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| Digital Attenuator, 4 Bit, Single Control, 15 dB 0.5 - 2.0 GHz AT-226 AT-226 Digital Attenuator, 4 Bit, Single Control, 15 dB 0.5 - 2.0 GHz Features * * * * Single Control CMOS logic for each bit Attenuation: 1 dB steps to 15 dB Low DC Power Consumtion: 50 uW Low Cost Plastic TSSOP - 16 Package .256 .246 6,5 6,25 TSSOP-16 PIN 16 Description The M/A-COM AT-226 is a 4 bit, 1 dB step GaAs MMIC digital attenuator in a low cost TSSOP-16 surface mount plastic package. The AT-226 is ideally suited for use where high accuracy, very low power consumption and low intermodulation products are required. Typical applications include radio, cellular, wireless LANs, GPS equipment and other gain/level control circuits. The AT-226 is fabricated using mature 1 micron GaAs MESFET process. The process features full chip passivation for increased performance and reliability. .037 .033 0,95 0,85 PIN 1 .169 BSC 4,5 .201 .193 5,11 4,9 .177 .169 4,5 4,29 PIN Configuration Functional Schematic Vs RF1 GND GND GND GND GND GND RF2 P IN 1 6 1,2 Pin No. 1,2,7,8 3 4 5 6 9 10,11,12,13,14,15 16 Function GND VC1 VC2 VC3 VC4 RF2 GND RF1 Description RF Ground Control 1 Control 2 Control 3 Control 4 RF in/out RF Ground RF in/out Truth Table 8 4 2 1 1, 2, 3 VC1 1 1 1 1 0 0 VC2 1 1 1 0 1 0 VC3 1 1 0 1 1 0 VC4 1 0 1 1 1 0 Attenuation (dB) Reference I.L. 1 2 4 8 15 P IN 1 GND GND VC1 VC2 VC3 VC4 GND GND 1. Required external blocking caps shown 2. VS can be applied at RF1 or RF2 using a 10K or greater pull-up resistor. 1. Logic 0 = 0 + 0.2 V 2. Logic 1 = +5 V @ 30 A max. current total 3. VS = +5 V V3.00 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. Digital Attenuator, 4 Bit, Single Control, 15 dB 0.5 - 2.0 GHz AT-226 Electrical Specifications at TA = +25C Parameter Reference Insertion Loss Attenuation Accuracy VSWR Trise,Tfall Ton, Toff P1dB IP2 IP3 Test Conditions 0.5 - 1.0 GHz 1.0 - 2.0 GHz 0.5 - 1.0 GHz 1.0-2.0 GHz 0.5 - 2.0 GHz Units dB dB Min. Typ. 1.3 1.0 Max. 1.6 1.3 (0.25 dB + 5% of Attenuation setting in dB) dB (0.4 dB + 5% of Attenuation setting in dB) dB Input Power Measured Relative to Input Power Two Tone input up to 5dBm, 5MHz Spacing Measured Relative to Input Power Two Tone input up to 5dBm, 5MHz Spacing >0.5 GHz >0.5GHz s s dBm dBm 1.3:1 2.5 1.0 24 80 1.8:1 >0.5GHz dBm 47 Typical Performance Curves 16 14 ATTENUATION (dB) 12 Relative Attenuation 8 6 4 2 0 IL(dB) 10 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 Insertion Loss +85C -40C +25C 0.5 1 1.5 2 2.5 3 0.5 1 FREQUENCY (GHz) 1.5 2 FREQUENCY (GHz) 2.5 3 2 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1 Input VSWR 1 VSWR 15dB TWC* for all states 2, 4dB 2 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1 Output VSWR 1 VSWR TWC* for all states 15dB 2, 4dB 0.5 1 1.5 2 2.5 3 0.5 1 FREQUENCY (GHz) 1.5 2 FREQUENCY (GHz) 2.5 3 1. TWC = Typical worst case over all states 1. TWC = Typical worst case over all states V3.00 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. Digital Attenuator, 4 Bit, Single Control, 15 dB 0.5 - 2.0 GHz AT-226 Typical Performance Curves (Cont'd) 0.15 0.1 0.05 0 -0.05 -0.1 -0.15 -0.2 -0.25 DEVIATION FROM NOMINAL ATTENUATION (dB) Delta ATT +25C to -40C 8dB 2dB 0.6 0.4 0.2 0 Attenuation Accuracy vs Frequency DELTA (dB) 4dB 1dB 15dB -0.2 1dB 2dB 4dB 8dB 15dB -0.4 -0.6 0.5 1 1.5 2 2.5 3 FREQUENCY (GHz) 0.5 1 1.5 2 FREQUENCY (GHz) 2.5 3 0.25 0.2 DELTA (dB) 0.15 0.1 0.05 0 -0.05 -0.1 Delta ATT +25C to+85C 15dB Absolute Maximum Ratings Parameter Maximum Input Power 1 Maximum Ratings 1dB 50 MHz 500 - 2000 MHz 8dB 4dB 2dB +27 dBm +34 dBm +8 V, -1.0 V -40C to +85C -65C to +150C Control Voltage Operating Temperature 2.5 3 0.5 1 1.5 2 FREQUENCY (GHz) Storage Temperature 1. Exceeding these limits may cause permanent damage. V3.00 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. Digital Attenuator, 4 Bit, Single Control, 15 dB 0.5 - 2.0 GHz AT-226 V3.00 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. |
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