RFSA3523 RFSA3523 RFSA3523 5MHz to 6000MHz, Digital Step Attenuator VDD A0 A2 A1 SI CLK The RFMD’s RFSA3523 is a 5-bit digital step attenuator (DSA) that features high linearity over the entire 15.5dB gain control range with 0.5dB steps. The RFSA3523 uses serial control interface. The RFSA3523 has a low insertion loss of 1.4dB at 2GHz. Patent pending circuit architecture provides overshoot-free transient switching performance. External address pins allow up to eight DSAs to be controlled on a single bus. The RFSA3523 is available in a 3mm x 3mm QFN package. 16 15 14 13 1 12 LE 11 GND LOGIC CONTROL 2 GND 3 RFIN 4 10 GND 9 RFOUT 5-BIT DSA Package: QFN, 16-Pin, 3.0mm x 3.0mm x 0.85mm Features ■ 5-Bit, 15.5dB Range, 0.5dB Step ■ Patent Pending Circuit Architecture ■ Overshoot-free Transient Switching Performance ■ Frequency Range 5MHz to 6000MHz ■ High Linearity, IIP3 >55dBm ■ Serial Control Interface ■ Fast Switching Speed, <120nsec Typical ■ Serial Addressable Supports Up to Eight Addresses ■ Single Supply 3V to 5V Operation ■ RF Pins Have No DC Voltage, Can be DC Grounded Externally ■ Power-up Default Setting Is Maximum Attenuation Applications 8 GND 7 GND GND 6 GND 5 Functional Block Diagram ■ 2G through 4G Base Stations ■ Point-to-Point ■ WiMax/WiFi ■ Test Equipment Ordering Information RFSA3523SQ Sample bag with 25 pieces RFSA3523SR 7" Reel with 100 pieces RFSA3523TR7 7" Reel with 2500 pieces RFSA3523PCK-410 5MHz to 6000MHz PCBA with 5-piece sample bag RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. ® DS150128 ® RF MICRO DEVICES and RFMD are trademarks of RFMD, LLC. BLUETOOTH is a trademark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks, and registered trademarks are the property of their respective owners. ©2013, RF Micro Devices, Inc. 1 of 16 RFSA3523 Absolute Maximum Ratings Parameter Rating Unit Supply Voltage (VDD) -0.5 to +6.0 V All Other DC and Logic Pins (Supply Voltage Must Be Applied Prior to Any Other Pin Voltages) -0.5 to VDD V Maximum Input Power at RFIN Pin at 85°C Case Temperature +30 dBm Maximum Input Power at RFOUT Pin at 85°C Case Temperature +27 dBm Storage Temperature Range -40 to +150 °C ESD Rating - Human Body Model (HBM) 1000 V Moisture Sensitivity Level MSL1 Caution! ESD sensitive device. RFMD Green: RoHS status based on EU Directive 2011/65/EU (at time of this document revision), halogen free per IEC 61249-2-21, < 1000ppm each of antimony trioxide in polymeric materials and red phosphorus as a flame retardant, and <2% antimony in solder. Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Absolute Maximum Rating conditions is not implied. Recommended Operating Condition Specification Parameter Min Operating Temperature Range (RF Input power handling de-rates above 85°C) -40 Operating Junction Temperature Supply Voltage 2.7 Typ Max Unit +105 °C 125 °C 5.5 V Nominal Operating Parameters Specification Parameter Unit Min Typ Condition Max General Performance Supply Current Thermal Resistance 180 µA 55 °C/W RF Input Power at RFIN Pin 27 dBm RF Input Power at RFOUT Pin 20 dBm 6000 MHz Steady state operation, current draw during attenuation state transitions is higher. At maximum attenuation state with RF power applied to the RFIN pin. Continuous operation at +85°C case temperature RF Performance Frequency Range 5 Insertion Loss 1.4 dB 2000MHz, 0dB attenuation Attenuation Range 15.5 dB 0.5dB step size ±(0.2 + 4%) dB Input IP3 55 dBm Input P0.1dB 30 dBm Return Loss 15 dB Input and Output Impedance 50 Ω Absolute Attenuation Error RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. ® DS150128 ® RF MICRO DEVICES and RFMD are trademarks of RFMD, LLC. BLUETOOTH is a trademark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks, and registered trademarks are the property of their respective owners. ©2013, RF Micro Devices, Inc. 2 of 16 RFSA3523 Specification Parameter Unit Min Typ Condition Max RF Performance – Continued Switching Speed Successive Step Phase Delta 120 nsec 50% control to 10%/90% RF 2 Deg 2000MHz Control Digital Logic Low Digital Logic High 0.63 1.17 V V Note: Typical performance at these conditions: Temp = +25°C, 2000MHz, 5V Supply Voltage RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. DS150128 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 3 of 16 RFSA3523 Typical Application Schematic RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. DS150128 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 4 of 16 RFSA3523 Typical Performance: RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. DS150128 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 5 of 16 RFSA3523 Typical Performance: Note: Attenuator remains monotonic if step error is less than +0.5dB. RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. DS150128 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 6 of 16 RFSA3523 Typical Performance: RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. DS150128 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 7 of 16 RFSA3523 Typical Performance: RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. DS150128 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 8 of 16 RFSA3523 Evaluation Board Schematic RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. DS150128 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 9 of 16 RFSA3523 Evaluation Board Bill of Materials (BOM) Description Reference Designator RFSA3613-410 Manufacturer Manufacturer's P/N Dynamic Details (DDI) Toronto RFSA3613-410(B) Digital Step Attenuator, 5MHz to 6000MHz U1 RFMD RFSA3523SB CAP, 1µF, 10%, 25V, X7R, 1206 C1 Taiyo Yuden (USA), Inc. CE TMK316BJ105KL-T J1-J4 Molex SD-73251-4000 CONN, HDR, ST, PLRZD, 2-PIN, 0.100” P1 ITW Pancon MPSS100-2-C CONN, HDR, ST, 3 x 5, 0.100”, T/H P3 Samtec Inc. TSW-105-07-L-T CONN, HDR, 2 x 4, RA, 0.100”, T/H P4 Samtec Inc. TSW-104-08-G-D-RA CONN, SKT, 24-PIN DIP, 0.600”, T/H P2 Aries Electronics Inc. 24-6518-10 M1 (See Note 1) Future Technology Devices Int’l UM232R C4 Murata Electronics GRM1555C1H471JA01D S1-S4 (See Note 2) 3M Interconnect Solutions 929950-00 C5-C13 N/A N/A CONN, SMA, END LNCH, UNIV, HYB MNT, FLT MOD, USB TO SERIAL UART, SSOP-28 CAP, 470pF, 5%, 50V, C0G, 0402 Jumpers, 2-Pin DNP Notes: 1. 2. M1 should be mounted into P2 with respect to the Pin 1 alignment of M1 andP2. Install S1-S4 into P3 as indicated on Evaluation Board Assembly Diagram RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. DS150128 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 10 of 16 RFSA3523 Evaluation Board Assembly Drawing RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. DS150128 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 11 of 16 RFSA3523 Evaluation Board Jumper Programming Jumpers Connector Signal Logic Voltage S1 S2 Position U1 Connection 0 VDD (From P1) 1 VIO (From P4) 0 GND 1 U1_VDD 0 GND 1 U1_VDD 0 GND 1 U1_VDD AO Comment External Address P3 S3 S4 A1 External Address A2 External Address Note: Default jumper settings are BOLD. Evaluation Board Programming Using USB Interface Serial Addressable Mode All programming jumpers on the evaluation board are set to the default values indicated in the table. Refer to the Control Bit Generator (CBG) Software Reference Manual for detailed instructions on how to setup the software for use. Apply the supply voltage to P1. Select ‘RFSA3523’ from the RFMD Parts List of the CBG user interface. Set the attenuation value using the CBG user interface. The attenuator is set to the desired state and measurements can be taken. Note that the external address bits must all be set to ‘0’ when using the USB interface as the CBG software does not have the capability to set the external address in the serial data stream at this time. Evaluation Board Programming Using External Bus Serial Addressable Mode This configuration allows the user to control the attenuator through the P4 connector using an external harness. Remove the USB interface board if it is currently installed on the evaluation board. Connect a user-supplied harness to the P4 connector. Note that the top row of P4 contains the serial bus signals and the bottom row is ground. Programming jumper S1 is set to ‘0’. External address jumpers S2 through S4 can be set to any value desired by the user. Apply the supply voltage to P1. Send the appropriate signals onto the serial bus lines in accordance with the Serial Addressable Mode Timing Diagram. The attenuator is set to the desired state and measurements can be taken. Default Power-up State This default attenuation state is maximum (15.5dB) when supply voltage is applied to the attenuator. The LE signal must be held to logic ‘0’ during power-up. RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. DS150128 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 12 of 16 RFSA3523 Pin Names and Descriptions Pin Name Description 1 VDD 2 A0 3 GND Ground Pin 4 RFIN RF Input Pin Incident RF power must enter this pin for rated thermal performance and reliability Do not apply DC power to this pin. Pin may be DC grounded externally and is grounded thru resistors internal to the part. 5 GND Ground Pin 6 GND Ground Pin 7 GND Ground Pin 8 GND Ground Pin 9 RFOUT 10 GND Ground Pin 11 GND Ground Pin 12 LE 13 CLK Serial Clock Input 14 SI Serial data Input 15 A1 A1 External Address Pin 16 A2 A2 External Address Pin Supply Voltage A0 External Address Pin RF Output Pin; Do not apply DC power to this pin. Pin may be DC grounded externally and is grounded thru resistors internal to the part. Latch Enable The leading edge of signal on LE causes the attenuator to change state Serial Addressable Mode Attenuation Word Truth Table Attenuation Word Attenuation State D7 D6 D5 D4 D3 D2 D1 (LSB) D0 X X L L L L L X 0dB / Reference Insertion Loss X X L L L L H X 0.5dB X X L L L H L X 1dB X X L L H L L X 2dB X X L H L L L X 4dB X X H L L L L X 8dB X X H H H H H X 15.5dB RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. DS150128 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 13 of 16 RFSA3523 Serial Addressable Mode Address Word Truth Table Address Word Address Setting A7 A6 A5 A4 A3 A2 (MSB) A1 A0 X X X X X L L L 000 X X X X X L L H 001 X X X X X L H L 010 X X X X X L H H 011 X X X X X H L L 100 X X X X X H L H 101 X X X X X H H L 110 X X X X X H H H 111 Serial Addressable Mode Timing Diagram A[2:0] X X VALID A[2:0] External Address Setting LE CLK SI X D0 D1 D2 D3 D4 D5 D6 D7 A0 A1 A2 A3 A4 A5 A6 A7 X Note: Bits D0, D6, D7, A3-A7 are not used and can be set to logic high or low RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. DS150128 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 14 of 16 RFSA3523 Serial Bus Timing Specifications Parameter Limit Unit Comment t1 25 MHz max CLK Frequency t2 20 ns min CLK High t3 20 ns min CLK Low t4 5 ns min SI to CLK Setup Time t5 5 ns min SI to CLK Hold Time t6 30 ns min SI Valid t7 5 ns min LE to CLK Setup Time t8 5 ns min CLK to LE Setup Time t9 10 ns min LE Pulse Width RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. DS150128 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 15 of 16 RFSA3523 Package Drawing (Dimensions in millimeters) Branding Diagram RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical support, contact RFMD at +1.336.678.5570 or [email protected]. DS150128 The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 16 of 16