11/2006
ACA2408
870 MHz, 34 dB Gain
CA TV Push-Pull Line Amplifier
PRELIMINARY DA TA SHEET - Rev 1.2
Figure 1: Hybrid Application Diagram
FEATURES
• 34 dB Gain
• Very Low Distortion
• Stable with High VSWR Load Conditions
• Monolithic Design for Consistent Performance
Part-to-Part
• Low DC Power Consumption
• Surface Mount Package Compatible with
Automatic Assembly
• Low Cost Alternative to Hybrids
• RoHS Compliant Package Option
APPLICATIONS
• Line Extenders, Apartment House Amplifiers,
System Amplifiers, Distribution Nodes S7 Package
16 Pin Wide Body SOIC
with Heat Slug
PRODUCT DESCRIPTION
The ACA2408 is a highly linear, monolithic GaAs RF
amplifier that has been developed to replace, in new
designs, standard CATV hybrid amplifiers. Offered in
a convenient surface mount package, the MMIC
consists of two pairs of parallel amplifiers that are
optimized for exceptionally low distortion and noise
figure. A hybrid equivalent that provides flat gain
response and excellent input and output return loss
over the 40 to 870 MHz CATV downstream
band is formed when one ACA2408 is cascaded
between two appropriate transmission line baluns.
RF Input
RF Outpu
t
2A
2B1B
1A
ACA2408
1:11:1
2PRELIMINARY DATA SHEET - Rev 1.2
11/2006
ACA2408
Figure 2: Pin Out
Table 1: Pin Description
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
GND GND
I
SET
2A
IN
GND
2B
IN
1B
IN
1A
IN
GND GND
1B
OUT
2B
OUT
2A
OUT
1A
OUT
Bias 1A
Bias 1B
NIP EMAN NOITPIRCSED NIP EMAN NOITPIRCSED
1DNGdnuorG61DNGdnuorG
2A2
NI
tupnIA2reifilpmA51A1
TUO
tuptuOA1reifilpmA
3DNGdnuorG41A1saiBreifilpmAA1rofsaiB
4A1
NI
tupnIA1reifilpmA31A2
TUO
dnatuptuOA2reifilpmA ylppuS
5B1
NI
tupnIB1reifilpmA21B2
TUO
dnatuptuOB2reifilpmA ylppuS
6I
TES
tsujdAtnerruC11B1saiBreifilpmAB1rofsaiB
7B2
NI
tupnIB2reifilpmA01B1
TUO
tuptuOB1reifilpmA
8DNGdnuorG9DNGdnuorG
PRELIMINARY DATA SHEET - Rev 1.2
11/2006 3
ACA2408
Table 2: Absolute Mimimum and Maximum Ratings
ELECTRICAL CHARACTERISTICS
Stresses in excess of the absolute ratings may cause permanent
damage. Functional operation is not implied under these conditions.
Exposure to absolute ratings for extended periods of time may adversely
affect reliability.
Table 3: Operating Ranges
Notes:
1. Pins 2, 4, 5 and 7 should be AC-coupled. No external DC bias should be
applied.
2. Pin 6 should be AC-grounded and/or pulled to ground through a resistor for
current control.
3. Pins 11 and 14 are bias feeds for input amplifiers 1A and 1B. No external
DC bias should be applied.
4. Pins 10 and 15 receive DC bias directly from pins 11 and 14.
The device may be operated safely over these conditions; however, parametric
performance is guaranteed only over the conditions defined in the electrical
specifications.
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4PRELIMINARY DATA SHEET - Rev 1.2
11/2006
ACA2408
T able 4: AC and DC Electrical Specifications
(TA = +25 °C, VDD = +24 VDC)
Notes:
(1) Measured with baluns on the input and output of the device.
(2) Flat output, +44 dBmV per channel.
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PRELIMINARY DATA SHEET - Rev 1.2
11/2006 5
ACA2408
PERFORMANCE DA TA
Figure 3: Gain (S21) vs. Frequency
(TA = +25 °C, VDD = +24 V, 75 ΩΩ
ΩΩ
Ω system)
Figure 4: Input and Output Return Loss (S1 1 and S22) vs. Frequency
(TA = +25 °C, VDD = +24 V, 75 ΩΩ
ΩΩ
Ω system)
33.0
33.5
34.0
34.5
35.0
35.5
36.0
0 100 200 300 400 500 600 700 800 900 1000
Frequency (MHz)
Gain (dB)
-50
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
0 100 200 300 400 500 600 700 800 900 1000
Frequency (MHz)
Return Loss (dB)
S11
S22
6PRELIMINARY DATA SHEET - Rev 1.2
11/2006
ACA2408
Figure 5: Isolation (S12) vs. Frequency
(TA = +25 °C, VDD = +24 V, 75 ΩΩ
ΩΩ
Ω system)
Figure 6: Noise Figure vs. Frequency
(TA = +25 °C, VDD = +24 V)
-50
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
0 100 200 300 400 500 600 700 800 900 1000
Frequency (MHz)
Isolation (dB)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
0 100 200 300 400 500 600 700 800 900 1000
Frequency (MHz)
Noise Figure (dB)
PRELIMINARY DATA SHEET - Rev 1.2
11/2006 7
ACA2408
Figure 7: CTB vs. Frequency
(1 10 channels, +44 dBmV output power , flat output)
Figure 8: CSO vs. Frequency
(1 10 channels, +44 dBmV output power , flat output)
Figure 9: XMOD vs. Frequency
(1 10 channels, +44 dBmV output power , flat output)
-90
-85
-80
-75
-70
-65
-60
-55
-50
-45
-40
0 100 200 300 400 500 600 700 800
Frequency (MHz)
CTB (dBc)
-90
-85
-80
-75
-70
-65
-60
-55
-50
-45
-40
0 100 200 300 400 500 600 700 800
Frequency (MHz)
CSO (dBc)
-90
-85
-80
-75
-70
-65
-60
-55
-50
-45
-40
0 100 200 300 400 500 600 700 800
Frequency (MHz)
XMOD (dBc)
8PRELIMINARY DATA SHEET - Rev 1.2
11/2006
ACA2408
Figure 10: CTB vs. Frequency
(132 channels, +44 dBmV output power , flat output)
Figure 1 1: CSO vs. Frequency
(132 channels, +44 dBmV output power , flat output)
Figure 12: XMOD vs. Frequency
(132 channels, +44 dBmV output power , flat output)
-90
-85
-80
-75
-70
-65
-60
-55
-50
-45
-40
0 100 200 300 400 500 600 700 800 900
Frequency (MHz)
CTB (dBc)
-90
-85
-80
-75
-70
-65
-60
-55
-50
-45
-40
0 100 200 300 400 500 600 700 800 900
Frequency (MHz)
CSO (dBc)
-90
-85
-80
-75
-70
-65
-60
-55
-50
-45
-40
0 100 200 300 400 500 600 700 800 900
Frequency (MHz)
XMOD (dBc)
PRELIMINARY DATA SHEET - Rev 1.2
11/2006 9
ACA2408
R2
C3
ACA2408
215
1
10
12
13
11
9
16
14
8
7
6
5
4
3
GND
ISET
1AIN
1AOUT2AIN
2AOUT
GND
GND
GND
Bias 1B
GND
1BIN
2BIN 1BOUT
2BOUT
Bias 1A
C4
L1
Vt
C6
+24 V
L3 C10 TVS C15
+24 V
L4
C8
C14
C9
RF OUT
L2
C7
C5
C1
C2 C11
RF IN
R3R1
IDD Adjust
T1 T2
(+24 V)
C12
L6
L5
Figure 14: Evaluation Board Schematic
APPLICA TION INFORMA TION
Figure 13: Evaluation Board Layout
10 PRELIMINARY DATA SHEET - Rev 1.2
11/2006
ACA2408
T able 5: Evaluation Board Parts List
Notes:
(1) N connector center pin should be approximately 80 mils in length.
(2) T1, T2, balun: 4.5 turns thru, as shown in Figure 15.
(3) Due to the power dissipation of this device, the printed circuit board should be mounted / attached to a heat sink.
(4) 400 mA minimum current rating.
Figure 15: Balun Drawing
FER NOITPIRCSED YTQ RODNEV N/PRODNEV
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PRELIMINARY DATA SHEET - Rev 1.2
11/2006 11
ACA2408
Figure 16: S7 Package Outline - 16 Pin Wide Body SOIC with Heat Slug
PACKAGE OUTLINE
WARNING
ANADIGICS products are not intended for use in life support appliances, devices or systems. Use of an ANADIGICS
product in any such application without written consent is prohibited.
IMPORTANT NOTICE
ANADIGICS, Inc.
141 Mount Bethel Road
Warren, New Jersey 07059, U.S.A.
Tel: +1 (908) 668-5000
Fax: +1 (908) 668-5132
URL: http://www .anadigics.com
E-mail: Mktg@anadigics.com
ANADIGICS, Inc. reserves the right to make changes to its products or to discontinue any product at any time without
notice. The product specifications contained in Advanced Product Information sheets and Preliminary Data Sheets are
subject to change prior to a product’s formal introduction. Information in Data Sheets have been carefully checked and are
assumed to be reliable; however, ANADIGICS assumes no responsibilities for inaccuracies. ANADIGICS strongly urges
customers to verify that the information they are using is current before placing orders.
PRELIMINARY DATA SHEET - Rev 1.2
11/2006
12
ACA2408
ORDERING INFORMA TION
REDRO REBMUN ERUTAREPMET EGNAR EGAKCAP NOITPIRCSED GNIGAKCAPTNENOPMOC
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