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| 30 kHz to 18 GHz High-Gain Power Amplifier Description The IT2025J is a RoHS-6-compliant packaged broadband GaAs MMIC traveling wave amplifier designed for medium output power applications where low-frequency extension capabilities are also required. The IT2025J provides saturated output power greater than 25 dBm up to 8 GHz, greater than 23 dBm up to 16 GHz, and greater than 20 dBm at 18 GHz. Average gain is greater than 25 dB. DC power consumption as low as 2.4 W. Input/output ports are DC coupled. Frequency range: 2 GHz - 18 GHz with low-frequency extension capability down to 30 KHz >25 dBm nominal Psat (30 kHz - 8 GHz) >20 dBm nominal Psat (30 kHz - 18 GHz) >25 dB nominal gain up to 18 GHz 2.4 W DC power consumption Nominal DC bias conditions: 8 V at 300 mA Full chip passivation for high reliability RoHS-6-compliant small-form-factor (0.450 x 0.350 x 0.078 in.) SMD package IT2025J Features www..com Device Diagram Both gain stages and their respective RF and DC connections are shown at right. The internal coupling capacitor value between the cascaded gain stages is 0.1 F. VD1 and VD2 are applied to the gain stages through on-chip resistors. VCTRL1 VD1 VCTRL2 VD2 IN Gain Gain OUT VG1 Recommended bias conditions: VG2 VD1 = 8 V, VG1 = -0.8 V to - 0.9 V, VCTRL1 = 0 V, ID1 = 80 mA VD2T = 8 V, VG2 = -0.5 V to -0.7 V, VCTRL2 = +3.5 V, ID2T = 220 mA For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937, e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com. 1 30 kHz to 18 GHz High-Gain Power Amplifier Absolute Maximum Ratings Notes: Control voltage Parameter Drain voltage Gate voltage Symbol VD1, VD2,, VD2T VG1, VG2 VCTRL1 VCTRL2 ID1,ID2 ID2T PIN PD TJ TM TSTO RHSTO -65 5 -2.5 VD1 - 8V VD2T - 8V VD1 VD2T 150 300 5 4 150 230 150 95 Min Max 10.0 Units V V V Notes 1 1 1 IT2025J 1. Combinations of drain voltage, drain current, and output power shall not exceed www..com PD at package base temperature of 85o C. 2. Set VG1 and VG2 such that drain currents are below maximum limits. 3. See "Thermal Characteristics". Drain current Input power Power dissipation Junction operating temperature Mounting temperature Storage temperature Storage relative humidity mA dBm W o 1,2 1 3 C C C o o % Electrical Characteristics (at 25 C) in 50-ohm system. Symbol BW S21 S11 S22 S12 Parameters/conditions Frequency range* Small-signal gain Input return loss Output return loss Isolation Saturated power output (3-dB gain compression) 30 Hz - 8 GHz 30 kHz - 18 GHz Output power (1-dB gain compression) 30 kHz - 8 GHz 30 kHz - 18 GHz Output third-order intercept point Noise figure 500 MHz - 2 GHz 2 GHz - 10 GHz 10 GHz - 18 GHz Min. 0.00003 24 10 7 50 24 19 Typ. Max. 18 Units GHz dB dB dB dB 30 12 10 Psat 26 21 dBm dBm P1dB 22 17 24 20 dBm dBm OIP3 32 5.5 4.5 6.0 dBm dB dB dB NF (*) Low-frequency extension available with recommended choke network. For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937, e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com. 2 30 kHz to 18 GHz High-Gain Power Amplifier Performance Data T = 25 C S21 (dB) IT2025J 40 35 30 25 20 15 10 5 0 2 4 Gain S21 Test includes effects of evaluation board. VD1 = 8 V VCTRL1 = 0 V www..com ID1 = 80 mA VD2T = 8 V VCTRL2 = +3.5 V ID2T = 220 mA 6 8 10 12 Freq (GHz) Input Return Loss 14 16 18 0 -5 S11 (dB) -10 -15 -20 -25 -30 -35 0 2 4 6 8 10 12 Freq (GHz) 14 16 18 0 -5 S22 (dB) -10 -15 -20 -25 -30 -35 0 2 Onput Return Loss 4 6 8 10 12 Freq (GHz) 14 16 18 For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937, e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com. 3 30 kHz to 18 GHz High-Gain Power Amplifier IT2025J Output Power (dBm ) Output Power Performance www..com 34 32 30 28 26 24 22 20 18 16 14 12 10 2 4 P1dB and P3dB (2 to 18 GHz) P1dB P3dB 6 8 10 12 Freq (GHz) 14 16 18 Output power at 1-dB gain compression (low frequencies) Freq. (GHz) Output power at 3-dB gain compression (low frequencies) 30 29 28 27 26 25 24 23 22 21 20 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 P3dB (dBm) Freq. (GHz) For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937, e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com. 4 30 kHz to 18 GHz High-Gain Power Amplifier OIP3 IT2025J www..com O IP 3 (d B m ) Output Power Performance (cont.) 40 36 32 28 24 20 0 2 4 6 8 10 12 14 16 18 20 Freq. (GHz) Noise Figure IT2025J Noise Figure 12 10 8 6 4 2 0 024 6 8 10 12 14 16 18 20 Freq. GHz For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937, e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com. NF (dB) 5 30 kHz to 18 GHz High-Gain Power Amplifier Circuit Design for low-Frequency Extension Applications to 30 kHz* VDD IT2025J Stage 1 amplitude control C4 Stage 2 amplitude control C5 VD2 VCTRL1 VD1 VCTRL2 L2 R2 C8 L1 R1 www..com C3 VD2T C1 VIN Gain Gain C2 VOUT VG2 C6 VG1 C7 Stage 1 gate voltage Reference Designation C1, C2 C3 - C8 R1, R2 L1 L2 Stage 2 gate voltage Description 0.10 F cap, 0402, X5R, 10 V 1.00 F cap, 0603, X5R, 16 V 180 ohm resistor, 0402, 5% 0.33 H inductor 100 H inductor Manufacturer Panasonic Panasonic Panasonic Toko America Coilcraft Part Number ECJ-0EB1A104K ECJ-1VB1C105K ERJ-2GEJ181X FSLU2520-R33K DO1608-104MLB This application circuit is used on the IT2025J evaluation board, which is available to customers who desire a convenient test platform for this product. The IT2025J design was verified with the components and configuration described above. Note that VD2 is not used in this configuration. C1 and C2 are coupling capacitors for the RF input and output. Highperformance capacitors (such as those manufactured by Presidio) may be substituted. C3 to C8 are power supply decoupling capacitors. L1, L2, R1, and R2 are the required external components for the choke network that supplies the output stage bias current for applications down to 30 kHz. These components can be replaced with different values if the low-frequency cutoff is higher than 30 kHz. (*) For applications in which the minimum frequency is 2 GHz, L1, L2, R1, and R2 can be removed and only C8 is required. For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937, e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com. 6 30 kHz to 18 GHz High-Gain Power Amplifier Package Details Notes: 1. Tolerances on package length and width are 0.005 in. www..com IT2025J Lid 2. Tolerance on package height is 0.006 in. 0.350 3. Tolerances on all pad dimensions and features are 0.002 in. 4. Substrate material: RO4003, 0.008-in.thick, 1/2 oz. copper. 5. Plating: 100 to 350 in nickel, 5 to 10 in. flash gold finish. 6. Package footprint available in DXF format. Contact iTerra Communications for details. 7. RoHS compliant. Backward compatible with SnPb soldering. IT2025J XXnnnn 0.450 0.016 0.407 0.437 0.175 Pin 1 0.023 0.000 0.000 0.327 0.367 0.047 0.087 0.127 0.167 0.206 0.411 0.078 Pin 1 indicator 0.326 0.255 0.175 0.096 0.003 typ For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937, e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com. 7 30 kHz to 18 GHz High-Gain Power Amplifier Pad Details Notes: 20 21 22 23 24 IT2025J 10 11 12 13 14 15 16 17 1. Pad widths and heights are in mils. 2. Pads 19 to 27 are www..com ground pads. Although they are shown as independent structures, they should all be connected to one contiguous ground pad on the application board. 3. Package footprint available in DXF format. Contact iTerra Communications for details. Pad 1 2 3 4 5 6 7 8 9 Function N/C N/C VG1 N/C N/C VG2 N/C N/C VOUT 9 19 18 25 26 27 8 7 6 5 4 3 2 1 Width 26 18 18 18 18 18 18 18 27 Height 41 41 41 41 41 41 41 41 18 Pad 10 11 12 13 14 15 16 17 18 Function N/C N/C VD2T VD2 VCTRL2 VD1 N/C VCTRL1 VIN Width 18 18 18 18 18 18 18 18 20 Height 41 41 41 41 41 41 41 41 18 Thermal Characteristics The thermal impedance between the package base (ground pad 19) and each amplifier junction (JB) is approximately 25C/W. Consider this thermal impedance as well as thermal conditions in the final application and the desired IT2025J bias settings to keep internal junction temperatures below their specified limits. The following formulas may be used to calculate the operating junction temperatures (TJ1 and TJ2) for each of the two cascaded amplifiers in the IT2025J. TJ1 = TBASE + ( VD1 x ID1 ) x 25o C/W TJ2 = TBASE + ( VD2T x ID2T ) x 25 C/W or TJ2 = TBASE + ( VD2 x ID2 ) x 25 C/W For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937, e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com. 8 |
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