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ALM-81224 Schematic ( PDF Datasheet ) - AVAGO

Teilenummer ALM-81224
Beschreibung High Linearity 1450 - 2750 MHz Variable Gain Amplifier
Hersteller AVAGO
Logo AVAGO Logo 




Gesamt 23 Seiten
ALM-81224 Datasheet, Funktion
ALM-81224
High Linearity 1450 – 2750 MHz Variable Gain Amplifier
Data Sheet
Description
Avago Technologies’ ALM-81224 is a high linearity vari-
able-gain amplifier module for use in the 1450-2750MHz
band. Gain control is achieved using a single DC voltage
input pin. High linearity is achieved through the use of
Avago Technologies’ proprietary GaAs Enhancement-
mode pHEMT process1. It is housed in a miniature 6.0
x 6.0 x 1.0 mm 24-pin Molded Chip On Board (MCOB)
package. Gain changes monotonically with gain control
pin voltage. Input is fully matched. Output match can be
tuned for optimal performance at a particular frequency
band within the VGA operation frequency range using
common RF board layout. The compact footprint coupled
with high linearity and efficiency makes ALM-81224 an
ideal choice for Basestation transmitters and receivers and
Temperature Compensation Circuitry applications.
Component Image
(6.0 x 6.0 x 1.0) mm 24-lead MCOB
AVAGO
81224
WWYY
XXXX
Note:
Package marking provides
orientation and identification
“81224 “ = Device Code
“WWYY” = Date Code identifies
month and year of
manufacturing
“XXXX” = Last 4 digit of assembly
lot number
Pin Configuration
Vdd1 GND GND GND GND Vdd2
24 23 22 21 20 19
GND 1
18 GND
RFIN 2
Q1/Q2 3
Interstage
4
GROUND
17 ½
¾ RFOUT
16 ¿
15 GND
GND 5
14 GND
GND 6
13 GND
7 8 9 10 11 12
Vc_att GND Vc1 Vc2 GND Vddbias
Features
x High Linearity at low bias current
x High max gain: 23.8 dB typ
x High linearity performance: +16.5 dBm at -65 dBc ACLR
using dual-carrier W-CDMA input signal
x Fully-matched 50 Ohm input and simple output match
x Low Noise Figure
x Built-in attenuator with monotonic response
x Variable Gain range: 38 dB typ
x GaAs E-pHEMT Technology [1]
x Small package size: 6.0 x 6.0 x 1.0 mm
Typical Performances
2140 MHz @ 5 V, 383 mA (typ)
x 23.8 dB Gain at minimum attenuation
x +16.5 dBm output power (-65 dBc ACLR) using dual-
carrier W-CDMA input signal with PAPR = 7.5 dB.
x NF: 2dB @ max gain and 16 dB @ min gain
x P1dB: 27.4 dBm
x Attenuator range: 38 dB with Vc_att: (0 V – 3.3 V)
x Shutdown current (Vc1, Vc2 = 0 V): < 30 PA
Applications
x Basestation Transmitter, Receiver and Temperature
Compensation Circuits requiring continuously variable
gain functionality
Note:
1. Enhancement mode technology employs positive Vgs, thereby
eliminating the need of negative gate voltage associated with
conventional depletion mode devices.
Attention: Observe precautions for
handling electrostatic sensitive devices.
ESD Machine Model = 50 V
ESD Human Body Model = 500 V
Refer to Avago Application Note A004R:
Electrostatic Discharge, Damage and Control.






ALM-81224 Datasheet, Funktion
28.5
28.0
27.5
27.0
26.5
26.0
25.5
25.0
24.5
6
25° C
-40° C
85° C
8 10 12 14 16 18 20 22 24 26 28 30
Pout (dBm)
Figure 14. Gain vs Pout at 1485 MHz
48
46
44
42
40
38
25° C
36 -40° C
85° C
34
-20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0
Pin (dBm)
Figure 15. OIP3 vs Pin at 1485 MHz
-35
-40
-45
-50
-55
-60
-65 25° C
-70
-40° C
85° C
-75
10 11 12 13 14 15 16 17 18 19 20 21 22
Pout (dBm)
Figure 16. ACLR (Dual Carrier Signal) vs Pout at 1485 MHz
-30
-35
-40
-45
-50
-55
-60
-65 25° C
-40° C
-70 85° C
-75
10 11 12 13 14 15 16 17 18 19 20 21 22
Pout (dBm)
Figure 17. ACLR (Single Carrier Signal) vs Pout at 1485 MHz
-45
25° C
-50 -40° C
85° C
-55
-60
-65
-70
-75
-15 -10 -5 0 5 10 15 20 25 30
Gain (dB)
Figure 18. ACLR (Dual Carrier Signal) vs Gain at 1485 MHz
0.48
0.46
0.44
0.42 25° C
-40° C
0.40 85° C
0.38
0.36
0.34
0.32
10 11 12 13 14 15 16 17 18 19 20 21 22
Pout (dBm)
Figure 19. Idd_total vs Pout (Dual Carrier Signal) at 1485 MHz
6

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ALM-81224 pdf, datenblatt
25 36
20 32
15 28
10 24
5 Gain
0 Noise Figure
20
16
-5 12
-10 8
-15 4
-20 0
0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6
VcATT (V)
Figure 50. Gain & Noise Figure vs Vc_att at 2140 MHz at 25° C
25 36
20 32
15 28
10 24
5 Gain
0 Noise Figure
20
16
-5 12
-10 8
-15 4
-20 0
0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6
VcATT (V)
Figure 51. Gain & Noise Figure vs Vc_att at 2140 MHz at -40° C
25 36
20 32
15 28
10 24
5 Gain
0 Noise Figure
20
16
-5 12
-10 8
-15 4
-20 0
0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6
VcATT (V)
Figure 52. Gain & Noise Figure vs Vc_att at 2140 MHz at 85° C
24.0
23.5
23.0
22.5
22.0
21.5
21.0
20.5
20.0
8
25° C
-40° C
85° C
10 12 14 16 18 20 22 24 26 28 30
Pout (dBm)
Figure 53. Gain vs Pout at 2140 MHz
50
48
46
44
42
40
38
36 25° C
-40° C
34 85° C
32
-20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0
Pin (dBm)
Figure 54. OIP3 vs Pin at 2140 MHz
-40
25° C
-45 -40° C
85° C
-50
-55
-60
-65
-70
-75
10 11 12 13 14 15 16 17 18 19 20 21
Pout (dBm)
Figure 55. ACLR (Dual Carrier Signal) vs Pout at 2140 MHz
12

12 Page





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