october 2010 doc id 18092 rev 1 1/9 9 STEVAL-TDR019V1 demonstration board using the pd85004 for 900 mhz 2-way radio features excellent thermal stability frequency: 860 - 960 mhz supply voltage: 13.6 v output power: 4 w power gain: 17.4 0.3 db efficiency: 56 % - 65 % load mismatch: 20:1 beo-free amplifier description the STEVAL-TDR019V1 is a demonstration board using the pd85004 ldmos transistor. it is designed for 2-way radio applications. table 1. device summary part number mechanical specification STEVAL-TDR019V1 l = 60 mm, w = 30 mm www.st.com
contents STEVAL-TDR019V1 2/9 doc id 18092 rev 1 contents 1 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 circuit layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
STEVAL-TDR019V1 electrical characteristics doc id 18092 rev 1 3/9 1 electrical characteristics t a = +25 o c, v dd = 13.6 v, i dq = 50 ma table 2. electrical specifications symbol test conditions min typ max unit frequency frequency range 860 960 mhz p out 4w gain @ p in = 19 dbm 17.4 0.3 db nd @ p in = 19 dbm 56 - 65 % h2 2nd harmonic @ p out = 4 w -30 / -38 dbc h3 3rd harmonic @ p out = 4 w -50 / -62 dbc vswr load mismatch all phases @ p out = 4 w 20:1
impedance STEVAL-TDR019V1 4/9 doc id 18092 rev 1 2 impedance figure 1. impedance illustration table 3. impedance data f (mhz) z gs z dl 860 2,460 + j6,634 8,383 + j2,828 870 2,489 + j6,787 8,222 + j3,179 880 2,588 + j6,833 8,075 + j3,456 890 2,581 + j6,913 7,884 + j3,797 900 2,629 + j6,970 7,773 + j4,100 910 2,601 + j7,063 7,609 + j4,449 920 2,570 + j7,091 7,495 + j4,773 930 2,529 + j7,134 7,360 + j5,069 940 2,423 + j7,171 7,152 + j5,365 950 2,385 + j7,246 7,079 + j5,709 960 2,265 + j7,338 6,952 + j6,071 z dl z in g d s z gs
STEVAL-TDR019V1 test circuit doc id 18092 rev 1 5/9 3 test circuit figure 2. test circuit schematic + pd85004 ldmos r2 c5 c4 c7 c6 c8 c9 c10 c11 c12 c3 vcc 2 - 1 + tl3 tl1 tl2 rf i n r1 r3 c1 tl 6 rfout c2 fr4 h=20 mi l msub tl5 tl4 b2 l1 b1 table 4. part list component id description value case size manufacturer part code b1 ferrite bead panasonic exceldrc35c b2 ferrite bead panasonic exceldrc35c c1, c2 capacitor 120 pf 0603 murata grm39-c0g121j50d500 c3 capacitor 1 nf 0603 murata grm39-x7r102k50c560 c4 capacitor 10 nf 0603 murata grm39-x7r103k50c560 c5 capacitor 10 uf smt panasonic eevhb1v100p c6, c7 capacitor 39 pf 0603 murata grm39-c0g390j50d500 c8 capacitor 3.3 pf 0603 murata grm39-c0g3r3c50z500 c9 capacitor 12 pf 0603 murata grm39-c0g120j50d500 c10 capacitor 22 pf 0603 murata grm39-c0g220j50d500 c11 capacitor 6,8 pf 0603 murata grm39-c0g6r8d50z500 c12 capacitor 1,5 pf 0603 murata grm39-c0g1r5c50z500 l1 inductor 12.55 nh coilcraft 1606-10
test circuit STEVAL-TDR019V1 6/9 doc id 18092 rev 1 r1 resistor 150 ? 0603 tyco electronics r2 potentiometer 10 k ? 3214w-1-103e r3 resistor 1 k 0603 01623440-1 tl1 transmission line w = 0.92 mm l=13.6 mm tl2 l=3.5 mm tl3 l=4.2 mm tl4 l=3.8 mm tl5 l=4.2 mm tl6 l=11.3 mm rf in, rf out sma-conn 50 ? 60 mils johnson 142-0701-801 pd85004 ldmos stmicroelectronics pd85004 board fr-4 thk=0.020" 2 oz cu both sides table 4. part list (continued) component id description value case size manufacturer part code figure 3. demonstration board photo
STEVAL-TDR019V1 circuit layout doc id 18092 rev 1 7/9 4 circuit layout figure 4. test fixture component layout
revision history STEVAL-TDR019V1 8/9 doc id 18092 rev 1 5 revision history updated table 5. document revision history date revision changes 12-oct-2010 1 initial release.
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