HA1156W FM STEREO DEMODULATOR = FEATURES @ Low External Part No Coils @ Only One Adjustment of Semifixed Volume for Oscillation Frequency @ High Operating Stability Against Environmental Condition Change @ Total System Including Stereo Demodulator, Automatic Stereo-Monaural Switching Circuit, and Stereo Indicator Lamp Driver Low Total Harmonic Distortion During Monaural Operation (0.15% typ. at f = 400 Hz, Vin = 560 mV) @ Perfect Synchronous Stereo Indicator Lamp Operation to teahi (DP-14) Stereo-Monaural Switching = FUNCTIONAL BLOCK DIAGRAM LPF. TIME CONST rT] 7 19kHz MONITOR 0 Vee po---------@G------- ~~) === == == == = === | | ! \ V2 I PHASE vco ol (2) DIVIDER \ COMP. (76kHz) (jak) ! ' ! ! L f- ! 1/2. (19kHe) ; DIVIDER | DECODER * STABILIZED | | ' | J POWER ' J SUPPLY \ ; (19kHz) i 20 ' ( | | t 1 | ' \ ' ' ' PHASE LAMP \ Le \ COMP. DRIVER ' | \ ( i L_-~4}------(5}-.- ---------(8}-(9}----------+-+--- (6}----- --- Lout Rout Y GND Stereo , L.P.F. Indicator (3) Vee HITACHI 27HA1156W aCIRCUIT SCHEMATIC AND TYPICAL EXTERNAL PARTS Cros 0.50 +B(2V) Crm 22m Com 0.051 Cw Rios Cis ik GND 7 t Cin 0.0124 5 Rio 3.9k Rie 3, 4 Lout Coz 0.0124 | b------- + - - ee ee LLL 0 19kHz MONITOR 100k i Rios t poof fpr YAO ESAT tT ese COUNTER ( | t ' \ | Unit R:Q \ \ CIF | ; Ha Tema ma aH a HHA BP - 49} -- ~ ---~-- Rios 200(1W) 0 12V Cros 0.254 STEREO INDICATOR LAMP = ABSOLUTE MAXIMUM RATINGS (Ta= 25C) Item Symbol Rating Unit Supply Voltage Vee 16 Vv Lamp Current fe 75 mA Power Dissipation* Pr 400 mW Operating Temperature Tope 20to+ 85 C Storage Temperature Tet 55to+125 C * Value at Ta= 85C 28 HITACHI= ELECTRICAL CHARACTERISTICS (Vcc=12V, f=1kHz, Ta= 25C unless otherwise noted) HA1156W Item Symbol Test Condition min typ max Unit Input Impedance Zin _ 50 _ kQ p= 5SmV f=100Hz _- 45 _ = 56mV, Channel Separation Sep L-+ R= 50dmV f= kHz 30 45 _ dB = 504m f=10kHz _ 40 _ p= 5mV f= 100Hz _ 0.25 _ = 56mV, Stereo Total Harmonic Distortion ST.T.H.D Lt R=50dmV f=1kHz _ 0.15 0.5 % = 504m f= 10kHz _ 0.30 _ Output Voltage Vout Vin= 560mMV _ 300 _ mV Channel Balance C.B Viz= 560mV _ 0.5 1.5 dB Monaural Total Harmonic Distortion Mono T.H.D Vin= 560mV _ 0.15 0.7 % P= 56mV, f=19kHz _ 35 _ Carrier Leak cL dB L+R=504mV f= 38kHz _ 45 _ SCA Rejection Ratio SCA Rj Sc. pea nae 75 dB Pilot Level for Lamp ON Leon) 12 16 20 mV Stereo Lamp Hysteresis _ 6 _ dB Capture Range CR P= 56mV _ +3 _ % Signal-to-noise Ratio S/N Via= 560mV (standard) , Rg== 4k _ 76 _ dB Total Current Drain Ir Lamp OFF _ 13 _ mA : . Stereo : T.H.D=0.5%, P= 10% _ _ Maximum Input Signal Vin t+ R=90%, Monaural : TH.D~1.0% 1.3 Vrms w= TEST CIRCUIT oe + =. 12V( Lamp) t | en -O12V( +B) | 1 | \ Steren aw [ $ Hi Monaural MONITOR 3-949. 0124 | 19 Jone ai Steren | Filt Steren INPUT AC sore 15kHH 208} S.G 4.7u po] 19kH2< 55dB (5) y= (Ror) O 38kH2< 55dB Cio 4.70 | Monaural Audio $.G | T.H.Ds0.02% 1 Monaural! Stereo i ! Distortion Meter t HP-3344 t t 1 I = = . | Unit R:Q | Lt Compelling Monaural Standard Circuit \ C:F 4 HITACHI 29HA1156W = EXTERNAL COMPONENTS FUNCTION Rioi, Rio2, Cros, Cio2: Load resistors and de-emphasis capacitors Cio3: Input coupling capacitor to demodulator Ciog: Internal coupling capacitor Rios, Cros, Ciog : Phase loop filter components Rioa, VRio1,Ci07: Oscillator timing network which determines free running = STANDARD PRINTED CIRCUIT BOARD (Bottom View) frequency of HA1156W, Adjust the semifixed volume VR; 01 so that Pin 10 output frequency becomes exactly 19 kHz at no pilot input. Cios: Filter capacitor for stereo switch level detector. If Pin 8 is grounded directly, HA1156W operates in monaural mode independent of the pilot input level. Rios: Resistor which limits the lamp current (especially at tamp ON) Input Monitor 19kHz Lamp Row GND Lew Bt TOTAL HARMONIC DISTORTION AND SEPARATION VS. MODULATION FREQUENCY Vec= = 56mV (10% +R= Vv ( ep. L>R,R>L Separation Sep (dB) 1 Total Harmonic Distortion T.H.D (% ) D 0 50 100 200 400600 2k 1 Modulation Frequency fy (Hz) 30 HITACHI MAIN SIGNAL DISTORTION AND SUBSIGNAL DISTORTION VS. MODULATION FREQUENCY 2 Vec= P=10% L+R -90% (L-R =90%) 2. Main Signal Distortion. Sub Signal Distortion (%) 0 ignal 10k Modulation Frequency fy (Hz)Separation Sep (dB) HA1156W TOTAL HARMONIC DIST ORTION AND SEPARATION VS. MAIN SIGNAL INPUT VOLTAGE Lamp- off Lamp-on ysteresis ral Stereo 2.8 Voc = 12 f= 1kHz =1 +R= Stereo 2.0 HD 0 100 200 300 400 500 600 700 800 , . 100 Main Signal Input Voltage Vin(main) (mV) CHANNEL BALANCE, R-CHANNEL OUTPUT VOLTAGE AND TOTAL HARMONIC DISTORTION VS. SIGNAL FREQUENCY | . bl + 4 3 o S _ _ nD nN NR | 8 Total Harmonic Distortion T.H.D (%) o | = S R-channel Output Voltage Vee: (dB) t & Vee=12V V.=560mV Monaural Channel Balance C.B (dB) Signal Frequency f (Hz! TOTAL HARMONIC DISTORTION AND SEPARATION VS. SUPPLY VOLTAGE Separation Sep. (dB) ep. LR, RL P=56mV L+ R=504mV 1kHz s Supply Voltage Vcc (V) SCA REJECTION RATIO VS. SCA SIGNAL FREQUENCY Vec12.0V P=-S6mV L+R 504mV-J 7 1kHz( Standard SCA =56mV Stereo Total Harmonic Distortion T.H.D. (%) SCA Rejection Ratio SCA Rej (dB) SCA Signal Frequency fsca (kHz) CHANNEL BALANCE, TOTAL HARMONIC DISTORTION AND R-CHANNEL OUTPUT VOLTAGE VS. INPUT VOLTAGE nN oO 2.4 2.0 B (R Standard) 1.2 0.8 Channel Balance C.B (dB) 0.4 Total Harmonic Distortion T.H.D (%) R-channel Output Voltage Veser (mV) Oo Input Voltage Via tmV? x > 2.0 1.6 1.2 o @ Total Harmonic Distortion T.H.D (%) ~ HITACHI 3]HA1156W FREE-RUNNING FREQUENCY DRIFT, SCA REJECTION RATIO AND PILOT LAMP INPUT LEVEL FOR LAMP ON/OFF VS. SUPPLY VOLTAGE 120 100 SCA Rejection Ratio SCA Rej (dB) J o 8 Pilot Lamp Input Level Vz (mV) =56mV SCA =56mV L+R=504mV Stereo +300 SCA Rej Ssca=67kHz fsca (Stereo) Supply Voltage Ver (V) CHANNEL BALANCE, TOTAL HARMONIC DISTORTION AND R-CHANNEL OUTPUT VOLTAGE VS. SUPPLY VOLTAGE = ~ s ~ & a = R-channel Output Voltage Veus(r) (mV) o oo o ~ Total Harmonic Distortion T.H.D (%) g 12 Supply Voltage Ver (V) FREE-RUNNING FREQUENCY DRIFT VS. AMBIENT TEMPERATURE 32 HITACHI + Vecom12.0V, f19kHz Put into temperature test chamber on standard circuit (include external parts), C107470pF (OPPM/"C ) VRio =5kQ ( +100PPM/C) + + ree Running Frequency Drift Af (Hz) +10 Ambient Temperature Ta (C) Free Running Frequency Drift Af (Hz) Channel Balance C.B (dB)HA1156W. TOTAL HARMONIC DISTORTION AND SEPARATION VS. circuit (include external parts) Cir = 470pF (OPPM/*C) V Rye = 5kQ (+ 100PPM/C ) o > 10 T.H.D|R AMBIENT TEMPERATURE 2.8 70 x a 2.4 60 zo w 2.08 50 c 2 a 21.645 40 5 Stereo Biot Ver =12. OV, f= 1kHz, 3 ee P= 10% =56mV, L+ R= 90% = 504mV a Put into temperature test 0.83 20 r on standard 3 = s e Oo 0 +10 +20 +30 +40 +50 +60 +70 +80 Ambient Temperature Ta (C ) CHANNEL BALANCE, TOTAL HARMONIC DISTORTION AND R-CHANNEL OUTPUT VOLTAGE VS. AMBIENT TEMPERATURE 20 -10 2.8 g S Vec12V, fmlkHz, Vie=560mV, Monaural a 248 Put into temperature test chamber =z on standard circuit (include external parts) eS Crer=470pF (OPPM/C), VRiei=5kQ( +100PPM/C) a 2.0 Zz g & C.B % S$ * 21 s : a 2 21.2 3 3 2 2 a _ 3 08 2 = Z.42 e O4n 0 Ambient Temperature Ta (C) S EXTERNAL COMPONENTS Parts | Recommended Influence N Val Purpose Remarks . atue Larger than Recommended Value | Smaller than Recommended Value Rio 3.9kO, . Decrease in output dynamic . Rios 3 9kQ Load resistor of decoder range. Output is clipped Decrease in Gy Determination of free-run Difficulty of frequency . Rio 16k frequency of V.C.O adjustment Degradation of df/d Tamb. Rush current limiter of . Increase in rush current Rios 2001) stereo indicating Lamp Decrease in lamp current damage to IC 5k. Adjustment of free-run . sg: . . . Use VRior (B-type) frequency of V.C.O Adjustment becomes critical Adjustment impossiblle palladium Ri 1kQ Cres On25HF Composition of LPF in PLL Increase in lock-up time of PLL. Increase in T.H.D 106 . . . . Poor low-frequency Cros 2.2HF Input Coupling Capacitor Large pop noise choracteristics Determination of free-run . . . . Use a Cio7 470pF frequency of V.C.O Decrease in PLL loop gain Increase in PLL loop gain stroke C08 0.25KF Loop filter of lamp driver Delay in lamp on Lamp miss-on HITACHI 33