AT90-1283 Digital Attenuator 15.5 dB, 5-Bit, TTL Driver, DC-3.5 GHz Rev. V11 Schematic with Off-Chip Components Features • • • • • • • • Attenuation: 0.5 dB Steps to 15.5 dB Single Positive Supply Contains Internal DC to DC Converter Low DC Power Consumption Small Footprint, JEDEC Package Integral TTL Driver 50 ohm Impedance CSP-1 Package Description M/A-COM's AT90-1283 is a GaAs FET 5-bit digital attenuator with integral TTL driver. Step size is 0.5 dB providing a 15.5 dB total attenuation range. This device is in an PQFN plastic surface mount package. The AT90-1283 is ideally suited for use where accuracy, fast speed, very low power consumption and low costs are required. For dual supply designs without switching noise, use AT900283. Ordering Information Part Number Package AT90-1283 Bulk Packaging AT90-1283TR 1000 piece reel AT90-1283-TB Sample Test Board Note: Reference Application Note M513 for reel size information. Pin Configuration3 Pin No. Function Pin No. Function 1 GND 17 NC 2 C8 18 NC 3 C4 19 Vcc 4 C2 20 NC 5 C1 21 Cp 6 C0.5 22 NC 7 GND 23 Cp 8 NC 24 NC 9 NC 25 VEE2 10 NC1 26 GND 11 GND 27 RF2 12 RF1 28 GND 13 GND 29 NC1 14 NC 30 VEE2 15 NC 31 NC 16 NC 32 Vcc 1. Pins 10 and 29 must be isolated. 2. VEE is produced internally and requires a .1 µF cap to GND. Generated noise is typical of switching DC-DC Converters. 3. The exposed pad centered on the package bottom must be connected to RF and DC ground. (For PQFN Packages) 1 ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions • North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400 is considering for development. Performance is based on target specifications, simulated results, • India Tel: +91.80.4155721 • China Tel: +86.21.2407.1588 and/or prototype measurements. Commitment to develop is not guaranteed. Visit www.macomtech.com for additional data sheets and product information. PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Solutions has under development. Performance is based on engineering tests. Specifications are typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make Commitment to produce in volume is not guaranteed. changes to the product(s) or information contained herein without notice. AT90-1283 Digital Attenuator 15.5 dB, 5-Bit, TTL Driver, DC-3.5 GHz Rev. V11 Electrical Specifications: TA = +25°C Parameter Test Conditions Frequency Units Min Typ Max Insertion Loss — DC - 3.5 GHz dB — 2.8 3.2 Attenuation Accuracy Individual Bits 0.5-1-4-8 dB Individual Bit 2 dB Any Combination of Bits 1 to 15.5 dB DC - 3.5 GHz DC - 3.5 GHz DC - 3.5 GHz dB dB dB — — — — — — ±(.3 +5% of atten setting) ±(.4 +10% of atten setting) ±(.5 +7% of atten setting) VSWR Full Range DC - 3.5 GHz Ratio — 1.6:1 1.8:1 Switching Speed 50% Cntl to 90%/10% RF 10% to 90% or 90% to 10% — — ns ns — — 75 20 150 50 1 dB Compression — — 50 MHz 0.5 - 3.5 GHz dBm dBm — — +21 +29 — — Input IP3 Two-tone inputs up to +5 dBm 50 MHz 0.5-3.5 GHz dB dB — — +35 +48 — — Vcc — — V 4.75 5.0 5.25 VIL VIH LOW-level input voltage HIGH-level input voltage — — V V 0.0 2.0 — — 0.8 5.0 lin (Input Leakage Current) Vin = VCC or GND — uA -1.0 — 1.0 Vcc min to max, Logic “0” or “1” — mA — 6 10 For guaranteed start-up — mA — — 125 ΔIcc (Additional Supply Current Per TTL Input Pin) VCC = Max, Vcntrl = VCC - 2.1 V — mA — — 1.0 Switching Noise Generated from DC-DC Converter with recommended capacitors 3.5 MHz dBm — -93 — Thermal Resistance θjc — — °C/W — 15 — Icc 4 Turn-on Current 4. 5. 5 During turn-on, the device requires an initial start up current (Icc) specified as “Turn-on Current”. Once operational, Icc will drop to the specified levels. The DC-DC converter is guaranteed to start in 100 µs as long as the power supplies have the maximum turn-on current available for start-up. Absolute Maximum Ratings 6,7 Parameter Absolute Maximum Max. Input Power 0.05 GHz 0.5 - 3.5 GHz +27 dBm +34 dBm VCC -0.5V ≤ VCC ≤ +6.0V Vin 6. 7. 8. 8 -0.5V ≤ Vin ≤ VCC + 0.5V Operating Temperature -40ºC to +85ºC Storage Temperature -65ºC to +125ºC Exceeding any one or combination of these limits may cause permanent damage to this device. M/A-COM does not recommend sustained operation near these survivability limits. Standard CMOS TTL interface, latch-up will occur if logic signal is applied prior to power supply. Handling Procedures Please observe the following precautions to avoid damage: Static Sensitivity Gallium Arsenide Integrated Circuits are sensitive to electrostatic discharge (ESD) and can be damaged by static electricity. Proper ESD control techniques should be used when handling these devices. Moisture Sensitivity The MSL rating for this part is defined as Level 2 per IPC/JEDEC J-STD-020. Parts shall be stored and/or baked as required for MSL Level 2 parts. 2 ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions • North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400 is considering for development. Performance is based on target specifications, simulated results, • India Tel: +91.80.4155721 • China Tel: +86.21.2407.1588 and/or prototype measurements. Commitment to develop is not guaranteed. Visit www.macomtech.com for additional data sheets and product information. PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Solutions has under development. Performance is based on engineering tests. Specifications are typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make Commitment to produce in volume is not guaranteed. changes to the product(s) or information contained herein without notice. AT90-1283 Digital Attenuator 15.5 dB, 5-Bit, TTL Driver, DC-3.5 GHz Rev. V11 Recommended PCB Configuration9 Truth Table (Digital Attenuator) C8 C4 C2 C1 C0.5 Attenuation 0 0 0 0 0 Loss, Reference 0 0 0 0 1 0.5 dB 0 0 0 1 0 1.0 dB 0 0 1 0 0 2.0 dB 0 1 0 0 0 4.0 dB 1 0 0 0 0 8.0 dB 1 1 1 1 1 15.5 dB 0 = TTL Low; 1 = TTL High 9. Application Note C2083 is available on line at www.macom.com Typical Performance Curves Insertion Loss VSWR @ Insertion Loss 3.0 Inp ut O ut p ut 1.75 VSWR Ratio Loss (dB) 2.5 2.0 1.5 1.50 1.25 1.0 0 500 1000 1500 2000 2500 Fre que ncy (MHz ) 3000 3500 1.00 0 500 1000 1500 2000 2500 3000 3500 Fre que ncy (MHz ) 3 ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions • North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400 is considering for development. Performance is based on target specifications, simulated results, • India Tel: +91.80.4155721 • China Tel: +86.21.2407.1588 and/or prototype measurements. Commitment to develop is not guaranteed. Visit www.macomtech.com for additional data sheets and product information. PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Solutions has under development. Performance is based on engineering tests. Specifications are typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make Commitment to produce in volume is not guaranteed. changes to the product(s) or information contained herein without notice. AT90-1283 Digital Attenuator 15.5 dB, 5-Bit, TTL Driver, DC-3.5 GHz Rev. V11 Typical Performance Curves Attenuation Error, 1 dB Bit Attenuation Error, 0.5 dB Bit 1.0 1.0 0.5 Error (dB) Error (dB) 0.5 0.0 -0.5 0.0 -0.5 -1.0 0 500 1000 1500 2000 2500 3000 3500 -1.0 0 Fre que ncy (MHz ) 500 1000 1500 2000 2500 3000 3500 Fre que ncy (MHz ) Attenuation Error, 2 dB Bit Attenuation Error, 4 dB Bit 1.0 1.0 0.5 Error (dB) Error (dB) 0.5 0.0 0.0 -0.5 -1.0 0 500 1000 1500 2000 2500 3000 3500 -0.5 0 500 Fre que ncy (MHz ) 1000 1500 2000 2500 3000 3500 3000 3500 Fre que ncy (MHz ) Attenuation Error, 8 dB Bit Attenuation Error, Max. Attenuation 3.0 1.0 Error (dB) Error (dB) 2.0 0.5 0.0 1.0 0.0 -1.0 -0.5 0 500 1000 1500 2000 2500 Frequency (MHz) 3000 3500 0 500 1000 1500 2000 2500 Frequency (MHz ) 4 ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions • North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400 is considering for development. Performance is based on target specifications, simulated results, • India Tel: +91.80.4155721 • China Tel: +86.21.2407.1588 and/or prototype measurements. Commitment to develop is not guaranteed. Visit www.macomtech.com for additional data sheets and product information. PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Solutions has under development. Performance is based on engineering tests. Specifications are typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make Commitment to produce in volume is not guaranteed. changes to the product(s) or information contained herein without notice. AT90-1283 Digital Attenuator 15.5 dB, 5-Bit, TTL Driver, DC-3.5 GHz Rev. V11 Typical Performance Curves VSWR, 1 dB Bit VSWR, 0.5 dB Bit Inp ut Out p ut Inp ut Out p ut 1.6 1.4 VSWR Ratio VSWR Ratio 1.6 1.2 1.0 0 500 1000 1500 2000 2500 3000 1.4 1.2 1.0 3500 0 500 1000 Frequency (MHz) 1500 2000 2500 3000 3500 Fre que ncy (MHz ) VSWR, 2 dB Bit VSWR, 4 dB Bit I np ut Out p ut Inp ut 1.8 O ut p ut 1.6 VSWR Ratio VSWR Ratio 1.6 1.4 1.2 1.4 1.2 1.0 0 500 1000 1500 2000 2500 3000 1.0 3500 0 Fre que ncy (MHz ) 500 1000 1500 2000 2500 3000 3500 Fre que ncy (MHz ) VSWR, Maximum Attenuation VSWR, 8 dB Bit I np ut I np ut O ut p ut O ut p ut 1.8 1.6 VSWR Ratio VSWR Ratio 1.6 1.4 1.2 1.4 1.2 1.0 1.0 0 500 1000 1500 2000 2500 Fre que ncy (MHz ) 3000 3500 0 500 1000 1500 2000 2500 3000 3500 Fre que ncy (MHz ) 5 ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions • North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400 is considering for development. Performance is based on target specifications, simulated results, • India Tel: +91.80.4155721 • China Tel: +86.21.2407.1588 and/or prototype measurements. Commitment to develop is not guaranteed. Visit www.macomtech.com for additional data sheets and product information. PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Solutions has under development. Performance is based on engineering tests. Specifications are typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make Commitment to produce in volume is not guaranteed. changes to the product(s) or information contained herein without notice. AT90-1283 Digital Attenuator 15.5 dB, 5-Bit, TTL Driver, DC-3.5 GHz Rev. V11 CSP-1, 4 x 6 mm, 32-lead PQFN† † Reference Application Note M538 for lead-free solder reflow recommendations. 6 ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions • North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400 is considering for development. Performance is based on target specifications, simulated results, • India Tel: +91.80.4155721 • China Tel: +86.21.2407.1588 and/or prototype measurements. Commitment to develop is not guaranteed. Visit www.macomtech.com for additional data sheets and product information. PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Solutions has under development. Performance is based on engineering tests. Specifications are typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make Commitment to produce in volume is not guaranteed. changes to the product(s) or information contained herein without notice.