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| Digital Attenuator, 31.5 dB, 6-Bit, TTL Driver, DC - 2 GHz V 4.00 AT-107 Features n Attenuation: 1 dB steps to 31.5 dB n Temperature Stability: 0.18 dB from -55C to +85C n n n n CR-13 Typical Low DC Power Consumption Hermetic Surface Mount Package Integral TTL Driver 50 Ohm Nominal Impedance Description M/A-COM's AT-107 is a GaAs FET 6-bit digital attenuator with a 1 dB minimum step size and 31.5 dB total attenuation. This attenuator and integral TTL driver is in a hermetically sealed ceramic 24-lead surface mount package. The AT-107 is ideally suited for use where accuracy, fast switching, 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. Environmental screening is available. Contact the factory for information. Electrical Specifications: TA = -55C to +85C 1 Parameter Reference Insertion Loss Test Conditions -- Frequency DC - 0.5 GHz DC - 1.0 GHz DC - 2.0 GHz DC - 1.0 GHz DC - 2.0 GHz DC - 1.0 GHz DC - 2.0 GHz VSWR Trise, Tfall Ton, Toff Transients 1 dB Compression Input IP3 Input IP2 -- 10% to 90% 50% Control to 90/10% RF In-Band (peak-peak) Input Power Input Power For two-tone Input Power Up to +5 dBm For two-tone Input Power Up to +5 dBm DC - 2.0 GHz -- -- -- 0.05 GHz 0.5 - 2.0 GHz 0.05 GHz 0.5 - 2.0 GHz 0.05 GHz 0.5 - 2.0 GHz Units dB dB dB Min -- -- -- Typ -- -- -- Max 3.2 3.6 4.0 Attenuation Accuracy 2 Any Single Bit Any Combination of Bits (0.15 +3% of atten. setting in dB) dB (0.2 +3% of atten. setting in dB) dB (0.2 +3% of atten. setting in dB) dB or 0.4 dB, whichever is greater (0.2 +3% of atten. setting in dB) dB or 0.4 dB, whichever is greater Ratio ns ns mV dBm dBm dBm dBm dBm dBm -- -- -- -- -- -- -- -- -- -- -- 9 45 40 +21 +29 +35 +48 +75 +79 1.8:1 -- -- -- -- -- -- -- -- -- 1. All specifications apply when operated with bias voltages of +5V for Vcc and -5.0V for Vee. 2. This attenuator is guaranteed monotonic. Digital Attenuator, 31.5 dB, 6-Bit, TTL Driver, DC - 2 GHz AT-107 V 4.00 Electrical Specifications: TA = -55C to +85C Parameter Vcc Vee Icc Iee Vctl Vctl Input Leakage Current (Low) Input Leakage Current (High) Test Conditions -- -- Vcc = 4.5 to 5.5V Vctl = 0 to 0.8V, or Vcc -2.1V to Vcc Vee = -5.0 to -8.0V Logic 0 (TTL) Logic 1 (TTL) 0 to 0.8V 2.0 to 5.0V Frequency -- -- -- -- -- -- -- -- Units V V mA mA V V A A Min 4.5 -8.0 -- -- 0.0 2.0 -- -- Typ 5.0 -- -- -- -- -- -- -- Max 5.5 -5.0 6.0 1.0 0.8 5.0 1.0 1.0 Absolute Maximum Ratings 3 Parameter Max Input Power 0.5 GHz 0.5 - 2.0 GHz Supply Voltages Vcc Vee Control Voltage 4 Truth Table Control Inputs C6 0 0 0 0 0 0 1 1 C5 0 0 0 0 0 1 0 1 C4 0 0 0 0 1 0 0 1 C3 0 0 0 1 0 0 0 1 C2 0 0 1 0 0 0 0 1 C1 0 1 0 0 0 0 0 1 Attenuation Reference 0.5 dB 1 dB 2 dB 4 dB 8 dB 16 dB 31.5 dB Absolute Maximum +27 dBm +34 dBm +5.5V -8.5V -0.5V to Vcc +0.5V -55C to +125C -65C to +150C Operating Temperature Storage Temperature 3. Operation of this device above any one of these parameters may cause permanent damage. 4. Standard CMOS TTL interface, latch-up will occur if logic signal is applied prior to power supply. 0 = TTL Low 1 = TTL High Functional Schematic (Top View) PIN 1 GND GND GND 8 dB 16 dB RF1 PIN 24 GND GND GND GND 4 dB C16 C8 Vee (-5V to -8V) Vcc (+5V) 2 dB GND GND GND 1 dB C4 C2 C1 C0.5 PIN 12 GND 0.5 dB GND GND Orientation Mark GND RF2 PIN 13 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, 31.5 dB, 6-Bit, TTL Driver, DC - 2 GHz Typical Performance Curves AT-107 V 4.00 Insertion Loss vs. Frequency +85C 5.0 +25C -55C Attenuation Accuracy vs. Frequency 1 dB 4 dB 2 dB 0.5 dB Deviation from Nominal Atten (dB) 0.0 0.5 1.0 1.5 2.0 0.60 0.40 0.20 0.00 -0.20 -0.40 -0.60 0.0 0.5 1.0 1.5 2.0 Insertion Loss (dB) 4.0 3.0 2.0 1.0 0.0 Frequency (GHz) Frequency (GHz) Attenuation Accuracy vs. Frequency 8 dB 16 dB 31.5 dB RF1 VSWR vs. Frequency 1 dB 2 4 dB 8 & 16 dB Ref Loss & 0.5 dB Deviation from Nominal Atten (dB) 0.80 0.40 1.8 0.00 VSWR 1.6 1.4 -0.40 1.2 -0.80 0.0 0.5 1.0 1.5 2.0 1 0.0 0.5 1.0 1.5 2.0 Frequency (GHz) Frequency (GHz) RF2 VSWR vs. Frequency 1 & 2 dB 2 4 dB 8 dB 16 dB Ref Loss & 0.5 dB Ordering Information Part Number AT-107 PIN Package CR-13 1.8 VSWR 1.6 1.4 1.2 1 0.0 0.5 1.0 1.5 2.0 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 |
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