WJ Company AH22DUAL-PCB, AH22-PCB, AH22 Datasheet
WJ Communications, Inc. • Phone: 1-800-WJ1-4401 • FAX: 408-577-6620 • e-mail: sales@wj.com • Web site: www.wj.com
April 2002
AH22
Product Description
The AH22 is a high dynamic range amplifier targeting cable TV markets. A combination of gain
flatness, high linearity and bandwidth make it
ideal for CATV distribution, cable modem and
laser diode driver applications. The device is
designed for 75 Ω systems and packaged for
push-pull operation. A mature and reliable GaAs
MESFET technology is employed to maximize
linearity at low power dissipation. The package is
a thermally enhanced SOIC-8 and all devices are
100% RF tested.
Product Features
•
50-860 MHz Bandwidth
•
-61 dBc CTB, 110 Channels,
40 dBmV
•
-63 dBc CSO, 110 Channels,
40 dBmV
•
4.5 dB Noise Figure
•
11.3 dB Gain
•
23 dBm P1dB
•
Surface Mount
•
Thermally enhanced SOIC-8 pkg
•
Single +5 Volt Supply
Functional Diagram
Absolute Maximum Ratings
Parameter Rating
Operating Case -40 to +85°C
Storage Temperature -40 to +125°C
Junction Temperature +155°C
Thermal Resistance (θ
JC
) 28°C/W
Supply Voltage +6.0 V
Input RF Power (continuous) +13 dBm
Operation of this device above any of these parameters may cause permanent damage.
Ordering Information
Part No. Description
AH22 High Dynamic CATV Range Amplifier
(Available in tape and reel)
AH22-PCB Fully Assembled Application Circuit
50-860 MHZ
AH22DUAL-PCB Fully Assembled Application Circuit,
Dual AH22
High Dynamic Range CATV Amplifier
Specifications
Parameter Units Minimum Typical Maximum Condition
Frequency Range MHz 50-860
S21-Gain dB 11.3
50 MHz
S21-Gain dB 11.0
860 MHz
S11-Input Return Loss dB -12
S22-Output Return Loss dB -12
Output IP3 dBm 41
Output IP2 dBm 65
Noise Figure dB 4.5
Output P1dB dBm 23 71.7 dBmV
CSO dBc -63 110 channels, 50-750 MHz, 40 dBmV
output/channel
CSO dBc -58 135 channels, 50-860 MHz, 39 dBmV
output/channel
CTB dBc -61 110 channels, 50-750 MHz, 40 dBmV
output/channel
CTB dBc -59 135 channels, 50-860 MHz, 39 dBmV
output/channel
Operating Current Range mA 240 300 360 Vdd = 5.0 V
Supply Voltage V 5
Test conditions unless otherwise noted.T = 25˚C, Vdd = 5.0 V, 75 Ω system.
1.Typical specifications reflect AH22 measured with external matching circuits.
2. OIP3 measured with 2 tones at an output power of 8 dBm/tone separated by 10 MHz. The suppression on the largest IM3 product is used to calculate OIP3 using a 2:1 slope r ule.
The Communications Edge
™
8765
1234
Function Pin No.
Input 1 1
Ground 2,3,6,7
Input 2 4
Output/Bias2 5
Output/Bias1 8
WJ Communications, Inc. • Phone: 1-800-WJ1-4401 • FAX: 408-577-6620 • e-mail: sales@wj.com • Web site: www.wj.com
April 2002
AH22
Push-Pull Circuit: 50-860 MHz Performance Charts
Typical Performance (75 Ohm System)
Frequency 50 MHz 450 MHz 750 MHz 860 MHz
Magnitude S21 11.7 dB 11.7 dB 11.4 dB 11.3 dB
Magnitude S11 -11.0 dB -12.3 dB -11.7 dB -15.6 dB
Magnitude S22 -13.2 dB -11.9 dB -11.4 dB -12.3 dB
OIP2 72.0 dBm 70 dBm 72 dBm 70 dBm
OIP3 42.0 dBm 43 dBm 41 dBm 40 dBm
Bias Vds = 5 V, Id = 300 mA
Multi-channel Measurements
CSO -63 dBc 750 MHz 110 channels +40 dBmV/ch, Flat
CTB -61 dBc 750 MHz 110 channels +40 dBmV/ch, Flat
XMOD -61 dBc 750 MHz 110 channels +40 dBmV/ch, Flat
Schematic
DC +5 V
C = 1000 pF
R = 560
RF IN
6 turns bifilar
wire around
ferrite core
L = 5.6 nH
C = 1.5 pF
C = 1.5 pF
L = 5.6 nH
4 or more Via
Grounds req.
R = 560
C = 100 pF
AH22
C = 100 pF
DC +5 V
L = 470 nH
L = 470 nH
C = 1000 pF
Or
MaCOM
ETCI-1-13
SMT balun
6 turns bifilar
wire around
ferrite core
Core: TDK H5C2-T3.1-1.3-1.3
Wire: MWS B2383211
RF OUT
S-Parameters
15
10
5
0
-5
S11
Magnitude (dB)
-10
-15
S22
-20
0 100 200 300 400 500 600 700 800 900 1000
Frequency (MHz)
S21
Linearity vs. Frequency
80
70
60
50
40
30
20
Intercept Point (dBm)
V = 5 V
10
I = 290 mA
0
0 100 200 300 400 500 600 700 800 900 1000
OIP2
OIP3
Frequency (MHz)
FR4 Board Layout (T = 28 Mils to ground plane)
Interior Trans. Lines Z = 37.5 Ohm
1008 Package
L = 5.6 nH
0603 Package
R = 560 ohm
AH22
0402 Package
C = 1.5 pF
1008 Package
L = 5.6 nH
Note: Balun and board losses have not been extracted but typically account for 0.4 dB loss midband and 1.1 dB loss at 860 MHz.
0603 Package
R = 560 ohm
0603 Package
C = 1000 pF
0603 Package
C = 100 pF
0603 Package
C = 100 pF
0603 Package
C = 1000 pF
+5 V
L = 470 nH
Coilcraft
1008 Package
0603 Package
C = 1000 pF
0603 Package
C = 1000 pF
L = 470 nH
Coilcraft
1008 Package
+5 V
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