MITSUBISHI SOUND PROCESSOR ICs M62457FP Peak hold IC for 5 band spectrum analayzer displays DESCRIPTION PIN CONFIGURATION (TOP VIEW) The M62457FP is 5 band peak hold ICs that use microprocessor time division to produce serial output for spectrum analyzer displays. FEATURES • 5 band peak hold elements for spectrum analyzer displays. • Discharg time constant circuit for each band is on the chip. • Single 5V power supply. Vcc/2 1 16 GND2 VREF 2 15 PHOUT IREF 3 14 GND1 DIFOUT 4 13 ENB COUT 5 12 SELC CNF 6 11 SELB AOUT 7 10 SELA ANF 8 9 Vcc Outline 16P2N-A APPLICATION CD radio cassette players , mini-component stereo systems, car stereos RECOMMENDED OPERATING CONDITIONS Supply voltage range • • • • 4.5 to 6.5V Rated supply voltage • • • • 5.0V SYSTEM BLOCK DIAGRAM SELECTOR Audio signal BPF5 PeaK Hold5 Peak Hold output µ-com interfac SELA SELB SELC ENB ( 1 / 12 ) MITSUBISHI SOUND PROCESSOR ICs M62457FP Peak hold IC for 5 band spectrum analayzer displays PIN CONFIGURATION AND IC INTERNAL BLOCK DIAGRAM Vcc/2 1 Vcc/2 Gen. VREF 2 V REF Gen. 16 GND2 15 PHOUT SELECTEOR (VCC X 0.3 ) IREF 3 BPF IN DIFOUT TEST I REF Gen. 14 GND1 HOLD OUTPUT 13 ENB 4 Amp-D BPF 1 P.HOLD BPF 2 P.HOLD + COUT 12 SELC 5 Amp-C BPF 3 P.HOLD BPF 4 P.HOLD + CNF 11 SELB 6 BPF 5 AOUT P.HOLD <PEAK HOLD> 7 10 SELA Amp-A + ANF 8 HOLD C RESET 9 Vcc (Notes)f1=105Hz,f2=340Hz,f3=1KHz,f4=3.4KHz,f5=10.5KHz (The value is the design value) ( 2 / 12 ) MITSUBISHI SOUND PROCESSOR ICs M62457FP Peak hold IC for 5 band spectrum analayzer displays Functional description (1) Audio signal passes Amp-a and Amp-d, and it is input into BPF/peak hold circuit for spectrum analyzer. Basic use examples,the last output signal is input into A/D of microprocessor. Howevwe VCC,GND of analog series had better be common with VCC,GND of maicroprocessor. THe maicroprocessor does groundisolation to analog series. Amp-C is the input amplifier to reject common-mode signal (noise), it utilizes effect of common-mode rejection of Amp-D. (2) BPF/peak hold circuit is setting of 5 band spectrum analyzer < center frequency > f1=105Hz f2=340Hz f3=1KHz f4=3.4KHz f5=10.5KHz (The value is the design value) Center frequency and Q of BPF is done general setting of like next. w0=gm/C gm:matual condactance of inside amplifier circuit (It depends on outside resistor of Pin.No.3) C:inside capacitor Q=(R1+R2)/R1 ; it is fixed by inside resistor ratio. (The design value is 3.5) (3) The hold capasitor of peak hold circuit use inside capasitor. When a selection of hold output is over the reset signal of hold value, The reset signal is made automatically. (Discharge pulse : -3dBtyp. output value fall) (4) Output voltage of peak hold circuit is Vcc/2(Pin.No1) When it is selected by the optput select circuit, it is converted into the voltage of GND standard and outputs it in PHout (Pin.No.15). ( 3 / 12 ) MITSUBISHI SOUND PROCESSOR ICs M62457FP Peak hold IC for 5 band spectrum analayzer displays PIN DESCRIPTION 1 PIN No. Name I/O Function 1 Vcc / 2 I 1/2Vcc supply terminal 2 VREF I 0.3Vcc supply terminal 3 IREF I BPF center frequency setting current terminal 4 DIFOPUT O Output of amplifier (BPF input signal ) 5 COUT O Output of amplifier for analog COM series 6 CNF I Inverted input of amplifier for analog COM series 7 AOUT O Output of amplifier for analog signal series 8 ANF I Inverted input of amplifier for analog signal series 9 Vcc I System supply terminal 10 SELA I Output setting control terminal A ( logic input ) 11 SELB I Output setting control terminal B ( logic input ) 12 SELC I Output setting control terminal C ( logic input ) 13 ENB I Output setting control enble terminal ( logic input ) 14 GND1 I Ground1 ( it is assumed in the voltage same as PIN16 ) 15 PHOUT O Peak hold outout terminal 16 GND2 I Ground2 ( signal series ) ( 4 / 12 ) MITSUBISHI SOUND PROCESSOR ICs M62457FP Peak hold IC for 5 band spectrum analayzer displays PIN DESCRIPTION 2 PIN No. Name I/O 1 Vcc / 2 I Vcc 2 VREF I 180K 1 180K 3 IREF I 4 DIFOPUT O 5 COUT O 6 CNF I 7 AOUT O 8 ANF I 9 Vcc I 10 SELA I 11 SELB I 12 SELC I 13 ENB I 14 GND1 I 15 PHOUT O 16 GND2 I Peripheral circuit of pins 350K 2 3 150K GND2 Vcc/2 6 5 4 Vcc/2 8 7 10,11,12,13 VccX0.3 20K 10K VccX0.3 10K GND2 15 ( 5 / 12 ) MITSUBISHI SOUND PROCESSOR ICs M62457FP Peak hold IC for 5 band spectrum analayzer displays ABSOLUTE MAXIMUM RATINGS Symbol Vcc(max) Parameter Ratings Conditions 7 Supply Voltage Unit V Pd Power dissipation Ta ≤ 25°C 540 mW K Thermal derating Ta > 25°C 5.4 mW/°C Topr Operating temperature Tstg Vi(max) Vo(max) Storage temperature -20 to +75 °C -40 to +125 °C Allowable input voltage range GND-0.3 to Vcc+0.3 V Allowable output voltage range GND to Vcc V THERMAL DERATING (MAXIMUM RATING) 0.6 0.54 0.5 0.4 0.3 0.27 0.2 0.1 0 0 25 50 75 100 125 150 AMBIENT TEMPERATURE Ta [ °C ] ( 6 / 12 ) MITSUBISHI SOUND PROCESSOR ICs M62457FP Peak hold IC for 5 band spectrum analayzer displays Recommended oprating conditions ( Ta=25°C unless otherwise noted ) Parameter Supply voltage Symbol Conditions Vcc MIN TYP MAX 4.5 5.0 6.5 V Unit Logic input H level voltage VIH Vcc=5V 2.5 VCC V Logic input L level voltage VIL Vcc=5V GND 0.5 V (Note1) The center frequency characteristics of BPF are determined by the resistor connected between 3PIN terminal and GND.If it is necessary,use a variable resistor (note:all band will shift together). Q of BPF is fixed in 3.5 by inside circuit. (note 2) The output resistor of peak hold output(PIN 15) is 10KΩtyp. You do the input resistor of microprocessor side in a value fully big for 10KΩ. (note 3) Set up as the control voltage from a microprocessor during GND-0.3V and 5V. If the voltage of tolerance outside is added, conserve it resistance or diode. ( 7 / 12 ) MITSUBISHI SOUND PROCESSOR ICs M62457FP Peak hold IC for 5 band spectrum analayzer displays Output select logic table PHout (PinNo.15) ENB SELA SELB SELC Note GND(output stop) 0 X X X Don`t Care GND 1 0 0 0 f1 ; 105Hz 1 0 0 1 f2 ; 340Hz 1 0 1 0 GND 1 0 1 1 f3 ; 1KHz 1 1 0 0 GND 1 1 0 1 f4 ; 3.4KHz 1 1 1 0 f5 ; 10.5KHz 1 1 1 1 < Note1 > ”0”=low level,”1”=high level,”X”=”0”or ”1” < Note2 > you hold the output setting stare by more than 30µSec for a long time (When the output setting stare is short, movement of output value and reset signal become instable ) 90% PHout Ts(30µSec.MAX) fn SELECT (inside signal) < SELECT state > fn RESET (inside signal) < Outbreak automatic by inside circuit .> Tr(25µSec.TYP) ( 8 / 12 ) MITSUBISHI SOUND PROCESSOR ICs M62457FP Peak hold IC for 5 band spectrum analayzer displays Timing chart H ENB L H SELA X X X X X X L H SELB L H SELC L PH OUT f1 GND f2 f3 f4 f5 H f1 RESET (105Hz) L H f2 RESET L (340Hz) H f3 RESET L (1KHz) H f4 RESET (3.4KHz) L H f5 RESET (10.5KHZ) L ( 9 / 12 ) MITSUBISHI SOUND PROCESSOR ICs M62457FP Peak hold IC for 5 band spectrum analayzer displays ELECTRICAL CHARACTERISTICS (Ta=25°C, Vcc=5.0V,PHout(Pin.No.15) RL=1MΩ unless otherwise noted. VAIN=-30dBV, f=1KHz,ENB(Pin.No.13)=1) Parameter Symbol Condition Limis Min No signal, No select (ENB,SELA,SELB,SELC=0) Circuit current Icc Maximum output level Vo f1 to f5 Measured at each output (VAIN= -14dBV) Output offset voltage Vos f1 to f5 Measured at each output (No signal,ENB=0/1) Logic input H level VIH 2.5 Logic input L level VIL GND -0.3 Common-mode rejection ratio CMRR 2.7 typ Max 8 13 Unit mA V 3.5 30 60 5.0 Vcc +0.3 V 0 0.5 V 25 50 mV dB f1 output level Vo1 f1 (fin=105Hz) 0.5 1.0 1.70 V f2 output level Vo2 f2 (fin=340Hz) 0.5 1.0 1.70 V f3 output level Vo3 f3 (fin=1KHz) 0.5 1.0 1.70 V f4 output level Vo4 f4 (fin=3.4KHz) 0.5 1.0 1.70 V f5 output level Vo5 f5 (fin=10.5KHz) 0.5 1.0 1.70 V Output response time Ts The time from the rise of output selection until the rise of PHout(90% of peak) Discharge level DS < Reference > Inside reset signal Tr=25µsecTYP 20 -3 30 µsec dB ( 10 / 12 ) MITSUBISHI SOUND PROCESSOR ICs M62457FP Peak hold IC for 5 band spectrum analayzer displays TEST CIRCUIT Vcc/2 16 Vcc/2 Gen. 1 0.1µ GND2 VREF PHOUT 2 V REF Gen. 0.1µ SELECTEOR 15 1M (Vccx0.3) IREF I REF Gen. 3 100K 14 GND1 HOLD OUTPUT BPF IN DIFOUT 13 4 BPF 1 P.HOLD BPF 2 P.HOLD BPF 3 P.HOLD BPF 4 P.HOLD BPF 5 P.HOLD Px4 ENB Amp-D + COUT 12 5 Amp-C 100K IN SELC + CNF 0.47 11 6 39K AOUT <PEAK HOLD> 10 Amp-A 100K ANF AIN 8 Px2 SELB 7 0.47µ Px3 + Px1 SELA HOLD C RESET Vcc 9 39K 0.01µ 10µ Units resistance; Ω capacitance; F (11 / 12 ) MITSUBISHI SOUND PROCESSOR ICs M62457FP Peak hold IC for 5 band spectrum analayzer displays APPLICATION EXAMPLE Vcc/2 1 16 Vcc/2 Gen. 0.1µ GND2 VREF 2 V REF Gen. 0.1µ 15 SELECTEOR PHOUT (Vccx0.3) IREF I REF Gen. 3 100K 14 HOLD OUTPUT GND1 A/D BPF IN DIFOUT 13 4 BPF 1 P.HOLD BPF 2 P.HOLD BPF 3 P.HOLD BPF 4 P.HOLD BPF 5 P.HOLD Px4 ENB Amp-D + COUT 12 5 Amp-C 100K 0.47µ COM SELC + CNF MCU 11 6 270K/2 AOUT <PEAK HOLD> 10 Amp-A 100K 0.047µ ANF + Px1 SELA HOLD C RESET Vcc 9 8 0.047µ Px2 SELB 7 CH1 Px3 270K CH2 270K 0.01µ 10µ Units resistance; Ω capacitance; F ( 12 / 12 )