ETC AH2

AH2
The Communications Edge ™
High Dynamic Range CATV Amplifier
Product Features
Product Description
• 50-1000 MHz
• -71 dBc CTB
• -48 dBc CSO
• +20 dBm P1dB
• +40 dBm Output IP3
• 14.5 dB Gain
• MTTF >100 Years
• +5 V Single Positive Supply
Functional Diagram
The AH2 is a general purpose, high dynamic range
amplifier targeting cable TV markets. The combination
of gain flatness, high linearity and bandwidth make it
ideal for CATV distribution, cable modem and laser
diode driver applications. The AH2 is designed for
75 ohm systems and can operate directly from
a +5 Volt DC regulator. The device is manufactured
using reliable GaAs MESFET technology and boasts
an MTTF of >100 years at a mounting temperature of
85°C. All devices are 100% RF and DC tested.
4
1
2
3
PIN No.
Function
1
Input
Ground
2
3
Output/Bias
Ground
4
Typical Parameters
Specifications
Parameter
Units
Frequency Range
S21
Output IP3
P1dB
Operating Current
Supply Voltage
Max. Junction Temp.
Thermal Resistance
MHz
dB
dBm
dBm
mA
V
°C
°C/W
Min.
Typ.
Max. Condition
50-1000
14.5
+40
+21
150
+5
13
+37
120
See Note 2
180
160
59
See Note 3
Test Conditions unless otherwise noted.
1.Parameters reflect performance of a packaged device in a 75 Ω system at 25°C, Vdd = 5.0V, and 800 MHz.
2. OIP3 measured with 2 tones at an output power of 5 dBm/tone separated by 10 MHz. The
suppression on the largest IM3 product is used to calculate the OIP3 using a 2:1 slope rule.
3. The maximum junction temperature ensures a minimum MTTF rating of 1 million hours of usage
at a tab temperature of +85°C. The MTTF plot and more information is located in the
WJ Application Note “AH2 Temperature Effects on Reliability” for more information.
Parameter
Frequency
S21 - Gain
S21 - Gain
S11 - Input Return Loss
S22 - Output Return Loss
Output IP3
Output IP2
P1dB
Noise Figure
CTB
CSO
Xmod
Units
Typical
MHz
dB
dB
dB
dB
dBm
dBm
dBm
dB
dBc
dBc
dBc
50-1000
14.5
13.2
-14
-17
+40
+47
+20
3.5
-71
-48
-65
Condition
50 MHz
860 MHz
See Note 2
See Note 5
See Note 5
See Note 5
Test Conditions unless otherwise noted:
4. T=25°C, Vdd = 5.0V in a 75 Ω application circuit (AH2-PCB).
5. 77 Channels 50-550 MHz, +34 dBmV/channel, flat-loading.
Absolute Maximum Ratings
Parameter
Operating Case Temperture
Storage Temperature
DC Voltage
RF Input Power (continuous)
Ordering Information
Rating
-40 to +85°C
-40 to +125°C
+6.0 V
+10 dBm
Part No.
Description
AH2
High Dynamic Range CATV Amplifier
(Available in tape and reel)
Fully Assembled Single Ended CATV
Application Circuit (75 Ω)
AH2-PCB
Operation of this device above any of these parameters may cause permanent damage.
Specifications and information are subject to change without notice.
WJ Communications, Inc. • Phone: 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: [email protected] • Web site: www.wj.com
February 2004
AH2
Single - Ended CATV, 75 Ω Evaluation Circuit: 50-860 MHz (AH2 - PCB)
Typical Performance (75 Ohm System)
Frequency
S21
S11
S22
OIP2
OIP3
Noise Figure
Bias
MHz
50
450
dB
14.5
14.5
dB
-11.1 -12.7
dB
-9.5 -22.9
dBm
+46.8 +46.9
dBm
+39.8 +40.7
dB
3.9
3.1
Vdd = 5 V, Id = 150 mA
750
13.7
-14.5
-12.3
+47.7
+41.0
3.2
Schematic
C2
2.2 pF
0603
Multi-Channel Measurements
Parameter
Frequency
CTB
50-550 MHz
CSO
50-550 MHz
XMOD
50-550 MHz
FR4 Board Layout (T = 28 Mils to ground plane)
GND
AH2
L1
12 nH
0603
Value
-71 dBc
-48 dBc
-65 dBc
Note: 77 Channels, 50-550 MHz, +34 dBmV/channel, flat-loading
C3
1000 pF
0603
C1
1000 pF
0603
RF IN
860
13.2
-18.3
-10.6
+48.1
+40.8
3.2
All Trans. Lines Z - 75 Ohm
RF OUT
L2
270 nH
1008
AH2
C1
L1
C3
DC +5 V
OUTPUT
INPUT
C4
1000 pF
0603
3 or moreVia
Grounds req.
L2
GND
C2
Place inductor close to input
Length less than 100 mil
+5 V
C4
Note: 0.5 dB of gain slope is due to the connector and board losses.
Input / Output Return Loss and
Isolation
Linearity vs. Frequency
-10
S11
-20
S12
45
40
35
0
200
400
600
Frequency (MHz)
800
200
800
1000
0
400
600
Frequency (MHz)
800
1000
800
1000
Noise Figure
45
OIP3
Frequency = 450 MHz
-50
CSO
-60
XMOD
Noise Figure (dB)
77 Channel Flat Loading, +34 dBmV Output Power
OIP2
35
200
5
-40
dBc
Intercept Point (dBm)
400
600
Frequency (MHz)
CTB, CSO, and XMOD
vs. Frequency
55
40
14
10
0
1000
OIP2 and OIP3 vs. Power
50
16
12
OIP3
-30
-40C
+25C
+85C
18
OIP2
50
S21 (dB)
Intercept Point (dBm)
S22
Magnitude (dB)
Gain
20
55
0
-70
4
3
2
1
30
CTB
0
-80
25
-4
-2
0
2
4
6
Output Power (dBm)
8
10
0
100
200
300
400
Frequency (MHz)
500
600
0
200
400
600
Frequency (MHz)
WJ Communications, Inc. • Phone: 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: [email protected] • Web site: www.wj.com
February 2004
AH2
Push-Pull, 75 Ω CATV Evaluation Circuit: 50-860 MHz
Typical Performance (75 Ohm System)
Frequency
S21
S11
S22
OIP2
OIP3
Noise Figure
Bias
Multi-Channel Measurments
MHz
50
450
dB
11.1
10.8
dB
-10.2
-9.7
dB
-13.3 -14.1
dBm
72.0
70.0
dBm
42.0
43.0
dB
5.5
4.3
Vdd = 5 V, Id = 300 mA
750
10.6
-10.8
-15.4
72.0
41.0
5.0
Parameter
CTB
CSO
XMOD
860
10.5
-11.0
-16.4
70.0
40.0
5.4
Frequency
50-550 MHz
50-550 MHz
50-550 MHz
Value
-72 dBc
-75 dBc
-68 dBc
Note: 77 Channels, 50-550 MHz, +34 dBmV/channel, flat-loaded
Schematic
C3
1000 pF
0603
R2
560 Ω
0603
DC +5 V
L2
470 nH
1008
C2
100 pF
0603
70
R2
C5
T2
C2
Note: 0.7 dBm of loss is due to the balun and board losses
S21
5
0
-5
S11
77 Channel Flat Loading, +34 dBmV Output Power
OIP2
60
-65
XMOD
50
40
OIP3
30
-70
CTB
-75
20
CSO
10
S22
400
600
Frequency (MHz)
CTB, CSO, and XMOD vs.
Frequency
-60
dBc
Intercept Point (dBm)
Magnitude (dB)
80
10
200
AH2
Linearity vs. Frequency
15
0
C3
RF OUT
Core: TOK H5C2-T3.1-1.3-1.3
Wire: MWS B2383211
S-Parameters
-20
C1
R1
C5
1000 pF
0603
3 or more Via
Grounds req.
-10
or
MACOM
ETC1-1-13
surface-mount
BALUN
C4
AH2
T1
6 Turns bifilar
wire around
ferrite core
L1
470 nH
1008
AH2
-15
Interior Trans. Lines Z = 37.5 Ohm
T2
AH2
T1
6 Turns bifilar
RF IN wire around
ferrite core
FR4 Board Layout (T = 28 Mils to ground Plane)
C4
1000 pF
0603
C1
100pF
0603
R1
560 Ω
0603
-80
0
800
1000
0
200
400
600
Frequency (MHz)
800
1000
0
100
200
300
400
Frequency (MHz)
WJ Communications, Inc. • Phone: 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: [email protected] • Web site: www.wj.com
500
600
February 2004
AH2
Typical Test Data
S-Parameters (Vds = +5 V, Ids = 150 mA, T = 25°C, unmatched device in a 75 ohm system)
Freq. (MHz)
S11 (dB)
S11 (Ang)
S21 (dB)
S21 (Ang)
S12 (dB)
S12 (Ang)
S22 (dB)
S22 (Ang)
50
100
150
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
-18.00
-17.80
-16.90
-16.00
-14.55
-12.92
-12.35
-11.65
-11.00
-10.43
-9.88
-9.44
-9.00
-8.56
-8.23
-7.88
-7.53
-7.25
-6.97
-6.72
-34.61
-42.76
-48.97
-53.88
-58.61
-65.22
-71.82
-77.23
-82.95
-87.24
-91.75
-95.68
-99.68
-102.92
-106.2
-109.41
-112.2
-114.93
-117.87
-120.3
15.49
15.43
15.37
15.31
15.22
15.14
15.06
14.97
14.86
14.75
14.63
14.50
14.37
14.23
14.09
13.92
13.76
13.62
13.45
13.29
173.26
171.19
168.08
164.88
162.05
158.92
155.7
152.52
149.40
146.28
143.33
140.18
137.27
134.37
131.52
128.75
126.18
123.48
120.85
118.27
-24.20
-24.14
-24.16
-24.17
-24.14
-24.17
-24.07
-24.10
-23.99
-24.03
-24.00
-23.96
-23.91
-23.94
-23.90
-23.90
-23.84
-23.83
-23.83
-23.81
4.59
2.04
0.99
0.27
0.08
-0.22
-0.74
-1.02
-1.51
-1.44
-2.11
-2.40
-2.75
-3.24
-3.68
-3.95
-4.27
-5.01
-5.79
-5.85
-24.26
-24.75
-23.99
-22.81
-22.96
-23.00
-22.03
-21.07
-20.28
-19.51
-18.84
-18.26
-17.73
-17.21
-16.76
-16.40
-16.02
-15.66
-15.33
-15.04
-85.84
-86.37
-88.74
-91.71
-92.44
-92.45
-96.12
-98.24
-100.75
-102.72
-104.75
-106.88
-108.74
-110.42
-111.98
-113.70
-115.37
-117.11
-119.00
-121.09
WJ Communications, Inc. • Phone: 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: [email protected] • Web site: www.wj.com
February 2004
AH2
Outline Drawing
AH2
XXXX
Alpha - Numeric Lot Code
Land Pattern
Mounting Configuration
WJ Communications, Inc. • Phone: 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: [email protected] • Web site: www.wj.com
February 2004