LINEAR INTEGRATED CIRCUIT

Transcription

1 DUAL RECORDING/PLAYBACK PRE-AMPLIFIER IC FOR CASSETTE DESCRIPTION The AN7316 is an integrated circuit for radio cassette recorder and built-in only fundamental function of rec./playback pre-amp. With ALC function in -channel 16- pin DIP plastic package. FEATURES *Built-in ALC LOW CUT function *Rec. Amp gain fixed and external parts reduced *Wide operating supply voltage range (V~1V) DIP-16 BLOCK DIAGRAM Input Negative Feedback input NC Vret Vcc Pre- REC. R.R. Pre- REC. ALC Input Negative Feedback input Low Cut ALC Time Constant GND ABSOLUTE MAXIMUM RATINGS (Ta=5 C) Characteristic Symbol Value Unit Supply ltage Vcc 1 V Supply Current Icc 3 ma Power Dissipation PD 1, mw Operating Temperature Topr -~+75 C Storage Temperature Tstg -55~+15 C RECOMMENDED OPERATING RATINGS (Ta=5 C) Characteristic Symbol Value Unit Operating Supply ltage Range Vcc 3.5~1 V 1

2 ELECTRICAL CHARACTERISTICS (, f=1khz,fmod=1khz, Ta=5 C,unless otherwise specified) Characteristic Symbol Condition Min Typ. Max Unit No Signal Current Consumption Itot ma () Open Circuit Gain GVO-p RNF 75 8 db Closed Circuit Gain GVC-p NAB 3 6 db Max. Output ltage m-p =3% V Total Harmonic Distortion -p Hz~8kHz.38.1 % Noise ltage Referred To Input Vni-p Rin=.kΩ,DIN/AUDIO 1.1 µv Crosstalk Between Channels CT-p Rin=.kΩ,DIN/AUDIO db Channel Balance CB-p db (Rec. Amp) Closed Circuit Gain Gv-r db Max. Output ltage m-r =3% V Total Harmonic Distortion -r Hz~8kHz.1.17 % Output Noise ltage Vno-r Rin=3kΩ,DIN/AUDIO 6 55 µv Crosstalk Between Channels CT-r Rin=3kΩ,DIN/AUDIO 5 51 db Channel Balance CB-r db (ALC) ALC Start ltage Vs Rin=5.6kΩ,Dual Ch. Input V ALC Effective Width WALC Rin=5.6kΩ,Dual Ch. Input 35 6 db ALC Channel Balance CB-a Rin=5.6kΩ,Dual Ch. Input -.1 db APPLICATION CIRCUIT Pre-in R 7pF µf 8kΩ 15kΩ 5.3kΩ T L S.µF 1µF 5.6kΩ 1pF Line-in R Rec-out R NC µf Power AN7316 Pre-in L 7pF µf.µf 1µF 5.6kΩ 1pF 39pF Rec-out L.MΩ ON OFF S3 GND Power 8kΩ 15kΩ 5.3kΩ T S1 L Line-in L

3 PIN DESCRIPTIONS Pin No. Pin Name Typ. Waveform Description Equivalent Circuit Input Input Negative Feedback Negative Feedback Output Output Rec. Input Rec. Input -3.6dBV DC.7V dbv -39dBV amp. Input amp. feedback amp. Rec.amp.input 3kΩ 1/16 6kΩ /15 /13 1 1Ω 3/1 5 1 Rec. Output Rec. Output dbv Rec.amp. 5 1/Vcc 5 5/1 6 Low CUT DC about.5v AGC comparator circuit reference voltage REC 6 7 ALC Time Constant Follow input signal Low-pass filter pin kω 1.kΩ 1.kΩ 7 8 GND Main circuit GND Vcc DC 6V Main circuit +Vcc Vcc 1 Vret DC 3.7V NC

4 TYPICAL PERFORMANCE CHARACTERISTICS Current Consumption,Icc(mA) ALC ON No signal Maximum ltage,max(v) =3% No filter Closed ircuit Gain,(dB) =3% No filter Total Harmonic Distortion,(%) Closed Circuit Gain,(dB) Total Harmonic Distortion,(%) Closed Circuit Gain,(dB) Rec.amp.1 3 BPF=3Hz 3Hz~kHz ~khz (3Hz~kHz, BPF ON) BPF ON Frequency,(Hz) Frequency,(Hz) Input ltage,vin(mv) Output ltage,(v) Total Harmonic Distortion,(%) No Filter Maximum ltage,max(v) Rec. Amp =3% Closed Circuit gain,(db) (No Filter) (3Hz~kHz,BPF ON) Total Harmonic Distortion,(%) Closed Circuit gain,(db) Rec.Amp =1V ALC OFF (No Filter) (3Hz~kHz,BPF ON) Frequency,(Hz) Total Harmonic Distortion,(%)

5 TYPICAL PERFORMANCE CHARACTERISTICSCONTINUED Output ltage,(v) Total Harmonic Distortion,(%) Frequency,(Hz) Output ltage,(v) Total Harmonic Distortion,(%) Hz~kHz BPF ON Rec.amp BPF=3Hz~kHz ALC OFF Input ltage,vin(mv) 16-DIP-P degree.6 5