Digital Attenuator, 1 Bit, 15 dB Step DC - 2.0 GHz AT-267 V 2.00 Features Functional Schematic Single 15 dB Step Low Loss, 0.3 dB Typical @ 900 MHz 2.7 to 5.0 Volt Operation Insertion Loss, Attenuation insensitive to Control Voltage Low Cost SOT-25 Plastic Package Tape and Reel Packaging Available V2 V1 PIN 5 Description M/A-COM’s AT-267 is a 1 bit, 15 dB step GaAs MMIC digital attenuator in a low cost SOT-25 5 lead surface mount plastic package. The AT-267 is ideally suited for use where high accuracy, very low power consumption and low intermodulation products are required. Typical applications include wireless handsets, base stations, wireless LAN equipment, GPS receivers and any RF applications with automatic gain/level control circuits. PIN 1 RF1 GND RF2 Positive Control Voltage The AT-267 is fabricated as a monolithic GaAs integrated circuit using a proven self-aligned gate process. The process features full chip passivation for performance and reliability. V2 V1 5 4 Truth Table 1, 2, 3 Mode (Control) Positive1 Postitive/ Negative1,2 Negative3 V1 V2 Atten 0 ± 0.2 V +2.5 V to +5 V -Vc ± 0.2 V +Vc 0 ± 0.2 V -2.5 V to -5 V +2.5 V to +5 V 0 ± 0.2 V +Vc -Vc ± 0.2 V -2.5 V to -5 V 0 ± 0.2 V 15 dB IL 15 dB IL IL 15 dB 1. External DC blocking capacitors are required as noted* 2. |-Vc|+ Vc 8 V 3. If negative control is used, DC blocking capacitors are not required on RF Ports and Ground. Absolute Maximum Ratings1 Parameter Maximum Input Power Control Voltage VCTL Absolute Maximum +21 dBm -8 V Operating Temperature -40° C to +85° C Storage Temperature -65° C to +150° C 1. Exceeding any one or a combination of these limits may cause permanent damage. 1 39 pF 2 39 pF RF1 GND 3 39 pF RF2 Digital Attenuator, 1 Bit, 15 dB Step, DC - 2.0 MHz AT-267 V 2.00 Electrical Specifications: TA = +25 °C, VCTRL = +2.7 Volts1= Parameter Insertion Loss 1.0 GHz Test Conditions Units dB Min. Typ. 0.3 Max. 0.4 0.4 0.5 15 14 15.5 14.5 16 15 2.0 GHz dB Attenuation 1.0 GHz 2.0 GHz dB dB VSWR 1.0 GHz 2.0 GHz Input IP3 1.0 GHz (0 dBm), Attenuator OFF Attenuator ON dBm 40 40 43 45 P1dB 1 GHz, Attenuator OFF Attenuator ON dBm 19 13 22 17 1.2:1 1.3:1 Leakage Current µA 10% to 90% RF, 90% to 10% RF 50% Control to 90% RF, Control to 10% RF In Band Trise, Tfall Ton, Toff Transients 10 nS nS mV 150 150 10 1. All measurements in a 50-τ system unless otherwise specified. The RF ports must be blocked out side of the package from ground or any other voltage. Typical Performance Curves VSWR, 0 and 15 dB States with Negative Control (-2.7 V) +25 °C 2.0 0.8 +85 °C 1.8 0.6 VSWR Insertion Loss (dB) 1.0 Insertion Loss with Negative Control (-2.7, 0 V) 0.4 0.2 -40 °C 1.6 1.4 15 dB 0 dB 1.2 +25 °C 0.0 0.0 0.5 1.0 1.5 2.0 2.5 1.0 3.0 0.0 FREQUENCY (GHz) 0.5 1.0 1.5 2.0 2.5 3.0 FREQUENCY (GHz) Attenuation with Positive Control (0, +2.7 V) Attenuation with Negative Control (0. –2.7 V) 17 Attenuation (dB) 17 Attenuation (dB) 16 15 -40 °C 14 +25 °C 13 +85 °C 15 14 13 12 12 0.0 16 0.8 0.5 1.0 1.5 2.0 2.5 3.0 1.0 1.2 1.4 1.6 1.8 2.0 2.2 FREQUENCY (GHz) FREQUENCY (GHz) Specifications subject to change without notice. North America: Tel. (800) 366-2266 Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 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, 1 Bit, 15 dB Step, DC - 2.0 MHz AT-267 V 2.00 SOT-25 Package Outline 1,2 D PIN 5 A2 e1 WZ X Y E1 SOT-25 Dimensions E L PIN 5 e c ° A1 A DIM A A1 A2 b c D e e1 E E1 L ° b 1. Dimensions do not include mold flash, protrusion or gate burrs which shall not exceed 0.0098 in (0.25mm) per side. 2. Lead Coplanarity is 0.003 (0.08) max. MIN 0.90 0.30 0.08 0.30 0° MEASUREMENT (mm) NOM 1.15 2.90 basic 0.95 basic 1.90 basic 2.80 basic 1.60 basic 0.60 4° MAX 1.45 0.15 1.30 0.50 0.22 0.45 8° Note: See JEDEC MO-178 VAR AA for additional dimensions and tolerances. Ordering Information Part Number Package AT-267TR Forward Tape and Reel1 AT-267TR-3000 3000 Piece Tape and Reel AT-267SMB Sample Board 1. If specific reel size is required, consult factory for part number assignment. Specifications subject to change without notice. North America: Tel. (800) 366-2266 Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 Visit www.macom.com for additional data sheets and product information. 3