AT90-1263 Digital Attenuator, 31 dB, 5-Bit, TTL Driver, DC-4.0 GHz CSP-1 Features n n n n n n n V 6.00 Attenuation: 1.0dB Steps to 31dB Single Positive Supply Contains internal DC to DC converter Low DC Power Consumption Small Footprint, JEDEC Package Integral TTL Driver 50 ohm Impedance Description M/A-COM's AT90-1263 is a GaAs FET 5-bit digital attenuator with integral TTL driver. Step size is 1.0 dB providing 31dB total attenuation range. This device is in an FQFP-N plastic surface mount package. The AT90-1263 is ideally suited for use where accuracy, fast speed, very low power consumption and low costs are required. Electrical Specifications TA = +25°C Parameter Test Conditions Frequency Units Min Typical Max Insertion Loss — DC - 4.0 GHz dB — 3.5 3.8 Attenuation Accuracy Individual Bits 1-2-4-8-16 dB DC - 3.0 GHz DC - 4.0 GHz DC - 4.0 GHz dB dB dB — — — — — — ±(.3 +5% of atten setting) ±(.4 +6% of atten setting) ±(.5 +7% of atten setting) Any Combination of Bits 1 to 31 dB VSWR Full Range DC - 4.0 GHz Ratio — 2.0:1 2.2:1 Switching Speed 50% Cntl to 90%/10% RF 10% to 90% or 90% to 10% — — nS nS — — 75 20 150 50 1 dB Compression — — 50 MHz 0.5 - 4.0 GHz dBm dBm — — +21 +29 — — Input IP3 Two-tone inputs up to +5 dBm 50 MHz 0.5-4.0 GHz dB dB — — +35 +48 — — +Vcc — — V 4.75 5.0 5.25 Logic “0” Sink Current is 20 µA max. — V 0.0 — 0.8 Logic “1” Source Current is 20 µA max. — V 2.0 — 5.0 Icc Vcc min to max, Logic “0” or “1” — mA — 6 10 Digital Attenuator, 31 dB, 5-Bit, TTL Driver, DC - 4.0 GHz AT90-1263 V 6.00 Recommended PCB Layout 7 Pin Configuration 1. 2. 3. 4. 5. 6. Pin # Function Pin # Function 1 GND 17 NC 2 C16 18 NC 3 C8 19 +Vcc2 4 C4 20 NC 5 C2 21 Cp4 6 C1 22 NC 7 8 9 GND NC NC 23 24 25 Cp4 NC -Vee3 10 NC1 26 GND 11 GND 27 RF2 12 RF1 28 GND 13 14 GND NC 29 30 NC1 -Vee3,5 15 NC 31 NC 16 NC 32 +Vcc2,6 Pins 10 & 29 must be isolated Pin 19 must be connected to Pin 32 Pin 25 must be connected to Pin 30 .01µF cap must be connected between Pins 21 and 23 -Vee is produced internally and requires a .1µF cap to GND +Vcc requires a .1µF cap to GND Absolute Maximum Ratings 8 Parameter Absolute Maximum 7. Application Note C2083 is available on line at www.macom.com Truth Table C16 0 C8 0 C4 0 C2 0 C1 0 Attenuation Loss, Reference 0 0 0 0 1 1.0 dB 0 0 0 1 0 2.0 dB 0 0 1 0 0 4.0 dB 0 1 0 0 0 8.0 dB Max. Input Power 0.05 GHz 0.5 - 4.0 GHz +27 dBm +34 dBm +Vcc +5.5V 1 0 0 0 0 16.0 dB -0.5 to +Vcc + 0.5V 1 1 1 1 1 31.0 dB Logic Voltages 9 Operating Temperature -40°C to +85°C Storage Temperature -65°C to +125°C 0 = TTL Low; 1 = TTL High 8. Operation of this device above any one of these parameters may cause permanent damange. 9. Standard CMOS TTL interface, latch-up will occur if logic signal is applied prior to power supply. Specifications subject to change without notice. n North America: Tel. (800) 366-2266 n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 n 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, 31 dB, 5-Bit, TTL Driver, DC - 4.0 GHz AT90-1263 V 6.00 Typical Performance Curves Insertion Loss VSWR @ Insertion Loss Input 3.0 2.00 2.0 1.00 1.0 0 1000 2000 3000 0 4000 1000 Attenuation Error, 1 dB Bit 3000 4000 Attenuation Error, 2 dB Bit 0.3 0.3 0.2 0.2 Error (dB) Error (dB) 2000 Frequency (MHz) Frequency (MHz) 0.1 0 0.1 0 -0.1 -0.1 0 1000 2000 3000 4000 0 1000 Frequency (MHz) 2000 3000 4000 Frequency (MHz) Attenuation Error, 8 dB Bit Attenuation Error, 4 dB Bit 0.7 0.7 0.5 0.5 Error (dB) Error (dB) Output 3.00 VSWR Loss (dB) 4.0 0.3 0.3 0.1 0.1 -0.1 -0.1 0 1000 2000 3000 4000 Frequency (MHz) Specifications subject to change without notice. n North America: Tel. (800) 366-2266 n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 Visit www.macom.com for additional data sheets and product information. 0 1000 2000 3000 4000 Frequency (MHz) 3 Digital Attenuator, 31 dB, 5-Bit, TTL Driver, DC - 4.0 GHz AT90-1263 V 6.00 Typical Performance Curves Attenuation Error, Max. Attenuation 1.5 1.5 0.5 0.5 Error (dB) Error (dB) Attenuation Error, 16 dB Bit -0.5 -0.5 -1.5 -1.5 0 1000 2000 3000 0 4000 1000 Frequency (MHz) VSWR, 1 dB Bit Output 2000 3000 4000 3000 4000 3000 4000 Frequency (MHz) VSWR, 2 dB Bit Input Input 1.8 Output 1.6 1.6 VSWR VSWR 1.4 1.4 1.2 1.2 1.0 1.0 0 1000 2000 3000 0 4000 1000 2000 Frequency (MHz) Frequency (MHz) VSWR, 8 dB Bit VSWR, 4 dB Bit Input Input Output 1.6 1.4 1.4 Output VSWR VSWR 1.6 1.2 1.2 1.0 1.0 0 1000 2000 3000 4000 Frequency (MHz) Specifications subject to change without notice. n North America: Tel. (800) 366-2266 n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 Visit www.macom.com for additional data sheets and product information. 0 1000 2000 Frequency (MHz) 4 Digital Attenuator, 31 dB, 5-Bit, TTL Driver, DC - 4.0 GHz AT90-1263 V 6.00 Typical Performance Curves VSWR, Maximum Attenuation VSWR, 16 dB Bit Input Input Output 1.6 1.4 1.4 VSWR VSWR 1.6 Output 1.2 1.2 1.0 1.0 0 1000 2000 3000 4000 Frequency (MHz) 0 1000 2000 3000 4000 Frequency (MHz) Ordering Information Part Number Package AT90-1263 Bulk Packaging AT90-1263TR Tape and Reel (1K Reel) AT90-1263-TB Units Mounted on Test Board Specifications subject to change without notice. n North America: Tel. (800) 366-2266 n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298 n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020 Visit www.macom.com for additional data sheets and product information. 5