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| Digital Attenuator, 1 Bit, 10 dB Step, DC - 2.0 GHz AT-266 AT-266 Digital Attenuator, 1 Bit, 10 dB Step DC - 2.0 GHz Features * * * Single 10 dB Step Low Loss 0.3dB Typ. @ 900 MHz Low Cost Plastic SOT25 Package SOT-25 Plastic Package .114 .008 2,9 0,2 .075 .008 1,90 0,2 + .008 .043 - .004 1,10 + 0,2 - 0,1 .110 .008 2,80 0,2 Description M/A-COM's AT-266 is a 1 bit, 10 dB step GaAs MMIC Digital Attenuator in a low cost SOT-25 surface mount plastic package. The AT-266 is ideally suited for use where high accuracy, very low power consumption and low intermodulation products are required. Typical applications include radio, wireless LANs, GPS equipment and other gain/level control circuits. The AT-266 is a GaAs MMIC using a mature 1 micron process. The process features full chip passivation for increased performance and reliability. .063 .004 1,6 0,1 .008 MIN 0,20 MIN Pin 1 + .004 .006 - .002 0,15 + 0,1 - 0,05 + .004 .031 - .007 0,80 + 0,1 - 0,18 .002 .002 0,05 0,05 + .004 .016 - .002 0,40 + 0,1 - 0,05 Pin Configuration PIN No. 1 2 3 4 5 1. Truth Table Description RF In/Out RF Ground RF In/Out Control Voltage Control Voltage Negative 3 Function RF1 RF2 V1 V2 1 1 MODE (Control) Postive 1 V1 0 0.2V +3 to +8V -VC 0.2 V + VC 0 0.2V -3V to -8V V2 +3 to +8V 0 0.2V +VC -VC 0.2V -3V to -8V 0 0.2V Atten. 10 dB IL 10 dB IL IL 10 dB 1 GND 1 Postive / Negative1,2 Series Capacitors on PINs1, 3 and 5, Shunt Capacitor on PIN 2 are required for Postive Control. 39pF capacitors used for postive control performance curves. 1 1. External DC blocking capactors are required as noted 2. | -VC | + VC 8 V. 3. If negative control is used, DC blocking capacitors are not required on RF Ports. Electrical Specifications TA = 25C Parameter Insertion Loss Insertion Loss Attenuation VSWR IP3 P1dB Trise, Tfall Ton, Toff Transients 0 - 1 GHz 1 - 2 GHz 0 - 1 GHz 1 - 2 GHz 0 - 2 GHz Test Conditions Units dB dB dB dB dBm dBm ns ns mV Min. Typ. 0.3 0.5 10 10 1.4:1 Max. 0.45 0.7 0.4 0.5 1.5:1 2 Tone @ 0 dBm, 5 MHz spacing 1 GHz 10% to 90% RF, 90% to 10% RF 50% Control to 90% RF, 50% Control to 10% RF In Band 42 23 50 28 5 10 6 20 25 10 V2.00 1. All measurements at 1.0 GHz, -3 Volts control unless otherwise specified. M/A-COM Division of AMP Incorporated 3 North America: Tel. (800) 366-2266, Fax (800) 618-8883 3 Asia/Pacific: Tel.+85 2 2111 8088, Fax +85 2 2111 8087 3 Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 www.macom.com AMP and Connecting at a Higher Level are trademarks. Specifications subject to change without notice. Digital Attenuator, 1 Bit, 10 dB Step, DC - 2.0 GHz AT-266 Ordering Information Part Number AT-266 AT-266TR AT-266RTR Package SOT-25 Plastic Package Forward Tape and Reel 1 1 Absolute Maximum Ratings Parameter Max. Input Power 50 MHz 500 - 2000 MHz Control Voltage Operating Temperature Storage Temperature 1 Absolute Maximum +27 dBm +34 dBm +5V, -8.5V -40C to +85C -65C to +150C Reverse Tape and Reel 1. Refer to Application Note M513 for reel size information. 1. Operation of this device above any one of these parameters may cause permanent damage. Typical Performance Curves Insertion Loss vs. Frequency Over Temperature (Negative Control) 1 0.9 INSERTION LOSS (dB) 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 0.5 1 1.5 FREGUENCY (GHz) 2 2.5 3 +85C +25C -40C INSERTION LOSS (dB) 0.8 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 0.5 1 1.5 FREGUENCY (GHz) 2 2.5 3 -40C +85C +25C Insertion Loss vs. Frequency Over Temperature (Postive Control) Relative Attenuation vs. Frequency Over Temperature (Posative Control) 11 10.8 INSERTION LOSS (dB) 10.4 10.2 10 9.8 9.6 9.4 9.2 9 0 0.5 1 1.5 FREGUENCY (GHz) 2 2.5 3 +85C +25C INSERTION LOSS (dB) 11 10.8 10.6 10.4 10.2 10 9.8 9.6 9.4 9.2 9 0 Relative Attenuation vs. Frequency Over Temperature (Negative Control) 10.6 -40C -40C +25C +85C 0.5 1 1.5 FREGUENCY (GHz) 2 2.5 3 Return Loss vs. Frequency (Reference State) 40 35 RETURNLOSS (dB) RETURNLOSS (dB) 30 25 20 15 10 5 0 0 0.5 1 1.5 FREQUENCY (GHz) 2 2.5 3 Positive Control Negative Control 35 30 25 20 15 10 Return Loss vs. Frequency (10 dB State) Negative Control Positive Control 5 0 0 0.5 1 1.5 FREQUENCY (GHz) V2.00 2 2.5 3 M/A-COM Division of AMP Incorporated 3 North America: Tel. (800) 366-2266, Fax (800) 618-8883 3 Asia/Pacific: Tel.+85 2 2111 8088, Fax +85 2 2111 8087 3 Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 www.macom.com AMP and Connecting at a Higher Level are trademarks. Specifications subject to change without notice. |
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