Preliminary
Product Description
Stanford Microdevices’ SGA-1263 is a Silicon Germanium
HBT Heterostructure Bipolar Transistor (SiGe HBT) amplifier
that offers excellent isolation and flat gain response for
applications to 4 GHz.
This RFIC is a 2-stage design that provides high isolation of
up to 40dB at 2 GHz and is fabricated using the latest SiGe
HBT 50 GHz F
T
process, featuring 1 micron emitters with
Vceo > 7V.
These unconditionally stable amplifiers have less than 1dB
gain drift over 125ºC operating range (-40C to +85C) and
are ideal for use as buffer amplifiers in oscillator applica-
tions covering cellular, ISM and narrowband PCS bands.
Isolation vs. Frequency
0
-2 0
SGA-1263
DC-4000 MHz Silicon Germanium
HBT Cascadeable Gain Block
Product Features
•
DC-4000 MHz Operation
•
Single Supply Voltage
•
Excellent Isolation, >50 dB at 900 MHz
•
50 Ohms In/Out, Broadband Match for Operation
from DC-4 GHz
•
Unconditionally Stable
dB
-4 0
-6 0
-8 0
100
500
900
1900
2400
3500
6000
Frequency MHz
Parameters: Test Conditions:
Z
0
= 50 Ohms, Id = 8 mA, T = 25ºC
Output Power at 1dB Compression
Applications
•
Buffer Amplifier for Oscillator Applications
•
Broadband Gain Blocks
•
IF Amp
Units
f = 850 MHz
f = 1950 MHz
f = DC - 1000 MHz
f = 1000 - 2000 MHz
f = 2000 - 4000 MHz
f = DC - 1000 MHz
f = 1000 - 2000 MHz
f = 2000 - 4000 MHz
f = DC - 2400 MHz
f = 2400 - 4000 MHz
f = DC - 2400 MHz
f = 2400 - 4000 MHz
f = 850 MHz
f = 1950 MHz
f = DC - 1000 MHz
f = 1000 - 2400 MHz
f = 1000 MHz
dB m
dB m
dB
dB
dB
dB
dB
dB
-
-
dB m
dB m
dB
dB
pS
V
2.5
14.3
Min.
Typ.
-7.8
-7.4
15.9
15.2
12.3
56.3
40.6
30.8
1.8:1
1.3:1
1.8:1
1.9:1
2.6
2.8
2.7
2.9
82
2.8
3.1
Max.
Symbol
P
1dB
S
21
Small Signal Gain
S
12
Reverse Isolation
S
11
S
22
IP
3
NF
T
D
V
D
Input VSWR
Output VSWR
Third Order Intercept Point
Power out per Tone = -20 dBm
Noise Figure
Group Delay
Device Voltage
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
EDS-100935 Rev A
STANFORD [ STANFORD MICRODEVICES ]
