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october 2010 doc id 18109 rev 1 1/11 11 STEVAL-TDR027V1 portable uhf 2-way radio demonstration board based on the pd84008l-e features excellent thermal stability frequency: 380 - 512 mhz supply voltage: 7.2 v output power: > 6 w power gain: 11.7 0.5 db efficiency: 46% - 71% load mismatch: 20:1 all phases beo-free amplifier description the STEVAL-TDR027V1 demonstration board is a portable uhf 2-way radio designed as a platform for evaluating the performance of the pd84008l-e ldmos rf power transistor. table 1. device summary part number STEVAL-TDR027V1 mechanical specification: l = 60 mm, w = 30 mm www.st.com
contents STEVAL-TDR027V1 2/11 doc id 18109 rev 1 contents 1 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 typical performances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5 circuit photo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
STEVAL-TDR027V1 electrical characteristics doc id 18109 rev 1 3/11 1 electrical characteristics t a = +25 o c, v dd = 7.2 v, i dq = 200 ma table 2. electrical specification symbol test conditions min typ max unit freq frequency range 380 512 mhz p out @ p in = 27 dbm 6 w gain @ p in = 27 dbm 11.7 0.5 db nd @ p in = 27 db 46 - 71 % h2 2nd harmonic @ p in = 27 db -38 / -70 dbc h3 3rd harmonic @ p in = 27 db -60 / -70 dbc vswr load mismatch all phases @ p out = 6 w 20:1
impedance STEVAL-TDR027V1 4/11 doc id 18109 rev 1 2 impedance figure 1. impedance diagram table 3. impedance data f (mhz) z gs zdl 380 3,3 + j6,2 2,2 - j0,7 390 3,6 + j6,7 2,2 - j0,4 400 4,1 + j7,1 2,2 - j0,1 410 4,6 + j7,4 2,2 + j0,2 420 5,3 + j7,5 2,2 + j0,5 430 6,2 + j7,3 2,3 + j0,8 440 6,8 + j6,6 2,4 + j1,0 450 7,0 + j5,4 2,4 + j1,3 460 6,4 + j4,2 2,6 + j1,5 470 5,2 + j3,6 2,7 + j1,6 480 3,9 + j3,7 2,8 + j1,7 490 2,8 + j4,2 2,9 + j1,8 500 2,1 + j4,9 3,0 + j1,9 510 1,6 + j5,6 3,1 + j1,8 520 1,3 + j6,3 3,2 + j1,7
STEVAL-TDR027V1 typical performance doc id 18109 rev 1 5/11 3 typical performance figure 2. output power and efficiency vs. frequency (pin=27 dbm) figure 3. output power and efficiency vs. frequency (pin=28 dbm) figure 4. gain vs. frequency figure 5. gain vs. p out figure 6. input return loss vs. frequency figure 7. drain current vs. output power &requency-(z 0out7 %fficiency 0out %fficiency 6dd6)dqm!0ind"m !-v 6dd6)dqm!0ind"m &requency-(z 0out7 %fficiency 0out %fficiency !-v 9gg 9,gt p$ )uhtxhqf\0+] *dlqg% 3lq g%p 3lq g%p !-v 9gg 9,gt p$ 3rxwg%p *dlqg% 0+] 0+] 0+] 0+] !-v 6dd6)dqm! &requency-(z )2,d" 0ind"m !-v 9gg 9,gt p$ 3rxwg%p 'udlqfxuuhqw$ 0+] 0+] 0+] 0+] !-v
typical performance STEVAL-TDR027V1 6/11 doc id 18109 rev 1 figure 8. harmonics vs. frequency 9gg 9,gt p$3lq g%p )uhtxhqf\0+] +duprqlfvg% + + !-v
STEVAL-TDR027V1 test circuit doc id 18109 rev 1 7/11 4 test circuit figure 9. test circuit schematic diagram + tl6 tl5 c12 c13 rfout c11 l4 c10 l3 c9 c6 tl1 rfin tl2 c8 pd84008l-e ldmos r2 r1 r3 c7 l2 l1 c2 c1 vcc 2 - 1 + c4 c5 c3 b2 tl4 tl3 d1 fr4 h=60 mil msu b b1 table 4. component list component id description value case size manufacturer part code b1 ferrite bead panasonic exceldrc35c b2 panasonic exceldrc35c c1, c2 capacitor 120 pf 1206 murata grm42-6 cog 121j 50_ c3 1 nf 1206 murata grm42-6 cog 102j 50 c4 100 nf 1206 murata grm42-6_x7r 104k 50_ c5 10 uf smt panasonic eevhb1v100p c6, c13 33 pf 100b atc atc 100b 330jw c7 22 pf 100b atc atc 100b 220jw c8 47 pf 100b atc atc 100b 470jw c9 39 pf 100b atc atc 100b 390jw c10 15 pf 100b atc atc 100b 150jw c11 6.8 pf 100b atc atc 100b 6r8bw c12 2.2 pf 100b atc atc 100b 2r2bw d1 zener diode 5.1 v sod110 philips bzx284c5v1 l1 inductor 18.5 nh coilcraft a05t l2 5 nh coilcraft a02t l3, l4 2.5 nh coilcraft a01t r1 resistor 1 k ? 1206 tyco electronics 01623440-1
test circuit STEVAL-TDR027V1 8/11 doc id 18109 rev 1 r2 potentiometer 10 k ? bourns electronics 3214w-1-103e r3 resistor 560 ? 1206 bourns electronics tl1 transmission line w=2.87 mm l=7.4 mm tl2 w=2.87 mm l=5.0 mm tl3 w=4.98 mm l=4.8 mm tl4 w=4.98 mm l=4.0 mm tl5 w=2.87 mm l=1.5 mm tl6 w=2.87 mm l=6.1 mm pd84008l ldmos stmicroelectronics pd84008l-e board fr-4 thk=0.060" 2oz cu both sides table 4. component list (continued) component id description value case size manufacturer part code
STEVAL-TDR027V1 board photo doc id 18109 rev 1 9/11 5 board photo figure 10. STEVAL-TDR027V1 demonstration board
revision history STEVAL-TDR027V1 10/11 doc id 18109 rev 1 6 revision history updated table 5. document revision history date revision changes 18-oct-2010 1 initial release.
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