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Product Description
Sirenza Microdevices SGA-6486 is a high performance SiGe HBT MMIC Amplifier. A Darlington configuration featuring 1 micron emitters provides high F T and excellent thermal perfomance. The heterojunction increases breakdown voltage and minimizes leakage current between junctions. Cancellation of emitter junction non-linearities results in higher suppression of intermodulation products. At 850 Mhz and 80mA , the SGA6486 typically provides +35 dBm output IP3, 19.7 dB of gain, and +20.2 dBm of 1dB compressed power using a single positive voltage supply. Only 2 DC-blocking capacitors, a bias resistor and an optional RF choke are required for operation.
Gain & Return Loss vs. Frequency
VD= 5.1 V, ID= 75 mA (Typ.)
SGA-6486
DC-4500 MHz, Cascadable SiGe HBT MMIC Amplifier
Product Features
High Gain : 16.4 dB at 1950 MHz Cascadable 50 Ohm Patented SiGe Technology
24 18
Gain (dB)
GAIN
0 -10 -20 -30
Return Loss (dB)
Operates From Single Supply Low Thermal Resistance Package
12 6 0 0 1
ORL IRL
Applications
PA Driver Amplifier Cellular, PCS, GSM, UMTS IF Amplifier Wireless Data, Satellite
Units dB dBm dBm M Hz dB dB dB V mA C/W 1950 M Hz 1950 M Hz 1950 M Hz 4.7 67 Frequency 850 M Hz 1950 M Hz 2400 M Hz 850 M Hz 1950 M Hz 850 M Hz 1950 M Hz Min. 18.0 Ty p. 19.7 16.4 14.8 20.2 18.5 35.0 32.0 4500 21.4 18.0 3.3 5.1 75 97 5.5 83 Max. 22.0
TL=+25C
-40 2 3 Frequency (GHz) 4 5
Sy mbol G P1dB OIP3
Parameter Small Signal Gain Output Pow er at 1dB Compression Output Third Order Intercept Point
Bandw idth Determined by Return Loss (>10dB)
IRL ORL NF VD ID RTH, j-l
Input Return Loss Output Return Loss Noise Figure Device Operating Voltage Device Operating Current Thermal Resistance (junction to lead)
VS = 8 V RBIAS = 39 Ohms ID = 75 mA Typ. TL = 25C
Test Conditions:
OIP3 Tone Spacing = 1 MHz, Pout per tone = 0 dBm ZS = ZL = 50 Ohms
The information provided herein is believed to be reliable at press time. Sirenza Microdevices assumes no responsibility for inaccuracies or omissions. Sirenza Microdevices assumes no responsibility for the use of this information, and all such information shall be entirely at the users 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. Sirenza Microdevices does not authorize or warrant any Sirenza Microdevices product for use in life-support devices and/or systems. Copyright 2001 Sirenza Microdevices, Inc.. All worldwide rights reserved.
522 Almanor Ave., Sunnyvale, CA 94085
Phone: (800) SMI-MMIC
1
http://www.sirenza.com
EDS-100615 Rev D
Preliminary SGA-6486 DC-4500 MHz Cascadable MMIC Amplifier Typical RF Performance at Key Operating Frequencies
Sy mbol Parameter Unit 100
Frequency Frequency (MHz) Frequency (MHz)(MHz) 500 850 1950
2400
3500
G OIP3 P1dB IRL ORL S12 NF
Small Signal Gain Output Third Order Intercept Point Output Pow er at 1dB Compression Input Return Loss Output Return Loss Reverse Isolation Noise Figure
VS = 8 V VS = 8 V RBIAS = 39 Ohms RBIAS = 39 Ohms
dB dBm dBm dB dB dB dB
21.0 35.0 20.2 32.2 16.8 24.0 3.2
20.3 35.3 20.3 23.3 18.2 23.9 2.9
19.7 35.0 20.2 22.8 23.0 23.6 3.0
16.4 32.0 18.5 21.4 18.0 21.2 3.3
14.8 31.0 17.5 17.4 17.4 19.7 3.7
12.3 26.5 14.7 14.4 14.2 16.6 4.4
Test Conditions:
= 75 mA Typ. IID = 80 mA Typ. D T = 25C TLL = 25C
OIP Tone Spacing = 1 MHz, Pout per tone = 0 dBm OIP33 Tone Spacing = 1 MHz, Pout per tone = 0 dBm ZS = Z = 50 Ohms ZS = ZLL= 50 Ohms
Noise Figure vs. Frequency
VD= 5.1 V, ID= 75 mA
5 Noise Figure (dB) 4 3 2 1 0 0 1 2 Frequency (GHz) 3 4
Absolute Maximum Ratings
Parameter Max. Device Current (ID) Max. Device Voltage (VD) Max. RF Input Pow er Max. Junction Temp. (TJ)
Operating Temp. Range (TL)
Absolute Limit
150 mA
7V +18 dBm
+150C -40C to +85C +150C
TL=+25C
Max. Storage Temp.
Operation of this device beyond any one of these limits may cause permanent damage. For reliable continous operation, the device voltage and current must not exceed the maximum operating values specified in the table on page one. Bias Conditions should also satisfy the follow ing expression: IDVD < (TJ - TL) / RTH, j-l
OIP3 vs. Frequency
VD= 5.1 V, ID= 75 mA
40 36 OIP3(dBm) 32 28
+25C
P1dB vs. Frequency
VD= 5.1 V, ID= 75 mA
22 20 P1dB(dBm) 18 16
+25C
24 20 0.0 0.5
TL
1.0
-40C +85C
14 12
TL
0.0 0.5 1.0
-40C +85C
1.5
2.0
2.5
3.0
3.5
1.5
2.0
2.5
3.0
3.5
Frequency (GHz)
Frequency (GHz)
522 Almanor Ave., Sunnyvale, CA 94085
Phone: (800) SMI-MMIC
2
http://www.sirenza.com
EDS-100615 Rev D
Preliminary SGA-6486 DC-4500 MHz Cascadable MMIC Amplifier
|S | vs. Frequency
24 18 |S21| (dB)
VD= 5.1 V, ID= 75 mA
21
|S | vs. Frequency
0 -10 |S11| (dB) -20 -30
VD= 5.1 V, ID= 75 mA
11
12 6
TL
0 0 1 2 3 Frequency (GHz) 4
+25C -40C +85C
TL
-40
5
+25C -40C +85C
0
1
2 3 Frequency (GHz)
4
5
|S | vs. Frequency
-10
VD= 5.1 V, ID= 75 mA
12
|S | vs. Frequency
0 -10 |S22| (dB) -20 -30
VD= 5.1 V, ID= 75 mA
22
-15 |S12| (dB)
-20
-25
TL
-30
0 1 2 3 4
+25C -40C +85C
TL
-40
5
+25C -40C +85C
0
1
Frequency (GHz)
2 3 Frequency (GHz)
4
5
90 85 80 ID(mA) 75 70 65 60 4.7
VD vs. ID over Temperature for fixed VS= 8 V, RBIAS= 39 ohms *
VD vs. Temperature for Constant ID = 75 mA
5.7 5.5 VD(Volts) 5.3 5.1 4.9 4.7
+85C
+25C
-40C
4.9
5.1 VD(Volts)
5.3
5.5
-40
-15
10 35 Temperature(C)
60
85
* Note: In the applications circuit on page 4, RBIAS compensates for voltage and current variation over temperature.
522 Almanor Ave., Sunnyvale, CA 94085
Phone: (800) SMI-MMIC
3
http://www.sirenza.com
EDS-100615 Rev D
Preliminary SGA-6486 DC-4500 MHz Cascadable MMIC Amplifier Basic Application Circuit
R BIAS
1 uF 1000 pF
Application Circuit Element Values
Reference Designator Frequency (Mhz) 500 850 1950 2400 3500
VS
CD LC
CB CD LC
220 pF 100 pF 68 nH
100 pF 68 pF 33 nH
68 pF 22 pF 22 nH
56 pF 22 pF 18 nH
39 pF 15 pF 15 nH
RF in CB
4 1 SGA-6486 3 2 CB
RF out
R ecommended B ias R esistor Values for ID=75mA R BIAS=( VS-VD ) / ID Supply Voltage(VS) RBIAS 6V 13 8V 39 10 V 62 12 V 91
VS
RBIAS
1 uF 1000 pF
Note: RBIAS provi des D C bi as stabi li ty over temperature.
Mounting Instructions
1. Use a large ground pad area under device pins 2 and 4 with many plated through-holes as shown.
LC
CD CB
A64
CB
2. We recommend 1 or 2 ounce copper. Measurements for this data sheet were made on a 31 mil thick FR-4 board with 1 ounce copper on both sides.
Pin #
Function RF IN
Description RF input pin. This pin requires the use of an external DC blocking capacitor chosen for the frequency of operation. Connection to ground. For optimum RF performance, use via holes as close to ground leads as possible to reduce lead inductance.
Part Identification Marking The part will be marked with an A64 designator on the top surface of the package. 3
1
2, 4
GND
4
A64
1
2
3
RF OUT/ RF output and bias pin. DC voltage is BIAS present on this pin, therefore a DC blocking capacitor is necessary for proper operation.
Caution: ESD sensitive
Part Number Ordering Information
Part Number SGA-6486 Reel Size 13" Devices/Reel 3000
Appropriate precautions in handling, packaging and testing devices must be observed.
522 Almanor Ave., Sunnyvale, CA 94085
Phone: (800) SMI-MMIC
4
http://www.sirenza.com
EDS-100615 Rev D
Preliminary SGA-6486 DC-4500 MHz Cascadable MMIC Amplifier
Dimensions in inches [millimeters]
PCB Pad Layout
Dimensions in inches [millimeters] Refer to drawing posted at www.sirenza.com for tolerances.
Nominal Package Dimensions
522 Almanor Ave., Sunnyvale, CA 94085
Phone: (800) SMI-MMIC
5
http://www.sirenza.com
EDS-100615 Rev D

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