Microwave Diode and Capacitors - Cobham plc

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Ceramic GaAs Hyperabrupt Tuning Varactor Diodes The ML4572 and ML4580 Series of tuning varactors are hyperabrupt junction gallium arsenide devices. These series off especially high “Q factors” (up to 4000) that permit excellent tuning performance from VHF to 40GHz. With these devices, linear tuning of frequency with bias voltage can be achieved for VCOs with moderate tuning bands using transistors, Gunns or IMPATTs as well as with tunable filters and amplifiers. These diodes are an excellent choice for modulators applications where better linearity or nearly constant modulation sensitivity is desired. Specifications @ +25°C Capacitance C T-4 (pF) Type Number Min. Typical Max Total Capacitance Ratio C TO /C TVB Max. Quality Factory Min. Breakdown Voltage (V) Min. Standard Case Style ML4572 0.40 0.57 0.74 5.5. 4000 25 96 ML4573 0.75 0.87 0.99 6.0 3500 25 96 ML4574 1.00 1.25 1.49 7.0 3000 25 96 ML4575 1.50 1.75 1.99 8.5 3000 25 96 ML4576 2.00 2.25 2.49 9.0 2500 25 96 ML4577 2.50 2.75 2.99 9.0 2500 25 96 ML4578 3.00 3.50 3.99 9.5 2000 25 96 ML4579 4.00 4.50 4.99 9.5 2000 25 30 ML4580 5.00 5.50 5.99 10.0 2000 25 30 Notes: 1. The capacitance law of the diode chip is of the form. C (V R = 0.1V) = 2.75 pF C (V R = 0.3V) = 2.6A pF C (V R = 1.0V) = 1.85A pF Where A = C (V R = 4.0V) = 0.485A pF C (V R = 10V) = 0.30A pF C d = total capacitance C p = case capacitance C (V R = 25V) = 0.26A pF 2. GaAs Hyperabrupt Tuning Varactors are available in alternative case styles as well as in chip form. When ordering specify the desired case by adding the case designation as a suffix to the type number for example ML4572-96. Cobham MAL Ltd trading as Cobham Sensor Systems www.cobham.com/sensorsystems © Cobham plc, 2010. Whilst every effort is made to ensure the accuracy of the information contained in this brochure, no responsibility can be accepted for any errors and/or omissions. Descriptions and specifications of products are subject to change without notice Page 11 of 37
Typical Performance Cobham MAL Ltd trading as Cobham Sensor Systems www.cobham.com/sensorsystems © Cobham plc, 2010. Whilst every effort is made to ensure the accuracy of the information contained in this brochure, no responsibility can be accepted for any errors and/or omissions. Descriptions and specifications of products are subject to change without notice Page 12 of 37
Page 1 and 2: Microwave Diode and Capacitors 2010
Page 3 and 4: Frequency Multiplier Diodes Silicon
Page 5 and 6: Bias Resistor Selection (R b ) The
Page 7 and 8: Gallium Arsenide Multiplier Varacto
Page 9 and 10: Tuning Varactor Diodes Ceramic Pack
Page 11: Notes: 1. GaAs tuning varactors are
Page 15 and 16: Notes: 1. All GaAs tuning varactors
Page 17 and 18: PIN Diodes Fast Switching PIN and N
Page 19 and 20: Broadband PIN Diodes The ML4660 and
Page 21 and 22: Silicon Dioxide Passivated Chip PIN
Page 23 and 24: Silicon Limiter PIN Diode The ML 42
Page 25 and 26: Chip Capacitor with Square Bonding
Page 27 and 28: Case Style Index 3 11 Inches Millim
Page 29 and 30: Case Style Index 94 95 Inches Milli
Page 31 and 32: Case Style Index 108 109 Inches Mil
Page 33 and 34: Cobham MAL Ltd trading as Cobham Se
Page 35 and 36: Equivalent Parts List The majority
Page 37 and 38: Equivalent Parts List Part Number D
Page 39: For further information please cont

Microwave Diode and Capacitors - Cobham plc

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