RoHS Compliant Digital Attenuator 31.0 dB, 5-Bit, TTL Driver, DC-2.0 GHz Features AT20-0263 V4 Functional Schematic * Attenuation: 1 dB steps to 31 dB * Temperature Stability: 0.18 dB from -40C to +85C Typical * Low DC Power Consumption * Surface Mount Package * Integral TTL Driver * Low Cost/High Performance * 50 Ohm Nominal Impedance * Lead-Free CR-12 Package * 260C Reflow Compatible C5 RF2 16 dB +5V GND 8 dB -5V C4 GND GND 4 dB C3 GND 2 dB C2 GND GND Orientation Mark C1 1 dB PIN 16 GND RF1 PIN 1 Description M/A-COM's AT20-0263 is a GaAs FET 5-bit digital attenuator with a 1 dB minimum step size and 31 dB total attenuation. This attenuator and integral TTL driver is in a ceramic 16-lead surface mount package. The AT20-0263 is ideally suited for use where accuracy, fast switching, very low power consumption and low intermodulation products are required. Typical applications include dynamic range setting in precision receiver circuits and other gain/leveling control circuits. Available with enhanced performance as fully hermetic version. Environmentally screenable as P/N AT-263-PIN. Pin Configuration Pin No. Function Pin No. Function 1 RF1 9 C5 2 GND 10 +5V 3 GND 11 -5V 4 GND 12 C4 5 GND 13 C3 6 GND 14 C2 7 GND 15 C1 8 RF2 16 GND The metal bottom of the case must be connected to RF and DC ground. Ordering Information Part Number Package AT20-0263 Bulk Packaging Note: Reference Application Note M513 for reel size information. Note: Die quantity varies. * Restrictions on Hazardous Substances, European Union Directive 2002/95/EC. 1 M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information. * North America Tel: 800.366.2266 / Fax: 978.366.2266 * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information. RoHS Compliant Digital Attenuator 31.0 dB, 5-Bit, TTL Driver, DC-2.0 GHz AT20-0263 V4 Electrical Specifications: TA = 25C1 Parameter Test Conditions Frequency Units Min Typ Max Reference Insertion Loss -- DC - 0.5 GHz DC - 1.0 GHz DC - 2.0 GHz dB dB dB -- -- -- 2.0 2.2 2.5 2.4 2.8 3.0 Attenuation Accuracy 2 Any Single Bit Any Combination of Bits DC - 1.0 GHz DC - 2.0 GHz VSWR -- DC - 2.0 GHz Ratio -- -- 1.6:1 Trise, Tfall 10% to 90% -- ns -- 50 -- Ton, Toff 50% Control to 90/10% RF -- ns -- 150 -- Transients In-Band (peak-peak) -- mV -- 50 -- 1 dB Compression Input Power Input Power 0.05 GHz 0.5 - 2.0 GHz dBm dBm -- -- +20 +28 -- -- Input IP3 For two-tone Input Power Up to +5 dBm 0.05 GHz 0.5 - 2.0 GHz dBm dBm -- -- +40 +48 -- -- Input IP2 For two-tone Input Power Up to +5 dBm 0.05 GHz 0.5 - 2.0 GHz dBm dBm -- -- +45 +68 -- -- Vcc -- -- V 4.5 5.0 5.5 Vee -- -- V -8.0 -- -5.0 Icc Vcc = 4.5 to 5.5V Vctl = 0 to 0.8V, or Vcc - 2.1V to Vcc -- mA -- -- 5.0 Iee Vee = -5.0 to -8.0V -- mA -- -- 1.0 (0.25 +3% of atten setting in dB) dB (0.25 +3% of atten setting in dB) dB or 0.4 dB, whichever is greater 1. All specifications apply when operated with bias voltages of +5V for Vcc and -5.0V for Vee. 2. This attenuator is guaranteed monotonic. Recommended PCB Configuration Absolute Maximum Ratings 3,4 3. 4. 5. Parameter Absolute Maximum Max Input Power 0.5 GHz 0.5 - 2.0 GHz +27 dBm +34 dBm Supply Voltages Vcc Vee +5.5V -8.5V Control Voltage 5 -0.5V to Vcc +0.5V Operating Temperature -40C to +125C Storage Temperature -65C to +150C 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. 2 M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information. * North America Tel: 800.366.2266 / Fax: 978.366.2266 * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information. RoHS Compliant Digital Attenuator 31.0 dB, 5-Bit, TTL Driver, DC-2.0 GHz AT20-0263 V4 Truth Table (Digital Attenuator) Handling Procedures Control Inputs Please observe the following precautions to avoid damage: C5 C4 C3 C2 C1 Attenuation 0 0 0 0 0 Reference Static Sensitivity 0 0 0 0 1 1 dB 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. 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 16 dB 1 1 1 1 1 31 dB 0 = TTL Low; 1 = TTL High Typical Performance Curves Attenuation Accuracy vs. Frequency + 8 5 C + 2 5 C Deviation from Nominal Atten (dB) Ref. Insertion Loss vs. Frequency - 5 5 C 5 Loss (dB) 4 3 2 1 1, 2 , 4 , 8 , 16 dB 0 - 0.5 -1 - 1.5 0.0 0 0.0 0.5 1.0 1.5 2.0 Full Atte nua tion 0.5 0.5 1.0 1.5 2.0 Frequency (GHz) Frequency (GHz) VSWR vs. Frequency 4 dB S ta te 1 dB S ta te 2.00 VSW R 1.80 1.60 1.40 1.20 1.00 0.00 0.50 1.00 1.50 2.00 Frequency (GHz) 3 M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information. * North America Tel: 800.366.2266 / Fax: 978.366.2266 * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information. RoHS Compliant Digital Attenuator 31.0 dB, 5-Bit, TTL Driver, DC-2.0 GHz AT20-0263 V4 Lead-Free CR-12 Ceramic Package Reference Application Note M538 for lead-free solder reflow recommendations. 4 M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information. * North America Tel: 800.366.2266 / Fax: 978.366.2266 * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information.