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 SOT-25 Plastic Package Features • • • Single 10 dB Step Low Loss 0.3dB Typ. @ 900 MHz Low Cost Plastic SOT25 Package .114 ± .008 2,9 ± 0,2 .075 ± .008 1,90 ± 0,2 + .008 .043 - .004 1,10 + 0,2 - 0,1 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. 1. Function Description 1 RF In/Out 2 GND 1 RF Ground 3 RF2 1 RF In/Out 4 V1 Control Voltage 5 V2 Control Voltage 1 RF1 .008 MIN 0,20 MIN Pin 1 + .004 .031 - .007 0,80 + 0,1 - 0,18 + .004 .006 - .002 0,15 + 0,1 - 0,05 .002 ± .002 0,05 ± 0,05 + .004 .016 - .002 0,40 + 0,1 - 0,05 Truth Table Pin Configuration PIN No. .110 ± .008 2,80 ± 0,2 .063 ± .004 1,6 ± 0,1 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. Electrical Specifications TA = 25°C Parameter MODE (Control) Postive 1 Postive / Negative1,2 3 Negative V1 V2 Atten. 0 ± 0.2V +3 to +8V +3 to +8V 0 ± 0.2V 10 dB IL -VC ± 0.2 V + VC +VC -VC ± 0.2V 10 dB IL 0 ± 0.2V -3V to -8V -3V to -8V 0 ± 0.2V IL 10 dB 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. 1 Test Conditions Units Min. Typ. Max. Insertion Loss 0 - 1 GHz dB 0.3 0.45 Insertion Loss 1 - 2 GHz dB 0.5 0.7 Attenuation 0 - 1 GHz dB 10 ±0.4 1 - 2 GHz dB 10 ±0.5 1.4:1 1.5:1 VSWR 0 - 2 GHz IP3 2 Tone @ 0 dBm, 5 MHz spacing dBm 42 50 P1dB 1 GHz dBm 23 28 Trise, Tfall 10% to 90% RF, 90% to 10% RF ns 5 20 Ton, Toff 50% Control to 90% RF, 50% Control to 10% RF ns 10 25 Transients In Band mV 6 10 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. V2.00 Digital Attenuator, 1 Bit, 10 dB Step, DC - 2.0 GHz AT-266 1 Ordering Information Absolute Maximum Ratings Part Number Parameter Package AT-266 SOT-25 Plastic Package AT-266TR Forward Tape and Reel AT-266RTR Reverse Tape and Reel Absolute Maximum Max. Input Power 50 MHz 1 +27 dBm 500 - 2000 MHz 1 +34 dBm Control Voltage 1. Refer to Application Note M513 for reel size information. +5V, -8.5V Operating Temperature -40°C to +85°C Storage Temperature -65°C to +150°C 1. Operation of this device above any one of these parameters may cause permanent damage. Typical Performance Curves Insertion Loss vs. Frequency Over Temperature (Postive Control) Insertion Loss vs. Frequency Over Temperature (Negative Control) 1 1 0.9 0.8 0.7 0.6 0.5 +25°C +85°C 0.4 0.8 INSERTION LOSS (dB) INSERTION LOSS (dB) 0.9 -40°C 0.3 0.2 0.7 +85°C 0.6 0.4 0.3 -40°C 0.2 0.1 0.1 0 0 0.5 1 1.5 2 2.5 0 3 0 0.5 1 FREGUENCY (GHz) 11 10.8 10.6 INSERTION LOSS (dB) INSERTION LOSS (dB) 11 -40°C 10.2 +25°C 10 9.8 9.6 9.4 2 2.5 3 Relative Attenuation vs. Frequency Over Temperature (Negative Control) 10.8 10.4 1.5 FREGUENCY (GHz) Relative Attenuation vs. Frequency Over Temperature (Posative Control) +85°C 10.6 10.4 -40°C 10.2 9.2 10 +25°C 9.8 9.6 +85°C 9.4 9.2 9 9 0 0.5 1 1.5 2 2.5 0 3 0.5 1 Return Loss vs. Frequency (Reference State) 35 35 30 RETURNLOSS (dB) 30 Negative Control 20 15 Positive Control 10 2 2.5 3 Return Loss vs. Frequency (10 dB State) 40 25 1.5 FREGUENCY (GHz) FREGUENCY (GHz) RETURNLOSS (dB) +25°C 0.5 25 20 Negative Control 15 10 Positive Control 5 5 0 0 0 0.5 1 1.5 2 2.5 FREQUENCY (GHz) 3 0 0.5 1 1.5 2 2.5 3 FREQUENCY (GHz) V2.00 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.