AAT2073B2 AAT2073B2 Preliminary Data Sheet 75Ω Digital Attenuator 2-Bit 9 dB DC~2700 MHz 1. Product Overview 1.1 General Description The AAT2073B2 is a GaAs MMIC two bit positive control digital attenuator. The device operates from DC to 2700 MHz with a control and supply voltage of +3 V or +5 V. The AAT2073B2 has LSB of 3 dB and a total attenuation of 9dB. The AAT2073B2 is composed of two cascade fixed attenuators. The states of attenuator are controlled by the logic level voltage. The attenuator bit values are 3 dB (LSB), 6 dB for a total attenuation of 9 dB. Attenuation accuracy is ±(0.15 dB + 3 % of attenuation setting) @ DC~1200 MHz. 1.2 Features 75 Ω Impedance Attenuation: 9 dB with 3 dB LSB Attenuation Accuracy: ± (0.15 dB + 3 % of Atten. setting) @DC~1200 MHz 1.3 Applications Telecommunication System CATV and FTTH AAT2073B2 Block Diagram (X-ray view) 1.4 Package Profile & RoHS Compliance UQFN-14L, 2.0x2.0 mm2, surface mount 1/11 ASB Inc. [email protected] RoHS-compliant June 2017 AAT2073B2 2. Summary on Product Performances 2.1 Electrical Specifications Supply voltage = +5 V, TA = +25 C, ZO = 75 Parameter Test Condition 50 MHz Reference 1200 MHz Insertion Loss (IL) 2000 MHz 2700 MHz DC – 1200 MHz Attenuation Accuracy 1) DC – 2700 MHz DC – 1200 MHz Return Loss DC – 2700 MHz Switching Characteristics: (10% to 90% RF) Rise/fall Time (50% Vctrl to RF) On/off Time 50 MHz 1200 MHz Input P1dB 2000 MHz 2700 MHz 50 MHz 1200 MHz IIP3 2) 2000 MHz 2700 MHz 50 MHz IIP2 2) 860 MHz Supply Voltage (Vs) High Control Voltage Low Current Min Typ Max Unit 0.3 0.7 dB 0.8 2.1 ±(0.15 dB + 3% of attenuation setting) ±(0.5 dB + 10% of attenuation setting) 15 16 dB 14 15 300 320 - +3 Vs-0.5 0 27 22 20 15 37 37 40 34 60 70 +5 Vs 600 ns - dBm - dBm dBm +0.5 V V uA 1) Attenuation accuracy are calculated at any bit or combination 2) IIP3 and IIP2 are measured with two tones at an input power of +0 dBm/tone separated by 6 MHz. 2.2 2/11 Truth Table State V1 V2 Insertion loss Low Low 3 dB High Low 6 dB Low High 9 dB High High ASB Inc. [email protected] June 2017 AAT2073B2 2.3 Pin Configuration Pin Description Simplified Outline 1, 2, 4, 6, 8, 10, 11 No connection 3 RF1, RF port 9 RF2, RF port 5, 7 RF GND 12 Vs, DC power supply voltage. V2, DC control voltage. Controls 6 dB attenuation state. V1, DC control voltage. Controls 3 dB attenuation state. 13 14 Note: Backside metal paddle is DC ground. 2.4 Absolute Maximum Ratings Parameters Max. Ratings Operation Case Temperature -40 to 85 C Storage Temperature -65 to 150 C Device Voltage +7 V +27 dBm @ 50 MHz +22 dBm @ 1200 MHz +15 dBm @ 2700 MHz Input RF Power 2.5 Moisture Sensitivity Level Level 3 at 260 °C reflow (Intentionally Blanked) 3/11 ASB Inc. [email protected] June 2017 AAT2073B2 3. Application: DC ~ 1200 MHz (Vs = +5 V, 75 Ω) 3.1 Application Circuit & Evaluation Board PCB Information Material FR4 Thickness (mm) 0.8 Size (mm) 25x50 EB No. EB-2x2-QFN14_ATT01 Bill of Material Symbol Value Size Description Manufacturer AAT2073B2 - - 2-Bit digital attenuator ASB C1, C4 1 F 0402 DC blocking capacitor Murata C2, C3 1 F 0402 Bypass capacitor Murata C5 0805 Decoupling capacitor Murata 10 F Note: Bypass capacitors (C2 and C3) should be close to the RF GND(pin 5 and pin 7). 4/11 ASB Inc. [email protected] June 2017 AAT2073B2 3.2 Plot of Performances Insertion loss Normalized attenuation all states Input return loss over all states 5/11 Output return loss over all states ASB Inc. [email protected] June 2017 AAT2073B2 IIP2 vs. Frequency over all states IIP3 vs. Frequency over all states Step error vs. frequency over all states Step error vs. frequency over all states 6/11 ASB Inc. [email protected] June 2017 AAT2073B2 4. Application: DC ~ 2700 MHz (Vs = +5 V, 75 Ω) 4.1 Application Circuit & Evaluation Board PCB Information Material FR4 Thickness (mm) 0.8 Size (mm) 25x50 EB No. EB-2x2-QFN14_ATT01 Bill of Material Symbol Value Size Description Manufacturer AAT2073B2 - - 2-Bit digital attenuator ASB C1, C4 1 F 0402 DC blocking capacitor Murata C2, C3 1 F 0402 Bypass capacitor Murata C5 0805 Decoupling capacitor Murata 10 F Note: Bypass capacitors (C2 and C3) should be close to the RF GND(pin 5 and pin 7). 7/11 ASB Inc. [email protected] June 2017 AAT2073B2 4.2 Plot of Performances Insertion loss 8/11 Normalized attenuation all states Input return loss over all states Output return loss over all states IIP3 vs. Frequency over all states Step error vs. frequency over all states ASB Inc. [email protected] June 2017 AAT2073B2 5. Package Outline (UQFN-14L, 2.0x2.0x0.4 mm3) Symbols A A1 A2 A3 b D E D1 E1 e1 e2 L R θ Burr Dimensions (In mm) MIN NOM 0.35 0.00 0.223 0.127REF 0.15 0.20 1.95 2.00 1.95 2.00 1.00BSC 1.00BSC 0.40BSC 0.45BSC 0.13 0.18 0.125BSC -12 0.00 0.03 MAX 0.40 0.05 0.273 0.25 2.03 2.03 0.23 0 0.06 6. Surface Mount Recommendation (In mm) NOTE 1. Recommended is that the ground via holes be placed on the bottom of the exposed pad of the device for better RF and thermal performance, as shown in the drawing at the left side 9/11 ASB Inc. [email protected] June 2017 AAT2073B2 7. Tape and Reel Information 7.1 10/11 UQFN-14L Package ASB Inc. [email protected] June 2017 AAT2073B2 8. Recommended Soldering Reflow Profile 260 C 20~40 sec Ramp-up (3 C/sec) Ramp-down (6 C/sec) 200 C 150 C 60~180 sec (End of Datasheet) Copyright 2017 ASB Inc. All rights reserved. Datasheet subject to change without notice. ASB assumes no responsibility for any errors which may appear in this datasheet. No part of the datasheet may be copied or reproduced in any form or by any means without the prior written consent of ASB. 11/11 ASB Inc. [email protected] June 2017