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| Digital Attenuator, 1 Bit, 15 dB Step DC - 2.0 GHz V 2.00 AT-267 Features Functional Schematic V2 PIN 5 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 V1 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. 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. PIN 1 RF1 GND RF2 Positive Control Voltage V2 5 V1 4 Truth Table 1, 2, 3 Mode (Control) Positive1 Postitive/ Negative1,2 Negative3 V1 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 V2 +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 Atten 15 dB IL 15 dB IL IL 15 dB 1 39 pF 39 pF 2 3 39 pF RF1 GND RF2 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 Operating Temperature Storage Temperature Absolute Maximum +21 dBm -8 V -40 C to +85 C -65 C to +150 C 1. Exceeding any one or a combination of these limits may cause permanent damage. Digital Attenuator, 1 Bit, 15 dB Step, DC - 2.0 MHz Electrical Specifications: TA = +25 C, VCTRL = +2.7 Volts1= Parameter Insertion Loss Attenuation VSWR Input IP3 P1dB Leakage Current Trise, Tfall Ton, Toff Transients 10% to 90% RF, 90% to 10% RF 50% Control to 90% RF, Control to 10% RF In Band Test Conditions 1.0 GHz 2.0 GHz 1.0 GHz 2.0 GHz 1.0 GHz 2.0 GHz 1.0 GHz (0 dBm), Attenuator OFF Attenuator ON 1 GHz, Attenuator OFF Attenuator ON dBm dBm A nS nS mV 150 150 10 40 40 19 13 43 45 22 17 Units dB dB dB dB 15 14 Min. Typ. 0.3 0.4 15.5 14.5 AT-267 V 2.00 Max. 0.4 0.5 16 15 1.2:1 1.3:1 10 1. All measurements in a 50- system unless otherwise specified. The RF ports must be blocked out side of the package from ground or any other voltage. Typical Performance Curves Insertion Loss with Negative Control (-2.7, 0 V) 2.0 +85 C 1.0 VSWR, 0 and 15 dB States with Negative Control (-2.7 V) +25 C 1.8 Insertion Loss (dB) 0.8 0.6 0.4 0.2 VSWR 1.6 1.4 1.2 15 dB 0 dB -40 C +25 C 0.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 1.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 FREQUENCY (GHz) FREQUENCY (GHz) Attenuation with Negative Control (0. -2.7 V) 17 Attenuation with Positive Control (0, +2.7 V) 17 Attenuation (dB) 16 16 15 14 13 12 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 Attenuation (dB) 15 -40 C 14 13 12 +25 C +85 C 0.0 0.5 1.0 1.5 2.0 2.5 3.0 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 SOT-25 Package Outline PIN 5 AT-267 V 2.00 1,2 SOT-25 Dimensions A2 D e1 E1 WZ X Y E L PIN 5 e A b A1 c DIM A A1 A2 b c D e e1 E E1 L 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 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. Note: See JEDEC MO-178 VAR AA for additional dimensions and tolerances. Ordering Information Part Number AT-267TR AT-267TR-3000 AT-267SMB Package Forward Tape and Reel1 3000 Piece Tape and Reel 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 |
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