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Product Description
Stanford Microdevices' SCA-15 is a high performance Gallium Arsenide Hetrojunction Bipolar Transistor MMIC Amplifier. A Darlington configuration is utilized for broadband performance up to 3 GHz. The heterojunction increases breakdown voltage and minimizes leakage current between junctions. Cancellation of emitter junction non-linearities results in higher suppression of intermodulation products. Typical IP3 at 50mA is +27dBm. These unconditionally stable amplifiers provides up to 12dB of gain and +13.5dBm of 1dB compressed power and requires only a single positive voltage supply. Only 2 DCblocking capacitors, a bias resistor and an optional inductor are needed for operation. This MMIC is an ideal choice for wireless applications such as cellular, PCS, CDPD, wireless data and SONET.
SCA-15
DC-3 GHz, Cascadable GaAs HBT MMIC Amplifier
Output IP3 vs. Frequency
30 28 26
Product Features * High Output IP3 : +27dBm * Flat Gain : +/- 0.5dB Over Full Band * Cascadable 50 Ohm : 1.5:1 VSWR * Patented GaAs HBT Technology * Operates From Single Supply * Low Thermal Resistance Package 50 Ohm Gain Blocks Applications * Cellular, PCS, CDPD * Wireless Data, SONET
dBm
24 22 20 0.1 1 2 3
GHz
Electrical Specifications at Ta = 25C
Sym bol P a r a m e te r s : T e s t C o n d itio n s : Id = 5 0 m A , Z 0 = 5 0 O h m s U n its M in . Ty p . M ax.
G
P
P o w e r G a in G a in F la t n e s s G a in F la t n e s s o v e r a n y 1 0 0 M H z b a n d O u t p 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 r e In p u t a n d O u tp u t V S W R T h ir d O r d e r I n t e r c e p t P o in t O u tp u t To n e @ 0 d B m 1 0 M H z A p a r t G r o u p D e la y R e v e r s e I s o la t io n D e v ic e V o lt a 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 lt a g e T e m p e r a t u r e C o e ff ic ie n t
f = 0 .1 -2 .0 G H z f = 2 .0 -3 .0 G H z f = 0 .1 -2 .0 G H z f = 0 .1 -2 .0 G H z f = 0 .1 -3 .0 G H z f = 0 .1 -3 .0 G H z f = 0 .1 -2 .0 G H z f = 1 .9 G H z f = 0 .1 -3 .0 G H z
dB dB dB dB dBm dB
10
12 11 + /- 0 . 5 + /- 0 . 1 1 3 .5 6 .0 1 .5 2 7 .0 100 16
G P
F
1dB
NF VSW R IP T
dBm psec dB V d B /d e g C m V /d e g C 3 .5
3
D
IS O L VD d G /d T d V /d T
4 .0 0 .0 0 1 5 -4 .0
4 .5
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
5-145
SCA-15 DC-3 GHz Cascadable MMIC Amplifier
Typical Performance at 25 C (Vds = 4.0V, Ids = 50mA)
|S11| vs. Frequency
0 -5 16
|S21| vs. Frequency
14
dB
-10 -15 -20 0.1 1 2 3
dB
12
10 0.1 1 2 3
GHz
GHz
|S12| vs. Frequency
-10 -12 -14 0 -5
|S22| vs. Frequency
dB
-16 -18 -20 0.1 1 2 3
dB
-10 -15 -20 0.1 1 2 3
GHz
GHz
50 Ohm Gain Blocks
Freq GHz .100 .500 .900 1.00 1.50 2.00 2.50 3.00 |S11|
Output Power vs. Frequency
16 15
dBm
14 13 12 0.1 1 2 3
GHz
Typical S-Parameters Vds = 4.0V, Id = 50mA
S11 Ang |S21| S21 Ang |S12| S12 Ang |S22| S22 Ang
0.284 0.297 0.320 0.327 0.354 0.360 0.344 0.307
125 119 73 62 8 -44 -97 -152
4.182 4.170 4.042 4.025 3.948 3.983 3.777 3.618
152 138 107 98 60 21 -20 -55
0.143 0.139 0.135 0.136 0.133 0.130 0.133 0.137
-24 -33 -58 -64 -96 -125 -157 -167
0.235 0.249 0.276 0.285 0.319 0.338 0.339 0.320
131 119 75 63 10 -43 -97 -151
(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
5-146
SCA-15 DC-3 GHz Cascadable MMIC Amplifier
Absolute Maximum Ratings
P a r a m e te r D e v ic e C u r r e n t P o w e r D is s ip a tio n R F In p u t P o w e r J u n c tio n Te m p e r a tu r e O p e r a tin g Te m p e r a tu re S to r a g e Te m p e r a t u r e A b s o lu te M a x im u m 75m A 350m W 100m W +200C - 4 5 C to + 8 5 C - 6 5 C to + 1 5 0 C
+120C 10,000 +55C 1,000,000
MTTF vs. Temperature @ Id = 100mA
Lead Temperature MTTF (hrs)
+90C
100,000
Thermal Resistance (Lead-Junction): 510 C/W
Notes:
1. Operation of this device above any one of these parameters may cause permanent damage.
Recommended Bias Resistor Values Supply Voltage (Vs) Rbias (Ohms) 5V 20 7.5V 70 9V 100 12V 160 15V 220 20V 320
Mounting Instructions
The data shown was taken on a 31mil thick FR-4 board with 1 ounce of copper on both sides. The board was mounted to a baseplate with 3 screws as shown. The screws bring the top side copper temperature to the same value as the baseplate. 1. Use 1 or 2 ounce copper, if possible. 2. Solder the copper pad on the backside of the device package to the ground plane. 3. Use a large ground pad area with many plated through-holes as shown. 4. If possible, use at least one screw no more than 0.2 inch from the device package to provide a low thermal resistance path to the baseplate of the package. 5. Thermal resistance from ground lead to screws is 2 deg. C/W. Typical Biasing Configuration
50 Ohm Gain Blocks
Pin Designation 1 2 3 4 RF in GND RF out and Bias GND
Outline Drawing 1 2 4 3
SCA-15
522 Almanor Ave., Sunnyvale, CA 94086
Phone: (800) SMI-MMIC
http://www.stanfordmicro.com
5-147

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