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| RoHS Compliant Digital Attenuator 32.0 dB, 2-Bit, TTL Driver, DC-2.0 GHz Features Attenuation: 16.0 dB Steps to 32 dB Low DC Power Consumption Hermetic Surface Mount Package Integral TTL Driver 50 ohm Impedance Temperature Stability: 0.18 dB from -55C to +85C Typ. * Tape and Reel Packaging Available * Lead-Free CR-11 Package * 260C Reflow Compatible * * * * * * AT-273-PIN V8 Functional Schematic1 RF1 GND GND GND Vee Vcc NC PIN 16 NC 16 dB 16 dB RF2 GND GND GND GND C1 GND Orientation Mark C2 PIN 1 Description M/A-COM's AT-273-PIN is a GaAs FET digital attenuator with a 16.0 dB minimum step size and a 32 dB total attenuation range. This attenuator and integral TTL driver is in a hermetically sealed ceramic 16-lead surface mount package. The AT273-PIN 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. Environmental screening is available. Contact the factory for information. 1. Use the C1 control for a single 16-dB bit. Pin Configuration Pin No. 1 2 3 4 5 6 7 8 Function C2 GND C1 GND GND GND GND RF2 Pin No. 9 10 11 12 13 14 15 16 Function RF1 GND GND GND Vee Vcc NC NC The metal bottom of the case must be connected to RF and DC ground. Ordering Information Part Number AT-273-PIN Package 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 32.0 dB, 2-Bit, TTL Driver, DC-2.0 GHz Electrical Specifications: TA = 25C1,2 Parameter Insertion Loss AT-273-PIN V8 Test Conditions -- Frequency DC - 0.5 GHz DC - 1.0 GHz DC - 2.0 GHz DC - 2.0 GHz DC - 0.5 GHz DC - 1.0 GHz DC - 2.0 GHz DC - 2.0 GHz -- -- -- 0.05 GHz 0.5 - 2.0 GHz 0.05 GHz 0.5 - 2.0 GHz 0.05 GHz 0.5 - 2.0 GHz -- -- -- -- -- -- -- Units dB dB dB Min -- -- -- Typ -- -- -- Max 1.6 1.7 1.9 Attenuation Accuracy C1 Bit Full Attenuation (32 dB) Full Attenuation (32 dB) Full Attenuation (32 dB) Full Range 10% to 90% 50% Cntl to 90% / 10% RF In-Band (peak-to-peak) Input Power Input Power Two-tone inputs up to +5 dBm Two-tone inputs up to +5 dBm -- -- Logic (0) TTL Logic (1) TTL 0 to 0.8V 2.0 to 5.0V Vcc = 4.5 to 5.5V Vctl = 0 to 0.8V, or Vcc -2.1V to Vcc Vee = -5.0 to -8.0V 3% of attenuation setting in dB 3% of attenuation setting in dB 3% of attenuation setting in dB, -1 dB 3% of attenuation setting in dB, -3 dB Ratio ns ns mV dBm dBm dBm dBm dBm dBm V V V V A A mA -- -- -- -- -- -- -- -- -- -- 4.5 -8.0 0.0 2.0 -- -- -- -- 7 28 30 +20 +28 +38 +48 +44 +68 5.0 -- -- -- -- -- -- 1.6:1 -- -- -- -- -- -- -- -- -- 5.5 -5.0 0.8 5.0 1.0 1.0 2.0 VSWR Trise, Tfall Ton, Toff Transients 1 dB Compression Input IP3 Input IP2 Vcc -Vee Vctl Vctl Input Leakage Current (Low) Input Leakage Current (High) Icc -Iee -- mA -- -- -1 1. All specifications apply when operated with bias voltages of +5V for Vcc and -5.0V for Vee. 2. This attenuator is guaranteed monotonic. 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 32.0 dB, 2-Bit, TTL Driver, DC-2.0 GHz Absolute Maximum Ratings 3,4 Parameter Max. Input Power 0.05 GHz 0.5 - 2.0 GHz +Vcc -Vee Control Voltage5 Operating Temperature Storage Temperature 3. 4. 5. AT-273-PIN V8 Absolute Maximum +27 dBm +34 dBm +5.5V -8.5V -0.5 to Vcc + 0.5V -55C to +125C -65C to +150C Truth Table (Digital Attenuator) C1 0 0 1 C2 0 1 1 Attenuation Loss, Reference 16.0 dB 32.0 dB 0 = TTL Low; 1 = TTL High 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. Typical Performance Curves Ref. Insertion Loss vs. Frequency Handling Procedures 5 + 8 5 C + 2 5 C - 5 5 C Please observe the following precautions to avoid damage: 4 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. Loss (dB) 3 2 1 0 0.0 0.5 1.0 1.5 2.0 2.5 3 Frequency (GHz) Attenuation Accuracy vs. Frequency VSWR vs. Frequency Full Atte nua tion 16 dB bit Full Atte nua tion 2.00 1.80 16 dB S ta te 3 2 dB S ta te Deviation from Nominal Atten (dB) 1.0 0.0 - 1.0 - 2.0 - 3.0 VSW R 1.60 1.40 1.20 - 4.0 - 5.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 1.00 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Frequency (GHz) Frequency (GHz) * 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. 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. RoHS Compliant Digital Attenuator 32.0 dB, 2-Bit, TTL Driver, DC-2.0 GHz Lead-Free CR-11 Ceramic Package AT-273-PIN V8 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. |
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