NTE1710 Integrated Circuit Record/Playback Circuit for VCR Description: The NTE1710 is an integrated circuit in a 22–Lead DIP type package designed for tape recorder and VCR audio recording and playback. This device has built–in electronic switches for recording and playback which include the ones for a noise reduction circuit. Features: D Electronic Switches for REC/PLAY Operation Included (Noise–Reduction Switches also Possible) D Low Noise (Noise Voltage Referred to Input = 0.95µV P.B., Rg = 2.2kΩ, 20Hz to 20kHz) D Almost All Functions Necessary for REC/PLAY operation and AGC Circuit Included D Low Current Consumption D Muting Possible Externally Absolute Maximum Ratings: (TA = +25°C unless otherwiser specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.4V Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 700mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C Electrical Characteristics: (VCC = 9V, TA = +25°C unless otherwise specified) Parameter Symbol Closed Loop Output Voltage On Playback Mode VO(PB) On Record Mode VO(REC) Total Harmonic Distortion THD Maximum Output Voltage Line Output VO(max) Min Typ Max Unit P.B., Line Out, Vi = 1kHz, 0.158mV 420 500 594 mV Rec., Rec Out, AGC: OFF, Vi = 1kHz, 0.315mV 315 445 628 mV – 0.06 0.1 % P.B., f = 1kHz, THD = 1% 1.7 2.2 – Vrms Rec., f = 1kHz, THD = 1% 1.7 2.2 – Vrms P.B., Rg = 2.2kΩ, f = 20Hz to 20kHz – 3.0 5.5 mV Record MIC Input Rec., Rg = 2.2kΩ, f = 20Hz to 20kHz – 1.5 2.5 mV Record Line Input Rec., Rg = 0, f = 20Hz to 20kHz – 0.14 0.3 mV Playback Head Input P.B., Rg = 0, f = 20Hz to 20kHz – 1.7 3.0 mV Recording Output Output Noise Voltage Playback Head Input Vno Test Conditions P.B., Line Out, Vi = 1kHz, 1.58mV Note 1. A capacitor of 10µF or over must be used between Pin11 and GND for the purpose of preventing the AGC circuit oscillation when it is actually used. Electrical Characteristics (Cont’d): (VCC = 9V, TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit AGC Output Voltage VO(AGC) Rec., AGC: ON, Rec. Out, Vi = 1kHz, 0.315mV 315 445 570 mV Rec., AGC: ON, Rec. Out, Vi = 1kHz, 31.5mV 700 825 950 mV – 0.15 0.3 % – 1.0 6.0 mV P.B., Line Out, Vi (MIC Input) 1kHz 31.5mV, P.B. Input Shorted – 1.8 10 mV VLeak(Mute) Rec., Rec Out, Vi (MIC Input) 1kHz 0.5mV, P.B. Input Shorted – 50 100 µV 5.5 9.0 12.5 mA V18–P 0 – 0.7 V V18–R 3.5 – 7.0 V V17–OFF 0 – 0.9 V V17–ON 2.4 – 4.0 V AGC Distortion THD–A R/P–SW Leakage Voltage Muting ON Leakage Voltage Total Supply Current Itot Mode handling Voltage Playback Mode Record Mode Muting Holding Voltage OFF Mode ON Mode VLeak(P/R) Rec., Rec Out, Vi (PB Input) 1kHz 16mV, Rec. Input Shorted P.B., Mute: OFF Note 1. A capacitor of 10µF or over must be used between Pin11 and GND for the purpose of preventing the AGC circuit oscillation when it is actually used. Pin Connection Diagram EQ Input EQ Neg Feedback EQ Output Buffer Input (Playback) Buffer Feedback (Record) Buffer Output Line Input (Record) Line Input (Playback) Line Output GND AGC Control 1 2 3 4 5 6 7 8 9 10 11 22 21 20 19 18 17 16 15 14 13 12 MIC Input MIC Neg Feedback MIC Output AGC Input Record/Playback Switch Muting Switch Rec Input Rec Neg Feedback Rec Output Reference Voltage VCC 22 12 .410 (11.41) 1 11 .400 (10.16) 1.300 (33.0) .216 (5.5) .100 (2.54) 1.000 (25.4) .110 (2.79)