AT90-0001 Digital Attenuator, 31.0 dB, 5-Bit, TTL Driver, DC-6.0 GHz CSP-1 Features n n n n n n n V 5.00 Attenuation: 1.0 dB Steps to 31 dB High Accuracy to 6 GHz Small Footprint, JEDEC Package Integral TTL driver 50 ohm impedance Test boards are available Tape and Reel Packaging Available Description M/A-COM’s AT90-0001 is a GaAs FET 5-bit digital attenuator with an integral TTL driver. Step size is 1.0 dB providing 31 dB total attenuation range. This device is in a 32 lead FQFP-N surface mount package. Due to superior grounding techniques this digital attenuator offers superior performance to 6 GHz. The AT90-0001 is ideally suited for use where accuracy, fast speed, very low power consumption and low costs are required. Electrical Specifications TA = +25°C Parameter Test Conditions Frequency Units Min Typical Max Insertion Loss — DC - 2.0 GHz DC - 4.0 GHz DC - 6.0 GHz dB dB dB — — — 2.5 3.3 5.0 3.1 3.8 5.8 Attenuation Accuracy 1 to 24 dB Bits 25 to 31 dB Bits DC - 6.0 GHz DC - 6.0 GHz dB dB — — — — ±(0.3 +4% of atten.) ±(0.3 +5% of atten.) VSWR Full Range DC - 2.0 GHz DC - 6.0 GHz Ratio Ratio — — 1.4:1 1.7:1 1.7:1 2.4:1 1 dB Compression — — 50 MHz 0.5 - 6.0 GHz dBm dBm — — +22 +28 — — Input IP2 Two tone inputs to +5 dBm 50 MHz 0.5 - 6.0 GHz dBm dBm — — +43 +60 — — Input IP3 Two-tone inputs up to +5 dBm 50 MHz 0.5-6.0 GHz dB dB — — +37 +48 — — Vcc -Vee — — — — V V 4.75 -8.0 5.0 -5.0 5.25 -4.75 Switching Speed 50% Cntl to 90%/10% RF 10% to 90% or 90% to 10% — — nS nS — — 25 15 — — Logic "0" Logic "1" Sink Current is 20 µA Max. Source Current is 20 µA Max. — — V V 0.0 2.0 - 0.8 5.0 Icc Vcc min to max, Logic “0” or 1” — mA — 0.2 6 -Iee Vee min to max, Logic “0” or 1” — mA — -0.2 -1 Digital Attenuator, 31.0 dB, 5-Bit, TTL Driver, DC - 6.0 GHz AT90-0001 V 5.00 Absolute Maximum Ratings 1 Truth Table Parameter Absolute Maximum Max. Input Power 0.05 GHz 0.5 - 6.0 GHz +27 dBm +34 dBm +Vcc +5.5V -Vee -8.5V Logic Voltages 2 C16 C8 C4 C2 C1 Attenuation 0 0 0 0 0 Loss, Reference 0 0 0 0 1 1 dB 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 -0.5 to Vcc + 0.5V Operating Temperature -40°C to +85°C Storage Temperature -65°C to +125°C 1. Operation of this device above any one of these parameters may cause permanent damange. 2. Standard CMOS TTL interface, latch-up will occur if logic signal is applied prior to power supply. 0 = TTL Low; 1 = TTL High Recommended PCB Layout 3 Pin Configuration Pin # Function Pin # Function 1 NC 17 NC 2 C16 18 NC 3 C8 19 NC 4 C4 20 NC 5 C2 21 NC 6 C1 22 NC 7 GND 23 NC 8 NC 24 NC 9 NC 25 NC 10 NC 26 GND 11 GND 27 RF2 12 RF1 28 GND 13 GND 29 NC 14 NC 30 -Vee 15 NC 31 NC 16 NC 32 +Vcc 3. Application Note C2083 is available on line at www.macom.com NC = No Connection Specifications subject to change without notice. n North America: Tel. (800) 366-2266 n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 Visit www.macom.com for additional data sheets and product information. 2 Digital Attenuator, 31.0 dB, 5-Bit, TTL Driver, DC - 6.0 GHz AT90-0001 V 5.00 Typical Performance Curves Insertion Loss vs. Frequency +25°C RF2 - 31 dB - 40°C 6 2.4 5 2.2 RF1 - 31 dB RF1 - IL RF1 - IL RF2 - IL 2.0 4 VSWR Insertion Loss (dB) +85°C VSWR vs. Frequency 3 2 1.8 1.6 1.4 1 1.2 1.0 0 0.0 1.0 2.0 3.0 4.0 5.0 0.0 6.0 1.0 2.0 3.0 4.0 5.0 6.0 Frequency (GHz) Frequency (GHz) Accuracy (dB) vs. Frequency Accuracy (dB) vs. Frequency 1 dB 1 dB 16 dB 2 dB 1.50 0.25 0.75 Accuracy (dB) Accuracy (dB) 4 dB 0.50 0.00 -0.25 31 dB 8 dB 0.00 -0.75 -1.50 -0.50 0.0 1.0 2.0 3.0 4.0 5.0 6.0 Frequency (GHz) 0.0 1.0 2.0 3.0 4.0 5.0 6.0 Frequency (GHz) Ordering Information Part Number Package AT90-0001 Bulk Packaging AT90-0001TR Tape and Reel (1K Reel) AT90-0001-TB Units Mounted on Test Board Specifications subject to change without notice. n North America: Tel. (800) 366-2266 n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 Visit www.macom.com for additional data sheets and product information. 3