Page 1
0.5 –6 GHz General Purpose
Gallium Arsenide FET
Technical Data
ATF-21186
Features
• Low Noise Figure:
0.5 dB Typ. @ 2 GHz
• High Output Power:
19 dBm Typ. P
• High MSG:
13.5 dB Typ. @ 2 GHz
• Low Cost Surface Mount
Plastic Package
• Tape-and-Reel Packaging
Option Available
Note:
1. Refer to “Tape-and-Reel Packaging for
Surface Mount Semiconductors”.
30
20
GAIN (dB)
10
0
0.1
ATF-21186 Insertion Power Gain,
Maximum Available Gain, and
Maximum Stable Gain vs. Frequency.
V
= 2 V, IDS = 15 mA.
DS
S
21
@ 2 GHz
1dB
[1]
MSG
FREQUENCY (GHz)
MAG
Description
Hewlett–Packard’s ATF-21186 is a
low cost Gallium Arsenide
Schottky barrier-gate field effect
transistor housed in a surface
mount plastic package. This
general purpose device is
designed for use in low noise
amplifiers, gain stages, driver
amplifiers, and oscillators
operating over the VHF, UHF, and
microwave frequency ranges.
High gain with two volt operation
makes this part attractive for low
voltage, battery operated systems.
The low noise figure is
appropriate for commercial
systems demanding good
sensitivity, such as GPS receiver
front-ends and MMDS television
receivers. The output power is
sufficient for use as the driver
stage in many hand-held
transceivers operating in the
900␣ MHz through 2.4 GHz bands,
including in cellular phones, PCN,
and ISM band spread spectrum
101
applications.
85 mil Plastic Surface Mount Package
Pin Configuration
4
SOURCE
DRAINGATE
1
211
2 SOURCE
This GaAs FET device has a
nominal 0.3 micron gate length
using airbridge interconnects
between drain fingers. Total gate
periphery is 750 microns. Proven
gold based metallization systems
and nitride passivation assure a
rugged, reliable device.
3
5-49
5965-8716E
Page 2
ATF-21186 Absolute Maximum Ratings
Symbol Parameter Units Absolute Maximum
V
DS
V
GS
V
GD
I
DS
P
T
T
CH
T
STG
Drain-Source Voltage V 5
Gate-Source Voltage V -4
Gate-Drain Voltage V -6
Drain Current mA I
Power Dissipation
[2,3]
m W 400
DSS
Channel Temperature ° C 150
Storage Temperature °C -65 to +150
Notes:
[1]
1. Operation of this device above any
one of these parameters may cause
permanent damage.
2. T
3. Derate at 4.4 mW/oC for TC␣>␣ 60oC.
= 25oC (T
CASE
be the temperature at the ends of
pins 2 and 4 where they contact the
circuit board).
CASE
is defined to
Thermal Resistance
ATF-21186 Electrical Specifications, T
[2]
: θjc = 225° C/W
= 25°C
A
Symbol Parameters and Test Conditions Units Min. Typ. Max.
NF
o
Optimum Noise Figure f = 1 GHz dB 0.4
VDS = 2 V, IDS = 15 mA f = 2 GH z 0.5 0.75
f = 4 GHz 0.6
G
A
Associated Gain f = 1 GHz dB 14.2
VDS = 2 V, IDS = 15 mA f = 2 GH z 12.0 12.6
f = 4 GHz 9.1
P
1 dB
Power at 1 dB Gain Compression f = 1 GHz dBm 19.0
VDS = 3 V, IDS = 70 mA f = 2 GH z 19.0
f = 4 GHz 18.0
G
1 dB
1 dB Compressed Gain f = 1 GHz dB 18.0
VDS = 3 V, IDS = 70 mA f = 2 GH z 14.0
f = 4 GHz 8.5
I
g
DSS
V
m
P
Transconductance VDS = 3 V, VGS = 0 V mS 70 120
Saturated Drain Current VDS = 3 V, VGS = 0 V m A 80 120 200
Pinchoff Voltage VDS = 3 V, IDS = 1 mA V -3.0 -1.5 -0.8
5-50
Page 3
ATF-21186 Typical Performance, T
1.5
G
A
1.0
O
NF (dB)
0.5
10 mA
15 mA
20 mA
0
0.1
FREQUENCY (GHz)
Figure 1. ATF-21186 Optimum Noise
Figure and Associated Gain vs.
Frequency and IDS, VDS = 2 V.
30
NF
O
20
2.0
A
G (dB)
10
0
101
1.5
1.0
NF (dB)
0.5
0
0
Figure 2. ATF-21186 Optimum Noise
Figure and Associated Gain vs. IDS,
f␣ =␣ 2 GHz, VDS = 2 V.
= 25° C
A
NF
I (mA)
DS
20
18
G
A
16
14
12
6010
50403020
A
G (dB)
30
20
1 dB
P (dBm)
10
0
0.1
P
1 dB
FREQUENCY (GHz)
30
20
1 dB
G (dB)
G
1 dB
10
0
101
Figure 3. ATF-21186 Power Output at
1 dB Compression and 1 dB
Compressed Gain vs. Frequency.
VDS␣=␣3 V, IDS = 70 mA.
30
20
GAIN (dB)
10
0
0.1
MSG
S
21
FREQUENCY (GHz)
MAG
101
Figure 4. ATF-21186 Insertion Power
Gain, Maximum Available Gain, and
Maximum Stable Gain vs. Frequency.
VDS = 2 V, IDS = 10 mA.
30
20
GAIN (dB)
10
0
0.1
MSG
S
21
FREQUENCY (GHz)
MAG
101
Figure 5. ATF-21186 Insertion Power
Gain, Maximum Available Gain, and
Maximum Stable Gain vs. Frequency.
VDS = 2 V, IDS = 20 mA.
30
MSG
20
S
GAIN (dB)
10
0
21
MAG
0.1
FREQUENCY (GHz)
101
Figure 6. ATF-21186 Insertion Power
Gain, Maximum Available Gain, and
Maximum Stable Gain vs. Frequency.
VDS = 3 V, IDS = 70 mA.
5-51
Page 4
ATF-21186 Typical Scattering Parameters,
Common Source, Z
Freq. S
(GHz) Mag. Ang. dB Mag. Ang. dB Mag. Ang. Mag. Ang. — (dB)
0.5 0.961 -25 11.12 3.599 157 -25.85 0.051 71 0.376 -25 0.22 18.5
1.0 0.910 -49 10.60 3.388 137 -20.36 0.096 57 0.360 -50 0.27 15.5
1.5 0.851 -73 9.96 3.149 118 -17.66 0.131 43 0.339 -73 0.33 13.8
2.0 0.794 -95 9.27 2.906 100 -16.03 0.158 31 0.314 -95 0.40 12.6
2.5 0.743 -118 8.53 2.671 83 -15.04 0.177 19 0.291 -118 0.47 11.8
3.0 0.694 -139 7.71 2.429 67 -14.52 0.188 9 0.272 -143 0.57 11.1
3.5 0.659 -160 6.85 2.201 52 -14.29 0.193 -1 0.270 -169 0.66 10.6
4.0 0.643 180 5.97 1.989 37 -14.29 0.193 -9 0.290 167 0.75 10.1
4.5 0.643 161 5.05 1.789 24 -14.38 0.191 -17 0.324 148 0.83 9.7
5.0 0.658 143 4.12 1.606 11 -14.66 0.185 -24 0.367 133 0.90 9.4
5.5 0.682 128 3.16 1.438 -1 -14.94 0.179 -29 0.410 121 0.95 9.0
6.0 0.707 115 2.19 1.286 -12 -15.29 0.172 -34 0.453 111 1.00 8.7
6.5 0.735 104 1.25 1.155 -23 -15.55 0.167 -38 0.490 102 1.02 7.5
7.0 0.758 95 0.32 1.038 -33 -15.81 0.162 -41 0.526 94 1.05 6.7
7.5 0.780 86 -0.59 0.934 -42 -15.97 0.159 -44 0.559 85 1.08 6.0
8.0 0.801 77 -1.49 0.842 -51 -16.08 0.157 -47 0.595 78 1.08 5.6
Note:
1. G
= MAG for K ≥ 1 and G
max
= 50 Ω, V
o
11
= 2 V, IDS = 10 mA
DS
S
21
= MSG for K < 1
max
S
12
S
22
KG
max
[1]
ATF-21186 Typical Noise Parameters,
Common Source, Z
Frequency F
GHz dB Mag. Ang. — dB
0.5 0.37 0.95 11 1.738 13.8
1.0 0.41 0.89 25 0.819 12.3
1.5 0.45 0.84 42 0.553 11.4
2.0 0.49 0.79 60 0.387 11.1
2.5 0.53 0.74 79 0.265 10.4
3.0 0.57 0.71 100 0.179 10.0
3.5 0.61 0.68 120 0.111 9.2
4.0 0.65 0.66 142 0.057 8.7
4.5 0.69 0.64 162 0.028 7.9
5.0 0.73 0.65 -175 0.021 7.4
5.5 0.77 0.68 -155 0.042 7.1
6.0 0.81 0.73 -139 0.095 6.6
6.5 0.85 0.77 -123 0.202 6.4
7.0 0.89 0.81 -111 0.362 6.1
7.5 0.93 0.84 -98 0.596 5.8
8.0 0.97 0.86 -88 0.873 5.4
= 50 Ω, V
o
min
= 2 V, ID = 10 mA
DS
Γ
opt
Rn/50 G
a
5-52
Page 5
ATF-21186 Typical Scattering Parameters,
Common Source, Z
Freq. S
(GHz) Mag. Ang. dB Mag. Ang. dB Mag. Ang. Mag. Ang. — (dB)
0.5 0.957 -27 12.56 4.248 156 -26.38 0.048 71 0.303 -28 0.22 19.5
1.0 0.898 -53 11.95 3.959 136 -21.11 0.088 57 0.291 -57 0.29 16.5
1.5 0.833 -77 11.19 3.627 116 -18.42 0.120 44 0.277 -82 0.37 14.8
2.0 0.772 -100 10.37 3.300 99 -16.89 0.143 32 0.261 -106 0.45 13.6
2.5 0.721 -123 9.52 2.992 82 -15.86 0.161 22 0.251 -132 0.53 12.7
3.0 0.675 -145 8.59 2.689 66 -15.34 0.171 12 0.247 -158 0.63 12.0
3.5 0.646 -165 7.65 2.413 51 -15.04 0.177 3 0.261 177 0.73 11.3
4.0 0.636 175 6.71 2.164 37 -14.90 0.180 -4 0.292 156 0.81 10.8
4.5 0.642 156 5.74 1.936 24 -14.90 0.180 -11 0.334 139 0.88 10.3
5.0 0.660 139 4.76 1.730 11 -14.99 0.178 -17 0.380 125 0.94 9.9
5.5 0.685 124 3.78 1.545 0 -15.09 0.176 -23 0.424 114 0.98 9.4
6.0 0.712 112 2.80 1.380 -11 -15.24 0.173 -27 0.466 106 1.01 8.5
6.5 0.739 102 1.86 1.239 -21 -15.39 0.170 -32 0.502 97 1.03 7.6
7.0 0.762 92 0.94 1.114 -31 -15.49 0.168 -36 0.537 89 1.04 6.9
7.5 0.783 84 0.04 1.005 -40 -15.55 0.167 -39 0.567 81 1.06 6.3
8.0 0.803 75 -0.84 0.908 -49 -15.60 0.166 -44 0.601 74 1.06 5.9
Note:
1. G
= MAG for K ≥ 1 and G
max
= 50 Ω, V
o
11
= 2 V, IDS = 15 mA
DS
S
21
= MSG for K < 1
max
S
12
S
22
KG
max
[1]
ATF-21186 Typical Noise Parameters,
Common Source, Z
Frequency F
GHz dB Mag. Ang. — dB
0.5 0.35 0.950 13 1.633 15.8
1.0 0.39 0.870 27 0.639 14.2
1.5 0.43 0.810 45 0.420 13.4
2.0 0.46 0.760 63 0.302 12.6
2.5 0.50 0.710 82 0.209 11.7
3.0 0.54 0.670 102 0.138 10.8
3.5 0.57 0.635 121 0.088 9.8
4.0 0.61 0.614 143 0.047 9.1
4.5 0.64 0.605 165 0.025 8.5
5.0 0.68 0.612 -172 0.022 8.0
5.5 0.72 0.650 -152 0.042 7.6
6.0 0.75 0.696 -136 0.088 7.2
6.5 0.79 0.742 -121 0.174 7.0
7.0 0.83 0.782 -109 0.301 6.6
7.5 0.86 0.810 -96 0.471 6.3
8.0 0.90 0.840 -86 0.715 6.0
= 50 Ω, V
o
min
= 2 V, ID = 15 mA
DS
Γ
opt
Rn/50 G
a
5-53
Page 6
ATF-21186 Typical Scattering Parameters,
Common Source, Z
Freq. S
(GHz) Mag. Ang. dB Mag. Ang. dB Mag. Ang. Mag. Ang. — (dB)
0.5 0.955 -29 13.44 4.698 156 -26.75 0.046 71 0.251 -32 0.23 20.1
1.0 0.888 -55 12.75 4.340 134 -21.51 0.084 57 0.246 -63 0.31 17.1
1.5 0.819 -80 11.91 3.938 115 -18.86 0.114 44 0.240 -91 0.40 15.4
2.0 0.756 -104 11.00 3.547 97 -17.33 0.136 33 0.233 -117 0.49 14.2
2.5 0.704 -127 10.07 3.186 80 -16.36 0.152 23 0.233 -143 0.58 13.2
3.0 0.662 -149 9.07 2.840 65 -15.76 0.163 14 0.242 -169 0.67 12.4
3.5 0.638 -170 8.07 2.532 50 -15.39 0.170 6 0.266 168 0.77 11.7
4.0 0.633 171 7.07 2.257 37 -15.19 0.174 -1 0.304 148 0.85 11.1
4.5 0.643 153 6.07 2.012 24 -15.14 0.175 -7 0.349 133 0.91 10.6
5.0 0.663 136 5.07 1.793 12 -15.09 0.176 -13 0.397 121 0.96 10.1
5.5 0.690 122 4.07 1.597 0 -15.14 0.175 -19 0.441 111 0.99 9.6
6.0 0.717 110 3.08 1.425 -10 -15.19 0.174 -24 0.482 103 1.01 8.4
6.5 0.744 100 2.14 1.280 -20 -15.24 0.173 -28 0.517 95 1.02 7.7
7.0 0.767 91 1.22 1.151 -29 -15.29 0.172 -33 0.550 87 1.04 7.1
7.5 0.788 83 0.34 1.040 -38 -15.29 0.172 -37 0.579 79 1.04 6.5
8.0 0.807 74 -0.54 0.940 -47 -15.34 0.171 -41 0.611 72 1.05 6.1
Note:
1. G
= MAG for K ≥ 1 and G
max
= 50 Ω, V
o
11
= 2 V, IDS = 20 mA
DS
S
21
= MSG for K < 1
max
S
12
S
22
KG
max
ATF-21186 Typical Noise Parameters,
Common Source, Z
= 50 Ω, V
o
= 2 V, ID = 20 mA
DS
[1]
Frequency F
min
Γ
opt
Rn/50 G
GHz dB Mag. Ang. — dB
0.5 0.33 0.95 13 1.543 16.1
1.0 0.37 0.88 28 0.659 14.6
1.5 0.41 0.82 46 0.423 13.8
2.0 0.45 0.77 64 0.294 12.8
2.5 0.48 0.70 83 0.191 12.0
3.0 0.52 0.65 103 0.124 11.0
3.5 0.56 0.62 123 0.079 10.0
4.0 0.59 0.60 146 0.042 9.4
4.5 0.63 0.59 168 0.024 8.7
5.0 0.67 0.60 -170 0.023 8.2
5.5 0.70 0.64 -150 0.044 7.7
6.0 0.74 0.68 -134 0.089 7.3
6.5 0.78 0.73 -118 0.176 7.0
7.0 0.81 0.77 -107 0.289 6.6
7.5 0.85 0.80 -96 0.446 6.3
8.0 0.89 0.83 -84 0.654 5.9
a
5-54
Page 7
ATF-21186 Typical Scattering Parameters,
Common Source, Z
Freq. S
(GHz) Mag. Ang. dB Mag. Ang. dB Mag. Ang. Mag. Ang. — (dB)
0.5 0.933 -34 17.12 7.181 152 -28.64 0.037 71 0.240 -34 0.28 22.9
1.0 0.841 -65 16.05 6.348 129 -23.74 0.065 57 0.222 -66 0.41 19.9
1.5 0.755 -92 14.80 5.493 109 -21.21 0.087 46 0.204 -93 0.53 18.0
2.0 0.688 -117 13.54 4.755 91 -19.74 0.103 38 0.188 -118 0.64 16.6
2.5 0.643 -140 12.33 4.135 75 -18.64 0.117 30 0.182 -145 0.73 15.5
3.0 0.613 -161 11.14 3.607 61 -17.92 0.127 23 0.186 -171 0.82 14.5
3.5 0.601 179 10.01 3.167 47 -17.33 0.136 17 0.209 165 0.91 13.7
4.0 0.608 161 8.94 2.799 35 -16.77 0.145 11 0.247 146 0.96 12.9
4.5 0.628 145 7.89 2.480 23 -16.36 0.152 6 0.293 131 0.99 12.1
5.0 0.657 130 6.85 2.201 11 -16.03 0.158 0 0.342 120 1.02 10.7
5.5 0.689 116 5.84 1.959 0 -15.76 0.163 -5 0.390 110 1.02 9.9
6.0 0.720 106 4.85 1.748 -10 -15.60 0.166 -11 0.434 103 1.03 9.2
6.5 0.750 96 3.90 1.567 -19 -15.39 0.170 -16 0.474 95 1.02 8.9
7.0 0.774 88 2.98 1.410 -29 -15.24 0.173 -21 0.510 87 1.01 8.4
7.5 0.797 80 2.08 1.271 -38 -15.09 0.176 -26 0.542 79 1.01 8.1
8.0 0.817 72 1.22 1.151 -46 -14.99 0.178 -31 0.578 72 1.00 8.1
Note:
1. G
= MAG for K ≥ 1 and G
max
= 50 Ω, V
o
11
= 3 V, IDS = 70 mA
DS
S
21
= MSG for K < 1
max
S
12
S
22
KG
max
[1]
ATF-21186 Typical Noise Parameters,
Common Source, Z
Frequency F
GHz dB Mag. Ang. — dB
0.5 0.40 0.94 16 1.510 19.5
1.0 0.44 0.84 34 0.565 18.0
1.5 0.49 0.74 53 0.322 16.5
2.0 0.54 0.67 72 0.223 15.0
2.5 0.59 0.61 92 0.153 13.7
3.0 0.63 0.57 115 0.098 12.7
3.5 0.68 0.55 137 0.060 11.7
4.0 0.73 0.54 162 0.034 11.0
4.5 0.78 0.55 -175 0.029 10.3
5.0 0.82 0.59 -155 0.045 9.6
5.5 0.87 0.63 -136 0.092 9.2
6.0 0.92 0.68 -121 0.167 8.7
6.5 0.97 0.73 -109 0.282 8.4
7.0 1.01 0.78 -98 0.466 8.0
7.5 1.06 0.82 -87 0.738 7.6
8.0 1.11 0.85 -78 1.089 7.3
= 50 Ω, V
o
min
= 3 V, ID = 70 mA
DS
Γ
opt
Rn/50 G
a
5-55
Page 8
Part Number Ordering Information
Devices
Part Number per Reel Reel Size
ATF-21186-TR1 1000 7 "'
ATF-21186-STR 10 strip
85 mil Plastic Surface Mount Package Dimensions
0.51 ± 0.13
(0.020 ± 0.005)
4
1.52 ± 0.25
(0.060 ± 0.010)
0.66 ± 0.013
(0.026 ± 0.005)
0.30 MIN
(0.012 MIN)
45°
1
2.67 ± 0.38
(0.105 ± 0.15)
DIMENSIONS ARE IN MILLIMETERS (INCHES)
211
2
5° TYP.
2.16 ± 0.13
(0.085 ± 0.005)
C
L
3
2.34 ± 0.38
(0.092 ± 0.015)
0.203 ± 0.051
(0.006 ± 0.002)
8° MAX
0° MIN
5-56
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