data sheet SKY12329-350LF: GaAs Digital Attenuator 5-Bit, 1 dB LSB 400 MHz–4 GHz Functional Block Diagram Applications l l RF Input/Output T ransceiver transmit automatic level control or receive automatic gain control in WiMAX, GSM, CDMA, WCDMA, WLAN, Bluetooth®, Zigbee®, Land Mobile Radio Base stations or Terminal Equipment G eneral purpose signal attenuation in telecommunications and instrumentation applications V1 1 dB V2 2 dB V3 4 dB V4 8 dB V5 16 dB Features B roadband: 400 MHz–4 GHz A ttenuation range: 31 dB l L east significant bit attenuation: 1 dB l L ow insertion loss: 1.2 dB @ 900 MHz l S ingle positive control voltage: 2.7–5.5 V l L ow current consumption: <100 µA @ 5 V l S mall QFN-16 3 x 3 mm package with exposed paddle l L ead (Pb)-free and RoHS-compliant MSL-1 @ 260 °C per JEDEC J-STD-020 l l RF Input/Output Description The SKY12329-350LF is a monolithic GaAs, binary-weighted, 5-bit, single positive control voltage digital attenuator which operates from 400 MHz–4 GHz. The attenuator has a least significant bit (LSB) of 1 dB and total attenuation of 31 dB. The two RF ports are bilateral; each can be used as the RF input or the RF output. This attenuator requires an external supply voltage of 2.7–5.5 V. The SKY12329-350LF is comprised of 5 fixed attenuators in cascade, each of which having a shunt bypass switch. Beginning at the LSB, which is 1 dB, each succeeding fixed attenuator produces twice the attenuation of the preceding stage. The state of each bypass switch is controlled by the logic level voltage applied to the associated control voltage input; a logic high voltage closes the associated switch, thereby bypassing that fixed attenuator stage, and a logic low opens the switch to force the input signal to that stage through the associated attenuator. DC power consumption is very low, 100 µA maximum with control voltage and supply voltage of 5 V. The switch can operate over the temperature range of -40 °C to +85 °C. An evaluation board is available upon request. NEW Skyworks offers lead (Pb)-free, RoHS (Restriction of Hazardous Substances)-compliant packaging. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 200709 Rev. F • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 20, 2009 1 Data Sheet • SKY12329-350LF Electrical Specifications VCTL = 0 V/5 V, T = 25 °C, PINPUT = 0 dBm, ZO = 50 W, unless otherwise noted Parameter Condition Insertion loss Frequency Min.Typ. 0.4–1.0 GHz 1.0–2.0 GHz 2.0–3.0 GHz 3.0–4.0 GHz Attenuation range 1.2 1.5 1.8 2.7 Max. Unit 1.6 1.9 2.2 3.1 dB dB dB dB 31 Attenuation accuracy Attenuation referred to insertion loss. All attenuation states 0.4–1.0 GHz ± (0.35 + 3% of attenuation setting in dB) All attenuation states 1.0–3.0 GHz ± (0.3 + 3% of attenuation setting in dB) 1–15 dB attenuation states 3.0–4.0 GHz ± (0.5 + 5% of attenuation setting in dB) 16–31 dB attenuation states 3.0–4.0 GHz ± (0.6 + 6% of attenuation setting in dB) Return loss 0.4–1.0 GHz 1.0–4.0 GHz 7 10 dB dB dB dB dB dB dB Operating Characteristics VCTL = 0 V/5 V, T = 25 °C, PINPUT = 0 dBm, ZO = 50 W, unless otherwise noted Parameter Condition Frequency Min.Typ. Max. Switching characteristics On/rise time 50/90% or 10/90% RF 150 Off/fall time 50/10% or 90/10% RF 500 900 MHz 900 MHz Unit ns ns Input power for 1 dB compression VLOW = 0 V, VHIGH = 3 V VLOW = 0 V, VHIGH = 5 V 29 31 dBm dBm Input third order intermodulation intercept For two input tones. +5 dBm each tone VLOW = 0 V, VHIGH = 3 V 1–4 GHz 39 VLOW = 0 V, VHIGH = 5 V 1–4 GHz 41 dBm dBm Thermal resistance Junction to package terminal °C/W Supply voltage Control voltage High Low Control port current VCTL = VHIGH VCTL = VLOW 2 45 VHIGH - 0.2 2.7 -0.2 15 5 VHIGH + 0.2 V 5.5 0.2 V V 100 20 µA µA Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com February 20, 2009 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • 200709 Rev. F Data Sheet • SKY12329-350LF Typical Performance Data VCTL = 0 V/5 V, T = 25 °C, PINPUT = 0 dBm, ZO = 50 W, unless otherwise noted 0 1 dB 7 dB 13 dB 19 dB 25 dB 31 dB -0.4 -1.2 -1.6 -2.0 -2.4 -2.8 -3.2 -3.6 -4.0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 Attenuation (dB) Insertion Loss (dB) -0.8 Frequency (GHz) Insertion Loss vs. Frequency 0 -2 -4 -6 -8 -10 -12 -14 -16 -18 -20 -22 -24 -26 -28 -30 -32 0 0.5 2 dB 8 dB 14 dB 20 dB 26 dB 1.0 3 dB 9 dB 15 dB 21 dB 27 dB 1.5 2.0 4 dB 10 dB 16 dB 22 dB 28 dB 2.5 3.0 5 dB 11 dB 17 dB 23 dB 29 dB 3.5 6 dB 12 dB 18 dB 24 dB 30 dB 4.0 4.5 Frequency (GHz) attenuation vs. Frequency1 1 dB 7 dB 13 dB 0 2 dB 8 dB 14 dB 3 dB 9 dB 15 dB 4 dB 10 dB 5 dB 11 dB 6 dB 12 dB -15 18 dB 24 dB 30 dB 19 dB 25 dB 31 dB 20 dB 26 dB 21 dB 27 dB -19 Attenuation (dB) -4 Attenuation (dB) 17 dB 23 dB 29 dB -17 -2 -6 -8 -10 -12 -21 -23 -25 -27 -29 -31 -14 -16 16 dB 22 dB 28 dB -33 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 Frequency (GHz) vs. Frequency1 attenuation 1–15 dB 4.5 -35 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 Frequency (GHz) attenuation vs. Frequency1 16–31 dB 1. Attenuation normalized to insertion loss Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 200709 Rev. F • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 20, 2009 3 Data Sheet • SKY12329-350LF 0 3 dB 9 dB 15 dB 21 dB 27 dB 2 dB 8 dB 14 dB 20 dB 26 dB 1 dB 7 dB 13 dB 19 dB 25 dB 0 -5 -5 -10 -10 -15 -20 -25 -30 -30 -40 1.0 1.5 2.0 2.5 3.0 3.5 4.0 -45 4.5 5 dB 11 dB 17 dB 23 dB 29 dB 4 dB 10 dB 16 dB 22 dB 28 dB -25 -35 0.5 3 dB 9 dB 15 dB 21 dB 27 dB -20 -40 -45 2 dB 8 dB 14 dB 20 dB 26 dB 1 dB 7 dB 13 dB 19 dB 25 dB 31 dB -15 -35 0 Ins. Loss 6 dB 12 dB 18 dB 24 dB 30 dB 5 dB 11 dB 17 dB 23 dB 29 dB Return Loss (dB) Return Loss (dB) 4 dB 10 dB 16 dB 22 dB 28 dB 31 dB Ins. Loss 6 dB 12 dB 18 dB 24 dB 30 dB 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 Frequency (GHz) Frequency (GHz) Input Return Loss vs. Frequency Output Return Loss vs. Frequency Truth Table 4.5 Absolute Maximum Ratings V1 V2 V3 V4 VHIGH VHIGH VHIGH VHIGH VHIGH V5Attenuation Reference insertion loss VLOW VHIGH VHIGH VHIGH VHIGH 1 dB RF input power VHIGH VHIGH VLOW VHIGH VHIGH VHIGH 2 dB Control voltage range -0.2 < VC < 8 V VHIGH VLOW VHIGH VHIGH 4 dB Operating temperature range -40 °C to +85 °C VHIGH VHIGH VHIGH VLOW VHIGH 8 dB Storage temperature range -65 °C to +150 °C VHIGH VHIGH VHIGH VHIGH VLOW 16 dB VLOW VLOW VLOW VLOW VLOW 31 dB 2.7 V < VHIGH < 5.5 V, VS = VHIGH ± 0.2 V, 0 < VLOW < 0.2 V. Part Marking Lot Number S329 XXXX YWW Part No. Date Code Y = Calendar Year WW = Week Characteristic Value 33 dBm for f > 400 MHz, VCTL = 0/8 V 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. CAUTION: A lthough 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. Recommended Solder Reflow Profiles 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. 4 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com February 20, 2009 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • 200709 Rev. F Data Sheet • SKY12329-350LF Pin Out SKY12329-350LF Evaluation Circuit PCB 15 14 13 GND 1 12 V5 RF1 2 11 RF2 NC 3 10 NC GND 4 9 GND 5 6 7 8 GND GND GND GND V5 16 V4 V4 V3 V3 V2 V1 V2 VSS V1 Pin Descriptions Pin Number 1, 4–9 2 3, 10 11 12 Pin Name Description GNDEquipotential Point—Equipotential points for control voltages and RF circuits. Must be connected to PCB ground via lowest possible N/C V1 VS R1 RF1RF Input/Output—RF input or output port. A DC block is required for this port. R2 V2 R3 16 V3 R4 15 V4 V5 R5 14 R6 13 No connection 1 RF2RF Input/Output—RF input or output port. A DC block is required for this port. RF1 13 V4Control Voltage—Control voltage input for 8 dB weighted bit 14 V3Control Voltage—Control voltage input for 4 dB weighted bit 15 V2Control Voltage—Control voltage input for 2 dB weighted bit 16 V1Control Voltage—Control voltage input for 1 dB weighted bit (LSB) The evaluation board for SKY12329-350LF allows the part to be fully exercised. The insertion loss of the transmission lines between J1–U1 and U1–J2 can be determined by measuring the performance of the calibration through line, which contains two DC block capacitors (560 pF) in identical positions to the DC blocks present in the main circuit. The state of the SKY12329-350LF is controlled by applying the appropriate logic level voltages to ports V1 through V5, per the Truth Table 12 C1 2 V5Control Voltage—Control voltage input for 16 dB weighted bit (MSB) Evaluation Board SKY12329-350LF Evaluation Circuit NC 3 10 4 9 5 6 7 C2 11 SKY1329-350LF RF2 NC 8 C3 C4 Through Line Evaluation Board Components Component Description Default C1–C4 DC blocking capacitor 560 pF, size 0402 R1 RF block 10k W, size 0402 R2–R6 Current limiting 100 W U1 J1, J2 SKY12329-350LF GaAs digital attenuator SMA connectors CAUTION: A lthough 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. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 200709 Rev. F • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 20, 2009 5 Data Sheet • SKY12329-350LF Land Pattern -350 (QFN 3 x 3) 16X 1.10 0.008 (0.20 mm) Seating Plane 0.118 (3.00 mm) Pin 1 Indicator 0.225 X 45° 0.001 (0.02 mm) 0.118 (3.00 mm) 0.25 1.70 0.067 (1.70 mm) ± 0.004 (0.10 mm) 4x Plated Exposed Pad 0.029 (0.73 mm) 0.030 (0.75 mm) ± 0.002 (0.05 mm) Thru Via 12X 0.50 Pitch See Detail A 0.067 (1.70 mm) ± 0.004 (0.10 mm) 0.059 (1.500 mm) Metal Gnd Pad 1.70 0.059 (1.500 mm) 0.25 Exposed Solder Area 0.60 Detail A 6 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com February 20, 2009 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • 200709 Rev. F Data Sheet • SKY12329-350LF Copyright © 2007, 2008, 2009, 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 • [email protected] • www.skyworksinc.com 200709 Rev. F • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 20, 2009 7