demoboard stv5712 stv5715 - tea5705 AN629/0693 summary page i introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 ii stv5712/stv5715 application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 iii stv5712/tea5705 application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 iv pcb layout pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 v silkscreen printing pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 i - introduction one pcb, two applications, many options. to take advantage of the pin to pin compatibility of the 2 heads video amplifier stv5715 with the 4 heads video amplifier tea5705 is the guideline of this demoboard. with one pcb two main applications can be real- ized : - stv571 2/stv5715 providing a 2 video/2 fm audio playback/record solution - stv571 2/tea5705 providing a 4 video/2 fm audio playback/record solution. additionnaly the pcb layout of the board offers the user several application options as desired. ii - stv5712/stv5715 application the demoboard is mounted according to the typi- cal application diagram (figure 1). regarding the stv5715 part, v r1 and v r2 trim- mers have been added in order to easily adjust the record signal to the required level. supply voltages stv5712 stv5715 playback mode v cc = 5v v cc = 5v record mode v cc = 5v v cc = 5v and 5v < v rec < 12v application options provided by the pcb lay- out figure 2 gives an example of electrical diagram using the pcb options. stv5712 part : - c109/c110 capacitors can be added to tune the head peaking effect, - c105/c112 capacitors can be added to filter the control signals (only when disturbances can be noticed) stv5715 part : - c24/c25 can be added to tune the head peak- ing effect, - using q2, q3, r15, r16, r17, r18 circuitry, the stv5715 can be supplied with a single 5v line in record mode. 1/6
trivadj ls p sw h sw m hlp h l j3 22nf c102 22nf c103 22nf c101 22nf jp2 c105 1nf r104 1k w r107 100 w r101 5.6 w r201 r102 1k w r103 750 w c106 22nf vr101 500 w l101 47 m h c108 22 m f c107 22nf 2 1 3 r106 1k w c112 1nf 1 7 fm out s gnd sw h sw rec v v p gnd cc in r105 1k w c111 22nf stv5712 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 c104 c23 22nf c28 22nf c5 22nf c8 22nf c7 22nf c9 22nf d4 d3 c6 22nf rj2 0 w rj1 0 w r14 1k w c27 22nf j1 1 10 c30 330nf 17 18 19 20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 r20 1.5k w r8 1k w r9 1k w r10 100 w r11 100 w jp4 r19 18 w r21 10k w r22 10k w gnd rec c triv adj chroma pb fm pb triv gnd v pb/rec cc cc v rec j2 rec y 1 14 sw mod sw head r4 4.5k w r3 1.5k w vr2 500 w 2 3 1 2 3 1 vr1 500 w 22nf c11 stv5715 v cc l2 47 m h l1 47 m h c18 22nf c21 22 m f c21 22 m f jp1 2 x 1n4148 AN629-01.eps figure 1 : stv5712/stv5715 typical application stv5712 - stv5715 - tea5705 demoboard 2/6
tr ivad j lsp sw h sw m hlp h l j3 c109 10pf c110 10pf 22nf c102 22nf c103 22nf c101 22nf jp2 c105 1nf r104 1k w r107 100 w r101 5.6 w r201 r102 1k w r103 750 w c106 22nf vr101 500 w l101 47 m h c108 22 m f c107 22nf 2 1 3 r106 1k w c112 1nf 1 7 fm out s gnd sw h sw rec v v p gnd cc in r105 1k w c111 22nf stv5712 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 c104 c23 22nf c28 22nf c5 22nf c8 22nf c7 22nf c9 22nf d4 d3 c6 22nf rj2 0 w rj1 0 w r14 1k w c27 22nf j1 1 10 c30 330nf 17 18 19 20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 r20 1.5k w r8 1k w r9 1k w r10 100 w r11 100 w jp4 r19 18 w r21 10k w r22 10k w gnd rec c triv adj chroma pb fm pb triv gnd v pb/rec cc cc v rec j2 rec y 1 14 sw mod sw head r4 4.5k w r3 1.5k w vr2 500 w 2 3 1 2 3 1 vr1 500 w 22nf c11 stv5715 v cc l1 47 m h c18 22nf c21 22 m f c21 22 m f c24 10pf c25 10pf jp1 bc237 bc557b jp3 r15 10k w r16 22k w r18 10k w r17 10k w 2x 1n4148 q2 q3 AN629-02.eps figure 2 : stv5712/stv5715 application example using the pcb layout options iii - stv5712/tea5705 application the demoboard is mounted according to the typical application diagram (figure 3). similarly to the stv5715, v r1 and v r2 trimmers have been added in order to easily adjust the record level to the required level. supply voltages as stv5712/stv5715 application stv5712 - stv5715 - tea5705 demoboard 3/6
trivadj detector detector j3 22nf c102 22nf c103 22nf c101 22nf jp2 c105 1nf r104 1k w r107 100 w r101 5.6 w r201 r102 1k w r103 750 w c106 22nf vr101 500 w l101 47 m h c108 22 m f c107 22nf 2 1 3 r106 1k w c112 1nf 1 7 fm out s gnd sw h sw rec v v p gnd cc in r105 1k w c111 22nf stv5712 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 c104 c5 22nf c8 22nf c7 22nf c9 22nf d4 d3 c6 22nf jp5 r14 1k w c27 22nf j1 1 10 c30 330nf 17 18 19 20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 r8 1k w r9 1k w r10 100 w r11 100 w r21 10k w r22 10k w gnd rec c triv adj chroma pb fm pb triv gnd v pb/rec cc cc v rec j2 rec y 1 14 sw mod sw head r4 4.5k w r3 1.5k w vr2 500 w 2 3 1 2 3 1 vr1 500 w 22nf c11 tea5705 v cc l2 47 m h l1 47 m h c18 22nf c21 22 m f c21 22 m f 21 22 23 24 25 26 27 28 d2 c4 22nf c3 22nf c29 22nf c1 22nf c2 22nf d1 c26 22nf r13 1k w 4 x 1n4148 sp/lp c31 1nf jp6 r2 4.5k w r1 1.5k w c10 22nf c19 22nf c13 4.7nf r6 1.5k w r5 2k w r7 18k w jp1 AN629-03.eps figure 3 : stv5712/tea5705 typical application stv5712 - stv5715 - tea5705 demoboard 4/6
application options provided by the pcb lay- out figure 4 gives an example of electrical diagram using the pcb options. stv5712 part : see chapter ii tea5705 part : - c22/c23/c24/c25 can be added to tune the head peaking effect, - using q2, q3, r15, r16, r17, r18 circuitry, the tea5705 can be supplied with a single 5v line in record mode. trivadj detector detector j3 22nf c102 22nf c103 22nf c101 22nf jp2 c105 1nf r104 1k w r107 100 w r101 5.6 w r201 r102 1k w r103 750 w c106 22nf vr101 500 w l101 47 m h c108 22 m f c107 22nf 2 1 3 r106 1k w c112 1nf 1 7 fm out s gnd sw h sw rec v v p gnd cc in r105 1k w c111 22nf stv5712 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 c104 c5 22nf c8 22nf c7 22nf c9 22nf d4 d3 c6 jp5 r14 1k w c27 22nf j1 1 10 c30 330nf 17 18 19 20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 r8 1k w r9 1k w r10 100 w r11 100 w r21 10k w r22 10k w gnd rec c triv adj chroma pb fm pb triv gnd v pb/rec cc cc v rec j2 rec y 1 14 sw mod sw head r4 4.5k w r3 1.5k w vr2 500 w 2 3 1 2 3 1 vr1 500 w 22nf c11 tea5705 v cc c18 22nf c21 22 m f c21 22 m f jp1 21 22 23 24 25 26 27 28 d2 c4 22nf c3 22nf c29 22nf c1 22nf c2 22nf d1 c26 22nf r13 1k w 4 x 1n4148 sp/lp c31 1nf jp6 r2 4.5k w r1 1.5k w c10 22nf c19 22nf c13 4.7nf r6 1.5k w r5 2k w r7 18k w jp1 c22 10pf c23 10pf c24 10pf c25 10pf 22nf l1 47 m h q3 bc237 q2 bc557b jp3 r15 10k w r16 22k w r18 10k w r17 10k w AN629-04.eps figure 4 : stv5712/tea5705 application example using the pcb layout options stv5712 - stv5715 - tea5705 demoboard 5/6
video stv5715/tea5705 audio fm stv5712 v h a AN629-05.eps figure 5 c21 l2 c30 r15 jp1 d3 d4 r13 c26 c27 r14 c8 c6 c24 d2 rj1 d1 c4 rj2 c28 c5 c25 c7 c3 c23 c22 c2 c1 r6 r5 c19 c29 c104 c109 c110 c103 r107 jp5 r105 c111 jp2 c102 c108 l101 c107 r101 r201 c101 r102 c112 r103 c106 c105 r106 vr101 r104 r2 r1 r3 r4 c10 c11 c13 jp4 r7 r19 c31 r20 r8 r9 r22 vr1 vr2 r10 jp6 r18 l1 jp3 r11 c18 r21 r16 r17 q3 q2 c20 c9 pl02ax r AN629-06.eps figure 6 iv - pcb layout pattern (copper side) v - silkscreen printing pattern (connectors side) stv5712 - stv5715 - tea5705 demoboard 6/6
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