ETC SNA-486

SNA-486
Product Description
Sirenza Microdevices’ SNA-486 is a GaAs HBT MMIC Amplifier
housed in a low-cost, surface-mountable plastic package.
The heterojunction increases breakdown voltage and
minimizes leakage current between junctions. Cancellation
of emitter junction non-linearities results in higher suppression
of intermodulation products.
DC-6.5 GHz, Cascadable
GaAs MMIC Amplifier
Not Recommended for New Designs
See Application Note AN-017 for Alternates
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 (0.38mm
x 0.38mm) and gold metallization make it an ideal choice for
use in hybrid circuits.
Gain & Return Loss vs. Frequency
(ID=65mA, TLEAD=+25°C)
0
12
-5
8
-10
4
-15
Gain
Input Return Loss
Output Return Loss
0
Return Loss (dB)
Gain (dB)
16
Applications
• Cellular, PCS, CDPD, Wireless Data, SONET
-20
0
1
2
3
4
Frequency (GHz)
Sy mbol
5
6
Parameter
Product Features
• Patented GaAs HBT Technology
• Cascadable 50 Ohm Gain Block
• +32dBm Ouput IP3 at 850MHz
• Operates From Single Supply
• Low Cost Surface Mount Plastic Package
7
Frequency
Units
Min.
Ty p.
dBm
dBm
dBm
15.5
17.1
17.5
17.5
27.9
32.3
30.9
30.6
P1dB
Output Pow er at 1dB Compression
850 M Hz
1950 M Hz
2400 M Hz
OIP3
Output Third Order Intercept Point
850 M Hz
1950 M Hz
2400 M Hz
dBm
dBm
dBm
Small Signal Gain
850 M Hz
1950 M Hz
2400 M Hz
dB
dB
dB
S21
Bandw idth
VSWRIN
VSWROUT
S12
(Determined by S11, S22 Values)
M Hz
13.9
13.6
13.5
DC-6500 M Hz
-
1.7:1
Output VSWR
DC-6500 M Hz
-
1.6:1
Reverse Isolation
850 M Hz
1950 M Hz
2400 M Hz
dB
dB
dB
18.3
18.2
18.2
1950 M Hz
dB
NF
Noise Figure
Device Operating Voltage
ID
Device Operating Current
Thermal Resistance (junction - lead)
Test Conditions:
VS = 8 V
RBIAS = 47 Ohms
o
ID = 65 mA Typ.
TL = 25ºC
V
4.5
mA
58
C/W
15.3
15.0
6500
Input VSWR
VD
RTH, j-l
12.5
12.2
Max.
5.0
6.5
5.0
5.5
65
72
254
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 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. Sirenza Microdevices does not authorize or warrant any Sirenza Microdevices product for use in life-support devices and/or systems. Copyright
2003 Sirenza Microdevices, Inc.. All worldwide rights reserved.
522 Almanor Ave., Sunnyvale, CA 94085
Phone: (800) SMI-MMIC
1
http://www.sirenza.com
EDS-101396 Rev C
Preliminary
SNA-486 DC-6.5 GHz Cascadable MMIC Amplifier
Typical RF Performance at Key Operating Frequencies
Frequency (MHz)
Sy mbol
G
Parameter
Small Si gnal Gai n
U nit
100
500
dB
13.9
850
1950
2400
3500
13.1
13.9
13.9
13.6
13.5
OIP3
Output Thi rd Order Intercept Poi nt
dB m
32.0
32.3
30.9
30.6
P 1dB
Output Power at 1dB C ompressi on
dB m
17.0
17.1
17.5
17.5
IRL
Input Return Loss
dB
11.0
11.6
12.2
11.7
11.5
11.9
ORL
Output Return Loss
dB
15.4
15.6
16.2
14.7
14.1
12.0
S 12
Reverse Isolati on
dB
18.3
18.3
18.3
18.2
18.2
18.2
NF
Noi se Fi gure
5.0
5.0
5.0
dB
V = 8v
Test Conditions: S
RBIAS = 47 Ohms
ID = 65mA Typ.
TL = 25ºC
OIP3 Tone Spacing = 1 MHz, Pout per tone = 0 dBm
ZS = ZL = 50 Ohms
Absolute Maximum R atings
Operati on of thi s devi ce beyond any one of these li mi ts may
cause permanent damage. For reli able conti nous operati on,
the devi ce voltage and current must not exceed the maxi mum
operati ng values speci fi ed i n the table on page one.
Bi as C ondi ti ons should also sati sfy the followi ng expressi on:
Parameter
Absolute Limit
Max. D evi ce C urrent (ID)
110 mA
Max. D evi ce Voltage (VD)
7V
Max. RF Input Power
+16 dBm
Max. Juncti on Temp. (TJ)
+175°C
Operati ng Temp. Range (TL)
-40°C to +85°C
Max. Storage Temp.
+150°C
IDVD < (TJ - TL) / RTH, j-l
NOTE: While the SNA-486 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.
Junction Temperature vs. Dissipated Power
MTTF vs. Dissipated Power
1.E+08
190
TJmax
180
1.E+07
MTTF (hrs)
Junction Temperature (°C)
200
170
160
85°C lead temp
85°C lead temp
1.E+06
1.E+05
150
140
0.25
1.E+04
0.3
0.35
0.4
0.45
0.25
Dissipated Power (W)
522 Almanor Ave., Sunnyvale, CA 94085
0.3
0.35
0.4
0.45
Dissipated Power (W)
Phone: (800) SMI-MMIC
2
http://www.sirenza.com
EDS-101396 Rev C
Preliminary
SNA-486 DC-6.5 GHz Cascadable MMIC Amplifier
Typical RF Performance (VDS = 5.0V, IDS = 65mA, TLEAD=25° C)
Gain & Isolation vs. Frequency
Return Loss vs. Frequency
20
0
0
Gain
Input Return Loss
12
-10
8
-15
GHz
4
Return Loss (dB)
-5
Isolation
Isolation (dB)
Gain (dB)
16
-25
0
1
2
3
4
Frequency (GHz)
5
6
Output Return Loss
-10
-15
-20
0
-5
-20
7
0
1
2
3
4
5
6
7
Frequency (GHz)
P1dB vs. Frequency
Output IP3 vs. Frequency
21
39
18
36
P1dB (dBm)
OIP3 (dBm)
15
33
30
27
12
9
6
24
3
0
21
0.5
1.0
1.5
2.0
2.5
3.0
0.5
3.5
1.0
1.5
2.0
2.5
3.0
3.5
Frequency (GHz)
Frequency (GHz)
Noise Figure vs. Frequency
6.0
5.5
NF (dB)
5.0
4.5
4.0
3.5
3.0
0.5
0.7
0.9
1.1
1.3
1.5
1.7
1.9
2.1
Frequency (GHz)
522 Almanor Ave., Sunnyvale, CA 94085
Phone: (800) SMI-MMIC
3
http://www.sirenza.com
EDS-101396 Rev C
Preliminary
SNA-486 DC-6.5 GHz Cascadable MMIC Amplifier
Application Circuit Element Values
Typical Application Circuit
R BIAS
1 uF
LC
1
RF in
500
850
1950
2400
3500
CB
220 pF
100 pF
68 pF
56 pF
39 pF
CD
100 pF
68 pF
22 pF
22 pF
15 pF
LC
68 nH
33 nH
22 nH
18 nH
15 nH
CD
1000
pF
4
SNA-486
R ecommended B ias R esistor Values for ID=65mA
R BIAS=( VS-VD ) / ID
3
RF out
CB
2
CB
Frequency (Mhz)
Reference
Designator
Supply Voltage(VS)
8V
RBIAS
47
9V
62
12 V
110
15 V
150
Note: RBIAS provi des D C bi as stabi li ty over temperature.
VS
1 uF
RBIAS
1000 pF
LC
Mounting Instructions
CD
S4
1. Use a large ground pad area under device pins 2
and 4 with many plated through-holes as shown.
CB
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.
Part Identification Marking
The part will be marked with an “S4” designator on
the top surface of the package.
3
4
S4
2
Pin #
Function
1
RF IN
RF input pin. This pin requires the use
of an external DC blocking capacitor
chosen for the frequency of operation.
2, 4
GND
Connection to ground. For optimum RF
performance, use via holes as close to
ground leads as possible to reduce lead
inductance.
3
1
Description
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.
Part Number Ordering Information
Caution: ESD sensitive
Appropriate precautions in handling, packaging
and testing devices must be observed.
522 Almanor Ave., Sunnyvale, CA 94085
Part Number
Reel Size
Devices/Reel
SNA-486-TR1
7"
1000
Phone: (800) SMI-MMIC
4
http://www.sirenza.com
EDS-101396 Rev C
Preliminary
SNA-486 DC-6.5 GHz Cascadable MMIC Amplifier
PCB Pad Layout
Dimensions in inches [millimeters]
Nominal Package Dimensions
Dimensions in inches [millimeters]
Refer to drawing posted at www.sirenza.com for tolerances.
522 Almanor Ave., Sunnyvale, CA 94085
Phone: (800) SMI-MMIC
5
http://www.sirenza.com
EDS-101396 Rev C