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Document overview
- Manufacturer or author: Provided By digicamel.com
- PDF pages: 14
Technical content
Features
35 dB gain Meets DRFI specification +5 dB margin High-linearity, high-gain integrated amplifier with an adjustable linear attenuator Balanced inputs and outputs matched for a 75 Ω system 0 to 20 dB continuously adjustable attenuation using an external analog control signal Single 12 V supply with 6 W power consumption High-linearity GaAs process Unconditional stability (K factor > 1) Skyworks GreenTM products are compliant with all applicable legislation and are halogen-free. For additional information, refer to Skyworks Definition of GreenTM, document number SQ04–0074.
Description
The ACA1240 is a GaAs based amplifier that contains highly linear amplification and attenuation stages for use in CATV CCAP/EQAM/CMTS modulators and networks. It incorporates a continuously adjustable linear attenuator that is controlled by an external analog voltage. This glitch-free attenuator provides a minimum of 20 dB of continuously variable attenuation and is preceded by a high- linearity pre-amplifier and followed by a high-gain output driver. Both input and output are matched to 75 Ω using balun transformers. The ACA1240 operates from a single 12 V supply and is offered in an 11 mm x 11 mm surface-mount package. A block diagram of the ACA1240 is shown in Figure 1. The device package and pinout are shown in Figure 2. Signal pin assignments and functional pin descriptions are described in Table 1. RF OUT + RF OUT – Preamp Attenuator Output Driver Gain Control+12 V +12 V 204580-001 RF IN + RF IN – Figure 1. ACA1240 Block Diagram
12 V_OUTPUT
Figure 2. ACA1240 Pinout Table 1. ACA1240 Signal Pin Descriptions1
1 TM Device temperature monitor 18 IADJ2 Output amplifier current adjustment
2 PC_1 DC power shutdown 19 RF_OUT- RF output
3 Gain control 0 to 12 V variable attenuator 20 GND Ground
4 RF_IN+ RF input 21 GND Ground
5 GND Ground 22 RF_OUT+ RF output
6 GND Ground 23 12V_OUT +12 V output from device
7 RF_IN- RF input 24 N/C No connection
8 IADJ1 Input amplifier current adjustment 25 +12V +12 supply voltage
1 The ground pad between pins 5/6 and 20/21 must have a low inductance and low thermal resistance connection to the application’s printed circuit board ground plane.
Table 2. Recommended operating conditions are specified in Electrical specifications are provided in Tables 4 through 7. Table 2. ACA1240 Absolute Maximum Ratings1 or below their nominal value. Exceedi ng any of the limits listed here may result in permanent damage to the device. 2 Pins 4 and 7 should be AC-coupled. No external DC bias should be applied. ESD HANDLING: Although this device is designed to be as robust as possible, electrostatic discharge (ESD) can damage this device. potentials of several kilovolts on the human body or equipment, which can discharge without detection. Industry-standard ESD handling precautions should be used at all times. Table 3. ACA1240 General Specifications1 adversely affect reliability.
Table 4. ACA1240 General RF Specifications
50 MHz to 600 MHz
600 MHz to 1218 MHz
Figure 3. VTM vs Case Temperature
Table 5. ACA1240 Adjacent Channel Power Ratio (ACPR) 1 1 ACP specs are relaxed by 3 dB above 600 MHz. Table 6. ACA1240 Distortion Table 7. Bias Control
Figure 10. K vs Frequency (TCASE = +100 C) Gain Control= 12 VDC
Evaluation Board components. by applying logic low level (0 V) to pin 2. bias current above the factory set value.
0 V to 12 V, with 0 V being the minimum gain and 12 V being the
The complete pin functions are shown in Table 9.
- Apply +3 V to pin 2 (to enable the PA).
- Apply 0 to +12 V to pin 3 to adjust Gain.
- Measure RF output power at pins 9 and 10.
Figure 11. ACA1240 Evaluation Board Schematic
Table 8. ACA1240 Evaluation Board Bill of Materials (BOM) Table 9. ACA1240 Signal Pin Functions
2 PC_1
0 V = off,
19 RF_OUT RF output (+12 V through bias inductor)
3 Gain control 0 V = min gain
12 V = max gain 20 GND Ground
4 RF_IN+ RF input (DC block) 21 GND Ground
5 GND Ground 22 RF_OUT+ RF output (+12 V through bias inductor)
7 RF_IN- RF input (DC block) 24 N/C No connection
Figure 13. ACA1240 PCB Layout Footprint Dimensions
Figure 14. ACA1240 Package Dimensions
Figure 15. ACA1240 Tape and Reel Dimensions
DATA SHEET • ACA1240: CATV INFRASTRUCTURE AMPLIFIER 1.2 GHz CCAP/EDGE QAM/CMTS DRIVER Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 14 December 13, 2018 • Skyworks Proprietar y Information • Products and Product Information are Subject to Change Without Notice • 204580G
Ordering Information
Part Number Product Description Component Packaging ACA1240P8 CATV Infrastructure Amplifier 1.2 GHz CCAP/Edge QAM/CMTS Driver 1500-piece tape and reel EVB1240 Evaluation Board part number Copyright © 2017-2018 Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by Skyworks as a service to its customers and may be used for informational purposes only by the customer. Skyworks assumes no responsibility for errors or omissions in these materials or the information contained herein. Skyworks may change its documentation, products, services, specifications or product descriptions at any time, without notice. Skyworks makes no commitment to update the materials or information and shall have no responsibility whatsoever for conflicts, incompatibilities, or other difficulties arising from any future changes. No license, whether express, implied, by estoppel or otherwise, is granted to any intellectual property rights by this document. Skyworks assumes no liability for any materials, products or information provided hereunder, including the sale, distribution, reproduction or use of Skyworks products, information or materials, except as may be provided in Skyworks Terms and Conditions of Sale. THE MATERIALS, PRODUCTS AND INFORMATION ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, INCLUDING FITNESS FOR A PARTICULAR PURPOSE OR USE, MERCHANTABILITY, PERFORMANCE, QUALITY OR NON-INFRINGEMENT OF ANY INTELLECTUAL PROPERTY RIGHT; ALL SUCH WARRANTIES ARE HEREBY EXPRESSLY DISCLAIMED. SKYWORKS DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. SKYWORKS SHALL NOT BE LIABLE FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO ANY SPECIAL, INDIRECT, INCIDENTAL, STATUTORY, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM THE USE OF THE MATERIALS OR INFORMATION, WHETHER OR NOT THE RECIPIENT OF MATERIALS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Skyworks products are not intended for use in medical, lifesaving or life-sustaining applications, or other equipment in which the failure of the Skyworks products could lead to personal injury, death, physical or environmental damage. Skyworks customers using or selling Skyworks products for use in such applications do so at their own risk and agree to fully indemnify Skyworks for any damages resulting from such improper use or sale. Customers are responsible for their products and applications using Skyworks products, which may deviate from published specifications as a result of design defects, errors, or operation of products outside of published parameters or design specifications. Customers should include design and operating safeguards to minimize these and other risks. Skyworks assumes no liability for applications assistance, customer product design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifications or parameters. Skyworks and the Skyworks symbol are trademarks or registered trademarks of Skyworks Solutions, Inc. or its subsidiaries in the United States and other countries. Third-party brands and names are for identification purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference.