DATA SHEET
HETERO JUNCTION FIELD EFFECT TRANSISTOR
NE32484A
C to Ku BAND SUPER LOW NOISE AMPLIFIER
N-CHANNEL HJ-FET
DESCRIPTION
The NE32484A is a Hetero Junction FET that utilizes the
hetero junction to create high mobility electrons. Its excellent
low noise and high associated gain make it suitable for DBS,
TVRO and another commercial systems.
PACKAGE DIMENSIONS
(Unit: mm)
1.78 ±0.2
1
L
L
FEATURES
• Super Low Noise Figure & High Associated Gain
• Gate Length : L
g
≤
0.25
µ
m
• Gate Width : W
g
= 200
µ
m
1.78 ±0.2
NF = 0.6 dB TYP., Ga = 11.0 dB TYP. at f = 12 GHz
T
2
L
3
L
4
ORDERING INFORMATION
SUPPLYING
FORM
STICK
Tape & reel
1000 pcs./reel
NE32484A-T1A
Tape & reel
5000 pcs./reel
L = 1.0
±
0.2 mm
PART NUMBER
NE32484A-SL
NE32484A-T1
LEAD LENGTH
L = 1.7 mm MIN.
L = 1.0
±
0.2 mm
MARKING
T
ABSOLUTE MAXIMUM RATINGS (T
A
= 25 ˚C)
Drain to Source Voltage
Gate to Source Voltage
Drain Current
Gate Current
Total Power Dissipation
Channel Temperature
Storage Temperature
V
DS
V
GS
I
D
I
G
P
tot
T
ch
T
stg
4.0
–3.0
I
DSS
100
165
150
–65 to +150
V
V
mA
1.
2.
3.
4.
Source
Drain
Source
Gate
µ
A
mW
˚C
˚C
RECOMMENDED OPERATING CONDITION (T
A
= 25 ˚C)
CHARACTERISTIC
Drain to Source Voltage
Drain Current
Input Power
SYMBOL
V
DS
I
D
P
in
MIN.
TYP.
2
10
MAX.
3
20
0
Unit
V
mA
dBm
Document No. P11785EJ3V0DS00 (3rd edition)
(Previous No. TC-2316)
Date Published July 1996 P
Printed in Japan
©
0.1
1.7 MAX.
0.5 TYP.
0.5 TYP.
1991
NE32484A
ELECTRICAL CHARACTERISTICS (T
A
= 25 ˚C)
CHARACTERISTIC
Gate to Source Leak Current
Saturated Drain Current
Gate to Source Cutoff Voltage
Transconductance
Noise Figure
Associated Gain
SYMBOL
I
GSO
I
DSS
V
GS(off)
g
m
NF
Ga
10.0
15
–0.2
45
MIN.
TYP.
0.5
40
–0.8
60
0.6
11.0
0.7
MAX.
10
70
–2.0
UNIT
TEST CONDITIONS
V
GS
= –3 V
V
DS
= 2 V, V
GS
= 0 V
V
DS
= 2 V, I
D
= 100
µ
A
V
DS
= 2 V, I
D
= 10 mA
V
DS
= 2 V, I
D
= 10 mA,
f = 12 GHz
µ
A
mA
V
mS
dB
dB
TYPICAL CHARACTERISTICS (T
A
= 25 ˚C)
TOTAL POWER DISSIPATION vs.
AMBIENT TEMPERATURE
250
P
tot
- Total Power Dissipation - mW
50
I
D
- Drain Current - mA
200
40
30
20
10
–0.4 V
–0.6 V
DRAIN CURRENT vs.
DRAIN TO SOURCE VOLTAGE
V
GS
= 0 V
–0.2 V
150
100
50
0
50
100
150
200
250
0
1
2
3
4
5
T
A
- Ambient Temperature - ˚C
DRAIN CURRENT vs.
GATE TO SOURCE VOLTAGE
MSG. - Maximum Stable Gain - dB
MAG. - Maximum Available Gain - dB
|S
21s
|
2
- Forward Insertion Gain - dB
50
V
DS
= 2 V
I
D
- Drain Current - mA
40
24
V
DS
- Drain to Source Voltage - V
MAXIMUM AVAILABLE GAIN, FORWARD
INSERTION GAIN vs. FREQUENCY
V
DS
= 2 V
I
D
= 10 mA
20
MSG.
16
|S21
S
|
2
12
MAG.
30
20
10
0
–2.0
8
4
1
2
4
6
8 10 14
20
30
f - Frequency - GHz
–1.0
V
GS
- Gate to Source Voltage - V
0
Gain Calculations
| S
21
|
| S
12
|
| S
21
|
K
±
K
2
−
1
| S
12
|
K
=
1
+
|
∆
|
2
−
| S
11
|
2
−
| S
22
|
2
2 | S
12
|| S
21
|
MSG. =
MAG.
=
(
)
∆
=
S
11
⋅
S
22
−
S
21
⋅
S
12
2
NE32484A
NOISE FIGURE, ASSOCIATED GAIN vs.
RATIO OF DRAIN CURRENT TO ZERO-GATE
VOLTAGE CURRENT
24
V
DS
= 2 V
I
D
= 10 mA
Ga - Associated Gain - dB
NF - Noise Figure - dB
NOISE FIGURE, ASSOCIATED GAIN vs.
FREQUENCY
5
3
V
DS
= 2 V
f = 12 GHz
15
20
2
Ga
10
1
NF
5
0
4
0
40 60 100
Ga - Associated Gain - dB
4
NF - Noise Figure - dB
Ga
3
16
2
12
1
NF
0
1
2
4
6
8 10 14
20
30
8
1
2
4
6 8 10
20
I
DS
/I
DSS
- Ratio of Drain Current to Zero-Gate Voltage Current - %
f - Frequency - GHz
3
NE32484A
S-Parameters
V
DS
= 2 V, I
D
= 10 mA
START 500 MHz, STOP 18 GHz, STEP 500 MHz
Marker
1: 4 GHz
2: 8 GHz
3: 12 GHz
4: 16 GHz
5: 18 GHz
S
11
1.0
0.5
2.0
+135˚
S
12
+90˚
+45˚
0
0.5
5
4
3
3
1.0
2.0
∞
±180˚
1 2
4
5
0
2
–0.5
–1.0
1
–2.0
Rmax. = 1
–135˚
–90˚
–45˚
Rmax. = 0.25
S
21
+90˚
+135˚
1
2
3
±180˚
0
0
0.5
4
4
5
5
3
+45˚
0.5
S
22
1.0
2.0
1.0
2.0
∞
2
–135˚
–90˚
–45˚
Rmax. = 5
–0.5
–1.0
1
–2.0
Rmax. = 1
4
NE32484A
S-Parameters
MAG. AND ANG.
V
DS
= 2 V, I
D
= 10 mA
FREQUENCY
MHz
MAG.
S
11
ANG.
(deg.)
500
1 000
1 500
2 000
2 500
3 000
3 500
4 000
4 500
5 000
5 500
6 000
6 500
7 000
7 500
8 000
8 500
9 000
9 500
10 000
10 500
11 000
11 500
12 000
12 500
13 000
13 500
14 000
14 500
15 000
15 500
16 000
16 500
17 000
17 500
18 000
.999
.990
.976
.952
.934
.908
.884
.858
.830
.802
.775
.746
.725
.702
.681
.659
.645
.625
.609
.592
.574
.556
.539
.526
.511
.499
.487
.476
.463
.449
.433
.420
.404
.385
.373
.357
–8.3
–16.6
–24.9
–32.7
–40.5
–48.2
–55.8
–63.1
–70.5
–77.5
–84.5
–91.0
–97.4
–103.5
–109.2
–114.3
–119.4
–124.2
–128.9
–134.2
–139.4
–144.6
–149.9
–155.7
–161.1
–166.2
–171.1
–175.9
179.9
175.4
169.9
164.6
158.5
151.0
143.6
135.1
4.699
4.678
4.611
4.508
4.424
4.328
4.222
4.127
4.022
3.906
3.793
3.669
3.552
3.426
3.324
3.223
3.126
3.050
2.984
2.921
2.868
2.812
2.759
2.705
2.645
2.595
2.543
2.496
2.464
2.441
2.408
2.383
2.377
2.365
2.350
2.321
MAG.
S
21
ANG.
(deg.)
171.5
162.9
154.1
146.0
138.0
130.0
122.2
114.7
107.2
99.9
92.7
85.8
79.0
72.7
66.3
60.1
54.4
48.4
43.1
37.1
31.5
25.7
20.0
14.5
8.3
3.1
–2.3
–8.2
–13.6
–19.5
–24.6
–30.5
–36.4
–42.3
–48.6
–55.0
.009
.019
.027
.035
.043
.051
.056
.062
.067
.072
.075
.078
.081
.083
.085
.088
.090
.092
.094
.097
.098
.100
.101
.102
.105
.107
.110
.113
.115
.120
.122
.125
.130
.134
.135
.143
MAG.
S
12
ANG.
(deg.)
81.1
78.1
73.5
67.5
61.4
58.8
53.8
48.5
44.5
40.4
36.3
32.6
29.6
27.2
24.9
21.9
19.9
17.3
15.6
14.1
11.3
9.6
6.7
6.1
4.1
1.9
–.5
–1.6
–4.0
–7.4
–9.9
–13.0
–16.5
–19.2
–22.7
–26.3
.667
.663
.654
.641
.626
.612
.598
.576
.559
.538
.516
.497
.481
.470
.460
.454
.450
.450
.449
.441
.433
.429
.424
.423
.421
.429
.439
.448
.460
.468
.484
.486
.489
.499
.507
.518
MAG.
S
22
ANG.
(deg.)
–6.2
–12.3
–18.2
–24.2
–29.7
–35.8
–41.2
–47.1
–52.9
–58.7
–64.7
–70.9
–76.7
–82.9
–88.3
–93.6
–99.5
–104.7
–109.8
–116.2
–121.4
–128.7
–134.1
–139.5
–146.5
–153.1
–157.9
–163.5
–168.9
–174.1
–179.4
175.2
170.6
164.2
158.1
152.3
5
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