Ordering number : EN5642 Monolithic Linear IC LA7289 VCR Audio Signal Record and Playback Processor Overview Features The LA7289 includes on chip all functions required for the record and playback of VCR audio signals and achieves complete adjustment-free operation by the adoption of an automatic record bias current adjustment circuit. In addition, the inclusion of a switching circuit for switching between tuner and line input in addition to the circuits provided by earlier ICs makes the LA7289 truly optimal for audio VCR products. • Adjustment-free record bias current (automatic adjustment circuit adopted) • Built-in record bias oscillator circuit power supply switch • Record equalizer choke coil no longer required • Playback amplifier input noise voltage: 1.0 µV rms • Value of the ALC detector capacitor reduced (to 3.3 µF) • Built-in high-voltage head switching circuit • Supply voltage: supports both 9 and 12-V operation • Built-in input switching circuit (for the line and tuner inputs) Functions • • • • • • • • • • Equalizer amplifier Ripple filter Record/playback switching circuit Muting SP/LP/EP switching circuit Record amplifier ALC Tape head switching circuit Automatic record bias adjustment circuit Input switching circuit (line/tuner) Package Dimensions unit: mm 3067-DIP24S [LA7289] SANYO: DIP24S Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Symbol Conditions Ratings VCC max Pin 2 input voltage Pin 2 input current Allowable power dissipation VIN2 DC IIN2 Pd max Ta ≤ 65 °C Unit 14 V ±45 Vp-p ±1.5 mA 500 mW Operating temperature Topr –10 to +65 °C Storage temperature Tstg –55 to +150 °C Operating Conditions at Ta = 25°C Parameter Recommended supply voltage Allowable operating voltage range Symbol Conditions Ratings VCC VCCop Unit 9, 12 V 8.5 to 12.5 V SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 43097HA(OT) No. 5642-1/11 LA7289 Electrical Characteristics at Ta = 25°C, VCC = 12 V, f = 1 kHz, 0 dBV = 1.0 Vrms Parameter Symbol Conditions Ratings min typ Unit max Current drain (EE) ICCE No signal 10.0 12.5 15.0 mA Current drain (playback) ICCP No signal 11.2 14.0 16.8 mA Current drain (record) ICCR No signal 9.6 12.0 14.4 mA VGOE VO = –6dBV 58.4 64.4 – – 1.0 1.8 µVrms [Equalizer amplifier] Open-circuit voltage gain dB VNIE Rg = 620 Ω, DIN audio filter Voltage gain (PB input) VGLP VO = –6dBV 20.1 20.6 21.1 dB Voltage gain (LINE input) VGLL VO = –6dBV 20.1 20.6 21.1 dB Voltage gain (TUNER input) VGLT VO = –6dBV 20.1 20.6 21.1 dB Harmonic distortion THDL VO = –6dBV – 0.05 0.3 % Output noise voltage VNOL Rg = 620 Ω, DIN audio filter – –75 –69 dBV Input noise voltage [Line Amplifier] Maximum output voltage VOML THD = 1% 1.7 2.5 – Vrms Output voltage when ALC operating VOA VIN = –25dBV –7 –6 –5 dBV ALC effect ALC VIN = –25dBV to –5dBV – 1 3 dB THDA VIN = –25dBV – 0.05 0.6 % Voltage gain VGCR VO = –6dBV 13.5 14.0 14.5 dB Harmonic distortion THDR VO = –6dBV – 0.05 0.3 Maximum output voltage VOMR THD = 1% 1.7 2.5 – Total harmonic distortion when ALC operating [Record Amplifier] % Vrms [REC/EE Switching Circuit] Record mode hold voltage VRR The pin 19 DC voltage 3.6 – 6.0 V EE mode hold voltage VRE The pin 19 DC voltage 0 – 1 V On state hold voltage VMON The pin 18 DC voltage 3.6 – 6.0 V Off state hold voltage VMOFF The pin 18 DC voltage 0 – 1 V 80 90 – dB [Muting Circuit] Muting attenuation (PB, LINE. TUNER) MP, ML, MT [PB, LINE. TUNER Switching Circuit] PB mode hold voltage VLP The pin 17 DC voltage 3.6 – 6.0 V LINE mode hold voltage VLL The pin 17 DC voltage 1.8 – 2.6 V TUNER mode hold voltage VLT The pin 17 DC voltage 0 – 1.0 V EP mode hold voltage VEE The pin 16 DC voltage 3.6 – 6.0 V LP mode hold voltage VEL The pin 16 DC voltage 1.8 – 2.6 V SP mode hold voltage VEE The pin 16 DC voltage 0 – 0.8 V [EP. LP. SP Switching Circuit] [Switching Circuit] Pin 2 on resistance RON2 I1 = ±1 mA – 10 30 Ω Pin 2 input voltage VIN2 Ta = 65°C, f = 70 kHz (sin), ILK = 10 µA – – ±45 V [Record Bias Automatic Adjustment Circuit] Record bias current IB 220 245 270 µA Pin 1 output control range V1 2.0 4.0 6.0 V No. 5642-2/11 LA7289 Test Circuit No. 5642-3/11 LA7289 Switching Operations SW1 SW2 SW3 SW4 SW5 SW6 VM VP VR Input Measurement ICCE Test item (signal) 2 1 3 2 2 2 GND GND GND - IO ICCP 2 1 3 2 2 2 GND 5V GND - IO ICCR 2 1 3 2 2 2 GND GND 5V - IO VO 1 VGOE 1 2 3 2 2 2 GND 5V GND VIN1 VNIE 2 1 3 2 2 2 GND 5V GND - VO1 VGLP, THDL, VOML 2 1 2 2 2 2 GND 5V GND VIN2 VO 2 VGLL 2 1 3 2 2 1 GND 2V GND VIN4 VO 2 VGLT 2 1 3 2 1 2 GND GND GND VIN3 VO 2 VNOL 2 1 3 2 2 2 GND GND GND - VO2 VOA, ALC, THDA 2 1 3 1 1 2 GND GND GND VIN3 VO 2 VGCR, THDR, VOMR 2 1 3 2 2 2 GND GND 5V VIN5 VO 3 MP 1 1 1 2 2 2 5V 5V GND VIN1 VO 2 ML 2 1 3 2 2 1 5V 2V GND VIN4 VO 2 MT 2 1 3 2 1 2 5V GND GND VIN3 VO 2 IB 2 1 1 2 2 2 GND GND 5V - VO4 V1 2 1 1 2 2 2 GND GND 5V - V1 Head Coil Specifications 1. Application circuit 1 (Series erase head type) • R/P Head 58 kΩ ± 15 % (f = 70 kHz) • AE Head 34 Ω ± 20 % (f = 70 kHz) • FE Head 80 Ω ± 15 % (f = 70 kHz) • Oscillator coil test number: 15419A, Model no. 7QM3 Pin No. Line type Total windings 3-2 2-1 6-5 5-4 2UEW-0.09 2UEW-0.09 2UEW-0.09 2UEW-0.09 32T 20T 176T 29T 2 Application circuit 2 (Parallel erase head type) • R/P Head 58 kΩ ± 15 % (f = 70 kHz) • AE Head 180 Ω ± 20 % (f = 70 kHz) • FE Head 80 Ω ± 15 % (f = 70 kHz) • Oscillator coil test number: 15415A, Model no. 7QM3 Pin No. Line type Total windings 3-2 2-1 4-5 5-6 2UEW-0.10 2UEW-0.10 2UEW-0.10 2UEW-0.10 10T 22T 104T 22T For more information contact: Tokyo Parts Industries Co., Ltd. Telephone: +81-270-25-1191 No. 5642-4/11 LA7289 Application circuit 1 (Series erase head type) No. 5642-5/11 LA7289 Application Circuit 2 (Parallel erase head type) No. 5642-6/11 LA7289 Block Diagram Pin Functions Pin No. 1 Function Record bias automatic control output Function description EE, playback → VCC Internal circuit Record → Control voltage A06818 2 Head switch (high voltage) Playback → On Record, EE → Off On resistance → 10 Ω (typical) Withstand voltage when off → ±45 V (f = 70 kHz) 3 GND 4 EQ amplifier input Ground used for the pin 2 head switching circuit and the EQ amplifier. Inputs the playback from the head with an input impedance of 120 kΩ (typical). A06819 Continued on the next page. No. 5642-7/11 LA7289 Continued from the preceding page. Pin No. 5 EQ AMP NFB Function Function description Negative feedback for the EQ amplifier. EQ switch 1 Switches the playback EQ amplifier Internal circuit A06820 6 high-frequency voltage gain. LP, SP → On EP → Off On resistance → 20 Ω (typical) A06821 7 EQ amplifier output Output impedance → 50 Ω (typical) A06822 8 Line amplifier playback input Inputs the playback signal from the EP amplifier. Since pin 8 has the high input impedance of 120 kΩ, a 0.1 µF ceramic capacitor can be used as the coupling capacitor. A06823 9 ALC FILTER Detection is performed using the capacitor connected between this pin and ground. The attack and recovery times are determined by the time constant of the RC circuit connected to this pin. A06824 10 Line amplifier tuner input Inputs the EE and record signal. A06826 The reference input is set by the resistors R1 and R2. The amplifier gain is fixed at 21.0 dB. Since pin 10 has the high input impedance of 120 kΩ, a 0.1 µF ceramic capacitor can be used as the coupling capacitor. A06825 11 GND Ground for all the circuit blocks except the pin 2 head switching circuit and the EQ amplifier. Continued on the next page. No. 5642-8/11 LA7289 Continued from the preceding page. Pin No. 12 Function Line amplifier line input Function description Inputs the EE and record signals. Internal circuit A06828 The reference input is set by the resistors R1 and R2. The amplifier gain is fixed at 21.0 dB. Since pin 12 has the high input impedance of 120 kΩ, a 0.1 µF ceramic capacitor can be used as the coupling A06827 capacitor. 13 ALC detector input A06830 Inputs the line amplifier output signal. The ALC level is determined by the resistors R1 and R2. A06829 14 Line amplifier output Output impedance → 50 Ω (typical) 15 Record amplifier input Inputs the record signal from the line A06831 amplifier. A06833 The record current is set by the resistors R1 and R2. Since pin 15 has the high input impedance of 120 kΩ, a 0.1 µF ceramic capacitor can be used as the coupling A06832 capacitor. 16 EP/LP/SP control If the pin 16 voltage is: 3.0 to 6.0 V: EP mode 1.8 to 2.6 V: LP mode 0.0 to 0.8 V: SP mode. Switch on state pin numbers: REC PB EP 24 24 LP 24, 6 6 SP 6 6 A06834 17 PB/LINE/TUNER control If the pin 17 voltage is: 3.6 to 6.0 V: PB mode 1.8 to 2.6 V: LINE mode 0.0 to 1.0 V: TUNER mode. A06835 Continued on the next page. No. 5642-9/11 LA7289 Continued from the preceding page. Pin No. 18 Function Muting control Function description When the pin 18 voltage is: Internal circuit 3.6 to 6.0 V: Muting will be on. 0.0 to 1.5 V: Muting will be off. A06836 19 Record/EE control When the pin 19 voltage is: 3.0 to 6.0 V: Record mode 0.0 to 1.0 V: EE mode A06837 20 Power supply (VCC) 21 Ripple filter VCC max = 14 V VCC = 8.5 V to 12.5 V Connect an electrolytic capacitor between this pin and ground to remove ripple from the power supply. Power supply for all circuit blocks A06838 22 Record amplifier output Output impedance → 50 Ω (typical) 23 Record bias automatic control input EE and playback modes → On and playback switch Record mode → Off A06839 On resistance → 20 Ω (typical) A06840 24 EQ switch 2 This pin switches the high-band peaking frequency in record and playback modes. REC PB EP On On LP On Off SP Off Off On resistance: 30 Ω (typical) A06841 No. 5642-10/11 LA7289 ■ No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. ■ Anyone purchasing any products described or contained herein for an above-mentioned use shall: ➀ Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: ➁ Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. ■ Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of April, 1997. Specifications and information herein are subject to change without notice. No. 5642-11/11