MAX2644EXT-T Maxim Integrated Products, MAX2644EXT-T Datasheet - Page 5

• Manufacturer Part Number: MAX2644EXT-T
• Description: RF Amplifier 2.4GHz SiGe, High IP 3 Low-Noise Amplifie
• Manufacturer: Maxim Integrated Products
• Type: General Purpose Amplifierr

Specifications of MAX2644EXT-T

• Operating Frequency: 2500 MHz
• Noise Figure: 2 dB at 2450 MHz
• Operating Supply Voltage: 3 V, 5 V
• Supply Current: 9.7 mA
• Maximum Power Dissipation: 245 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SC-70
• Minimum Operating Temperature: - 40 C
• Number Of Channels: 1 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 2. High Linearity Design
Input matching is required for optimum performance.
The MAX2644 requires a simple LC matching network,
as shown in the Typical Operating Circuit. To further
reduce cost and external component count, replace the
external inductor with a microstrip transmission line.
The Typical Operating Circuit shows the recommended
input matching network for the MAX2644 at 2450MHz.
These values are optimized for best simultaneous gain,
noise figure, and return loss performance.
Figure 3. Recommended MAX2644 Standby Configurations
Applications Information
SMA
GAIN: 16dB
IIP3: +1dBm
_______________________________________________________________________________________
RFIN
BIAS
3.3nH
MAX2644
L1
(a)
Input Matching
1.2kΩ
R1
33pF
C1
High IP3 Low-Noise Amplifier
2
3
1
BIAS
GND
RFIN
MAX2644
U1
Bypassing the V
gain/linearity performance. A transmission line and two
capacitors are required, as shown in the schematics in
Figures 1 and 2. The optimum dimensions and posi-
tions of the components are as follows: the output
transmission line dimension is 0.532in (length)
(width); the distance from C2 to the IC is 0.352in; and
the distance from C3 to the IC is 0.041in. Please refer
to Figures 1 and 2 for component values.
RFOUT
GND
V
CC
5
4
6
Length = 400mils
C3
15pF
BIAS
3.9nH
MAX2644
CC
L2
(b)
line is necessary for optimum
2.4GHz SiGe,
C2
33pF
V
RFOUT
CC
V
GND
CC
SMA
Line Bypassing
✕
0.012in
5