36 MHz 2 ∆fIF = 5 MHz, Vosc = 0.5 V (see test circuit 2) Mixer gain (multiplicative) VDS = 15 V, VG1S = 1.7 V, VG2S = 2.5 V RS = 220 Ω, f = 200 MHz, f IF = 36 MHz 2 ∆fIF = 5 MHz, Vosc = 2 V (see test circuit 3) gfs Cg1ss Cg2ss Cdg1 Cdss Gps 12 – – – – – 17 3.6 1.6 25 1.6 23 – – – – – – fF pF dB mS pF Values typ. max. Unit
F
–
1.1
–
∆ Gps
–
50
–
Gpsc
–
16
–
Gpsc
–
18
–
Semiconductor Group
3
BF 995
Total power dissipation Ptot = f (TA)
Output characteristics ID = f (VDS) VG2S = 4 V
Gate 1 forward transconductance gfs1 = f (VG1S) VDS = 15 V, IDSS = 10 mA, f = 1 kHz
Gate 1 forward transconductance gfs1 = f (VG2S) VDS = 15 V, IDSS = 10 mA, f = 1 kHz
Semiconductor Group
4
BF 995
Drain current ID = f (VG1S) VDS = 15 V
Gate 1 input capacitance Cg1ss = f (VG1S) VG2S = 4 V, VDS = 15 V IDSS = 10 mA, f = 1 MHz
Gate 2 input capacitance C g2ss = f (VG2S) VG1S = 0 V, VDS = 15 V IDSS = 10 mA, f = 1 MHz
Output capacitance Cdss = f (VDS) VG1S = 0 V, VG2S = 4 V IDSS = 10 mA, f = 1 MHz
Semiconductor Group
5
BF 995
Gate 1 input admittance y11s VDS = 15 V, VG2S = 4 V (common source)
Gate 1 forward transfer admittance y21s VDS = 15 V, VG2S = 4 V (common source)
Output admittance y22s VDS = 15 V, VG2S = 4 V (common source)
Semiconductor Group
6
BF 995
Power gain Gps = f (VG2S) VDS = 15 V, VG1S = 0 V, IDSS = 10 mA f = 200 MHz (see test circuit 1)
Noise figure F = f (VG2S) VDS = 15 V, VG1S = 0 V, IDSS = 10 mA f = 200 MHz (see test circuit 1)
Interference voltage for 1% cross modulation Vint (1%) = f (∆Gps)1) VDS = 15 V, VG1S = 0, f = 200 MHz fint = 221 MHz (see test circuit 1)
Interference voltage for 1% cross modulation Vint (1%) = f (fint)1) VDS = 15 V, VG2S = 4 V, VG1S = 0 f = 200 MHz (see test circuit 1)
1)
For footnote refer to the last page of this data sheet.
Semiconductor Group
7
BF 995
Mixer gain (additive) Gpsc = f (Vosc) VD = 15 V, VG1S = 0, VG2S = 6 V RS = 220 Ω, IDSS = 10 mA, f = 200 MHz fIF = 36 MHz (see test circuit 2)
Mixer gain (additive) Gpsc = f (VG2S) VD = 15 V, VG1S = 0, RS = 220 Ω Vosc = 0.5 V, IDSS = 10 mA, f = 200 MHz fIF = 36 MHz (see test circuit 2)
Mixer gain (additive) Gpsc = f (RS) VD = 15 V, VG1S = 0, VG2S = 6 V Vosc = 0.5 V, f = 200 MHz f IF = 36 MHz (see test circuit 2)
Mixer gain (multiplicative) Gpsc = f (VG2S) VD = 15 V, VG1S = 1.7 V, RS = 200 Ω IDSS = 10 mA, f = 200 MHz f IF = 36 MHz (see test circuit 3)
Semiconductor Group
8
BF 995
Test circuit 1 for power gain, noise figure and cross modulation f = 200 MHz, GG = 2 mS, GL = 0.5 mS
Test circuit 2 for mixer gain (additive) f = 200 MHz, fosc = 236 MHz, 2 ∆f F = 5 MHz I
Semiconductor Group
9
BF 995
Test circuit 3 for mixer gain (multiplicative) f = 200 MHz, fosc = 236 MHz, 2 ∆fIF = 5 MHz
1)
Vint (1%) is the rms value of half the emf (terminal voltage at matching) of a 100 % sine modulated TV carrier at
an internal generator resistance of 60 Ω, causing 1 % amplitude modulation on the active carrier.
Semiconductor Group
10