RoHS Compliant Digital Attenuator 32.0 dB, 2-Bit, TTL Driver, DC-2.0 GHz AT20-0273 V5 Features • Attenuation: 16 dB steps to 32 dB • Temperature Stability: ± 0.18 dB from –40°C to +85°C Typical • Low DC Power Consumption • Surface Mount Package • Integral TTL Driver • Low Cost/High Performance • 50 Ohm Nominal Impedance • Lead-Free CR-11 Package • 260°C Reflow Compatible Description Functional Schematic1 RF1 RF2 GND GND 16 dB GND GND GND GND 16 dB Vee GND Vcc C1 NC GND Orientation Mark PIN 16 NC 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. 1. Use the C1 control for a single 16-dB bit. Pin Configuration Pin No. Ordering Information Part Number Package AT20-0273 Bulk Packaging Note: Reference Application Note M513 for reel size information. Note: Die quantity varies. C2 PIN 1 Function Pin No. Function 1 C2 9 RF1 2 GND 10 GND 3 C1 11 GND 4 GND 12 GND 5 GND 13 Vee 6 GND 14 Vcc 7 GND 15 NC 8 RF2 16 NC 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 AT20-0273 V5 Electrical Specifications: TA = 25°C2 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 — — — 1.2 1.3 1.5 1.6 1.7 1.9 Attenuation Accuracy 3 C1 Bit Full Attenuation (32 dB) DC - 2.0 GHz DC - 0.5 GHz DC - 1.0 GHz DC - 2.0 GHz VSWR — DC - 2.0 GHz Ratio — — 1.4:1 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 — — +38 +48 — — Input IP2 For two-tone Input Power Up to +5 dBm 0.05 GHz 0.5 - 2.0 GHz dBm dBm — — +44 +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 — — 2.0 Iee Vee = -5.0 to -8.0V — mA — — 1.0 2. 3. ± 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 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 4. 5. 6. 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 6 -0.5V to Vcc +0.5V Operating Temperature -40°C to +125°C Storage Temperature -65°C to +150°C 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 32.0 dB, 2-Bit, TTL Driver, DC-2.0 GHz AT20-0273 V5 Truth Table (Digital Attenuator) Handling Procedures Control Input 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. C2 C1 Attenuation 0 0 Reference 0 1 16 dB 1 1 32 dB 0 = TTL Low; 1 = TTL High Typical Performance Curves Attenuation Accuracy vs. Frequency Ref. Insertion Loss vs. Frequency + 2 5 °C - 5 5 °C Full Atte nua tion Deviation from Nominal Atten (dB) + 8 5 °C 5 Loss (dB) 4 3 2 1 0 0.0 0.5 1.0 1.5 2.0 2.5 3 0.0 - 1.0 - 2.0 - 3.0 - 4.0 - 5.0 0.0 Frequency (GHz) 16 dB bit 1.0 0.5 1.0 1.5 2.0 2.5 3.0 Frequency (GHz) VSWR vs. Frequency Full Atte nua tion 16 dB S ta te 3 2 dB S ta te 2.00 VSW R 1.80 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 AT20-0273 V5 Lead-Free, CR-11 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.