AT90-0233 Digital Attenuator, 30 dB, 4-Bit, TTL Driver, DC - 2.5 GHz Features V 1.00 CSP-1 n Attenuation: 2 dB Steps to 30 dB n Low DC Power Consumption n Small Footprint, JEDEC Package n Integral TTL Driver n 50 Ohm Impedance n Test Boards Available n Tape and Reel Packaging Available Description M/A-COM’s AT90-0233 is a GaAs FET 4-Bit digital attenuator with integral driver. Step size is 2 dB providing a 30 dB attenuation range. This device is in an FQFP-N plastic surface mount package. The AT90-0233 is 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 - 2.5 GHz dB — 2.7 3.0 Attenuation Accuracy Individual Bits or Combination of Bits DC - 2.5 GHz dB — — ±(.3 +5% of atten setting) VSWR Full Range DC - 2.5 GHz Ratio — 1.5:1 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 - 2.5 GHz dBm dBm — — +21 +29 — — Input IP3 Two-tone inputs up to +5 dBm 50 MHz 0.5 - 2.5 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, 30 dB, 4-Bit, TTL Driver, DC - 2.5 GHz AT90-0233 V 1.00 Recommended PCB Layout 2 Pin Configuration Pin No. Function Pin No. Function 1 GND 17 N/C 2 C16 18 N/C 3 C8 19 N/C 4 C4 20 N/C 5 C2 21 N/C 6 GND 22 N/C 7 GND 23 N/C 8 N/C 24 N/C 9 N/C 25 N/C 10 1 N/C 26 GND 11 GND 27 RF2 12 RF1 28 GND 13 GND 29 N/C1 14 N/C 30 VEE 15 N/C 31 N/C 16 N/C 32 VCC 2. Application Note C2083 is available on line at www.macom.com Absolute Maximum Ratings 3 1. Pins 10 and 29 must be isolated. Truth Table C16 C6 C4 C2 Attenuation 0 0 0 0 Loss, Reference 0 0 0 1 2.0 dB 0 0 1 0 4.0 dB 0 1 0 0 8.0 dB 1 0 0 0 16.0 dB 1 1 1 1 30.0 dB 0 = TTL Low; 1 = TTL High Parameter Absolute Maximum Max. Input Power 0.05 GHz 0.5 - 2.5 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. Ordering Information Part Number Package AT90-0233 Bulk Packaging AT90-0233TR Tape and Reel (1K Reel) AT90-0233-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. 2 Digital Attenuator, 30 dB, 4-Bit, TTL Driver, DC - 2.5 GHz AT90-0233 V 1.00 Typical Performance Curves Insertion Loss VSWR @ Insertion Loss Output Input 1.60 2.50 1.40 VSWR Attenuation (dB) 3.00 2.00 1.20 1.50 1.00 1.00 0 500 1000 1500 2000 0 2500 500 1000 1500 2000 2500 Frequency (MHz) Frequency (MHz) Attenuation Error, 4 dB Bit Attenuation Error, 2 dB Bit 0.30 0.40 Attenuation (dB) Attenuation (dB) 0.20 0.10 0.00 -0.10 0.20 0.00 -0.20 -0.20 -0.30 -0.40 0 500 1000 1500 2000 2500 0 500 Frequency (MHz) 1500 2000 2500 Attenuation Error, 16 dB Bit Attenuation Error, 8 dB Bit 0.40 0.00 0.20 -0.20 Attenuation (dB) Attenuation (dB) 1000 Frequency (MHz) 0.00 -0.20 -0.40 -0.40 -0.60 -0.80 0 500 1000 1500 2000 2500 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, 30 dB, 4-Bit, TTL Driver, DC - 2.5 GHz AT90-0233 V 1.00 Typical Performance Curves Attenuation Error, Max. Attenuation VSWR, 2 dB Bit Output 0.50 0.00 1.40 VSWR Attenuation (dB) Input 1.60 -0.50 1.20 -1.00 -1.50 1.00 0 500 1000 1500 2000 2500 0 500 1000 2000 2500 2000 2500 VSWR, 8 dB Bit VSWR, 4 dB Bit Output 1500 Frequency (MHz) Frequency (MHz) Output Input 1.60 1.40 1.40 VSWR VSWR 1.60 Input 1.20 1.20 1.00 1.00 0 500 1000 1500 2000 0 2500 500 Frequency (MHz) 1000 1500 Frequency (MHz) VSWR, Maximum Attenuation VSWR, 16 dB Bit Output Input Output 1.60 1.40 1.40 VSWR VSWR 1.60 Input 1.20 1.20 1.00 1.00 0 500 1000 1500 2000 2500 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) 4