AT90-1233 Digital Attenuator 30.0 dB, 4-Bit, TTL Driver, DC-2.5 GHz Functional Schematic Features • • • • • • • • Rev. V8 Attenuation: 2 dB Steps to 30 dB Single Positive Supply Contains Internal DC to DC Converter Integral TTL Driver 50 Ohm Impedance Test Boards Available Tape and Reel Packaging Available CSP-1 Package Description M/A-COM’s AT90-1233 is a GaAs FET 4-Bit digital attenuator with integral driver. Step size is 2 dB providing a 30 dB attenuation range. This device is in an FQFP-N plastic surface mount package. The AT90-1233 is suited for single supply applications where accuracy, fast speed, low power consumption and low costs are required. For dual supply designs without switching noise, use AT90-0233. Ordering Information Pin Configuration3 Pin No. Function Pin No. Function 1 GND 17 NC 2 C16 18 NC 3 C8 19 VCC 4 C4 20 NC 5 C2 21 Cp 6 GND 22 NC 7 GND 23 Cp 8 NC 24 NC Part Number Package 9 NC 25 VEE2 AT90-1233 Bulk Packaging 10 NC1 26 GND AT90-1233TR 1000 piece reel 11 GND 27 RF2 AT90-1233-TB Sample Test Board 12 RF1 28 GND 13 GND 29 NC1 14 NC 30 VEE2 15 NC 31 NC 16 NC 32 VCC Note: Reference Application Note M513 for reel size information. 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. AT90-1233 Digital Attenuator 30.0 dB, 4-Bit, TTL Driver, DC-2.5 GHz Rev. V8 Electrical Specifications: TA = 25°C, Z0 = 50Ω Parameter Test Conditions Frequency Units Min Typ Max Insertion Loss — DC - 2.5 GHz dB — 2.7 3.0 Attenuation Accuracy Individual Bits or Combination of Bits DC - 2.5 GHz dB — — ±(.3 +5% of atten setting) VSWR Full Range DC - 2.5 GHz Ratio — 1.5:1 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 - 2.5 GHz dBm dBm — — +21 +29 — — Input IP3 Two-tone inputs up to +5 dBm 50 MHz 0.5 - 2.5 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 Icc4 Vcc min to max, Logic “0” or “1” — mA — 6 10 Turn-on Current5 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 — 4. 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. 5. 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. Recommended PCB Configuration9 Absolute Maximum Ratings 6,7 Parameter Absolute Maximum Max. Input Power 0.05 GHz 0.5 - 2.5 GHz +27 dBm +34 dBm VCC -0.5V ≤ VCC ≤ +6.0V Vin 8 -0.5V ≤ Vin ≤ VCC + 0.5V Operating Temperature -40ºC to +85ºC Storage Temperature -65ºC to +125ºC 6. Exceeding any one or combination of these limits may cause permanent damage to this device. 7. M/A-COM does not recommend sustained operation near these survivability limits. 8. Standard CMOS TTL interface, latch-up will occur if logic signal is applied prior to power supply. 9. Application Note C2083 is available on line at www.macom.com 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. AT90-1233 Digital Attenuator 30.0 dB, 4-Bit, TTL Driver, DC-2.5 GHz Rev. V8 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. Truth Table (Digital Attenuator) C16 C6 C4 C2 Attenuation 0 0 0 0 Loss, Reference 0 0 0 1 2.0 dB 0 0 1 0 4.0 dB 0 1 0 0 8.0 dB 1 0 0 0 16.0 dB 1 1 1 1 30.0 dB 0 = TTL Low; 1 = TTL High 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. Typical Performance Curves VSWR @ Insertion Loss Insertion Loss O ut p ut 3.00 Inp ut 2.50 1.40 2.00 VSWR Attenuation (dB) 1.60 1.20 1.50 1.00 0 500 1000 1500 2000 2500 1.00 0 Fre que ncy (MHz ) 500 1000 1500 2000 2500 Fre que ncy (MHz ) Attenuation Error, 2 dB Bit Attenuation Error, 4 dB Bit 0.30 0.40 Attenuation (dB) Attenuation (dB) 0.20 0.10 0.00 -0.10 -0.20 -0.30 0 500 1000 1500 Fre que ncy (MHz ) 2000 2500 0.20 0.00 -0.20 -0.40 0 500 1000 1500 2000 2500 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. AT90-1233 Digital Attenuator 30.0 dB, 4-Bit, TTL Driver, DC-2.5 GHz Rev. V8 Typical Performance Curves Attenuation Error, 16 dB Bit 0.40 0.00 0.20 -0.20 Attenuation (dB) Attenuation (dB) Attenuation Error, 8 dB Bit 0.00 -0.20 -0.40 -0.40 -0.60 -0.80 0 500 1000 1500 2000 2500 0 500 1000 Fre que ncy (MHz ) 1500 2000 2500 Fre que ncy (MHz ) Attenuation Error, Max. Attenuation VSWR, 2 dB Bit Out p ut 0.50 Inp ut 1.40 -0.50 VSWR Attenuation (dB) 1.60 0.00 -1.00 1.20 -1.50 0 500 1000 1500 2000 2500 1.00 Fre que ncy (MHz ) 0 500 1000 1500 2000 2500 2000 2500 Fre que ncy (MHz ) VSWR, 4 dB Bit VSWR, 8 dB Bit O ut p ut Out p ut I np ut 1.60 1.40 1.40 VSWR VSWR 1.60 I np ut 1.20 1.20 1.00 1.00 0 500 1000 1500 Fre que ncy (MHz) 2000 2500 0 500 1000 1500 Fre que ncy (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. AT90-1233 Digital Attenuator 30.0 dB, 4-Bit, TTL Driver, DC-2.5 GHz Rev. V8 Typical Performance Curves VSWR, 16 dB Bit VSWR, Maximum Attenuation Out p ut I np ut Out p ut 1.60 1.40 1.40 VSWR VSWR 1.60 I np ut 1.20 1.20 1.00 1.00 0 500 1000 1500 2000 2500 Fre que ncy (MHz ) 0 500 1000 1500 2000 2500 Fre que ncy (MHz ) CSP-1, 4 x 6 mm, 32-lead PQFN† † Reference Application Note M538 for lead-free solder reflow recommendations. 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.