ALM-31122
700MHz - 1GHz
1-Watt High Linearity Amplifier
Data Sheet
Description
Features
Avago Technologies’ ALM-31122 is a high linearity 1 Watt
PA with good OIP3 performance and exceptionally good
PAE at 1dB gain compression point, achieved through the
use of Avago Technologies’ proprietary 0.25um GaAs En-
hancement-mode pHEMT process.
• Fully matched, input and output
• High linearity and P1dB
• Unconditionally stable across load condition
• Built-in adjustable temperature-compensated internal
bias circuitry
All matching components are fully integrated within the
module and the 50Ω RF input and output pins are already
internally AC-coupled. This makes the ALM-31122 ex-
tremely easy to use as the only external parts are DC sup-
ply bypass capacitors.
[1]
• GaAs E-pHEMT Technology
• 5V supply
• Excellent uniformity in product specifications
• Tape-and-Reel packaging option available
• MSL-3 and Lead-free
The adjustable temperature-compensated internal bias
circuit allows the device to be operated at either class A or
class AB operation.
• High MTTF for base station application
The ALM-31122 is housed inside a miniature 5.0 x 6.0 x 1.1
mm 22-lead multiple-chips-on-board (MCOB) module
package.
Specifications
3
900 MHz; 5V, 394mA (typical)
• 15.6 dB Gain
Component Image
• 47.6 dBm Output IP3
3
5.0 x 6.0 x 1.1 mm 22-lead MCOB
• 31.6 dBm Output Power at 1dB gain compression
• 52.5% PAE at P1dB
22
19
21
20
18
17
16
GND
GND
1
• 2 dB Noise Figure
2
NC
RF_OUT
31122
WWYY
XXXX
Applications
3
4
GND
GND
RF_IN
GND 15
14
GND
• Class A driver amplifier for GSM/CDMA Base Stations.
13
12
GND
GND
5
• General purpose gain block.
Note:
6
7
9
8
10
11
GND
1. Enhancement mode technology employs positive gate voltage,
thereby eliminating the need of negative gate voltage associated
with conventional depletion mode devices.
Top View
Bottom View
Notes:
Attention: Observe precautions for
handling electrostatic sensitive devices.
ESD Machine Model = 120 V
Package marking provides orientation and identification
“31122” = Device Part Number
“WWYY”= Work week and Year of manufacture
“XXXX”= Last 4 digit of Lot number
ESD Human Body Model = 500 V
Refer to Avago Application Note A004R:
Electrostatic Discharge, Damage and Control.