AT90-1106 Digital Attenuator, 50 dB, 6-Bit, TTL Driver, DC-2.4 GHz CSP-1 Features n n n n n n n V 5.00 Attenuation: 1 dB Steps to 50 dB 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 AT90-1106 is a GaAs FET 6-bit digital attenuator with integral TTL driver. Step size is 1 dB providing a 50 dB total attenuation range. This device is in a FQFP-N plastic surface mount package. The AT90-1106 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 - 2.4 GHz dB — 5.5 6.0 Attenuation Accuracy Individual Bits 1-2-4-8-16-32 dB Any Combination of Bits 1 to 50 dB DC - 2.4 GHz DC - 2.4 GHz dB dB — — — — ±(.3 +5% of atten setting) ±(.5 +8% of atten setting) VSWR Full Range DC - 2.4 GHz Ratio — 1.8:1 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 - 2.40 GHz dBm dBm — — +21 +29 — — Input IP3 Two-tone inputs up to +5 dBm 50 MHz 0.5-2.4 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, 50 dB, 6-Bit, TTL Driver, DC - 2.4 GHz AT90-1106 V 5.00 Pin Configuration Recommended PCB Layout 7 Pin # Function Pin # Function 1 C16 17 NC 2 C8 18 NC 3 C4 19 +Vcc2 4 C2 20 NC 5 C1 21 Cp4 6 C32 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 1. 2. 3. 4. 5. 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 6. Truth Table 7. Application Note C2083 is available on line at www.macom.com Absolute Maximum Ratings 8 Parameter Absolute Maximum Max. Input Power 0.05 GHz 0.5 - 2.4 GHz +27 dBm +34 dBm C32 C16 C8 C4 C2 C1 Attenuation 0 0 0 0 0 0 Loss, Reference 0 0 0 0 0 1 1.0 dB 0 0 0 0 1 0 2.0 dB Operating Temperature -40°C to +85°C 0 0 0 1 0 0 4.0 dB Storage Temperature -65°C to +125°C 0 0 0 1 1 0 0 0 0 0 0 0 8.0 dB 16.0 dB 1 0 0 0 0 0 32.0 dB 1 1 0 0 1 0 50.0 dB 0 = TTL Low; 1 = TTL High 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. +Vcc Logic Voltages +5.5V 9 -0.5 to +Vcc + 0.5V 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. 2 Digital Attenuator, 50 dB, 6-Bit, TTL Driver, DC - 2.4 GHz AT90-1106 V 5.00 Typical Performance Curves VSWR @ Insertion Loss Insertion Loss Output Input 2.2 6.0 VSWR Loss (dB) 1.9 5.0 1.6 4.0 1.3 3.0 1.0 0 400 800 1200 1600 2000 2400 0 400 Frequency (MHz) 1600 2000 2400 Attenuation Error, 2 dB Bit 0.2 Attenuation Error (dB) 0.2 Attenuation Error (dB) 1200 Frequency (MHz) Attenuation Error, 1 dB Bit 0.1 0.0 -0.1 -0.2 0.1 0.0 -0.1 0 400 800 1200 1600 2000 0 2400 400 800 1200 1600 2000 2400 2000 2400 Frequency (MHz) Frequency (MHz) Attenuation Error, 8 dB Bit Attenuation Error, 4 dB Bit 0.4 Attenuation Error (dB) 0.4 Attenuation Error (dB) 800 0.3 0.2 0.1 0.0 0.3 0.2 0.1 0.0 -0.1 -0.2 -0.1 0 400 800 1200 1600 2000 2400 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. 0 400 800 1200 1600 Frequency (MHz) 3 Digital Attenuator, 50 dB, 6-Bit, TTL Driver, DC - 2.4 GHz AT90-1106 V 5.00 Typical Performance Curves Attenuation Error, 32 dB Bit Attenuation Error, 16 dB Bit 1.0 Attenuation Error (dB) Attenuation Error (dB) 1.0 0.6 0.2 -0.2 -0.6 0.6 0.2 -0.2 -0.6 0 400 800 1200 1600 2000 2400 0 400 Frequency (MHz) 800 1200 1600 Attenuation Error, Max. Attenuation Input Output 1.8 1.6 0.5 VSWR Attenuation Error (dB) 2400 VSWR, 1 dB Bit 2.5 1.4 -1.5 1.2 1.0 -3.5 0 400 800 1200 1600 2000 0 2400 400 Frequency (MHz) 800 1200 1600 2000 2400 Frequency (MHz) VSWR, 4 dB Bit VSWR, 2 dB Bit Input Output 1.8 1.8 1.6 1.6 VSWR VSWR 2000 Frequency (MHz) 1.4 Output Input 1.4 1.2 1.2 1.0 1.0 0 400 800 1200 1600 2000 2400 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. 0 400 800 1200 1600 2000 2400 Frequency (MHz) 4 Digital Attenuator, 50 dB, 6-Bit, TTL Driver, DC - 2.4 GHz AT90-1106 V 5.00 Typical Performance Curves VSWR, 8 dB Bit VSWR, 16 dB Bit Output Input Input 1.8 Output 1.6 1.6 VSWR VSWR 1.4 1.4 1.2 1.2 1.0 1.0 0 400 800 1200 1600 2000 2400 0 400 800 Frequency (MHz) 2000 2400 Output Input 1.60 1.6 1.40 1.4 Output VSWR VSWR 1600 VSWR, Maximum Attenuation VSWR, 32 dB Bit Input 1200 Frequency (MHz) 1.2 1.20 1.0 1.00 0 400 800 1200 1600 2000 0 2400 400 800 1200 1600 2000 2400 Frequency (MHz) Frequency (MHz) Maximum IP3 over Temperature Range and Attenuation @ 950 MHz Maximum IP3 over Temperature Range and Attenuation @ 50 MHz 50 40 40 IP3 IP3 50 30 30 20 Loss 20 1 2 4 8 16 32 50 Attenuation (dB) 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. Loss 1 2 4 8 16 32 50 Attenuation (dB) 5 Digital Attenuator, 50 dB, 6-Bit, TTL Driver, DC - 2.4 GHz AT90-1106 V 5.00 Typical Performance Curves Maximum IP3 over Temperature Range and Attenuation @ 1900 MHz 50 IP3 40 Ordering Information Part Number Package AT90-1106 Bulk Packaging AT90-1106TR Tape and Reel (1K Reel) AT90-1106-TB Units Mounted on Test Board 30 20 Loss 1 2 4 8 16 32 50 Attenuation (dB) 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. 6