UM9401 MICROSEMI | Alldatasheet
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© Specified low distortion ¢ Low bias current requirements © Microsemi ruggedness and reliability ¢ Priced for high quantity applications Description: a Microsemi offers a series of PIN diodes while the UM9415 will handle over 1000W. specifically designed and characterized for The extensive characterization of these PIN solid state antenna switches in commercial diodes in antenna switch applications has two-way radios. Antenna switches using the _ resulted in guaranteed low distortion specifi- UM9401 and UM9415 series PIN diodes pro- cations under transmit and receive vide high isolation, low loss and low distortion conditions. These dindas also feature low characteristics formerly possible only with forward bias resistance and high zero bias electromechanical relay type switches. impedance which are required for low loss, The UM9401 and UM9402 diodes can high isolation and wide bandwidth antenna handle above 100W of transmitter power, SWitch performance. MAXIMUM RATINGS ee 7 UM9401 uMm9402 UM9415_ Reverse Voltage (V,) — Volts eit Pz fa| sl Lead Length — ¥% in. (12.7mm) Total 5.5W 10W to 25°C Contacts 25°C (Package Flange) Temperature - _ Free Air 1.5W 2.5W UM9401 UM9402 j28 (a2) 620(591 [ | : Fy UM9415 ‘YELLOW CATHODE BAND -et:f 2 Watertown 637 [The code excens
Electrical Specifications (at 25°C) lumaaovumeso2| ——_umoai5| vs Fw sa | Freee bof ie] ron 1 = 50 mA a GC A a Vi = Ov Vi= OV Carrier Lietime [+ | r0]a0] fs | Pas [1 = toma Transmit Harmonic Distortion | Pes, Pos Py = SOW A A f = 50 MHz,! = 50 mA Receive Third Order Distortion P,, — 10 mW, OV Bias ft, = 50 MHz, f = 51 MHZ Reverse Leakage Current [| ik [| [ro | [ [10 [ua [v=sov [Femara PP et [pe [8 ea tema TYPICAL FORWARD RESISTANCE TYPICAL DC CHARACTERISTIC vs 2 ———— FORWARD CURRENT ——— = (F = 100 MHz) ———s | os sons led Fd ascii: aes Stiiama chim bait emer meeti | 2 oo LO Pow ped A |” Se a = z sais Sea itiaessis messin: aeeessicmemans 3 = fumosss [7S
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UMO415 (UM9401/9402 ; _| 1 Lie. | € RN | 5. J, ae ew _ g zur | | g 6 | FY umoso2 gs : LX =a Ay | | \\ | | [| B bey NT HEAT SINK gz. ISS \\ £ e.szommp WI L= 4°27 mm) 7. | SN > Ss = NS | °. ==> NN BassN 4, N ; SS | N GE OSS ou 1 _| - (19.05 mm) SA T, — Lead Temperature (°C) 1, ~ HEAT SINK TEMPERATURE (°C) MAXIMUM TRANSMITTER POWER UM9415 UM9401/UM9402 = Paros. ela L = = =e" (2. s Epes < fess tera F v000 FP ts = =o 3 * SSS eS SS 3 ao 4 é BSS a @ <i =200ma 1 = TS 1 '
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Maximum Transmitter Power switch using UM9401s and UM9416s can The maximum CW transmitter power, safely handle for various forward currents Primax» @ PIN diode antenna switch can han- and Jead temperatures. These curves are dle depends on the diode resistance, Rs, based on a typical design condition of a ¥% power dissipation, P,, antenna SWR, 9, and in. total overall lead length, 509 line nominal impedance, Z,. The expression impedance and a totally mismatched relating these parameters is as follows: antenna (o = ©). For the case of a perfectly P 2 matched antenna, the maximum transmitter Primey = Po 2 (22*) [Watts] power can be increased by a factor of 4. Ro 20 Characteristic curves are shown in the Design Information data section which give both the maximum A circuit configuration for a two-way radio and typical diode resistance, Rs as a antenna switch using PIN diodes consists of function of forward current. The maximum _a diode placed in series with the transmitter power dissipation rating of the PIN diode and a shunt diode placed a quarter wave- depends both on the length of the diode length from the antenna in the direction of leads and the temperature of the contacts to the receiver as shown. For low frequency which the leads are connected. A graph operation, the quarter wave line may be defining the maximum power dissipation at simulated by lumped elements. Typical per- various combinations of overall lead length formance of antenna switches using PIN (L) and lead temperature (T)) Is given in the diodes forward biased at 100 mA is less than data section. From these curves and the 0.2 dB insertion loss and 30 dB isolation above equation, the power handling during transmit; at zero bias the receive capability of the PIN diode may be computed __ Insertion loss Is less than 0.3 dB. This perfor- for a specific application. mance is achievable across a + 20% band- Curves are also presented which showthe width at center frequencies ranging from 10 maximum transmitter power that an antenna to 500 MHz. De SUPPLY 9 Wy envenne Rec eB be 1014 vce > Lt TRANSMITTER 02 RECEIVER DC SUPPLY Wen Le tye C= 2rfezo REC pes L pee : : .
580 PLEASANT STREET + WATERTOWN, MA 02172,
TEL. (61) 926-0408 » FAX G17) 9241295 6-40 PraNTEOWUSA