Digital Attenuator, 15 dB, 4-Bit, TTL Driver, DC - 4.0 GHz AT90-1413 V 1.00 Features n n n n n n n n CSP-1 Attenuation: 1 dB Steps to 15 dB Single Positive Supply Contains Internal DC to DC Converter Small Footprint, JEDEC Package Integral TTL Driver 50 Ohm Impedance Test Boards Available Tape and Reel Packaging Available Description M/A-COM’s AT90-1413 is a GaAs FET 4-Bit digital attenuator with integral driver. Step size is 1 dB providing a 15 dB attenuation range. This device is in an FQFP-N plastic surface mount package. The AT90-1413 is suited for single supply applications where accuracy, fast speed, low power consumption and low costs are required. Electrical Specifications: TA = 25°C Parameter Test Conditions Frequency Units Min. Typ. Max. Insertion Loss — DC-2.5 GHz DC-4.0 GHz dB dB — — 2.0 2.5 2.5 3.0 Attenuation Accuracy Individual Bits or Combination of Bits DC-2.5 GHz DC-4.0 GHz dB dB — — — — ±(0.3+4% of atten setting) ±(0.3+6% of atten setting) VSWR Full Attenuation Range DC-2.5 GHz DC-4.0 GHz Ratio Ratio — — 1.5:1 1.8:1 1.8:1 2.0:1 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 0.5-4.0 GHz dB dB — — +21 +29 — — Input IP3 Two-tone Inputs up to +5 dBm 50 MHz 0.5-4.0 GHz dB dB — — +35 +48 — — +Vcc — — V 4.75 5.0 5.25 Logic “0” Sink Current is 20 µA max. — V 0.0 — 0.8 Logic “1” Sink Current is 20 µA max. — V 2.0 — 5.0 Icc Vcc min to max, Logic “0” or “1” — mA — 6 10 Digital Attenuator, 15 dB, 4-Bit, TTL Driver, DC - 4.0 GHz AT90-1413 V 1.00 Recommended PCB Layout 7 Pin Configuration Pin No. Function Pin No. Function 1 GND 17 N/C 2 C8 18 N/C 3 C4 19 +Vcc 2 4 C2 20 N/C 5 C1 21 Cp 4 6 GND 22 N/C 7 GND 23 Cp 4 8 N/C 24 N/C 9 N/C 25 -Vee 3 10 N/C1 26 GND 11 GND 27 RF2 12 RF1 28 GND 13 GND 29 N/C1 14 N/C 30 -Vee 3,5 15 N/C 31 N/C 16 N/C 32 +Vcc 2,6 1. 2. 3. 4. 5. Pins 10 & 29 must be isolated. Pin 19 must be connected to Pin 32. Pin 25 must connect to Pin 30. A .01 µF cap must be connected between Pins 21 and 23. -Vee is produced internally and requires a .1 µF cap to GND 6. +Vcc requires a .1 µF cap to GND. Truth Table 7. Application Note C2083 is available on line at www.macom.com Absolute Maximum Ratings 8 Parameter Absolute Maximum Max. Input Power 0.05 GHz 0.5 - 4.0 GHz +27 dBm +34 dBm +Vcc +5.5V C8 C4 C2 C1 Attenuation 0 0 0 0 Loss, Reference 0 0 0 1 1.0 dB Operating Temperature -40°C to +85°C 0 0 1 0 2.0 dB Storage Temperature -65°C to +125°C 0 1 0 0 4.0 dB 1 0 0 0 8.0 dB 1 1 1 1 15.0 dB 0 = TTL Low; 1 = TTL High Logic Voltages 9 -0.5 to +Vcc + 0.5V 8. Operation of this device above any one of these parameters may cause permanent damange. 9. Standard CMOS TTL interface, latch-up will occur if logic signal is applied prior to power supply. 2 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. Digital Attenuator, 15 dB, 4-Bit, TTL Driver, DC - 4.0 GHz AT90-1413 V 1.00 Typical Performance Curves VSWR @ Insertion Loss Insertion Loss RF In 1.40 VSWR Attenuation (dB) 2.50 2.00 1.20 1.50 1.00 1.00 0 500 1000 1500 2000 2500 3000 3500 0 4000 500 1000 2000 2500 3000 3500 4000 3500 4000 3500 4000 Attenuation Error, 2 dB Bit Attenuation Error, 1 dB Bit 0.30 0.30 0.20 0.20 Attenuation (dB) Attenuation (dB) 1500 Frequency (MHz) Frequency (MHz) 0.10 0.00 -0.10 0.10 0.00 -0.10 -0.20 -0.20 -0.30 -0.30 0 500 1000 1500 2000 2500 3000 3500 0 4000 500 1000 1500 2000 2500 3000 Frequency (MHz) Frequency (MHz) Attenuation Error, 8 dB Bit Attenuation Error, 4 dB Bit 0.60 0.20 0.40 0.00 Attenuation (dB) Attenuation (dB) RF Out 1.60 3.00 0.20 0.00 -0.20 -0.40 -0.60 -0.20 0 500 1000 1500 2000 2500 3000 3500 4000 Frequency (MHz) 0 500 1000 1500 2000 2500 3000 Frequency (MHz) 3 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. Digital Attenuator, 15 dB, 4-Bit, TTL Driver, DC - 4.0 GHz AT90-1413 V 1.00 Typical Performance Curves Attenuation Error, Max. Attenuation VSWR, 1 dB Bit RF In 0.40 0.20 1.40 VSWR Attenuation (dB) RF Out 1.60 0.00 1.20 -0.20 -0.40 0 500 1000 1500 2000 2500 3000 3500 1.00 4000 0 500 1000 Frequency (MHz) 1500 2000 2500 3000 3500 4000 3000 3500 4000 3500 4000 Frequency (MHz) VSWR, 4 dB Bit VSWR, 2 dB Bit RF In RF In RF Out 1.60 1.40 1.40 RF Out VSWR VSWR 1.60 1.20 1.20 1.00 1.00 0 500 1000 1500 2000 2500 3000 3500 0 4000 500 1000 1500 2000 2500 Frequency (MHz) Frequency (MHz) VSWR, Max. Attenuation VSWR, 8 dB Bit RF In RF In RF Out 1.60 1.40 1.40 VSWR VSWR 1.60 RF Out 1.20 1.20 1.00 1.00 0 500 1000 1500 2000 2500 3000 3500 4000 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 3000 Frequency (MHz) 4 Digital Attenuator, 15 dB, 4-Bit, TTL Driver, DC - 4.0 GHz AT90-1413 V 1.00 Ordering Information Part Number Package AT90-1413 Bulk Packaging AT90-1413TR Tape and Reel (1K Reel) AT90-1413-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