Product Description
Stanford Microdevices’ SNA-476 is a GaAs monolithic
broadband amplifier (MMIC) housed in a low-cost surface
mountable stripline ceramic package. This amplifier
provides 13dB of gain when biased at 70mA and 5.0V.
External DC decoupling capacitors determine low
frequency response. The use of an external resistor
allows for bias flexibility and stability.
These unconditionally stable amplifiers are designed for
use as general purpose 50 ohm gain blocks. Also available
in chip form (SNA-400), its small size (0.4mm x 0.4mm) and
gold metallization, make it an ideal choice for use in hybrid
circuits.
The SNA-476 is available in tape and reel at 1000, 3000 and
5000 devices per reel.
SNA-476
DC-8 GHz, Cascadable
GaAs MMIC Amplifier
Output Power vs. Frequency
22
20
Product Features
•
Cascadable 50 Ohm Gain Block
•
13dB Gain, +17dBm P1dB
•
1.5:1 Input and Output VSWR
•
Operates From Single Supply
•
Low Cost Stripline Mount Ceramic Package
•
Hermetically Sealed
50 Ohm Gain Blocks
Applications
•
Narrow and Broadband Linear Amplifiers
•
Commercial and Industrial Applications
dBm
18
16
14
0.1
0.5
1
1.5
2
4
6
8
10
GHz
Electrical Specifications at Ta = 25C
Sym bol
P a r a m e te rs : T e s t C o n d itio n s :
Id = 7 0 m A , Z
0
= 5 0 O h m s
S m a l l S i g n a l P o w e r G a in
f = 0 .1 -2 .0 G H z
f = 2 .0 -6 .0 G H z
f = 6 .0 -8 .0 G H z
f = 0 .1 -6 .0 G H z
U n its
dB
dB
dB
dB
G H z
f = 2 .0 G H z
f = 2 .0 G H z
f = 0 .1 -8 .0 G H z
f = 2 .0 G H z
f = 2 .0 G H z
f = 0 .1 -8 .0 G H z
dBm
psec
dB
V
d B /d e g C
m V /d e g C
4 .3
dBm
dB
M in .
11 .0
1 0 .0
9 .0
Ty p .
1 3 .0
1 2 .0
11 .0
+ /- 1 .0
8 .0
1 7 .0
5 .5
1 .5 :1
3 4 .0
120
1 8 .0
5 .0
-0 .0 0 2 7
-5 .0
5 .7
6 .0
M ax.
G
P
G
F
G a in F la tn e s s
3 d B B a n d w id th
O u tp u t P o w e r a t 1 d B C o m p r e s s io n
N o is e F ig u re
In p u t / O u tp u t
T h ir d O rd e r In te r c e p t P o in t
G r o u p D e la y
R e v e r s e I s o la t i o n
D e v ic e V o lta g e
D e v ic e G a in T e m p e r a t u r e C o e ff ic ie n t
D e v ic e V o lta g e Te m p e r a t u r e C o e ff ic ie n t
BW 3dB
P
1dB
N F
VSW R
IP
T
3
D
IS O L
VD
d G /d T
d V /d T
The information provided herein is believed to be reliable at press time. Stanford Microdevices assumes no responsibility for inaccuracies or omissions.
Stanford Microdevices assumes no responsibility for the use of this information, and all such information shall be entirely at the user’s own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. Stanford Microdevices does not authorize or warrant any Stanford
Microdevices product for use in life-support devices and/or systems.
Copyright 1999 Stanford Microdevices, Inc. All worldwide rights reserved.
522 Almanor Ave., Sunnyvale, CA 94086
Phone: (800) SMI-MMIC
http://www.stanfordmicro.com
5-57
SNA-476 DC-8 GHz Cascadable MMIC Amplifier
Typical Performance at 25
°
C (Vds = 5.0V, Ids = 70mA)
|S11| vs. Frequency
0
-5
-10
|S21| vs. Frequency
16
14
dB
-15
-20
-25
0.1
0.5
1
1.5
2
4
6
8
10
dB
12
10
8
0.1
0.5
1
1.5
2
4
6
8
10
GHz
GHz
|S12| vs. Frequency
0
-5
-10
0
-5
-10
|S22| vs. Frequency
dB
-15
-20
-25
0.1
0.5
1
1.5
2
4
6
8
10
dB
-15
-20
-25
0.1
0.5
1
1.5
2
4
6
8
10
GHz
GHz
50 Ohm Gain Blocks
Noise Figure vs. Frequency
7
38
36
6
34
32
30
4
0.1
2.0
4.0
6.0
8.0
28
0.1
0.5
TOIP vs. Frequency
dB
5
dBm
1
1.5
2
4
6
8
10
GHz
GHz
Typical S-Parameters Vds = 5.0V, Id = 70mA
Freq GHz
.100
.250
.500
1.00
1.50
2.00
4.00
6.00
8.00
|S11|
0.205
0.233
0.282
0.295
0.302
0.290
0.150
0.164
0.275
S11 Ang
148
136
120
64
6
-46
74
-52
161
|S21|
5.268
5.124
4.891
4.793
4.746
4.774
3.740
3.331
2.973
S21 Ang
176
166
139
101
60
21
57
61
-109
|S12|
0.112
0.111
0.119
0.118
0.117
0.117
0.104
0.151
0.100
S12 Ang
0
9
-29
-55
-87
-113
7
-2
-115
|S22|
0.141
0.157
0.185
0.207
0.227
0.231
0.222
0.130
0.190
S22 Ang
160
150
121
68
13
-37
-90
1
147
(S-Parameters include the effects of two 1.0 mil diameter bond wires, each 20 mils long, connected to the gate and drain pads on the die)
522 Almanor Ave., Sunnyvale, CA 94086
Phone: (800) SMI-MMIC
http://www.stanfordmicro.com
5-58
SNA-476 DC-8 GHz Cascadable MMIC Amplifier
Absolute Maximum Ratings
P a r a m ete r
A b s o lu te
M a xim u m
Part Number Ordering Information
Part Number
Devices Per Reel
Reel Size
SNA-476-TR1
D e vic e C urre nt
Po w e r D issipa tion
R F In p ut Po w er
Ju n ction Te m p e ra ture
O p e ra tin g Te m p e ra tu re
Sto ra g e Te m pe ra tu re
1 0 0m A
5 6 0m W
2 0 0m W
+2 0 0 C
-4 5 C to +8 5 C
-6 5 C to +1 5 0 C
SNA-476-TR2
SNA-476-TR3
1000
3000
5000
7"
13"
13"
R e c o m m e n d e d B ia s R e s is to r Va lu e s
Notes:
1. Operation of this device above any one of these
parameters may cause permanent damage.
Supply
Voltage(V s)
R bias (O hm s)
5V
*
7.5V
36
9V
57
12V
100
15V
143
20V
214
* Needs active biasing for constant current source
MTTF vs. Temperature @ Id = 70mA
Lead Temperature
Junction
Temperature
+155C
MTTF (hrs)
6.0
+45C
1000000
+80C
+190C
100000
5.0
+110C
+220C
10000
50 Ohm Gain Blocks
Thermal Resistance (Lead-Junction): 315° C/W
Typical Biasing Configuration
Pin Designation
1
2
3
4
RF in
GND
RF out and
Bias
GND
Typical Performance at 25° C
Power Gain vs. Device Current
14
13
12
5.5
5
90mA
Device Voltage vs. Id
dB
11
10
Vdc
4.5
80mA
70mA
4
3.5
45
50
60
65
70
75
80
50mA
60mA
9
2
4
6
8
GHz
mA
522 Almanor Ave., Sunnyvale, CA 94086
Phone: (800) SMI-MMIC
http://www.stanfordmicro.com
5-59
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