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SKY12334-362LF: GaAs 5 Bit Digital Attenuator, 5-Bits, 0.5 dB LSB with Serial-to-Parallel Driver 0.7-4 GHz
Features
l l l l l l l l
Functional Diagram
RF 2
Broadband 700 MHz to 4 GHz Attenuation range: 15.5 dB Least significant bit attenuation: 0.5 dB Low insertion loss: 1 dB @ 900 MHz Positive voltage operation (5 V) Integrated silicon serial-to-parallel driver QFN 4 x 4 mm leadless package Available lead (Pb)-free, RoHS-compliant, and GreenTM, MSL-1 @ 260 C per JEDEC J-STD-020
VCC 8 dB SERDATAOUT 4 dB SERDATAIN Serial to parallel driver
2 dB
Description
The SKY12334-362LF is a GaAs FET IC 5-bit digital attenuator with a Si serial-to-parallel driver packaged in a 24-pin leadless exposed pad plastic package. It is particularly well suited for applications in which high attenuation accuracy, low insertion loss, and low intermodulation products are required. Typical applications include base station, wireless and wireless local loop gain control circuits.
LATCH ENABLE
1 dB
CLOCKIN 0.5 dB RESET
RF 1
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.
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
201031 Rev. B * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * May 8, 2009
1
Data Sheet * SKY12334-362LF
Electrical Specifications
VCC = 3-5 V, VCTL = 0/3 V, 5 V, T = 25 C, PINPUT = 0 dBm, Z0 = 50 W, unless otherwise noted
Parameter Insertion loss Condition Frequency 0.7-1.4 GHz 1.4-2.3 GHz 2.3-2.7 GHz 2.7-4.0 GHz Attenuation referred to insertion loss All attenuation states RF1 and RF2, all atten. states 0.7-0.9 GHz 0.9-2.2 GHz 2.2-4.0 GHz 0.7-1.4 GHz 1.4-2.3 GHz 2.3-2.7 GHz 2.7-4.0 GHz Min. typ. 1.2 1.3 1.8 2.0 15.5 (0.5 + 5% of Atten. Setting) Max. (0.3 + 4% of Atten. Setting) Max. (0.5 + 5% of Atten. Setting) Max. 12 15 12 10 14 18 15 13 Max. 1.5 2.0 2.3 2.7 Unit dB dB dB dB dB dB dB dB dB dB dB dB
Attenuation range Attenuation accuracy
Return loss
Operating Characteristics
VCC = 3-5 V, VCTL = 0/3 V, 5 V, T = 25 C, PINPUT = 0 dBm, Z0 = 50 W, unless otherwise noted
Parameter Switching characteristics: On/rise time Off/fall time Input power for 0.1 dB compression Input power for 1.0 dB compression Condition 50% VCTL to 90% RF or 10/90% RF 50% VCTL to 10% RF or 90/10% RF VCC = VCTL = 5 V VCC = VCTL = 3 V VCC = VCTL = 5 V VCC = VCTL = 3 V 0.7-3.8 GHz 0.7-3.8 GHz 0.7-3.8 GHz 0.7-3.8 GHz Frequency Min. typ. 1200 500 25 23 32 30 Max. Unit ns ns dBm dBm dBm dBm
Input Intermodulation Intercept Point (IIP3) For two tone input power, 0 dBm/tone, 1 MHz spacing. VCC = VCTL = 5 V VCC = VCTL = 3 V
0.7-3.8 GHz 0.7-3.8 GHz
42 42
dBm dBm
DC Characteristics
Parameter Input voltage high Input voltage low Input leakage current Quiescent current Supply voltages (VCC) Condition Symbol VIH(1) VCC = +3 V VCC = +5 V VIL(0) VCC = +3 V VCC = +5 V IL ICC VCC 3 Min. 2.3 3.5 0 0 0.5 500 5 5.5 typ. Max. 3 5 1.0 1.5 Unit V V V V A A V
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com 2
May 8, 2009 * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * 201031 Rev. B
Data Sheet * SKY12334-362LF
Absolute Maximum Ratings
Characteristic RF input power @ 5 V Supply voltage (VCC) Control voltage Operating temperature Storage temperature Value 30 dBm 6V -0.2 V, +8 V -40 C to +85 C -65 C to +150 C
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: 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.
Electrical Specifications
VCC = 5 V, VCTL = 0/5 V, T = 25 C, PINPUT = 0 dBm, Z0 = 50 W, CBLK = 47 pF unless otherwise noted
0.0 -0.5 -40 C 25 C 85 C 0.0 -5.0 0.5 dB 8 dB 1 dB 15.5 dB 2 dB 4 dB Insertion Loss
Insertion Loss (dB)
-1.0
Return Loss (dB)
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
-1.5 -2.0 -2.5 -3.0 -3.5 -4.0
-10.0 -15.0 -20.0 -25.0 -30.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Frequency (GHz)
Insertion Loss
Frequency (GHz)
Return Loss: Major States
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
201031 Rev. B * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * May 8, 2009
3
Data Sheet * SKY12334-362LF
Electrical Specifications
VCC = 5 V, VCTL = 0/5 V, T = 25 C, PINPUT = 0 dBm, Z0 = 50 W, CBLK = 47 pF unless otherwise noted
0.5 dB 0 4 dB 1 dB 8 dB 2 dB 15.5 dB 1.0 0.9 GHz 1.9 GHz 2.4 GHz 3.5 GHz
Normalized Attenuation (dB)
-2.0 -4.0 -6.0 -8.0 -10.0 -12.0 -14.0 -16.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Attenuation Bit Error (dB)
0.8 0.5 0.3 0.0 -0.3 -0.5 0 2 4 6 8 10 12 14 16
Attenuation State (dB)
Frequency (GHz)
Normalized attenuation: Major States
0.5 dB 3.0 2.5 4 dB 1 dB 8 dB 2 dB 15.5 dB
attenuation Bit error vs. attenuation State
0.5 dB 60 4 dB 1 dB 8 dB 2 dB 15.5 dB
Attenuation Bit Error (dB)
2.0 1.5 1.0 0.5 0.0 -0.5 -1.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Relative Phase (Degrees)
40 20 0 -20 -40 -60
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Frequency (GHz)
Frequency (GHz)
attenuation Bit error: Major States
1.2 1.0 0.8 0.6 0.4 0.2 0.0 -0.2 -0.4 -0.6 -0.8 -1.0 -1.2
Relative Phase: Major States
Attenuation Step Error (dB)
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Frequency (GHz)
Worst Case attenuation Step error Between Successive attenuation States
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com 4
May 8, 2009 * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * 201031 Rev. B
Data Sheet * SKY12334-362LF
Pin Out (Top View)
Gnd Gnd Gnd Gnd Gnd Gnd
24 23 22 21 20 19
Pin Table
Pin # 1
18 17 16 Ground exposed pad 15 14 13 12
Name Gnd RF1 Gnd Gnd Gnd Reset Clock Ground
Description RF input/output must be DC blocked Ground Ground Ground Reset clears shift registers Serial clock input
CBLK
Gnd RF1 Gnd Gnd
1 2 3 4 5 6
Gnd RF2 Gnd Gnd VCC Gnd
2
CBLK
3 4 5 6 7
CBP
5k
Serial output Data input delayed by 8 clock cycles
Serial Output Gnd
8 9 10 11 12 13 14 15 16 17
7
8
9
10
11
Latch enable On rising edge of pulse, shifts 5 most recent bits clocked in to set attenuation state Gnd Serial input Gnd Gnd VCC Gnd Gnd RF2 Gnd Gnd Gnd Gnd Gnd Gnd Gnd Ground input data Ground Ground Fixed bias for SPI Ground Ground RF input/output must be DC blocked Ground Ground Ground Ground Ground Ground Ground
Gnd
Reset
DC blocking caps required on RF1 and RF2 ports. Recommend 47 to 300 pF. RF2 or RF1 ports needs to be pulled up to VCC voltage. Recommend 5 kW. CBP = CBYPASS = 0.01 F.
Truth Table
Reset 8 dB 1 1 1 1 1 1 1 0
VCC = 5 V "0" = 0-0.5 V "1" = 3.5-5 V "X" = Don't Care
Latch enable
Serial input
Clock
Gnd
Serial Data Input 4 dB 1 1 1 1 0 1 0 X 2 dB 1 1 1 0 1 1 0 X 1 dB 1 1 0 1 1 1 0 X 0.5 dB 1 0 1 1 1 1 0 X 1 1 1 1 1 0 0 X
RF In/Out attenuation Insertion Loss 0.5 dB 1 dB 2 dB 4 dB 8 dB 15.5 dB 15.5 dB
18 19 20 21 22 23 24
VCC = 3 V "0"= 0-0.5 V "1"= 2.3-3 V "X"= Don't Care
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
201031 Rev. B * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * May 8, 2009
5
Data Sheet * SKY12334-362LF
Data Feedthrough
LE
tlsup ts
th
fclk
SCK
SDA
Data at Parallel Outputs
Latched Data (Old)
New Data Loaded
tpd
VCC = 5 V Parameter Serial input setup time Hold time from serial input to shift clock Setup time from shift clock to latch enable Propagation delay, latch enable to C0.5 through C8 Setup time from reset to shift clock Clock freq Symbol ts th tlsup tpd fclk 20 30 40 30 50 Min. typ. 5 5 100 Max. Min.
VCC = 3 V typ. 5 5 70 10 Max. Unit ns ns ns ns ns MHz
Latch enable X X
Clock X X
Reset L H H Shift register cleared Shift register clocked
Function
Contents of shift register transferred to digital attenuator
Serial data (SDA) is shifted into the register on the rising edge of the clock (SCK), least significant bit (LSB) first. The attenuator will change states on the rising edge of the latch enable (LE) signal, according to the most recent 5 bits of shifted data accepted since the previous falling edge of the LE signal. The part includes a serial data output pin that can be used to provide the serial data input to a cascaded attenuator. The serial data output is the serial input data delayed by 8 clock cycles.
Power-up sequence: 0. Connect ground 1. Apply VCC 2. Set all inputs (SCK, SDA, LE) Power-down sequence should be the reverse of above.
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com 6
May 8, 2009 * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * 201031 Rev. B
Data Sheet * SKY12334-362LF
Example for Setting 0.5 dB State
0.5 dB state
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
201031 Rev. B * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * May 8, 2009
7
Data Sheet * SKY12334-362LF
Evaluation Circuit Board
SK41092-1 REV1 RF1 ATTENUATOR TEST BOARD
24 19 1 18
Park Marking
RF2 R1 C3
Pin 1 Indicator
Pin 24 Skyworks P/N
*
C1
*
C2
6
13
7
12
Pin 1
SMA -362 4MM X 4MM QFN SDO ___ RST VCC CLK SDI SMA
A
C1 = C2 = 47-300 pF. C3 = 0.01 F. R1 = 5k W.
A
S2334 XXXX YWW
Top View Pin 24
Lot #
LE
Date Code Y= Calender Year WW= Week
Pin 1
Exposed Pad
Bottom View
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May 8, 2009 * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * 201031 Rev. B
Data Sheet * SKY12334-362LF
-362 QFN 4 x 4 mm 24-Lead Outline
0.157 (4 mm) Pin 1 Indicator 0.157 (4 mm) 0.008 Ref. (0.20 mm) Seating Plane 0.02 mm + 0.03 mm 0.02 mm - 0.02 mm
-362 QFN 4 x 4 mm 24-Lead Suggested Land Pattern
1.60 (To Metal Pads)
R0.20
0.50
24X 0.035 (0.90 mm) 0.004 (0.10 mm)
0.25 4x Plated Thru Vias See Detail A Metal Gnd Pad (Sq.) 2.70
0.106 (2.70 mm) + 0.004 (0.10 mm) 0.106 (2.70 mm) - 0.006 (0.15 mm)
Exposed Pad See Detail A
0.25
0.098 (2.500 mm)
0.106 (2.70 mm) + 0.004 (0.10 mm) 0.106 (2.70 mm) - 0.006 (0.15 mm)
0.60
Exposed Soldering Area
Detail A Detail C 0.098 (2.500 mm) Detail B 4 Places
Recommended Solder Reflow Profiles
Refer to the "Solder Reflow Information" Application Note, document number 200164.
R0.20
0.014 (0.35 mm) 0.004 (0.10 mm)
Tape and Reel Information
0.25 mm + 0.05 mm 0.25 mm - 0.07 mm
Detail A 0.019 (0.5 mm)
Detail C
Refer to the "Discrete Devices and IC Switch/Attenuators Tape and Reel Package Orientation" Application Note, document number 200083.
0.0100 (0.25 mm)
CL Detail B 1. Dimensioning and tolerancing per ASME Y14.5m - 1994. 2. Dimensions are in inches and (millimeters). Controlling dimension is millimeters. 3. Coplanarity applies to the exposed heat sink slug as well as the terminals. 4. Plating requirement per source control drawing (SCD) 2504.
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
201031 Rev. B * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * May 8, 2009
9
Data Sheet * SKY12334-362LF
Copyright (c) 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.
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