STEVAL-TDR025V1 Portable UHF 2-way radio demonstration board based on the PD84001 Preliminary data Features ■ Excellent thermal stability ■ Frequency: 380 - 520 MHz ■ Supply voltage: 7.2 V ■ Output power: 1 W ■ Power gain: 15.5 ± 0.7 dB ■ Efficiency: 58 % - 67 % ■ Load mismatch: 20:1 ■ BeO-free amplifier Description The STEVAL-TDR025V1 demonstration board is a portable UHF 2-way radio designed as a platform for valuating the performance of the PD84001 LDMOS RF power transistor. Table 1. October 2010 Device summary Order code Mechanical specification STEVAL-TDR025V1 L = 60 mm, W = 30 mm Doc ID 18122 Rev 1 This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice. 1/10 www.st.com 10 Contents STEVAL-TDR025V1 Contents 1 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2/10 Doc ID 18122 Rev 1 STEVAL-TDR025V1 1 Electrical characteristics Electrical characteristics TA = + 25 °C, VDD = 7.2 V, Idq = 100 mA Table 2. Symbol Freq Electrical specifications Test conditions Frequency range Min. Typ. 380 POUT Max. Unit 520 MHz 1 W Gain @ PIN = 15 dBm 15.5 ± 0.7 dB ND @ PIN = 15 dBm 58 - 67 % H2 2nd harmonic @ PIN = 15 dBm TBD dBc H3 3rd harmonic @ PIN = 15 dBm TBD dBc VSWR Load mismatch all phases @ POUT = 1 W Doc ID 18122 Rev 1 20:1 3/10 Impedance 2 STEVAL-TDR025V1 Impedance Figure 1. Impedance illustration D ZDL Z ZGS IN G S Table 3. 4/10 Impedance data f (MHz) ZGS ZDL 380 8.53 + j1.78 18.79 + j8.37 410 7.84 + j4.05 17.15 + j7.78 440 7.29 + j6.3 15.56 + j7.95 470 6.77 + j8.63 14.08 + j8.58 500 6.36 + j10.91 12.8 + j9.53 520 6.13 + j12.5 12.05 + j10.3 Doc ID 18122 Rev 1 STEVAL-TDR025V1 Typical performance 3 Typical performance Figure 2. Output power vs. frequency Vdd = 7.2 V, Idq = 100 mA Figure 3. 2.2 Efficiency vs. frequency Vdd = 7.2 V, Idq = 100 mA 100 Pin=15dBm Pin=15dBm 90 1.8 1.4 Efficiency (%) Output Power (W) 80 1 70 60 50 40 0.6 30 0.2 360 380 400 420 440 460 480 500 520 540 20 360 380 400 Figure 4. Gain vs. frequency Vdd = 7.2 V, Idq = 100 mA Figure 5. 0 17 -1 Input Return Loss (dB) 18 Gain (dB) 16 15 14 420 440 460 480 500 520 540 Frequency (MHz) Frequency (MHz) Pin=15dBm 13 Input return loss vs. frequency Vdd = 7.2 V, Idq = 100 mA -2 -3 -4 -5 Pin=15dBm 12 360 380 400 420 440 460 480 500 520 540 -6 360 Frequency (MHz) 380 400 420 440 460 480 500 520 540 Frequency (MHz) Doc ID 18122 Rev 1 5/10 Typical performance Output power vs. input power Vdd = 7.2 V, Idq = 100 mA Figure 7. 36 80 34 70 32 60 30 50 Efficiency (%) Output Power (dBm) Figure 6. STEVAL-TDR025V1 28 26 40 30 380 MHz 440 MHz 470 MHz 520 MHz 24 380 MHz 440 MHz 470 MHz 520 MHz 20 22 10 20 0 2 4 6 8 10 12 14 16 18 20 22 0.0 Figure 8. Output power vs. supply voltage Pin = 15 dBm, Idq = 100 mA 36 35 34 Output Power (W) 33 32 31 30 380 MHz 440 MHz 470 MHz 520 MHz 29 28 27 26 4 5 6 7 8 0.2 0.4 0.6 0.8 1.0 Output Pow er (W) Input Power (dBm) 9 10 11 Supply Voltage (V) 6/10 Efficiency vs. output power Vdd = 7.2 V, Idq = 100 mA Doc ID 18122 Rev 1 1.2 1.4 1.6 1.8 STEVAL-TDR025V1 Test circuit 4 Test circuit Figure 9. Test circuit schematic Vcc 1+ MSub 2- R3 B2 B1 C3 FR4 H=20 mil C1 R2 L1 R1 TL5 C2 TL6 L3 TL7 C9 RFin TL1 C4 TL2 C7 C6 Table 4. L2 TL3 C5 RFout C10 TL4 LDMOS C8 PD84001L PD84001 Part list Component ID Description B1 Value Case size Manufacturer Part code Ferrite Bead Panasonic EXCELDRC35C B2 Ferrite Bead Panasonic EXCELDRC35C C1, C2 Capacitor 120 pF 0603 Murata GRM39-C0G121J50D500 C3 Capacitor 1 µF 0603 Murata GRM39-X5R105K16D52K C4, C5 Capacitor 39 pF 0603 Murata GRM39-C0G390J50D500 C6 Capacitor 1.2 pF 0603 Murata GRM39-C0G1R2C50Z500 C7 Capacitor 3.9 pF 0603 Murata GRM39-C0G3R9C50Z500 C8 Capacitor 12 pF 0603 Murata GRM39-C0G120J50D500 C9 Capacitor 5.6 pF 0603 Murata GRM39-C0G5R6D50Z500 C10 Capacitor 3.3 pF 0603 Murata GRM39-C0G3R3C50Z500 L1 Inductor 12.55 nH Coilcraft 1606-10 L2,L3 Inductor 5.4 nH Coilcraft 0906-4 R1 Resistor 510 Ω R2 Potentiometer 10 kΩ R3 Resistor 1k 0603 Tyco Electronics Bourns Electronics 3214W-1-103E Tyco Electronics 01623440-1 0603 TL1 Transmission line W=0.92 mm L=10.5 mm TL2 Transmission line W=0.92 mm L=0.8 mm TL3 Transmission line W=0.92 mm L=1.0 mm Doc ID 18122 Rev 1 7/10 Test circuit Table 4. STEVAL-TDR025V1 Part list (continued) Component ID Description Value Case size TL4 Transmission line W=0.92 mm L=4.5 mm TL5 Transmission line W=0.92 mm L=3.6 mm TL6 Transmission line W=0.92 mm L=1.5 mm TL7 Transmission line W=0.92 mm L=10.0 mm RF in, RF out SMA-CONN PD84001 LDMOS Board 50 Ω Manufacturer Part code JOHNSON 142-0701-801 STMicroelectronics PD84001 60 mils FR-4 THk=0.020" 2 OZ Cu both sides Figure 10. Demonstration board photo 8/10 Doc ID 18122 Rev 1 STEVAL-TDR025V1 5 Revision history Revision history Table 5. Document revision history Date Revision 19-Oct-2010 1 Changes Initial release Doc ID 18122 Rev 1 9/10 STEVAL-TDR025V1 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. 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