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SCA-14 Datasheet Preview

SCA-14 Datasheet

Cascadable GaAs HBT MMIC Amplifier

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Product Description
Stanford Microdevices’ SCA-14 is a high performance Gallium
Arsenide Heterojunction Bipolar Transistor MMIC Amplifier. A
Darlington configuration is utilized for broadband performance
up to 4 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 850 MHz with 65mA is
33.2 dBm.
SCA-14
PPrreelilmimininaarryy
DC-4 GHz, Cascadable
GaAs HBT MMIC Amplifier
NGA-589 Recommended for New Designs
These unconditionally stable amplifiers provide 20 dB of gain
and 17.7 dBm of 1dB compressed power and require only a
single positive voltage supply. Only 2 DC-blocking capacitors,
a bias resistor and an optional inductor are needed for
operation. This MMIC is an ideal choice for wireless applica-
tions such as cellular, PCS, CDPD, wireless data and SONET.
Small Signal Gain vs. Frequency @ ID=65mA
25
20
15
dB
10
5
Product Features
• High Output IP3: 33.2 dBm @ 850 MHz
• Cascadable 50 Ohm Gain Block
• Patented GaAs HBT Technology
• Operates From Single Supply
0
012345
Frequency GHz
Electrical Specifications
Symbol
Parameters: Test Conditions:
Z0 = 50 Ohms, ID = 65GmHAz, T = 25°C
P1dB
Output Power at 1dB Compression
6 Applications
• Cellular, PCS, CDPD, Wireless Data, SONET
f = 850 MHz
f = 1950 MHz
f = 2400 MHz
Units
dBm
dBm
dBm
Min.
Typ.
17.7
18.1
18.1
Max.
IP3
Third Order Intercept Point
Power out per tone = 0 dBm
f = 850 MHz
f = 1950 MHz
f = 2400 MHz
dBm
dBm
dBm
33.2
31.1
30.7
S21 Small Signal Gain
f = 850 MHz
f = 1950 MHz
f = 2400 MHz
dB 18
dB
dB
20.0
19.0
18.6
Bandwidth
S11
S22
(Determined by S11, S22 Values)
Input VSWR
Output VSWR
S12 Reverse Isolation
f = DC-4000 MHz
f = DC-4000 MHz
f = 850 MHz
f = 1950 MHz
f = 2400 MHz
MHz
-
-
dB
dB
dB
4000
1.4:1
1.8:1
22.7
22.5
22.2
NF Noise Figure, ZS = 50 Ohms
f = 1950 MHz
dB
4.0
VD Device Voltage
V 4.3 4.8 5.3
Rth,j-l Thermal Resistance (junction - lead)
o C/W
224
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 2000 Stanford Microdevices, Inc. All worldwide rights reserved.
522 Almanor Ave., Sunnyvale, CA 94085
Phone: (800) SMI-MMIC
http://www.stanfordmicro.com
1 EDS-101395 Rev A




Stanford Microdevices

SCA-14 Datasheet Preview

SCA-14 Datasheet

Cascadable GaAs HBT MMIC Amplifier

No Preview Available !

PPrreelilmimininaarryy
SCA-14 DC-4GHz Cascadable MMIC Amplifier
Absolute Maximum Ratings
Operation of this device above any one of these parameters
may cause permanent damage.
Bias Conditions should also satisfy the following expression:
IDVD (max) < (TJ - TOP)/Rth, j-l
Parameter
Supply Current
Operating Temperature
Maximum Input Power
Storage Temperature Range
Operating Junction Temperature
Value
120
-40 to +85
10
-40 to +150
+175
Unit
mA
C
dBm
C
C
Parameter
500 MHz
Gain
Noise Figure
Output IP3
Output P1dB
Input Return Loss
Isolation
850 MHz
Gain
Noise Figure
Output IP3
Output P1dB
Input Return Loss
Isolation
1950 MHz
Gain
Noise Figure
Output IP3
Output P1dB
Input Return Loss
Isolation
2400 MHz
Gain
Output IP3
Output P1dB
Input Return Loss
Isolation
Typical
25°C
20.2
3.9
32.3
17.5
14.0
22.6
20.0
4.0
33.2
17.7
13.7
22.7
19.0
4.0
31.1
18.1
15.8
22.4
18.6
30.7
18.1
18.7
22.2
Test Condition
Unit
(ID = 65 mA, unless otherwise noted)
dB
dB ZS = 50 Ohms
dBm Tone spacing = 1 MHz, Pout per tone = 0 dBm
dBm
dB
dB
dB
dB ZS = 50 Ohms
dBm Tone spacing = 1 MHz, Pout per tone = 0 dBm
dBm
dB
dB
dB
dB ZS = 50 Ohms
dBm Tone spacing = 1 MHz, Pout per tone = 0 dBm
dBm
dB
dB
dB
dBm Tone spacing = 1 MHz, Pout per tone = 0 dBm
dBm
dB
dB
*NOTE: While the SCA-4 can be operated at different bias currents, 65 mA is the recommended
bias for lower junction temperature and longer life. This reflects typical operating conditions
which we have found to be an optimal balance between high IP3 and MTTF. In general, MTTF
is improved to more than 100,000 hours when biasing at 65 mA and operating up to 85°C ambient
temperature.
522 Almanor Ave., Sunnyvale, CA 94085
Phone: (800) SMI-MMIC
2
http://www.stanfordmicro.com
EDS-101395 Rev A


Part Number SCA-14
Description Cascadable GaAs HBT MMIC Amplifier
Maker Stanford Microdevices
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