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DA2709 Wideband Amplifier
A d v a n c e I n f o r m a t i o n
HiMARK Technology, Inc. reserves the right to change the product described in this datasheet. All information contained
in this datasheet is subject to change without prior notice. HiMARK Technology, Inc. assumes no responsibility for the
use of any circuits shown in this datasheet.
Description
The DA2709 is a general purpose, low-cost RF wideband amplifier IC. The input and out-
put of the IC are internally matched to 50
for convenient cascading. Applications include
IF and RF amplification in wireless voice and data communication products from DC to
3GHz. The DA2709 requires minimal external components for DC bias.
Features
u
DC to 3GHz Operation
u
Internally Matched Input and Output
u
22dB Small Signal Gain @2GHz
u
P1dB = 8dBm @2GHz
u
Single Positive Power Supply
u
SOT363 surface-mount package
Pin Out Diagram
IN
V
CC
OUT
GND
3
1
4
6
5
GND
GND
2
6
0
H
Pin Descriptions
Number
Name
Description
1
V
CC
Power supply pin. An external bypass capacitor is required.
2
GND
Ground connection. Keep PCB traces as short as possible and connect
immediately to ground plane for best performance.
3
OUT
Signal output and bias pin. An external choke inductor L to V
CC
is required
for biasing. An external series DC blocking capacitor is also required.
4
GND
Same as pin 2.
5
GND
Same as pin 2.
6
IN
Signal input pin. An external series DC blocking capacitor is required. No
DC coupling allowed.
A d v a n c e I n f o r m a t i o n
DA2709
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Package and Pin Assignment: 6L, SOT363
Symbols
Dimensions in mm
MIN.
NOM.
MAX.
A
--
--
1.00
A1
0.05
0.075
0.10
A2
0.850
0.88
0.90
A3
0.50 BSC
b
0.15
--
0.30
b1
0.15
0.20
0.25
C
0.10
--
0.20
C1
0.10
0.127
0.15
D
1.90
2.00
2.10
E
2.10 BSC
E1
1.25
1.30
1.35
L
0.26
0.36
0.46
e1
1.30 BSC
e
0.65 BSC
0.10
A d v a n c e I n f o r m a t i o n
DA2709
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Absolute Maximum Ratings
Electrical Characteristics
(
V
CC
= 5V, I
CC
= 25mA, and T
A
= 25C unless otherwise noted)
Parameter
Symbol
Rating
Unit
Supply Current
I
CC
50
mA
Input RF Power
P
IN
5
dBm
Operating Temperature Range
T
A
40 to 85
C
Storage Temperature Range
60 to 150
C
Parameter
Symbol
Condition
Value
Unit
Min.
Typ.
Max.
Power Supply
Supply Voltage
V
CC
Applied to pins 4 & 6
5
V
Supply Current
I
CC
25
mA
AC Characteristics
Frequency Range
DC
3
GHz
Gain
Frequency = 1GHz
22
dB
(output connected through bias tee)
Frequency = 2GHz
22
dB
Frequency = 3GHz
21
dB
Gain Flatness
100MHz to 1.8GHz
+ 1
dB
Noise Figure
NF
Frequency = 1GHz
4
dB
Input Return Loss
In a 50
system
10
dB
Output Return Loss
In a 50
system
10
dB
Output P
1dB
P
1dB
Frequency = 1GHz
8
dBm
Frequency = 2GHz
8
dBm
Reverse Isolation
Frequency = 1GHz
31
dB
A d v a n c e I n f o r m a t i o n
DA2709
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Evaluation Board Schematic
Inductor L Selection Guide
Value
Operating Frequency
300nH
10MHz or higher
100nH
100MHz or higher
10nH
1GHz or higher
4
6
3
1
2
50
microstrip
1000pF
RF IN
L
1000pF
V
CC
50
microstrip
1000pF
RF OUT
5
A d v a n c e I n f o r m a t i o n
DA2709
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Typical Characteristics
(T
A
= 25C )
S U P P L Y C U R R E N T v s . A M B I E N T T E M P E R A T U R E
Ambient Temperature T
A
(
o
C)
-60
-40
-20
0
2 0
4 0
6 0
8 0
1 0 0
Supply Current Icc (mA)
0
1 0
2 0
3 0
4 0
5 0
Vcc=5V
Supply Current vs. Voltage
Supply Voltage Vcc (V)
0
1
2
3
4
5
6
Supply Current Icc (mA)
0
1 0
2 0
3 0
4 0
5 0
T
A
=25
o
C
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