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| RoHS Compliant Digital Attenuator 32.0 dB, 2-Bit, TTL Driver, DC-2.0 GHz Features * Attenuation: 16 dB steps to 32 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-11 Package * 260C Reflow Compatible AT20-0273 V5 Functional Schematic1 RF1 GND GND GND Vee Vcc NC 16 dB 16 dB RF2 GND GND GND GND C1 GND Orientation Mark C2 PIN 1 Description M/A-COM's AT20-0273 is a GaAs FET digital attenuator with a 16 dB minimum step size and 32 dB total attenuation. This attenuator and integral TTL driver is in a sealed ceramic 16-lead surface mount package. The AT20-0273 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-273-PIN. PIN 16 NC 1. Use the C1 control for a single 16-dB bit. Pin Configuration Pin No. 1 2 3 4 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 Ordering Information Part Number AT20-0273 5 6 Package Bulk Packaging 7 8 Note: Reference Application Note M513 for reel size information. Note: Die quantity varies. The metal bottom of the case must be connected to RF and DC ground. * 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 = 25C2 Parameter Reference Insertion Loss AT20-0273 V5 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 1.2 1.3 1.5 Max 1.6 1.7 1.9 Attenuation Accuracy 3 C1 Bit Full Attenuation (32 dB) 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 mA mA -- -- -- -- -- -- -- -- -- -- 4.5 -8.0 -- -- -- 50 150 50 +20 +28 +38 +48 +44 +68 5.0 -- -- -- 1.4:1 -- -- -- -- -- -- -- -- -- 5.5 -5.0 2.0 1.0 VSWR Trise, Tfall Ton, Toff Transients 1 dB Compression Input IP3 Input IP2 Vcc Vee Icc Iee 2. 3. -- 10% to 90% 50% Control to 90/10% RF In-Band (peak-peak) Input Power Input Power For two-tone Input Power Up to +5 dBm For two-tone Input Power Up to +5 dBm -- -- Vcc = 4.5 to 5.5V Vctl = 0 to 0.8V, or Vcc -2.1V to Vcc Vee = -5.0 to -8.0V All specifications apply when operated with bias voltages of +5V for Vcc and -5.0V for Vee. This attenuator is guaranteed monotonic. Absolute Maximum Ratings 4,5 Parameter Max Input Power 0.5 GHz 0.5 - 2.0 GHz Supply Voltages Vcc Vee Control Voltage 6 Operating Temperature Storage Temperature 4. 5. 6. 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. Absolute Maximum +27 dBm +34 dBm +5.5V -8.5V -0.5V to Vcc +0.5V -40C to +125C -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. * 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 AT20-0273 V5 Truth Table (Digital Attenuator) Handling Procedures Please observe the following precautions to avoid damage: Control Input C2 0 C1 0 1 1 Attenuation Reference 16 dB 32 dB 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. 0 1 0 = TTL Low; 1 = TTL High Typical Performance Curves Ref. Insertion Loss vs. Frequency + 8 5 C 5 + 2 5 C - 5 5 C Attenuation Accuracy vs. Frequency Full Atte nua tion 16 dB bit Deviation from Nominal Atten (dB) 0.5 1.0 1.5 2.0 2.5 3 1.0 0.0 - 1.0 - 2.0 - 3.0 - 4.0 - 5.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 4 Loss (dB) 3 2 1 0 0.0 Frequency (GHz) Frequency (GHz) VSWR vs. Frequency Full Atte nua tion 2.00 1.80 16 dB S ta te 3 2 dB S ta te VSW R 1.60 1.40 1.20 1.00 0.0 0.5 1.0 1.5 2.0 2.5 3.0 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 32.0 dB, 2-Bit, TTL Driver, DC-2.0 GHz Lead-Free, CR-11 Ceramic Package AT20-0273 V5 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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