TA7765AF TOSHIBA | Alldatasheet

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TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC AM/FM IF SYSTEM (1.5V USE) The TA7765AF is an AM/FM IF system IC designed for low voltage operation (1.5V), which is especially suitable for a stereo headphone radio and a radio cassette recorder. This IC can realize the low power dissipation and few external parts.

FEATURES

—— S) @ Including the AM/FM switch. YS <5 qu @ Including the single output terminal for AM/FM. TS ~ @ Including the LED driver for tuning indicator. (VLED= 2.5V) @ Few external parts and small installed area. e@ Excellent supply current : (Vcc =1.5V, Ta = 25°C) SORTER 225-1. 00A xcel : =1.5V, = r AM : Icc=1.1mA (Typ.) Weight : 0.14g (Typ.) FM : Ic¢=1.8mA (Typ.) © Operating supply voltage range. : Vee (opr) = 0.95~5V (Ta = 25°C) BLOCK DIAGRAM FM E/E FM MPX Vee ar Y [2 Z E yt hc -n g = Lam aaa sane | am max ani 3S S 6 9 _¢9 Qa VPASS_ gy our apavrass cain ees on a DRIVER DET, FM IF GND LED LED AF Vee TE Det a 1 += oout | vec re) 2610016802 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 observe standards of safety, and to avoid situations in which a malfunction or failure of a TOSHIBA product 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 products specifications. Also, please keep in mind the precautions and conditions set forth in the TOSHIBA Semiconductor Reliability Handbook 1997-07-07 1/9

(1) FM-IF input stage “ec The terminal pin@ is the FM-IF input terminal which is the base of common-emitter transistor. (Fig.1) FM IF IN (2) FM-IF stage 220pF This is composed of the six stage of the common- ul Sg emitter amplifiers with active loads. As the third a a stage and the fourth stage are connected with internal coupling condenser, it is composed of HPF. Fig. Therefore, it is possible to reduce the noise of low frequency range. (3) AM input stage -3| Voc to AM IF @ The terminal pin® is the AM input terminal which is Mix : the base of common-emitter transistor. our ‘osc And this transistor is the current source of the Mixer which is composed of emitter coupled pair AM IN (2) O AGC transistors. (Fig.2) BF (4) AM-IF input stage Bar Antenna 4 _43) cy The AM-IF signal from the MIX OUT terminal (pin®) Qn is applied to the AM-IF input terminal (pin®) through the transformer. Fig.2 The terminal pin® is the base of common-emitter transistor, and the input resistance is 3k (Typ.). (5) AGC circuit This AGC circuit is composed of the internal Double- AGC get high applied widely. cmecium input : AGC applied to IF section. (ey AMDT i : i i AM IF strong input : AGC applied to RF and IF section. Hc ==. © vec IN. (10) HH et Fer 6 022A S 1] & AM RF Yec Fig.3 9610016802"

9 Fhe products described in tis document are subject to foreign exchange and foreign trade control 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 1997-07-07 2/9

(6) Output buffer amplifier (AF) The output impedance differs in FM/AM mode. At Vcc VieD FM mode, it is low output impedance due to pass | © the sub-carrier. On the other hand, at AM mode, it is high output impedance due to high frequency-cut | easily. (4)—° Rout (FM) = 1.3kQ (Typ.) B | J Power Rout (AM) = 8kQ (Typ.) (7) LED driver Fig.4 shows the LED driver. The “LED supply voltage” must be more than about Fig.4 2.5V, for using this function. Without the LED, it is necessary to connect the eM terminal pin@ to GND, then the supply current is al © Vec reduced. AM Le ox 6 veo StOP_ a) (8) FM/AM mode switch circuit When the terminal pin is connected to Vcc directly, the FM mode is given, and when this aa |) terminal is opened, the AM mode is given. In case of connecting as Fig.5, one-circuit switch is enough to stop the VCO at AM mode. Fig.5 FM. op 9 vec aM veo TA7766AF TATT65AF stop Fig.6 8997-07-07. 3/9

MAXIMUM RATINGS (Ta = 25°C) CHARACTERISTIC. SYMBOL RATING UNIT Supply Vortage [vee] 5 | v_] Lamp Voltage [vamp [6 |v Operating Temperature (Note) Derated above Ta=25°C in the proportion of 2.8mW/°C.

ELECTRICAL CHARACTERISTICS

Unless otherwise specified, Ta = 25°C, Vcc = 1.5V FM : f=10.7MHz, Af = +22.5kHz, fm =1kHz, Vin =90dBuV EMF AM : f=1MHz, MOD = 30%, fp = 1kHz, Vin = 60dBV EMF TEST] CHARACTERISTIC SYMBOL TEST CONDITION jn. |r. || unr CUIT} supply curren cm] _ [FM Vin=o [staat Ice (2) [AMVin=O | = | 11 [18 | input Limiting Voltage | Vin dim) | — | -348 Limiting point_| — | 53 | 59 [Bz EMP| Recovered Output Voltage | _Vop | — | [38 | 48 [60 | meme _| say| Signal To Noise Ratio | S/N | — | a Total Harmonie Distortion | THO | — | [= os =| *_| [AM Rejection Ratio | AMR | — [MOD=30% [=p [— |_| Lamp On Sensitivity | vi_[—|h=tma | — | 48 | 56 [dBav EMF [cain | Gy | = Vig = a0 em [10] 32] 50] Vers | Recovered Output Voage | Vop | — | [30 | 48 | 75 | meme | Signal To Noise Ratio | S/N |—| [—fa[— ya _| Total Harmonie Distortion | THD | — | [= [as [=| *— Local OSC Stop Voltage | Veep |—| sd = | — [oss] Vv | ee 1997-07-07 4/9

DC CHARACTERISTICS (Vcc =1.5V, Ta=25°C, terminal voltage at no signal) ee PIN@ (GND) ——SC~d v2 | Cd [pin (CeD BYPASS) =| v3 | — | — |v] PIN@ eo) Sid Sa dT SC Cd Cd VY fens (em Quad DE) | vs 15. | 15 | v | Ine (AMON «de | ts [PIN (We) —S~dSCg | tT CTY Ine (acc) ——S~d Sg | Ci PIn@ (AMIN) | Vig [14 | a5 |v [Pina (AM IF BYPASS) | _Vin__| 14 15 | v_| PIN AM MiKoUT) | viz [15 | 15 | Vv [pin (aM Mix BYPASS) | Viz_| 07 | — | v_| PIN@ (AMIN) id Via“ 07 | — | vd nosey Sid ig | 15) 15 fv | mms ss 1997-07-07 59

es aM EZ = Tarp-+ Ro H SFU4S5B 2 Vin taaa4 fa oh! Sh --! 0.022 osc SWOAMIN| bv), MKsov2EN aC OUT TA7765AF am Ar FM IN GND LED BY LED QUAD DET ouT Vee 5 1 Lt 8 ‘ cy) O47 pF 2000 8 & i a [| 8-4-0 ar out S 8 z 3 3} we | aks a i— oy bed ol 3 3 S18 x if ese 78 ° 2 a ae Ca . oe] eff. ds jg, SFE 10.7MA 87 T3 in “qurata) g ° fe) fe) ~ fe) Ilep = VieD=3V Voc check COIL DATA (Test circuit) © : SUMIDA ELECTRIC Co., Ltd. COIL Li ¢ TURN WIRE wee | stace | + | hn 68 | 90 Fares tis paey dtm “ [tz [am ier | asser2[ — [180 [110 | a8 | 60 | — | 8 [007uEw|S 487-037-475 Am ET | asskHz| — [120 [110 | 146 | 6 | — | 1a [0.07UEW |) aaw037-935¢ am osc | 796kHz{ 288 | — | 125] 13 | 75 | — | — [o.0suew|©S 0137-135-262 (Bottom view) 11 FM DET Tz AM IFT T3 AM DET T4 AM OSC Vee Vee cr Vee ve Qo ® @ @ @ in ORO © © (9) Pin® Pin® Pind Pin® Voc TT 1997-07-07 6/9

FM Vop, AMR, S/N, THD Vin lec, Vop - Vec 60) 7 PTT vecessv [TF v0 «totais Is PPE LT | eto 2m || | | tne te __ TELL f= 1kez — TTT Af= £22.5kHz dev. _

388 Lf fff ate szzstne ev = nae Vin=90dapv eme = f}0

48 TT TTTTTTT PP? # ¢ tps g 528 = - es Lily yf =e [itil ieery yt yg ee ot TLV fom Te UL TT Pes ~20 L mL bo £ 23 VA z ge [iT IMALT Vey) ¢ = LITA TT Titi, é eee LL AN AT proves |B OL TT | fee | EE fe VET NIV TT TP Lt eer T Ty] | tg 328 2 -10 2 = FOOON elt, Comers ¥ LPT NEE Pie Tee pee ey, PCCP ee LOCC ~80 20 40 60 80 100 72 ° 0861 2 3 4 5 INPUT VOLTAGE Vin (dB EMF) SUPPLY VOLTAGE Vcc (V) Vin (lim). VoD, Qs, Icc - Ta VL, THD = Vcc Ff vccnisv LETT TTT wine s0cs,a em ets ee ere e LEET TT | to-tne lof sses | | | [| pee vino Fe | | | [| | | ate +22skie dev a =e v1 LL! {iso Vin =90dByV EMF z TLLTLELELLLLL = =e = N os 2 5e8e J LEEPT TTL © JONEEEEEEEEEr # gL EL we Lett ty ar PE Lee fi ft pe 8 Bs og tee eee Ee Pe 3,3 5 [f b Fadl g ee: “ew Fee i yeep a tt toe > g 8 gf LA | Tih TTT Ty ease [+o CC ET, 5582 8 8 pa § 2 eee: gege ||) TTT tT ty & PTT ttt TT yy eh wo L_ TTT TT tt ti | wodglyl | TT | tt TT | AMBIENT TEMPERATURE Ta (°C) SUPPLY VOLTAGE Vcc (V) TOTO 9-07-0779

AM Von. S/N, THD = Vin lec, Vop - Vee doe LLELLCTT, TI CLL as f=1MHz (i fifi ftir ¢ ae Vop (0d8 = 48mVrms) Tt 3 ee af mem LTTE TTT) 3g 8 aa ae is . oe opi envns 2 é a lee = ° ¢ to Til, 2 vy Ji | | Pe tty og oe Lore Tr gs oe ri Cee TTT | 3 # TL TZITNETT TET Ty og é og in 2 a See ee eee g ee Nee PE tem Ld gf {1 |srrrl tt Tr Veecoavew || & S EEREREEER EEE) : “0 20° «40-60 80100120 0708 2 3 4 5 INPUT VOLTAGE Vin (dByuV EMF) SUPPLY VOLTAGE Vcc (V) Vop, Qs, Icc - Ta VL, THD - Vec PTT TT vccorsy . ee od | LT | tmatkne fm=tkHz 3 ERR 71). MOD =30% = eee MoD=30% 5 = EDD “ BBE ce ee 2 Perec : ee rd 2 fa s FELL ITT TET > at Be : £ FPreohebceol; : Hipp a a ee eee es 5 ad g Pe gece OR me Geer by coo: ae [eee a ° Lt | Ti it tt tt | a a a a a | oe 2 ~SC«SSCaStCi SSC AMBIENT TEMPERATURE Ta (C) SUPPLY VOLTAGE Vcc (V) 1997-07-07 8/9

SSOP16-P-225-1.00A Unit : mm 16 9 ‘ eZ al 2 al = | & e oO] 2 wo] A wt] oO x 1 8 8.7MAX 8.2+0.2 io a vy parte) a,-s 3 OT = ha r fo) eas 0.525+0.2 r~) Weight : 0.14g (Typ.) TOOT TOTTI