Surface Mount Digital Step Attenuator 75Ω 0 to 15.5 dB, 0.5 dB Step DAT-15575A Series 1MHz to 2.5 GHz The Big Deal • Wideband, operates up to 2.5 GHz • Glitchless attenuation transitions • High IP3, 52 dBm CASE STYLE: DG983-2 Product Overview The DAT-15575A+ series of 75Ω digital step attenuators provides adjustable attenuation from 0 to 15.5 dB in 0.5 dB steps. The control is a 5-bit serial/parallel interface, and the attenuators operate with either single positive or dual (positive and negative) supply voltage. DAT-15575A+ series models are produced by a unique CMOS process on silicon, offering the performance of GaAs with the advantages of conventional CMOS devices. Key Features Feature Advantages Wideband operation, specified from 1MHz to 2.5 GHz Can be used in multiple applications such as various versions of DOCSIS, satellite and defense, reducing part count. Serial or parallel interface Models available with serial or parallel interface mode to suit customer demand. Good VSWR, 1.3:1 typ. Eases interfacing with adjacent components and results in low amplitude ripple. Single positive supply models: (Model suffixes: -SP+ and –PP+) +2.3 to +3.6V+ Use of single positive supply simplifies power supply design. An internal negative voltage generator supplies the desired negative voltage. Single positive supply results in excellent spurious performance, -140 dBm typical. Dual supply models: (Model suffixes: -SN+ and –PN+) +2.7 to +3.6V (Positive) and -3.6 to -3.2V (Negative) Dual supply provides spurious-free operation. It also allows fast switching up to 1 MHz (vs. 25 kHz for single supply). Useable over a wide range of supply voltages, +2.3/2.7 to 5.2V Wide range fo positive operating voltages allows the DAT-15575A+ Series of models to be used in a wide range of applications. See Application Note AN-70-032 for operation above +3.6V Footprint compatible to DAT-15575-XX+ Series (XX=SN/SP/PN/PP) Can fit into existing footprint and provide wideband performance, to 2.5 GHz instead of 2.0 GHz. Glitchless Attenuation Transitions, 0.26 typical Compared to previous generation of digital attenuatiors which is a vast improvement. Notes A. Performance and quality attributes and conditions not expressly stated in this specification document are intended to be excluded and do not form a part of this specification document. B. Electrical specifications and performance data contained in this specification document are based on Mini-Circuit’s applicable established test performance criteria and measurement instructions. C. The parts covered by this specification document are subject to Mini-Circuits standard limited warranty and terms and conditions (collectively, “Standard Terms”); Purchasers of this part are entitled to the rights and benefits contained therein. For a full statement of the Standard Terms and the exclusive rights and remedies thereunder, please visit Mini-Circuits’ website at www.minicircuits.com/MCLStore/terms.jsp Mini-Circuits ® www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 [email protected] Page 1 of 8 Digital Step Attenuator 75W 1-2500 MHz 15.5 dB, 0.5 dB Step 5 Bit, Serial Control Interface, Dual Supply Voltages Product Features • Dual Supply (Positive & Negative) Voltages • Immune to latch up • Glitchless attenuation transitions • Excellent accuracy, 0.1 dB Typ • Serial control interface • Low Insertion Loss • High IP3, +55-69 dBm • Excellent return loss, 18 dB typ. • Very low DC power consumption • Small size 4.0 x 4.0 mm DAT-15575A-SN+ CASE STYLE: DG983-2 +RoHS Compliant The +Suffix identifies RoHS Compliance. See our web site for RoHS Compliance methodologies and qualifications Typical Applications • DOCSIS 3.1 • Portable Wireless • Fiber CPE and infrastructure • MMDS & Wireless LAN • Satellite CPE and infrastructure • UNII & Hiper LAN • Power amplifier distortion canceling loop General Description The DAT-15575A-SN+ is a 75W RF digital step attenuator that offers an attenuation range up to 15.5 dB in 0.5 dB steps. The control is a 5-bit serial interface, operating on dual (positive and negative) supply voltages. The DAT-15575A-SN+ is produced using a unique CMOS process on silicon, offering the performance of GaAs, with the advantages of conventional CMOS devices. Simplified Schematic RF Input 8dB 4dB 2dB 1dB 0.5dB RF Out Digital Serial Control Notes A. Performance and quality attributes and conditions not expressly stated in this specification document are intended to be excluded and do not form a part of this specification document. B. Electrical specifications and performance data contained in this specification document are based on Mini-Circuit’s applicable established test performance criteria and measurement instructions. C. The parts covered by this specification document are subject to Mini-Circuits standard limited warranty and terms and conditions (collectively, “Standard Terms”); Purchasers of this part are entitled to the rights and benefits contained therein. For a full statement of the Standard Terms and the exclusive rights and remedies thereunder, please visit Mini-Circuits’ website at www.minicircuits.com/MCLStore/terms.jsp Mini-Circuits ® www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 [email protected] REV. OR M155582 DAT-15575A-SN+ RS/CP 160908 Page 2 of 8 DAT-15575A-SN+ Digital Step Attenuator RF Electrical Specifications, 1-2500 MHz, TAMB=25°C, VDD=+3V, VSS=-3.2V, 75Ω Freq. Range (GHz) Min. Typ. Max. 0.001-1.2 — 0.03 0.17 1.2-2.0 — 0.05 0.18 2.0-2.5 — 0.1 0.19 0.001-1.2 — 0.03 0.18 1.2-2.0 — 0.1 0.20 2.0-2.5 — 0.1 0.23 0.001-1.2 — 0.07 0.21 1.2-2.0 — 0.15 0.26 2.0-2.5 — 0.15 0.31 0.001-1.2 — 0.05 0.27 1.2-2.0 — 0.15 0.36 2.0-2.5 — 0.2 0.47 0.001-1.2 — 0.1 0.39 1.2-2.0 — 0.24 0.60 2.0-2.5 — 0.35 0.79 0.001-1.2 — 1.2 1.8 1.2-2.5 — 1.6 1.9 0.001-1.2 — 1.3 — 1.2-2.5 — 1.4 — Input IP3 (at Min. and Max. Attenuation) .005-2.5 — 55-69 — Input IP2 .005-2.5 Input Power @ 0.2dB Compression (at Min. and Max. Attenuation) 0.030-2.5 — +30 — 1 MHz to 30 MHz — — See Fig. 2 >30 MHz — — +24 — — 25 — Parameter Accuracy @ 0.5 dB Attenuation Setting Accuracy @ 1 dB Attenuation Setting Accuracy @ 2 dB Attenuation Setting Accuracy @ 4 dB Attenuation Setting Accuracy @ 8 dB Attenuation Setting Insertion Loss1 @ all attenuator set to 0dB VSWR Input Operating Power Thermal Resistance (Junction to case) Typ. Max. Units Vdd, Supply Voltage 2.7 3 3.62 V Idd Supply Current — — 80 Control Input Low -0.3 — 0.63 Vss, Supply Voltage -3.6 — -3.2 V Iss, Supply Current -40 — — µA Control Input High 1.17 — 3.6 V — — 20 µA Absolute Maximum Ratings -40°C to 105°C -65°C to 150°C Vdd -0.3V Min., 5.5V Max. Vss -3.8V Min. Voltage on any input 1-30 MHz dB dB :1 dBm dBm dBm °C/W Min. Typ. Max. Units µA — 0.4 0.7 µSec V Switching Control Frequency — 1.0 — MHz 120 100 -0.3V Min., 3.6V Max. IIP2 (dBm) Ratings Storage Temperature dB Switching Speed, 50% Control to 0.5dB of Attenuation Value 4 Operating Temperature dB dBm Parameter 1. I. Loss values are de-embedded from test board Loss (test board’s Insertion Loss: 0.10dB @100MHz, 0.40dB @1200MHz, 0.55dB @2000MHz, 0.75dB @4000MHz). 2. For operation above +3.6V see application note, AN-70-032 3. 0V during power-up. Parameter dB Switching Specifications Min. Control Current dB See Fig. 1 DC Electrical Specifications Parameter Units 80 0 dB 60 31.5 dB 40 20 0 5 50 500 5000 Frequency (MHz) Figure 2 Notes Input Power A. Performance and quality attributes30-2500MHz and conditions not expressly stated in this+30dBm specification document are intended to be excluded and do not form a part of this specification document. Figure 1. test IP2performance vs. frequency attenuation instructions. B. Electrical specifications and performance data contained in this specification document are based on Mini-Circuit’s applicable established criteriaand and measurement 4.covered Permanent damage may occur if anyare of these are exceeded. C. The parts by this specification document subjectlimits to Mini-Circuits standard limited warranty and terms and conditions (collectively, “Standard Terms”); Purchasers of this part are entitled to the rights and benefitsbetween containedmax therein. For a fulland statement of themax Standard exclusive rights andreliability. remedies thereunder, please visit Mini-Circuits’ website at www.minicircuits.com/MCLStore/terms.jsp 5. Operation operating absolute inputTerms powerand willthe result in reduced Mini-Circuits ® www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 [email protected] Page 3 of 8 DAT-15575A-SN+ Digital Step Attenuator 5 20 C0.5 1 Latch Enable Input (Note 2) RFin 2 VDD 6 Power Supply Data 3 N/C 7 Not connected (Note 7) Clock 4 N/C 8 Not connected LE 5 VDD 9 Power Supply GND 10 Ground connection GND 11 Ground connection VSS 12 Negative Supply Voltage VDD 13 Power Supply RF out 14 RF out port (Note 1) C8 15 Control for attenuation bit, 8 dB (Note 4) C4 16 Control for attenuation bit, 4 dB (Note 4) C2 17 Control for attenuation bit, 2 dB (Note 4) GND 18 Ground Connection C1 19 Control for attenuation bit, 1 dB (Note 4) C0.5 20 Control for attenuation bit, 0.5 dB (Note 4, 7) GND Paddle 16 C4 LE N/C 2x2mm Paddle ground 15 C8 14 RFout 13 VDD 12 VSS 11 GND GND 10 Serial Interface clock input 17 C2 4 9 Serial Interface data input (Note 3) Clock VDD RF in port (Note 1) 3 18 GND 2 Data 8 RF in 7 Not connected (Note 8) N/C 1 N/C N/C Description 6 Pin Number VDD Function 19 C1 Pin Configuration (Top View) Pin Description Device Marking Pin 1 Index MCL DS75 Paddle ground (Note 5) Notes: 1. Both RF ports must be held at 0VDC or DC blocked with an external series capacitor. RF in and RF out are interchageable. 2. Latch Enable (LE) has an internal 2MΩ pull-up resistor to VDD. 3. Place a 10KΩ resistor in series to be compattible with previous generation of models. 10KΩ can be omiited in new designs. 4. Refer to Power-up Control Settings. 5. The exposed solder pad on the bottom of the package (See Pin configuration) must be grounded for proper device operation. 6. N/A 7. This pin has internal 1MΩ short resistor to ground. Input Power (dBm) 8. Place 10KΩ resistor to ground externally. 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 Absolute Max Power Max Operating-Pulsed (>= 30 MHz) Max Operating -CW & Pulsed (< 30 MHz) Max Operating-CW (≥ 30 MHz) 1.0 10.0 100.0 Frequency (MHz) 1000.0 Notes A. Performance and quality attributes and conditions not expressly stated in this specification document are intended to be excluded and do not form a part of this specification document. B. Electrical specifications and performance data contained in this specification document are based on Mini-Circuit’s applicable established test performance criteria and measurement instructions. Figure document 2. Max Input power frequency. C. The parts covered by this specification are subject to vs. Mini-Circuits standard limited warranty and terms and conditions (collectively, “Standard Terms”); Purchasers of this part are entitled Pulsed 5% duty 4620 µS and period to the rights and benefits contained therein. Power: For a full statement of cycle, the Standard Terms the exclusive rights and remedies thereunder, please visit Mini-Circuits’ website at www.minicircuits.com/MCLStore/terms.jsp Mini-Circuits ® www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 [email protected] Page 4 of 8 DAT-15575A-SN+ Digital Step Attenuator Simplified Schematic RF Input 8dB 4dB 2dB 1dB RF Out 0.5dB Digital Serial Control The DAT-15575A-SN+ Serial interface consists of 5 control bits that select the desired attenuation state, as shown in Table 1: Truth Table Table 1. Truth Table Attenuation State C8 C4 C2 C1 C0.5 Reference 0 0 0 0 0 0.5 (dB) 0 0 0 0 1 1 (dB) 0 0 0 1 0 2 (dB) 0 0 1 0 0 4 (dB) 0 1 0 0 0 8 (dB) 1 0 0 0 0 15.5 (dB) 1 1 1 1 1 Note: Not all 32 possible combinations of C0.5 - C8 are shown in table The serial interface is a 5-bit serial in, parallel-out shift register buffered by a transparent latch. It is controlled by three CMOS-compatible signals: Data, Clock, and Latch Enable (LE). The Data and Clock inputs allow data to be serially entered into the shift register, a process that is independent of the state of the LE input. The LE input controls the latch. When LE is HIGH, the latch is transparent and the contents of the serial shift register control the attenuator. When LE is brought LOW, data in the shift register is latched. The shift register should be loaded while LE is held LOW to prevent the attenuator value from changing as data is entered. The LE input should then be toggled HIGH and brought LOW again, latching the new data. The timing for this operation is defined by Figure 3 (Serial Interface Timing Diagram) and Table 2 (Serial Interface AC Characteristics). Table 2. Serial Interface AC Characteristics Figure 3: Serial Interface Timing Diagram Symbol Parameter fclk LE Clock Data MSB tSDSUP tSDHLD LSB tLESUP tLEPW Min. Serial data clock frequency (Note 1) Max. Units 10 MHz tclkH Serial clock HIGH time 30 ns tclkL Serial clock LOW time 30 ns tLESUP LE set-up time after last clock falling edge 10 ns tLEPW LE minimum pulse width 30 ns Serial data set-up time before clock rising edge 10 ns tSDSUP Serial data hold time 10 ns after clock falling edge Note 1. fclk verified during the functional pattern test. Serial programming sections of the functional pattern are clocked at 10MHz to verify fclk specification. tSDHLD Notes A. Performance and quality attributes and conditions not expressly stated in this specification document are intended to be excluded and do not form a part of this specification document. B. Electrical specifications and performance data contained in this specification document are based on Mini-Circuit’s applicable established test performance criteria and measurement instructions. C. The parts covered by this specification document are subject to Mini-Circuits standard limited warranty and terms and conditions (collectively, “Standard Terms”); Purchasers of this part are entitled to the rights and benefits contained therein. For a full statement of the Standard Terms and the exclusive rights and remedies thereunder, please visit Mini-Circuits’ website at www.minicircuits.com/MCLStore/terms.jsp Mini-Circuits ® www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 [email protected] Page 5 of 8 DAT-15575A-SN+ Digital Step Attenuator The DAT-15575A-SN+, uses a common 5-bit serial word format, as shown in Table 3: 5-Bit attenuator Serial Programming Register Map. The bit B4, corresponds to the 8-dB Step and the last bit, the LSB, corresponds to the 0.5 dB step. Table 3. 6-Bit attenuator Serial Programming Register Map B5 B4 B3 B2 B1 B0 0 C8 C4 C2 C1 C0.5 MSB (first in) LSB (last in) Power-up Control Settings The DAT-15575A-SN+ always assumes a specifiable attenuation setting on power-up, allowing a known attenuation state to be established before an initial serial control word is provided. When the attenuator powers up, the five control bits are set to whatever data is present on the six data inputs (C0.5 to C8). This allows any one of the 32 attenuation settings to be specified as the power-up state. Notes A. Performance and quality attributes and conditions not expressly stated in this specification document are intended to be excluded and do not form a part of this specification document. B. Electrical specifications and performance data contained in this specification document are based on Mini-Circuit’s applicable established test performance criteria and measurement instructions. C. The parts covered by this specification document are subject to Mini-Circuits standard limited warranty and terms and conditions (collectively, “Standard Terms”); Purchasers of this part are entitled to the rights and benefits contained therein. For a full statement of the Standard Terms and the exclusive rights and remedies thereunder, please visit Mini-Circuits’ website at www.minicircuits.com/MCLStore/terms.jsp Mini-Circuits ® www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 [email protected] Page 6 of 8 DAT-15575A-SN+ Digital Step Attenuator TB-343 Evaluation Board Schematic Diagram see Note 1 see Note 1 Note 1: Both RF ports must be held at 0VDC or DC blocked with an external series capacitor. TB-343 Bill of Materials N1-N6, N11, N12, N15, N18 Resistor 0603 10 KOhm +/- 1% N10, N16, N17, N20 NPO Capacitor 0603 100pF +/- 5% N21 Tantalum Capacitor 0805 100nF +/- 10% N19 Hex Invert Schmitt Trigger MSL1 **N12 can be reduced to 0 Ohms Notes A. Performance and quality attributes and conditions not expressly stated in this specification document are intended to be excluded and do not form a part of this specification document. B. Electrical specifications and performance data contained in this specification document are based on Mini-Circuit’s applicable established test performance criteria and measurement instructions. C. The parts covered by this specification document are subject to Mini-Circuits standard limited warranty and terms and conditions (collectively, “Standard Terms”); Purchasers of this part are entitled to the rights and benefits contained therein. For a full statement of the Standard Terms and the exclusive rights and remedies thereunder, please visit Mini-Circuits’ website at www.minicircuits.com/MCLStore/terms.jsp Mini-Circuits ® www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 [email protected] Page 7 of 8 DAT-15575A-SN+ Digital Step Attenuator Additional Detailed Technical Information additional information is available on our dash board. To access this information click here Data Table Performance Data Swept Graphs S-Parameter (S2P Files) Data Set (.zip file) Case Style DG983-2 Plastic package, exposed paddle, lead finish: NiPdAu Tape & Reel F87 Standard quantities available on reel 7” reels with 20, 50, 100 or 200 devices 13” reels with 3K devices Suggested Layout for PCB Design PL-202 Evaluation Board TB-343 Environmental Ratings ENV33T1 ESD Rating Human Body Model (HBM): Class 1C (1000 to <2000V) in accordance with MIL-STD-883 method 3015 (pass 1500V). Charge Device Model (CDM): Class C3 (>1000V) per JESD22-C101F MSL Rating Moisture Sensitivity: MSL1 in accordance with IPC/JEDEC J-STD-020D MSL Test Flow Chart Start Visual Inspection Electrical Test SAM Analysis Reflow 3 cycles, 260°C Soak 85°C/85RH 168 hours Bake at 125°C, 24 hours Visual Inspection Electrical Test SAM Analysis Finish Additional Notes A. Performance and quality attributes and conditions not expressly stated in this specification document are intended to be excluded and do not form a part of this specification document. B. Electrical specifications and performance data contained in this specification document are based on Mini-Circuit’s applicable established test performance criteria and measurement instructions. C. The parts covered by this specification document are subject to Mini-Circuits standard limited warranty and terms and conditions (collectively, “Standard Terms”); Purchasers of this part are entitled to the rights and benefits contained therein. For a full statement of the Standard Terms and the exclusive rights and remedies thereunder, please visit Mini-Circuits’ website at www.minicircuits.com/MCLStore/terms.jsp Notes A. Performance and quality attributes and conditions not expressly stated in this specification document are intended to be excluded and do not form a part of this specification document. B. Electrical specifications and performance data contained in this specification document are based on Mini-Circuit’s applicable established test performance criteria and measurement instructions. C. The parts covered by this specification document are subject to Mini-Circuits standard limited warranty and terms and conditions (collectively, “Standard Terms”); Purchasers of this part are entitled to the rights and benefits contained therein. For a full statement of the Standard Terms and the exclusive rights and remedies thereunder, please visit Mini-Circuits’ website at www.minicircuits.com/MCLStore/terms.jsp Mini-Circuits ® www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 [email protected] Page 8 of 8