Document
ACA2402
750/870 MHz CATV Push-Pull Line Amplifier
PRELIMINARY DATA SHEET - Rev 1.2
FEATURES
• • • • • • • 22 dB Gain Very Low Distortion Excellent 75 Ω Input and Output Match 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 Meets Cenelec Standards
• Low Cost Alternative to Hybrids www.DataSheet4U.com •
APPLICATIONS
• CATV Line Amplifiers, System Amplifiers, Distribution Nodes
S7 Package 16 Pin Wide Body SOIC with Heat Slug
PRODUCT DESCRIPTION
The ACA2402 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 ACA2402 is cascaded between two appropriate transmission line baluns.
1A RF Input
2A
RF Output 1B 2B
ACA2402
Figure 1: Hybrid Application Diagram
11/2002
ACA2402
1 2 3 4 5 6 7 8
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GND 2A IN GND 1A IN 1B IN I SET 2B IN GND
Figure 2: Pin Out
GND 1A OUT Bias 1A 2A OUT 2B OUT Bias 1B 1B OUT GND
16 15 14 13 12 11 10 9
Table 1: Pin Description
PIN 1 2 3 4 5 6 7 8 NAME GND 2AIN GND 1AIN 1BIN ISET 2BIN GND DESCRIPTION Ground Amplifier 2A Input Ground Amplifier 1A Input Amplifier 1B Input Current Adjust Amplifier 2B Input Ground PIN 16 15 14 13 12 11 10 9 NAME GND 1AOUT B i as 1A 2AOUT 2BOUT B i as 1B 1BOUT GND DESCRIPTION Ground Amplifier 1A Output Bias for 1A Amplifier Amplifier 2A Output and Supply Amplifier 2B Output and Supply Bias for 1B Amplifier Amplifier 1B Output Ground
2
PRELIMINARY DATA SHEET - Rev 1.2 11/2002
ACA2402
ELECTRICAL CHARACTERISTICS
Table 2: Absolute Mimimum and Maximum Ratings
PARAMETER
Supply (pins 12, 13) RF Power at Inputs (pins 4, 5) Storage Temperature Soldering Temperature Soldering Time
MIN
0 -65 -
MAX
+28 +75 +150 +260 5.0
UNIT
VD C dBmV °C °C S ec
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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. 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. No external DC bias should be applied. 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. No other external bias should be applied.
Table 3: Operating Ranges
PARAMETER
Supply: VDD (pins 12, 13) RF Frequency Case Temperature
MIN
40 -40
TYP
+24 -
MAX
870 +110
UNIT
VD C MHz °C
The device may be operated safely over these conditions; however, parametric performance is guaranteed only over the conditions defined in the electrical specifications.
PRELIMINARY DATA SHEET - Rev 1.2 11/2002
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ACA2402 Table 4: AC and DC Electrical Specifications (TA = +25 °C, VDD = +24 VDC)
PARAMETER
Gain @ 870 MHz (1) Cable Equivalent Slope Gain Flatness Noise Figure
(1) (1)
MIN
21.3 -
TYP
21.8 0 ± 0.2 3.5 -76 -73 -70 -72 -72 -69 -65 -65 -62 22 250 -
MAX
22.3 4.0 -74 -71 -70 -70 -63 -63 260 3.8
UNIT
dB dB dB dB
COMMENTS
@ 870 MHz
(1)
CTB (1) 77 Channels (2) 110 Channels (3) 128 Channels (4) CSO (1) 77 Channels (2) www.DataSheet4U.com 110 Channels (3) 128 Channels (4) XMOD (1) 77 Channels (2) 110 Channels (3) 128 Channels (4) Return Loss (Input/Output) (1) Supply Current (5) Thermal Resistance
dB c
dB c
18 240 -
dB c dB mA
o
75 Ω system
C/W
Notes: (1) Measured with baluns on the input and output of the device. (2) Parts measured with 77 channels flat output, +42 dBmV per channel. (3) Parts measured with 110 channels flat output, +40 dBmV per channel. (4) Parts measured with 128 channels flat output, +40 dBmV per channel. (5) The supply current may be reduced by decreasing the value of R3 (see Figure 17). 6. All specifications as measured on Evaluation Board (see Figures 16 & 17).
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PRELIMINARY DATA SHEET - Rev 1.2 11/2002
ACA2402
PERFORMANCE DATA
Figure 3: Noise Figure vs. Frequency
5
4.5
Noise Figure (dB)
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4
3.5
3
2.5
2 0 100 200 300 400 500 600 700 800 900 1000
Frequency (MHz)
Figure 4: Gain (S21) vs. Frequency
24 23.5 23 22.5
Gain (dB)
22 21.5 21 20.5 20 19.5 19 0 100 200 300 400 500 600 700 800 900 1000
Frequency (MHz)
PRELIMINARY DATA SHEET - Rev 1.2 11/2002
5
ACA2402
Figure 5: Input and Output Return Loss (S11 and S22) vs. Frequency
5 0 -5
Return Loss (dB)
-10 -15 -20 -25
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-35 -40 0 S11 S22
100 100
200
300
400
500
600
700
800
900
1000
Frequency (MHz)
.