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SKY12406-360LF: GaAs IC 1-Bit Digital Attenuator 12 dB LSB 50 MHz-600 MHz
Features
l l l l l
Functional Diagram
RF In/Out
Positive voltage control (0/+3 V) High bit accuracy Low loss Absorptive in 50 W systems Packaged lead (Pb)-free, RoHS-compliant and GreenTM
VCTL1 12 dB
Description
The SKY12406-360LF is a pHEMT GaAs FET IC single bit attenuator packaged in an 2 x 2 mm 8-lead exposed pad plastic package for low-cost commercial applications. This attenuator has an LSB of 12 dB. The SKY12406-360LF is particularly suited where high attenuation accuracy, low insertion loss, and low intermodulation products are required. Typical applications include cellular radio, wireless data, and wireless local loop gain level control circuits.
VCTL2
RF In/Out
NeW
Skyworks GreenTM products are RoHS (Restriction of Hazardous Substances)-compliant, conform to the EIA/EICTA/JEITA Joint Industry Guide (JIG) Level A guidelines, are halogen free according to IEC-61249-2-21, and contain <1,000 ppm antimony trioxide in polymeric materials.
Electrical Specifications
VCTL = 0 V/3 V, T = 25 C, PINPUT = 0 dBm, Zo = 50 W, unless otherwise noted
Parameter Insertion Loss Attenuation Return Loss Frequency 50 MHz-600 MHz 50 MHz-600 MHz 50 MHz-600 MHz 11.6 15 Min. typ. 0.3 12 20 Max. 0.4 12.4 Unit dB dB dB
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
200965 Rev. A * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * October 28, 2008
1
Data Sheet * SKY12406-360LF
operating Characteristics
VCTL = 0 V/3 V, T = 25 C, PINPUT = 0 dBm, Zo = 50 W, unless otherwise noted
Parameter Switching characteristics Rise/fall time On, off time Input power for 1 dB compression Input Intermodulation intercept point (IIP3) Control voltages Control currents Condition 10/90% or 90/10% RF 50% VCTL to 90/10% RF VCTL = 0 V/3 V For two tone input power 10 dBm/tone 1 MHz spacing VCTL = 0/3 V VCTL LOW VCTL HIGH VCTL LOW, VCTL HIGH 50 MHz 600 MHz 50 MHz 600 MHz 18 20 42 44 0 2.7 Frequency Min. typ. 7 8 22 25 46 50 0.2 3.3 50 Max. 35 35 Unit ns ns dBm dBm dBm dBm V V A
1. Switching characteristics will vary with value chosen for CBP.
10
Typical Performance Data
VCTL = 3 V, T = 25 C, PINPUT = 0 dBm, Zo = 50 W, CBLK = 560 pF, CBP = 560 pF, unless otherwise noted
0 -0.1 -0.2 -0.3 -0.4 -11.0 -11.2 -11.4 -11.6 -11.8
dB
-0.6 -0.7 -0.8 -0.9 -1 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
dB
-0.5
-12.0 -12.2 -12.4 -12.6 -12.8 -13.0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Frequency (GHz)
typical Insertion Loss
Input Return Loss Output Return Loss 0 -5 -10 -15 -20
Frequency (GHz)
typical attenuation
Input Return Loss Output Return Loss
0 -5 -10 -15 -20 -25 -30 -35 -40 -45 -50 0
dB
dB
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
-25 -30 -35 -40 -45 -50 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Frequency (GHz)
Frequency (GHz)
typical Return Loss (Insertion Loss State)
typical Return Loss (attenuation State)
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com 2
October 28, 2008 * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * 200965 Rev. A
Data Sheet * SKY12406-360LF
Pin out
Pin 1 Indicator RF1 GND VCTL1 CBP 1 8 RF2
Absolute Maximum Ratings
Characteristic RF input power @ 3 V Operating temperature Value 24 dBm at 50 MHz 27 dBm at 600 MHz -40 C to +85 C -65 C to +150 C
S06
Skyworks P/N Top View Exposed Pad Bottom View
2 3 4
7 6 5
GND VCTL2 GND
Storage temperature
Performance is guaranteed only under the conditions listed in the specifications table and is not guaranteed under the full range(s) described by the Absolute Maximum specifications. Exceeding any of the absolute maximum/minimum specifications may result in permanent damage to the device and will void the warranty.
Pin 8 RF2 GND VCTL2 GND 8 7 6 5 1 2 3 4 RF1 GND
Pin 1
CAUTION: Although this device is designed to be as robust as possible, ESD (Electrostatic Discharge) can damage this device. This device must be protected at all times from ESD. Static charges may easily produce potentials of several kilovolts on the human body or equipment, which can discharge without detection. Industry-standard ESD precautions must be employed at all times.
VCTL1 CBP
Truth Table
VCtL1 1 0 VCtL2 0 1 RF1-RF2 Insertion loss Attenuation
DC blocks are required on RF1 and RF2. CBLK = 560 pF for 50 MHz operation. CBP = 560 pF for 50 MHz operation.
1 = 3 V. 0 = 0 V. Any state other than described in the truth table will put the attenuator in an undefined state. If a non-described state occurs, no damage to the attenuator will occur.
Recommended Solder Reflow Profiles
description RF port Ground DC control voltage RF GND, must be AC coupled to ground Ground DC control voltage Ground RF port Must be connected to RF ground
Pin Descriptions
Pin Number 1 2 3 4 5 6 7 8 Exposed Paddle Pin Name RF1 GND VCTL1 CBP GND VCTL2 GND RF2 Paddle
Refer to the "Recommended Solder Reflow Profile" Application Note.
Tape and Reel Information
Refer to the "Discrete Devices and IC Switch/Attenuators Tape and Reel Package Orientation" Application Note.
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
200965 Rev. A * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * October 28, 2008
3
Data Sheet * SKY12406-360LF
QFN 8L 2 x 2 mm Package
0.20 Ref. Seating Plane 2 Pin 1 Indicator 2
Suggested Land Pattern (Top View)
R 0.20 Pin 1 8X 0.25 8X 0.70 8X 0.45
0.50 Pitch 0.90 0.10 0.90 + 0.10 0.90 - 0.15 0.45 + 0.05 0.45 - 0.07 Exposed Pad 0.50 0.25 + 0.05 0.25 - 0.07 0.30 + 0.01 0.85 + 0.05 0.85 - 0.07 1.70 + 0.10 1.70 - 0.15
0.25 2X 0.85
2X 0.45
Exposed Soldering Area Typ.
Evaluation Board
CBLK = 560 pF (0402 size) 4 places CBP = 560 pF (0402 size) 1 places
VDD Cblk 1 Cblk
*
J1 Cbp
J2
*
VCTL1
VDD/VCTL TEST BOARD:SINGLE BIT ATTN -360 MLPD SMA SK40940-1 REV 1 Cblk Cblk VCTL
VCTL2 GND
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com 4
October 28, 2008 * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * 200965 Rev. A
*
Data Sheet * SKY12406-360LF
Copyright (c) 2008, 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, the Skyworks symbol, and "Breakthrough Simplicity" are trademarks or registered trademarks of Skyworks Solutions, Inc., 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.
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
200965 Rev. A * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * October 28, 2008
5

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