AT65-0233 Digital Attenuator, 30 dB, 4-Bit, TTL Driver, DC-3.0 GHz Features n n n n n V 5.00 SO-16 Attenuation: 2.0 dB steps to 30 dB Low DC Power Consumption Integral TTL Driver 50 Ohm Impedance Temperature Stability: ±0.18 dB from -55°C to +85°C Typ. Description M/A-COM’s AT65-0233 is a GaAs FET 4-bit digital attenuator with a 2.0 dB minimum step size and a 30 dB total attenuation range. This device is in a SOIC-16 plastic surface mount package. The AT65-0233 is ideally suited for use where accuracy, fast speed, very low power consumption and low costs are required. Typical applications include dynamic range setting in precision receiver circuits and other gain/leveling control circuits. Electrical Specifications: TA = 25°C Parameter Test Conditions Frequency Units Min. Typ. Max. Insertion Loss — DC - 0.5 GHz DC - 2.0 GHz DC - 3.0 GHz dB dB dB — — — 1.7 2.3 2.6 2.0 2.7 3.1 Attenuation Accuracy Any Bit or Combination of Bits DC - 3.0 GHz dB VSWR Full Range DC - 3.0 GHz Ratio — — 1.7:1 10% to 90% 50% Cntl to 90%/10% RF In-Band Input Power 0.05 GHz Input Power 0.5 - 3.0 GHz Two-tone inputs up to +5 dBm 0.05 GHz 0.5 - 3.0 GHz Two-tone inputs up to +5 dBm 0.05 GHz 0.5 - 3.0 GHz — — — — Logic (0) TTL — Logic (1) TTL — 0 to 0.8 V — 2.0 to 5.0 V — VCC = 4.5 to 5.5 V — nS nS mV dBm dBm dBm dBm dBm dBm V V V V µA µA mA — — — — — — — — — 4.5 -8.0 0.0 2.0 — — — 10 30 35 +20 +28 +40 +50 +45 +68 5.0 -5.0 — — — — — 50 150 — — — — — — — 5.5 -4.75 0.8 5.0 20 20 4.0 mA — — -1 Trise, Tfall Ton, Toff Transients 1 dB Compression Input IP3 Input IP2 VCC -VEE Vctl Vctl Input Leakage Current (Low) Input Leakage Current (High) Icc -Iee VEE = -5.0 to –8.0 V — ± (.4 + 8% of attenuation) Digital Attenuator, 30 dB, 4-Bit, TTL Driver, DC - 3.0 GHz AT65-0233 V 5.00 Absolute Maximum Ratings 1 Pin Configuration Pin # Function Pin # Function Parameter Absolute Maximum Max. Input Power 0.05 GHz 0.5 - 3.0 GHz +27 dBm +34 dBm +Vcc +5.5V 1 GND 9 C2 2 RF1 10 C1 3 GND 11 GND 4 N/C 12 GND 5 Vee 13 N/C 6 Vcc 14 GND 7 C4 15 RF2 8 C3 16 GND -Vee Control Voltage -8.5V 2 -0.5 to Vcc + 0.5V Operating Temperature -40°C to +85°C Storage Temperature -65°C to +125°C N/C = No Connection 1. Operation of this device above any one of these parameters may cause permanent damage. 2. Standard CMOS TTL interface, latch-up will occur if logic signal is applied prior to power supply. Truth Table Typical Performance Curves C2 C3 C4 Attenuation 0 0 0 0 Loss, Reference 1 0 0 0 2.0 dB 0 1 0 0 4.0 dB 0 0 1 0 8.0 dB 0 0 0 1 16.0 dB 1 1 1 1 30.0 dB Typical Insertion Loss (dB) 3 Loss (dB) C1 2 1 0 = TTL Low; 1 = TTL High 0 0 0.5 1 1.5 2 2.5 3 Frequency (GHz) Attenuation Accuracy, 4 dB 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 0 0.5 1 1.5 2 2.5 3 Frequency (GHz) 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. Deviation from Nom. Atten. (dB) Deviation from Nom. Atten. (dB) Attenuation Accuracy, 2 dB 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 0 0.5 1 1.5 2 2.5 3 Frequency (GHz) 2 Digital Attenuator, 30 dB, 4-Bit, TTL Driver, DC - 3.0 GHz AT65-0233 V 5.00 Typical Performance Curves Attenuation Accuracy, 16 dB Deviation from Nom. Atten. (dB) 0.4 0.2 0 -0.2 -0.4 0 0.5 1 1.5 2 2.5 3 Deviation from Nom. Atten. (dB) Attenuation Accuracy, 8 dB 0.8 0.4 0 -0.4 -0.8 0 0.5 1.5 2 2.5 3 Frequency (GHz) Frequency (GHz) Typical RF1 VSWR Attenuation Accuracy, 30 dB 2 & 4 dB Insertion Loss 8 dB 16 & 30 dB 1.4 0.8 0.4 1.3 0 -0.4 VSWR Deviation from Nom. Atten. (dB) 1 -0.8 1.2 -1.2 1.1 -1.6 -2 1 -2.4 0 0.5 1 1.5 2 2.5 3 0 0.5 Typical RF2 VSWR Insertion Loss 16 dB 1.5 2 2.5 3 Ordering Information 30 dB 2, 4, & 8 dB 1.4 1.3 VSWR 1 Frequency (GHz) Frequency (GHz) Part Number Package AT65-0233 SOIC-16 Lead Plastic AT65-0233TR Tape and Reel (1K Reel) AT65-0233-TB Unit mounted on a test board 1.2 1.1 1 0 0.5 1 1.5 2 2.5 3 Frequency (GHz) 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. 3