NJG1508F SPDT SWITCH GaAs MMIC nGENERAL DESCRIPTION NJG1508F is a GaAs SPDT switch MMIC which features low loss, high isolation and low control current, and ideally suitable the cellular phone handsets which needs to switch during two frequency bands. NJG1508F is operated in the wide frequency range from 50MHz to 3GHz at a low voltage from 2.5V with very small MTP6 package. nFEATURES lSingle and low control voltage lLow insertion loss lHigh isolation lTransmission power lLow control current lPackage nPACKAGE OUTLINE NJG1508F +2.5~+5.5V 0.3dB typ. @f=1.0GHz, Pin=0dBm 27dB typ. @f=1.0GHz, Pin=0dBm 19dBm max. @f=2.0GHz, VCTL=3.0V 1.0uA typ. @f=0.05~2.5GHz, Pin=10dBm MTP6 (Mount Size: 2.8x2.9x1.2mm) nPIN CONFIGURATION Orientation Mark F Type (Top View) 1 6 2 5 3 4 Pin Connection 1.VCTR1 2.PC 3.VCTR2 4.P2 5.GND 6.P1 nTRUTH TABLE “H”=VCTR (H), “L”=VCTR (L) VCTR1 H L L H VCTR2 L H P1-PC OFF ON P2-PC ON OFF L Loss=15dB P1 Return Loss=-3dB Loss=15dB P2 Return Loss=-3dB H Loss=16dB P1 Return Loss=-2dB Loss=16dB P2 Return Loss=-2dB Note) The values of “Loss” and “Return Loss” are typical values. -1- NJG1508F nABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER SYMBOL RATINGS UNITS Pin 28 dBm VCTR 6.0 V Power Dissipation PD 300 mW Operating Temp. Topr -20~+85 °C Storage Temp. Tstg -40~+150 °C Input Power Control Voltage nELECTRICAL CHARACTERISTICS (VCTR (L)=0V, VCTR (H)=2.7V, ZS=ZO=50Ω, Ta=25°C) PARAMETER SYMBOL RATINGS MIN TYP MAX UNITS Control voltage (L) VCTR (L) f=0.05~2.5GHz, Pin=10dBm -0.2 0.0 0.2 V Control voltage (H) VCTR (H) f=0.05~2.5GHz, Pin=10dBm 2.5 2.7 5.5 V Control current ICTR f=0.05~2.5GHz, Pin=10dBm - 1.0 2.0 uA Insertion loss 1 Loss1 f=1.0GHz, Pin=0dBm - 0.3 0.6 dB Insertion loss 2 Loss2 f=2.0GHz, Pin=0dBm - 0.5 0.85 dB ISL1 f=1.0GHz, Pin=0dBm 23 27 - dB ISL2 f=2.0GHz, Pin=0dBm 20 23 - dB Pin at 1dB compression point P-1dB f=2.0GHz 19 22 - dBm VSWR (PC, P1, P2) VSWR f=0.05~2.5GHz, ON State - 1.3 1.6 f=0.05~2.5GHz - 15 - Isolation 1 (PC-P1, PC-P2, P1-P2) Isolation 2 (PC-P1, PC-P2, P1-P2) Switching time -2- Tsw ns NJG1508F nTYPICAL CHARACTERISTICS - 3- NJG1508F nTYPICAL CHARACTERISTICS -4- NJG1508F nTYPICAL CHARACTERISTICS - 5- NJG1508F nTYPICAL CHARACTERISTICS -6- NJG1508F nTYPICAL CHARACTERISTICS MARKER f(MHz) Mag. Ang. (∠o) 1 50 0.912 -21.7 2 800 0.748 170.1 3 1500 0.728 101.3 4 2000 0.718 61.7 5 3000 0.671 -8.7 MARKER f(MHz) Mag. Ang. (∠o) 1 50 0.881 -19.2 2 800 0.713 172.3 3 1500 0.690 104.9 4 2000 0.681 66.1 5 3000 0.643 -3.2 - 7- NJG1508F nTYPICAL CHARACTERISTICS Scattering Parameters: S11 (OFF STATE) (VCTR=0/2.7V, 50ΩSystem) -8- NJG1508F nAPPLICATION CIRCUIT 1: Single control signal operation by using C-MOS inverter. [1]Please connect bypass capacitors to the supply terminals f the C-MOS inverter. [2]In order to stabilize input impedance of inverter, please pull down using 510KΩ resister from the input terminal of the C-MOS inverter to the ground plane. nAPPLICATION CIRCUIT 2: Single control signal operation by using a transistor. - 9- NJG1508F nTEST CIRCUIT Zo=50Ω P2 VCTR1 (0V/2.7V) 3 4 C4 C1 Zo=50Ω 2 5 R1 PC C3 Zo=50Ω 6 P1 1 VCTR2 (2.7V/0V) C5 C2 NJG1508F nRECOMMENDED PCB DESIGN (TOP VIEW) PC VCTR2 VCTR1 C3 C4 PCB SIZE=19.4x14.0mm R1 PCB: FR-4, t=0.5mm CAPACITOR: size 1005 C5 P2 P1 C2 C1 STRIP LINE WIDTH=1mm C1~C3: 56pF C4, C5: 10pF R1: 510KΩ Precautions [1]External capacitors should be connected to the input and output RF terminals (P1, P2, PC) to block the DC current. The above example is a circuit at 900MHz.Please select the capacitor value suitable for actual frequency from 10pF to 1000pF. [2]Decoupling capacitors should be connected to the control terminals (VCTR1, VCTR2) as close as possible. The values of these capacitors should be selected from 5pF to 100pF range. Please consider that these values are very effective to switching time (Larger capacitor gives longer switching time). [3]In order to keep good isolation characteristics, the ground terminal (5pin) should be connected to the ground pattern with wider width as close as possible, and through-hole in the ground plane should also be placed as close as possible. - 10 - NJG1508F nPACKAGE OUTLINE (MTP6) Lead material : Copper Lead surface finish : Solder plating Molding material : Epoxy resin UNIT : mm Weight : 14mg Cautions on using this product This product contains Gallium-Arsenide (GaAs) which is a harmful material. • Do NOT eat or put into mouth. • Do NOT dispose in fire or break up this product. • Do NOT chemically make gas or powder with this product. • To waste this product, please obey the relating law of your country. [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. This product may be damaged with electric static discharge (ESD) or spike voltage. Please handle with care to avoid these damages. - 11-