TAN-323 2002-02-14 1 audio ic application circuit TAN-323 application circuit example of 4-band (fm, sw, mw, lw) 3 v tuner ta2132bp 1. outline the above is an application circuit example of a 4-band (fm, sw, mw, lw) 3 v tuner. the ta2132bp is a single-chip fm/am mono tuner ic. the four-band antenna and local oscillator are switched by a lever switch (6-circuit, 4-contact). tracking is adjusted using a multi-band variable capacitor. 2. ratings rating characteristic fm sw mw lw supply voltage 3 v signal frequency range 87~108.8 mhz 5.7~15.5 mhz 508~1650 khz 140~285 khz intermediate frequency 10.7 mhz 455 khz sensitivity 13.5db v emf (s/n 30db) 7db v emf (v o 10 mvrms) 33.5db v/m (v o 10 mvrms) 48db v/m (v o 10 mvrms) sw ta2132bp f/e fm am if det v out fm sw mw lw
TAN-323 2002-02-14 2 3. precautions for use fm: (1) be sure to insert a bypass capacitor between v cc and the ic?s gnd pins (pins 5 and 8). if a bypass capacitor is not inserted, oscillation may occur at low input. also be sure to minimize common impedance from the printed circuit board pattern. (2) insert an inductor (10 h) as decoupling in the power line connecting the v cc (pin 5) to the rf tank circuit, osc circuit, and pin 14. this improves the stability of the s curve. (3) insert a bypass capacitor (0.033 f or higher) between rf v cc and the rf gnd pins (pins 14 and 2). if 0.022 f or lower is used, beat or oscillation may occur. 0.033 f ? pin 1 (4) for adjustment-free operation, a discriminator cda 10.7mg92c (murata) is used for the detector. mw: (1) the decoupling capacitor (0.033 f) connected to the v cc line between pin 5 and the rf tank and osc circuits reduces interference such as high-frequency noise. (2) as the am ceramic filter, sfu455b (murata) is used. figure 1 figure 2 0.033 f pin 5 1
TAN-323 2002-02-14 3 sw: the antenna circuit (primary tuning transformer side) has a full tap to improve sensitivity. stray capacitance, which depends on the printed circuit board pattern, cannot be ignored. the trimmer capacitance (c1) may exceed the range when adjusting the sensitivity. in such a case, reduce the stray capacitance using a transformer with a tap. other precautions am gain increase when sensitivity is insufficient for mw or lw, increase the number of turns of antenna coil on the secondary transformer. padding capacitor the am antenna and the local oscillator circuits are switched using the multi-band variable capacitor. thus, capacitance must be determined according each band frequency. use a padding capacitor with small capacitance error and high q. sw test circuit (ant) the sw characteristics are measured using the pseudo antenna circuit shown in figure 4 below. am local oscillator the distance from the oscillator for multi bands to pin 12 is long due to restrictions on component allocation. as a result, some faults such as parasitic oscillation, oscillation halt, and undesirable local oscillation may be caused. especially when the pattern line is long, the ac impedance component cannot be ignored. oscillation may occur in the parasitic circuit shown in figure 5. the oscillation can be avoided by inserting a resistor (75 ) in series. figure 3 sw antenna coil ant c1 test board pseudo antenna circuit 10 pf 80 figure 4 figure 5 v cc parasitic circuit 75 12
TAN-323 2002-02-14 4 ta2132bp-4band (fm, sw, mw, lw) application circuit 4.7 f fmrfin amrfin rf gnd fmrfout mixout am/fm sw agc fmosc vcc amosc fm if in afc am if in det out gnd quod 13 14 15 16 12 11 10 9 8 7 6 5 4 3 2 1 ta2132bp fm sw lw mw fm sw lw mw fm sw lw mw fm sw lw mw fm sw lw mw fm sw lw mw 10 pf l3 l4 50 pf l9 10 pf 390 pf 270 pf 4300 pf 10 pf l7 l8 l6 27 pf 220 pf 33 pf 50 pf 18 pf l1 22 pf l5 4 pf 100 k 1 k 22 k 0.033 f cda10.7mg92c 0.47 f 100 k 330 pf 0.033 f 30 pf gfwb7 330 sfe10.7ma5 sfu455b 0.033 f 4.7 f t1 5plg-5147x 33 f fm, sw ant am varicons: pvc-22kt-l fm varicons: pvc-22kt-l 75 det out v cc bpf 51 pf 13 pf mw, lw ant coil 10 h
TAN-323 2002-02-14 5 coil specification turns no. stage f (hz) l ( h) c (pf) q 1-2 2-3 1-3 4-6 wire (mm) note l1 fm rf 100 m 0.06 100 4 1 2 0.5 uew (s) 0258-000-021 l2 sw ant 7.96 m 2.1 105 3 7 10 8 0.08 muew (s) 4148-3167-063 l3 mw ant 796 k 285 200 69 13 (3-4) 7/0.07 uatc l4 lw ant 252 k 2910 100 218 (2-6) 16 (7-3) 4/0.07 ustc (m) mse-0118-1 l5 fm osc 100 m 0.045 100 4 3 1 0.5 uew (s) 0258-000-020 l6 sw osc 7.96 m 1.85 85 6 5 11 0.1 uew (s) 2158-4095-508 l7 mw osc 796 k 120 120 13 56 0.07 uew (t) a7brs-12552y l8 lw osc 796 k 170 120 29 63 92 0.07 uew (s) 4155-2239-074a t1 mw ift 455 k 470 60 109 7 0.05 uew (t) 5plg-5147x s: sumida electric co., ltd m: mitsumi (segamat) sdn. bhd t: toko, inc pin connections (bottom view) t1 l1, l5 l2 l6, l7, l8 3 2 1 4 6 1 2 3 4 6 l3 (mw) l4 (lw) 1 2 3 4 v.c 2 6 7 3 v cc pin v cc v.c 16 pin 16 v cc v cc fmcf 2 3 1 4 6 pin 4 amcf v cc
TAN-323 2002-02-14 6 example of printed circuit board pattern 1 rp-2045 4band ta2132bp fm sw1 sw2 mw fm sw mw lw v cc gnd v out osc lw mw mw osc sw2 sw2 ant ant sw1 sw osc a nt gnd sw1 sw mw lw fm rf fm osc 4 7 1 6 2 3
TAN-323 2002-02-14 7 thd (%) input signal level v in (db v, e mf) fm output ? v in output level (db) signal frequency (mhz) fm sens, im rej ? f s sensitivity (db v emf) image ratio (db) 10 20 30 40 108 106 102 98 94 90 88 lim. sens ( 3db) image (v o 50mvrms) sens (s/n 30db) v cc 3 v mod 22.5 khz f m 400 hz bw 400 hz~30 khz 20 80 60 40 0 20 0 20 40 120 80 60 100 10 50 30 20 70 10 0db 70 mvrms bw 400 hz~30 khz 97.995 mhz 22.5 khz f m 400 hz, v cc 3 v signal amr mod 30% f m 400 hz noise 75 khz thd 22.5 khz 140 4 3 2 1 output level (db) thd (%) input signal level v in (db v, e mf) sw output ? v in signal frequency (mhz) sw sensitivity ? image ratio sensitivity (db v emf) image ratio (db) 0 10 20 30 40 6 8 10 12 14 16 4 v cc 3 v f m 400 hz mod 30% bw 400 hz~30 khz image (v o 20 mvrms) sens (s/n 20db) maximum sens (v o 10 mvrms) 80 20 70 60 50 40 30 20 10 0 20 0 20 100 120 140 40 60 80 10 10 mhz f m 400 hz mod 30% signal mod 80% thd mod 30% noise v cc 3 v, bw 400 hz~30 khz 0db 68.5 mvrms 4 3 2 1 output level (db) thd (%) equivalent electric field intensity efi (db v/m) mw output ? v in signal frequency (khz) mw maximum sensitivity s/n maximum sens (db v/m) s/n (db) 80 20 70 60 50 40 30 20 10 0 20 0 20 100 120 140 40 60 80 10 noise mod 30% 1002.6 khz f m 400hz mod 30% v cc 3 v, 0db 68 mvrms bw 400 hz~30 khz signal mod 80% thd 4 3 2 1 20 30 40 60 1600 1400 1200 1000 800 600 sens (s/n 30db) 50 400 maximum sens (v o 10 mvrms) s/n (60db/m) bw 400 hz~30 khz v cc 3 v, mod 30% f m 400 hz
TAN-323 2002-02-14 8 thd (%) equivalent electric field intensity efi (db v/m) lw output ? v in output level (db) signal frequency (khz) lw maximum sensitivity s/n maximum sens (db v/m) s/n (db) 80 20 70 60 50 40 30 20 1 0 20 0 20 100 120 140 40 60 80 10 noise mod 30% 220.01 khz f m 400 hz mod 30% v cc 3 v 0db 51 mvrms bw 400 hz~30 khz signal mod 80% thd 4 3 2 1 20 30 40 50 60 160 180 200 220 240 260 v cc 3 v f m 400 hz mod 30% bw 400 hz~30 khz maximum sens (v o 10 mvrms) 280 300 s/n (60db v/m)
TAN-323 2002-02-14 9 toshiba is continually working to improve the quality and reliability of its products. nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. it is the responsibility of the buyer, when utilizing toshiba products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such toshiba products could cause loss of human life, bodily injury or damage to property. in developing your designs, please ensure that toshiba products are used within specified operating ranges as set forth in the most recent toshiba products specifications. also, please keep in mind the precautions and conditions set forth in the ?handling guide for semiconductor devices,? or ?toshiba semiconductor reliability handbook? etc.. the toshiba products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). these toshiba products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury (?unintended usage?). unintended usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. unintended usage of toshiba products listed in this document shall be made at the customer?s own risk. the products described in this document are subject to the foreign exchange and foreign trade laws. the information contained herein is presented only as a guide for the applications of our products. no responsibility is assumed by toshiba corporation for any infringements of intellectual property or other rights of the third parties which may result from its use. no license is granted by implication or otherwise under any intellectual property or other rights of toshiba corporation or others. the information contained herein is subject to change without notice. 000707eb a restrictions on product use
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