MA46410 - MA46470 Series 1.0, 1.25 and 1.5 Gamma GaAs Hyperabrupt Tuning Varactors Features @ CONSTANT GAMMA = 1.0, 1.25 OR 1.5 HIGH Q (UP TO 4000 AT 4 VOLTS) @ LARGER CAPACITANCE CHANGE WITH VOLTAGE @ MORE LINEAR FREQUENCY TUNING @ HIGH AND NEARLY CONSTANT MODULATION SENSITIVITY E " O 277 TT | Description The MA46450, MA46470 and MA46410 series of tuning varac- tors are hyperabrupt junction Gallium Arsenide devices featur- ing constant gamma 1.0 (MA46450 series), 1.25 (MA46470 series) or 1.5 (MA46410 series). These devices offer high Q (up to 4000) permitting excellent tuning performance from VHF through Ka band. Each device in this series exhibits the large change in capacitance versus bias voltage characteristic of hyperabrupt junctions. The standard capacitance tolerance is +10%, with tighter tolerances available. Capacitance matching at one or more bias voltages is also available. All diode types are available in a wide selection of ceramic packages and in chip form. Applications The constant gamma value of 1.0, 1.25 or 1.5 available with these diodes enables the circuit designer to produce signifi- cant improvements in circuit performance. Constant gamma tuning varactors permit more linear VCO frequency tuning than do conventional hyperabrupt tuning varactors. These varactors are particularly well suited for use in voltage tuned filters, analog phase shifters, and modulator circuits. Junction Capacitance (pF) 10 1 10.0 100 Tuning Voltage Vr + @ (Volts) M/A-COM, Inc. a 43 South Ave, Burlington, MA 01803 a 800-366-2266 165 MA46410-MA46470 Series - GaAs Hyperabrupt Tuning Varactors Specifications @ TA = 25C MA46450 Series Gamma = 1.0 MA46470 Series Gamma = 1.25 Breakdown Voltage? = 22 volts minimum Breakdown Voltage? = 22 volts minimum Gamma = 0.9 ~ 1.1, VR = 2 - 20 volts Gamma = 1.13 - 1.38, VR = 2 - 20 volts Junction Capacitance Ratio (Cyo/Cyao) = 5.0 - 80 Junction Capacitance Ratio (Cya/Cjap) = 8.15 - 12.99 253,558 Total 2:3:5,8 Total 50 MHz Capacitance Capacitance Q at* Capacitance Capacitance* Q at Model Case! @ -4 Volts Ratlo -4 Volts Model Case! @ 4 Volts Ratio (2/20) ~4 Volts Number Style Min./Max. (pF) Min./Max. Minimum 4000 MA46470 30 Os 2.2-4.1 4000 MA46471 30 07 36-56 4000 MA46472 30 1.0 48-74 3000 MA46473 30 1.2 48-47 3000 MA46474 30 15 5.0-7.4 3000 MA46475 30 18 66-8.7 3000 MA46476 30 20 66-8.7 3000 MA46477 30 2.2 66-87 3000 MA46478 30 27 6.4-10.0 2000 7 MA46479 30 3.4 6.4-10.0 2000 4.7-71 MA46480 30 3.7 68-110 2000 7.2 MA46481 30 47 69-111 1500 MA46482 30 5.6 7.2-116 1500 4 MA46483 30 68 72-115 1500 7. MA46484 30 8.2 72-115 1500 MA46465 30 . 5.0-7.6 MA46485 30 10.0 75-120 1500 MA46410 Series Gamma = 1.5 NOTES: 1. All GaAs tuning varactors are available upon special request in chip form as well as most other case styles and the standard ODS-30 Breakdown Voltage? = 18 volts minimum package. When ordering, specify the desired case by adding Gamma = 1.4 - 1.6, VR = 2 12 volts the case designation as a suffix to the type number. Junction Capacitance Ratio (Cjg/Cj12) = 6.2 - 108 2. Case parasitics (Cp and Lg) are given for most case styles along 25558 50 MHz with case outlines in this bulletin. The Cp values listed Capacitance Capacitance* Q at* typically have tolerances of +0.02 pF. Model Case! @ 4 Volts Ratio -4 Volts 3. The nominal tolerance at 4 volts is +10%. Closer tolerances are available upon request. By adding the suffix A to the part number, a tolerance of +5% at 4 volts is guaranteed. . The values guaranteed for gamma are measured on unpack- aged chips. The total capacitance versus bias voltage curve will deviate slightly from the chip capacitance versus bias voltage curve due to the package parasitic capacitance (Cp). Figures 1, 3 and 5 show the typical total capacitance (Ci) ver- sus bias voltage curves for these series of devices. Figures 2, 4 and 6 show the typical junction capacitance (Cj) versus bias voltage curves for these series of devices. Figure 7 shows the typical gamma versus bias voltage curves for these series of devices. 4.22-5.17 5. Capacitance is measured at 1 MHz. 6. Diode Q is measured by the transmission loss technique at 4 volts and extrapolated to 50 MHz. . Breakdown voltage (Vp) is measured at 10 microamps. . The total capacitance and capacitance ratios shown are for devices housed in case style 30. Other case styles will result 2.7-43 MAA6411 4 4 1. 1 1.30-1.65 1.62-1.98 1.80-2.42 2.42-2.97 612-7: on MA46425 30 9.00-11.00 MAXIMUM RATINGS in different values. Oat eee ater beet te 200% PACKAGED TUNING VARACTOR forage Temperature = io +200 Reverse Voltage Breakdown Voltage EQUIVALENT CIRCUIT ENVIRONMENTAL RATINGS PER MIL-STD-750 Rg(vV) Cyl) L, MIL Method Level Storage Temperature 1031 See maximum ratings o_# VV +H OQ, * Operating Temperature See maximum ratings Temperature Cycle 1051 10 cycles, -65C to +175C Shock 2016 500 qs Vibration 2056 18 g's Cc Constant Acceleration 2006 20,000 g's If Humidity 1021 10 days it M/A-COM, Inc. a 43 South Ave, Burlington, MA 01803 a 800-366-2266 166 MA46410-MA46470 Series GaAs Hyperabrupt Tuning Varactors Typical Performance Curves 100 -~ c uL a = ws ul Oo 10 eo z z << aq Ee = S g a & MA46463 3 MA46461 z Z MA46459 5 MA46457 5 1 i. 3 MA46451 . a A VR 100 A Vr 100 FIGURE 1. TOTAL CAPACITANCE VS. REVERSE FIGURE 2. JUNCTION CAPACITANCE VS. REVERSE BIAS VOLTAGE (y = 1.0) BIAS VOLTAGE (y = 1.0) (CASE STYLE 30) 100 100 im iL & (5 oe 10 $ 10 g a Z r 5 < g a a MA46485 3 o MA46483 z 2 MA46481 3 < 1 MA46479 5 1 MA46477 z MA46475 2 MA46473 MA46471 MA46470 A a A Vr 100 A VR 100 FIGURE 3. TOTAL CAPACITANCE VS. REVERSE FIGURE 4. JUNCTION CAPACITANCE VS. REVERSE BIAS VOLTAGE (y = 1.25) BIAS VOLTAGE (y = 1.25) (CASE STYLE 30) M/A-COM, Inc. a 43 South Ave, Burlington, MA 01803 a 800-366-2266 167 MA46410-MA46470 Series - GaAs Hyperabrupt Tuning Varactor Typical Performance Curves 100 JUNCTION CAPACITANCE (pF) waters MA46416 MA46413 MA46410 10 100 Vr FIGURE 5. JUNCTION CAPACITANCE VS. REVERSE BIAS VOLTAGE ( Y = 1.5) +10% MA46410 SERIES 100 MA46425 MA46422 Praia TOTAL CAPACITANCE (pF) MA46418 1 Turi 13 Puitiet MA4641 10 100 VR FIGURE 6. TOTAL CAPACITANCE VS. REVERSE BIAS VOLTAGE ( Y = 1.5) (CASE STYLE 30) = Ea 70 SERIES < = a +10% MA46450 SERIES 0 2 4 6 8 10 6120~C*z 18-20 VOLTAGE (VOLTS) FIGURE 7. GAMMA VS. VOLTAGE M/A-COM, Inc. a 43 South Ave, Burlington, MA 01803 a 800-366-2266 168 Case Styles MA46410-MA46470 Series - GaAs Hyperabrupt Tuning Varactor 30 Y \., NY SS es re 31 186 276 95 277 97 M/A-COM, Inc. a 43 South Ave, Burlington, MA 01803 a 800-366-2266 169