october 2010 doc id 18048 rev 1 1/8 8 STEVAL-TDR023V1 rf power amplifier using 1 x pd55025-e n-channel enhancement -mode lateral mosfets features excellent thermal stability frequency: 460 - 540 mhz supply voltage: 13.6 v output power: 20 w gain: 13.3 db typ. efficiency: 51% - 66% load mismatch: 20:1 beo free amplifier in compliance with the 2002/95/ec european directive description the STEVAL-TDR023V1 is a common source n-channel enhancement-mode lateral field effect rf power amplifier designed for uhf mobile radio applications. table 1. device summary part number STEVAL-TDR023V1 mechanical specification: l = 70 mm, w = 30 mm www.st.com
contents STEVAL-TDR023V1 2/8 doc id 18048 rev 1 contents 1 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 circuit layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
STEVAL-TDR023V1 electrical characteristics doc id 18048 rev 1 3/8 1 electrical characteristics t a = + 25 c, v dd = 13.6 v, i dq = 150 ma table 2. electrical specification symbol test conditions min. typ. max. unit freq frequency range 460 540 mhz p out 20 w gain @ p out = 20w 13.3 db gain flatness @ p out = 20w 1.5 db efficiency @ p out = 20w 51 - 66 % h2 @ p out = 20w -48 -55 db h3 @ p out = 20w -55 -60 db vswr load mismatch all phases @ p out = 20w 20:1
test circuit STEVAL-TDR023V1 4/8 doc id 18048 rev 1 2 test circuit figure 1. test circuit schematic
STEVAL-TDR023V1 circuit layout doc id 18048 rev 1 5/8 3 circuit layout figure 2. circuit layout table 3. component part list part type component id description value case size manufacturer part code cap c1 capacitor 150pf 1206 murata grm42- 6c0g151j50 cap c2 capacitor 150pf 1206 murata grm42- 6c0g151j50 cap c3 capacitor 1 nf 1206 murata grm42- 6c0g102j50 cap c4 capacitor 10 nf 1206 murata grm42- 6x7r104k50 electrolytic cap c5 capacitor 220 f tantalum cap c6 capacitor 1 f cap c7 capacitor 47pf 100b atc 470 cap c8 capacitor 3.3pf 100b atc 3r3 cap c9 capacitor 6.8pf 100b atc 6r8 cap c10 capacitor 39pf 100b atc 390 cap c11 capacitor 39pf 100b atc 390
circuit layout STEVAL-TDR023V1 6/8 doc id 18048 rev 1 part type component id description value case size manufacturer part code cap c12 capacitor 5.6pf 100b atc 5r6 cap c13 capacitor 3.9pf 100b atc 3r9 cap c14 capacitor 47pf 100b atc 470 tl tl1, tl7 transmission line w = 2.87 mm l = 6 mm tl tl2 transmission line w = 4.9 mm l = 5 mm tl tl3, tl4 transmission line w = 6 mm l = 3 mm tl tl5 transmission line w = 4.9 mm l = 2.5 mm tl tl6 transmission line w = 4.9 mm l = 2.5 mm ferrite bead b1 ferrite bead panasonic exceldrc35c ferrite bead b2 ferrite bead panasonic exceldrc35c inductor l1 inductor 43nh coilcraft mini spring b10tj inductor l2 inductor 5nh coilcraft mini spring a02tj inductor l3 inductor 5nh coilcraft mini spring a02tj transistor pd55025-e ldmos stmicroelectronics pd55025-e resistor r1 resistor 15 ohms 1206 tyco electronics 01623440-1 pot r2 potentiometer 10 k bourns electronics 3214w-1-103e resistor r3 resistor 1k 1206 tyco electronics 01623440-1 sma-conn rf in sma-conn johnson 142-0701-801 sma-conn rf out sma-conn johnson 142-0701-801 zener d1 zener diode 5.1 v sod110 philips bzx284c5v1 board fr-4 thk=0.060" 2oz cu both sides table 3. component part list (continued)
STEVAL-TDR023V1 revision history doc id 18048 rev 1 7/8 4 revision history table 4. document revision history date revision changes 11-oct-2010 1 initial release.
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