data sheet SKY12334-362LF: GaAs 5 Bit Digital Attenuator, 5-Bits, 0.5 dB LSB with Serial-to-Parallel Driver 0.7–4 GHz Functional Diagram Features l l l l l l l l 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. VCC 8 dB SERDATAOUT 4 dB SERDATAIN LATCH ENABLE Description NEW RF 2 Serial to parallel driver B roadband 700 MHz to 4 GHz A ttenuation range: 15.5 dB L east significant bit attenuation: 0.5 dB L ow insertion loss: 1 dB @ 900 MHz P ositive voltage operation (5 V) Integrated silicon serial-to-parallel driver Q FN 4 x 4 mm leadless package A vailable lead (Pb)-free, RoHS-compliant, and Green™, MSL-1 @ 260 °C per JEDEC J-STD-020 2 dB 1 dB CLOCKIN 0.5 dB RESET RF 1 Skyworks Green™ 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 • [email protected] • 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 Condition Insertion loss Frequency Min. 0.7–1.4 GHz 1.4–2.3 GHz 2.3–2.7 GHz 2.7–4.0 GHz Attenuation range Attenuation accuracy Attenuation referred to insertion loss All attenuation states 0.7–0.9 GHz 0.9–2.2 GHz 2.2–4.0 GHz Return loss RF1 and RF2, all atten. states 0.7–1.4 GHz 1.4–2.3 GHz 2.3–2.7 GHz 2.7–4.0 GHz Typ. Max. Unit 1.2 1.3 1.8 2.0 1.5 2.0 2.3 2.7 dB dB dB dB 15.5 dB ± (0.5 + 5% of Atten. Setting) Max. ± (0.3 + 4% of Atten. Setting) Max. ± (0.5 + 5% of Atten. Setting) Max. dB dB dB 12 15 12 10 14 18 15 13 dB dB dB dB 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 Condition Frequency Min. 50% VCTL to 90% RF or 10/90% RF 50% VCTL to 10% RF or 90/10% RF Typ. Max. Unit 1200 500 ns ns Input power for 0.1 dB compression Vcc = Vctl = 5 V Vcc = Vctl = 3 V 0.7–3.8 GHz 0.7–3.8 GHz 25 23 dBm dBm Input power for 1.0 dB compression Vcc = Vctl = 5 V Vcc = Vctl = 3 V 0.7–3.8 GHz 0.7–3.8 GHz 32 30 dBm dBm 0.7–3.8 GHz 0.7–3.8 GHz 42 42 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 DC Characteristics Symbol Min. Max. Unit Input voltage high Parameter VIH(1) Vcc = +3 V Vcc = +5 V 2.3 3.5 3 5 V V Input voltage low VIL(0) Vcc = +3 V Vcc = +5 V 0 0 1.0 1.5 V V Input leakage current Condition IL Quiescent current ICC Supply voltages (VCC) VCC 2 Typ. 0.5 µA 500 3 5 µA 5.5 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com May 8, 2009 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • 201031 Rev. B V Data Sheet • SKY12334-362LF Absolute Maximum Ratings Characteristic Value RF input power @ 5 V 30 dBm Supply voltage (VCC) 6V Control voltage -0.2 V, +8 V Operating temperature -40 °C to +85 °C Storage temperature -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: 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. Electrical Specifications VCC = 5 V, VCTL = 0/5 V, T = 25 °C, PINPUT = 0 dBm, Z0 = 50 W, CBLK = 47 pF unless otherwise noted -40 °C 0.0 25 °C 0.0 -0.5 1 dB 15.5 dB 2 dB 4 dB Insertion Loss -5.0 -1.0 -1.5 Return Loss (dB) Insertion Loss (dB) 0.5 dB 8 dB 85 °C -2.0 -2.5 -3.0 -3.5 -10.0 -15.0 -20.0 -25.0 -4.0 0.5 1.0 1.5 2.0 2.5 Frequency (GHz) Insertion Loss 3.0 3.5 4.0 -30.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 Frequency (GHz) Return Loss: Major States Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • 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 2 dB 15.5 dB -2.0 -4.0 -6.0 -8.0 -10.0 -12.0 -14.0 -16.0 1.0 1.5 0.5 dB 2.0 2.5 3.0 1 dB 8 dB 4 dB 3.0 3.5 10 14 0.3 0.0 -0.3 1.5 1.0 0.5 0.0 -0.5 0.5 1.5 2.0 2.5 3.0 3.5 4.0 6 0.5 dB 8 12 1 dB 8 dB 4 dB 60 2 dB 15.5 dB 20 0 -20 -40 0.5 1.0 1.5 2.0 2.5 3.0 3.5 Frequency (GHz) Frequency (GHz) attenuation Bit error: Major States Relative Phase: Major States 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 4 16 40 -60 1.0 4 attenuation Bit error vs. attenuation State 2 dB 15.5 dB 2.0 0.5 2 Attenuation State (dB) Relative Phase (Degrees) Attenuation Bit Error (dB) 3.5 GHz 0.5 4.0 2.5 Attenuation Step Error (dB) 2.4 GHz 0.8 0 0.5 Normalized attenuation: 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 1.9 GHz -0.5 Frequency (GHz) -1.0 0.9 GHz 1.0 Attenuation Bit Error (dB) 0 Normalized Attenuation (dB) 1 dB 8 dB 4 dB Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com May 8, 2009 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • 201031 Rev. B 4.0 Data Sheet • SKY12334-362LF Gnd Gnd Gnd Gnd Gnd 24 23 22 21 20 19 1 18 Gnd 2 17 RF2 Gnd 3 16 Gnd Gnd 4 15 Gnd 6 7 8 9 10 11 12 Serial input Gnd 13 Gnd Gnd 14 5 Latch enable Serial Output Ground exposed pad Clock RF1 Reset Gnd CBLK Pin Table Gnd Pin Out (Top View) CBLK 1 Gnd Ground 2 RF1 RF input/output must be DC blocked 3 Gnd Ground 4 Gnd Ground Serial output Data input delayed by 8 clock cycles Gnd VCC 7 Reset Reset clears shift registers Gnd 8 Clock Serial clock input CBP 9 Serial Data Input Description 6 Truth Table Ground Latch enable On rising edge of pulse, shifts 5 most recent bits clocked in to set attenuation state 10 Gnd 11 Serial input Ground 12 Gnd Ground 13 Gnd Ground 14 VCC Fixed bias for SPI 15 Gnd Ground 16 Gnd Ground 17 RF2 RF input/output must be DC blocked 18 Gnd Ground 19 Gnd Ground input data 8 dB 4 dB 2 dB 1 dB 0.5 dB RF In/Out Attenuation 1 1 1 1 1 Insertion Loss 20 Gnd Ground Gnd Ground 1 1 1 1 1 1 0 0.5 dB 21 1 1 1 1 0 1 1 dB 22 Gnd Ground Gnd Ground Gnd Ground 1 1 1 0 1 1 2 dB 23 1 1 0 1 1 1 4 dB 24 1 0 1 1 1 1 8 dB 1 0 0 0 0 0 15.5 dB 0 X X X X X 15.5 dB VCC = 5 V “0” = 0–0.5 V “1” = 3.5–5 V “X” = Don’t Care Name 5 5k 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 µF. Reset Pin # 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 • [email protected] • 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 New Data Loaded Latched Data (Old) Data at Parallel Outputs tpd VCC = 5 V Parameter Symbol Min. Typ. VCC = 3 V Max. Min. Typ. Max. Unit Serial input setup time ts 5 5 ns Hold time from serial input to shift clock th 5 5 ns Setup time from shift clock to latch enable tlsup Propagation delay, latch enable to C0.5 through C8 40 tpd Setup time from reset to shift clock - Clock freq 100 30 20 fclk Clock Reset X X L Shift register cleared H Shift register clocked H Contents of shift register transferred to digital attenuator X ns 10 MHz 50 30 Latch Enable X ns 70 ns Function 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. Power-up sequence: 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-down sequence should be the reverse of above. 6 0. Connect ground 1. Apply VCC 2. Set all inputs (SCK, SDA, LE) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 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 • [email protected] • 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 Park Marking Pin 1 Indicator SK41092-1 REV1 ATTENUATOR TEST BOARD RF1 24 * C1 RF2 19 1 18 6 13 R1 C3 Skyworks P/N * C2 12 7 Pin 1 SMA SMA VCC LE SDI CLK SDO C1 = C2 = 47–300 pF. C3 = 0.01 µF. R1 = 5k W. ___ RST -362 4MM X 4MM QFN A Pin 24 A S2334 XXXX YWW Top View Lot # Date Code Y= Calender Year WW= Week Pin 24 Pin 1 Exposed Pad Bottom View 8 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 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 0.008 Ref. (0.20 mm) Seating Plane 0.157 (4 mm) -362 QFN 4 x 4 mm 24-Lead Suggested Land Pattern 1.60 (To Metal Pads) 0.02 mm + 0.03 mm 0.02 mm - 0.02 mm Pin 1 Indicator R0.20 0.157 (4 mm) 0.50 24X 0.25 0.035 (0.90 mm) ± 0.004 (0.10 mm) 4x Plated Thru Vias 0.106 (2.70 mm) + 0.004 (0.10 mm) 0.106 (2.70 mm) - 0.006 (0.15 mm) See Detail A Metal Gnd Pad (Sq.) 2.70 Exposed Pad See Detail A 0.106 (2.70 mm) + 0.004 (0.10 mm) 0.106 (2.70 mm) - 0.006 (0.15 mm) 0.098 (2.500 mm) 0.25 Exposed Soldering Area 0.60 Detail A Detail C Detail B 4 Places 0.098 (2.500 mm) R0.20 Recommended Solder Reflow Profiles Refer to the “Solder Reflow Information” Application Note, document number 200164. 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 Detail C 0.019 (0.5 mm) 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 • [email protected] • 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 © 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. 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