AT90-0283 Digital Attenuator, 15.5 dB, 5-Bit, TTL Driver, DC-3.5 GHz CSP-1 Features n n n n n n n V 6.00 Attenuation: 0.5 dB Steps to 15.5 dB Low DC Power Consumption Small Footprint, JEDEC Package Integral TTL Driver 50 ohm Impedance Test Boards are Available Tape and Reel Packaging Available Description M/A-COM's AT90-0283 is a GaAs FET 5-bit digital attenuator with integral TTL driver. Step size is 0.5 dB providing a 15.5 dB total attenuation range. This device is in an FQFP-N plastic surface mount package. The AT900283 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 - 3.5 GHz dB — 2.8 3.2 Attenuation Accuracy Individual Bits 0.5-1-4-8 dB Individual Bit 2 dB Any Combination of Bits 1 to 15.5 dB DC - 3.5 GHz DC - 3.5 GHz DC - 3.5 GHz dB dB dB — — — — — — ±(.3 +5% of atten setting) ±(.4 +10% of atten setting) ±(.5 +7% of atten setting) VSWR Full Range DC - 3.5 GHz Ratio — 1.6:1 1.8:1 Switching Speed 50% Cntl to 90%/10% RF 10% to 90% or 90% to 10% — — nS nS — — 75 20 150 50 1 dB Compression — — 50 MHz 0.5 - 3.5 GHz dBm dBm — — +21 +29 — — Input IP3 Two-tone inputs up to +5 dBm 50 MHz 0.5-3.5 GHz dB dB — — +35 +48 — — +Vcc -Vee — — — — V V 4.75 -8.0 5.0 -5.0 5.25 -4.75 Logic “0” Sink Current is 20 µA max. — V 0.0 — 0.8 Logic “1” Source Current is 20 µA max. — V 2.0 — 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, 15.5 dB, 5-Bit, TTL Driver, DC - 3.5 GHz AT90-0283 V 6.00 Pin Configuration Recommended PCB Layout 2 Pin # Function Pin # Function 1 GND 17 NC 2 C8 18 NC 3 C4 19 NC 4 C2 20 NC 5 C1 21 NC 6 C0.5 22 NC 7 8 9 GND NC NC 23 24 25 NC NC NC 10 NC1 26 GND 11 GND 27 RF2 12 RF1 28 GND 13 14 GND NC 29 30 NC1 -Vee 15 NC 31 NC 16 NC 32 +Vcc 1. Pins 10 & 29 must be isolated 2. Application Note C2083 is available on line at www.macom.com Truth Table C8 0 C4 0 C2 0 C1 0 C0.5 0 Attenuation Loss, Reference 0 0 0 0 1 0.5 dB 0 0 0 1 0 1.0 dB 0 0 1 0 0 2.0 dB 0 1 0 0 0 4.0 dB 1 1 0 1 0 1 0 1 0 1 8.0 dB 15.5 dB 0 = TTL Low; 1 = TTL High Absolute Maximum Ratings 3 Parameter Absolute Maximum Max. Input Power 0.05 GHz 0.5 - 3.5 GHz +27 dBm +34 dBm +Vcc +5.5V -Vee Logic Voltages -8.5V 4 -0.5 to +Vcc + 0.5V Operating Temperature -40°C to +85°C Storage Temperature -65°C to +125°C 3. Operation of this device above any one of these parameters may cause permanent damange. 4. Standard CMOS TTL interface, latch-up will occur if logic signal is applied prior to power supply. 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, 15.5 dB, 5-Bit, TTL Driver, DC - 3.5 GHz AT90-0283 V 6.00 Typical Performance Curves Insertion Loss VSWR @ Insertion Loss Input 3.0 VSWR Ratio 2.5 Loss (dB) Output 1.75 2.0 1.50 1.25 1.5 1.00 1.0 0 500 1000 1500 2000 2500 3000 0 3500 500 1000 Frequency (MHz) 2000 2500 3000 3500 3000 3500 3000 3500 Frequency (MHz) Attenuation Error, 0.5 dB Bit Attenuation Error, 1 dB Bit 1.0 1.0 0.5 0.5 Error (dB) Error (dB) 1500 0.0 0.0 -0.5 -0.5 -1.0 -1.0 0 500 1000 1500 2000 2500 3000 0 3500 500 1000 1500 2000 2500 Frequency (MHz) Frequency (MHz) Attenuation Error, 4 dB Bit Attenuation Error, 2 dB Bit 1.0 1.0 Error (dB) Error (dB) 0.5 0.0 0.5 0.0 -0.5 -0.5 -1.0 0 500 1000 1500 2000 2500 3000 3500 Frequency (MHz) 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. 0 500 1000 1500 2000 2500 Frequency (MHz) 3 Digital Attenuator, 15.5 dB, 5-Bit, TTL Driver, DC - 3.5 GHz AT90-0283 V 6.00 Typical Performance Curves Attenuation Error, Max. Attenuation Attenuation Error, 8 dB Bit 1.0 3.0 Error (dB) 2.0 Error (dB) 0.5 0.0 1.0 0.0 -1.0 -0.5 0 500 1000 1500 2000 2500 3000 0 3500 500 1000 Frequency (MHz) VSWR, 0.5 dB Bit 2500 3000 3500 Input Output 1.6 VSWR Ratio 1.6 VSWR Ratio 2000 VSWR, 1 dB Bit Output Input 1.4 1.2 1.4 1.2 1.0 1.0 0 500 1000 1500 2000 2500 3000 0 3500 500 1000 1500 2000 2500 3000 3500 3000 3500 Frequency (MHz) Frequency (MHz) VSWR, 4 dB Bit VSWR, 2 dB Bit Input Input Output Output 1.6 1.8 1.6 VSWR Ratio VSWR Ratio 1500 Frequency (MHz) 1.4 1.4 1.2 1.2 1.0 0 500 1000 1500 2000 2500 3000 3500 Frequency (MHz) 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. 1.0 0 500 1000 1500 2000 2500 Frequency (MHz) 4 Digital Attenuator, 15.5 dB, 5-Bit, TTL Driver, DC - 3.5 GHz AT90-0283 V 6.00 Typical Performance Curves VSWR, Maximum Attenuation VSWR, 8 dB Bit Input Output Input VSWR Ratio VSWR Ratio Output 1.8 1.6 1.4 1.2 1.6 1.4 1.2 1.0 1.0 0 500 1000 1500 2000 2500 3000 3500 Frequency (MHz) 0 500 1000 1500 2000 2500 3000 3500 Frequency (MHz) Ordering Information Part Number Package AT90-0283 Bulk Packaging AT90-0283TR Tape and Reel (1K Reel) AT90-0283-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. 5