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 & |