AT20-0107 Digital Attenuator, 31.5 dB, 6-Bit, TTL Driver, DC - 2.0 GHz Features n n n n n n n V 4.00 CR-13 Attenuation: 0.5 dB Steps to 31.5 dB1 Temperature Stability: ±0.18 dB from –40ºC to +85ºC Typ. Low DC Power Consumption Surface Mount Package Integral TTL Driver High Intercept Point Low Cost/High Performance Description M/A-COM's AT20-0107 is a GaAs FET 6-bit digital attenuator with a 0.5 dB minimum step size and a 31.5 dB total attenuation. This attenuator and integral TTL driver is in a ceramic 24-lead surface mount package. The AT200107 is ideally suited for use where accuracy, fast speed, very low power consumption and low intermodulation products are required. Typical applications include dynamic range setting in precision receiver circuits and other gain/ leveling control circuits. Available with enhanced performance as fully hermetic version. Environmentally screenable as P/N AT-107. Electrical Specifications2: TA = +25°C Parameter Test Conditions Frequency Units Min Typ. Max — DC - 2.0 GHz dB — 3.2 3.8 Any Bit or Combination of Bits DC - 2.0 GHz dB — — +(.3 +7% of atten.) -(.2 +1% of atten.) VSWR Full Range DC - 2.0 GHz Ratio — — 1.8:1 Trise, Tfall Ton, Toff Transients 10% to 90% 50% Control to 90%/10% RF In-band (peak to peak) — — — nS nS mV — — — 50 150 50 — — — 1 dB Compression 5 Input Power Input Power 50 MHz 0.5 - 2.0 GHz dBm dBm — — +21 +29 — — Input IP3 5 Two Tone Inputs up to +5 dBm 50 MHz 0.5 - 2.0 GHz dB dB — — +35 +48 — — Input IP2 5 Two Tone Inputs up to +5 dBm 50 MHz 0.5 - 2.0 GHz dB dB — — +75 +79 — — Vcc -Vee — — — — V V 4.5 -8.0 5.0 — 5.5 -5.0 Icc Vcc = 4.5 to 5.5V — mA — — 6.0 -Iee -Vee = -5.0 to -8.0V — mA — — 1.0 Insertion Loss 3,4 Attenuation Accuracy 1. 2. 3. 4. 5. Above reference insertion loss. All specifications apply when operated with bias voltages of +5V for VCC and –5.0 V to –8.0 V for VEE and 50O impedance at all ports unless otherwise stated. This attenuator is guaranteed monotonic. For the attenuator to meet the guaranteed specifications, it is necessary to have a DC return on either RF1 or RF2. The DC return can be either a 10KO resistor, or an RF choke. VEE = -5 V for the typical numbers given. Digital Attenuator, 31.5 dB, 6-Bit, TTL Driver, DC - 2.0 GHz AT20-0107 V 4.00 Absolute Maximum Ratings 6 Truth Table C16 C8 C4 C2 C1 C0.5 Attenuation 0 0 0 0 0 0 Loss, Reference 0 0 0 0 0 1 0.5 dB +5.5V 0 0 0 0 1 0 1.0 dB -Vee -8.5V 0 0 0 1 0 0 2.0 dB Control Voltage -0.5V to VCC +0.5V 0 0 1 0 0 0 4.0 dB Operating Temperature -40°C to +125°C 0 1 0 0 0 0 8.0 dB -65°C to +150°C 1 0 0 0 0 0 16.0 dB 1 1 1 1 1 1 31.5 dB Parameter Absolute Maximum Max. Input Power 0.05 GHz 0.5 - 2.0 GHz +27 dBm +34 dBm +Vcc Storage Temperature 6. Operation of this device above any one of these parameters may cause permanent damange. Functional Schematic (Top View) 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 = TTL Low; 1 = TTL High PCB Layout 2 Digital Attenuator, 31.5 dB, 6-Bit, TTL Driver, DC - 2.0 GHz AT20-0107 V 4.00 Typical Performance Curves Insertion Loss vs. Frequency +85 °C +25 °C Attenuation Accuracy vs. Frequency 1 dB -40 °C 2 dB 0.5 dB 4 dB 0.6 4 0.4 Deviation (dB) Loss (dB) 3 2 1 0.2 0 -0.2 -0.4 -0.6 0 0 0.5 1 1.5 0 2 0.5 2 RF1 VSWR vs. Frequency Attenuation Accuracy vs. Frequency 8 dB 1.5 Frequency (GHz) Frequency (GHz) 16 dB 1 31.5 dB Loss & 0.5 dB 0.8 2 dB 1 dB 4 dB 8 & 16 dB 2 1.8 0.4 Deviation (dB) Deviation (dB) 0.6 0.2 0 -0.2 -0.4 1.6 1.4 1.2 -0.6 1 -0.8 0 0.5 1 1.5 2 0 0.5 Frequency (GHz) 4 dB 8 dB Loss & 0.5 dB 2 16 dB 2 Deviation (dB) 1.5 Ordering Information RF2 VSWR vs. Frequency 1 & 2 dB 1 Frequency (GHz) Part Number Package 1.8 AT20-0107 Bulk Packaging 1.6 AT20-0107TR Tape and Reel (1K Reel) 1.4 AT20-0107-TB Unit mounted on a test board 1.2 1 0 0.5 1 1.5 2 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