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| Ordering number : EN5642 Monolithic Linear IC LA7289 VCR Audio Signal Record and Playback Processor Overview 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. Features * 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 V rms * Value of the ALC detector capacitor reduced (to 3.3 F) * 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 = 25C Parameter Maximum supply voltage Pin 2 input voltage Pin 2 input current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max VIN2 IIN2 Pd max Topr Tstg Ta 65 C DC Conditions Ratings 14 45 1.5 500 -10 to +65 -55 to +150 Unit V Vp-p mA mW C C Operating Conditions at Ta = 25C Parameter Recommended supply voltage Allowable operating voltage range Symbol VCC VCCop Conditions Ratings 9, 12 8.5 to 12.5 Unit V 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 = 25C, VCC = 12 V, f = 1 kHz, 0 dBV = 1.0 Vrms Parameter Current drain (EE) Current drain (playback) Current drain (record) [Equalizer amplifier] Open-circuit voltage gain Input noise voltage [Line Amplifier] Voltage gain (PB input) Voltage gain (LINE input) Voltage gain (TUNER input) Harmonic distortion Output noise voltage Maximum output voltage Output voltage when ALC operating ALC effect Total harmonic distortion when ALC operating [Record Amplifier] Voltage gain Harmonic distortion Maximum output voltage [REC/EE Switching Circuit] Record mode hold voltage EE mode hold voltage [Muting Circuit] On state hold voltage Off state hold voltage Muting attenuation (PB, LINE. TUNER) [PB, LINE. TUNER Switching Circuit] PB mode hold voltage LINE mode hold voltage TUNER mode hold voltage [EP. LP. SP Switching Circuit] EP mode hold voltage LP mode hold voltage SP mode hold voltage [Switching Circuit] Pin 2 on resistance Pin 2 input voltage [Record Bias Automatic Adjustment Circuit] Record bias current Pin 1 output control range IB V1 220 2.0 245 4.0 270 6.0 A V RON2 VIN2 I1 = 1 mA Ta = 65C, f = 70 kHz (sin), ILK = 10 A - - 10 - 30 45 V VEE VEL VEE The pin 16 DC voltage The pin 16 DC voltage The pin 16 DC voltage 3.6 1.8 0 - - - 6.0 2.6 0.8 V V V VLP VLL VLT The pin 17 DC voltage The pin 17 DC voltage The pin 17 DC voltage 3.6 1.8 0 - - - 6.0 2.6 1.0 V V V VMON VMOFF MP, ML, MT The pin 18 DC voltage The pin 18 DC voltage 3.6 0 80 - - 90 6.0 1 - V V dB VRR VRE The pin 19 DC voltage The pin 19 DC voltage 3.6 0 - - 6.0 1 V V VGCR THDR VOMR VO = -6dBV VO = -6dBV THD = 1% 13.5 - 1.7 14.0 0.05 2.5 14.5 0.3 - dB % Vrms VGLP VGLL VGLT THDL VNOL VOML VOA ALC THDA VO = -6dBV VO = -6dBV VO = -6dBV VO = -6dBV Rg = 620 , DIN audio filter THD = 1% VIN = -25dBV VIN = -25dBV to -5dBV VIN = -25dBV 20.1 20.1 20.1 - - 1.7 -7 - - 20.6 20.6 20.6 0.05 -75 2.5 -6 1 0.05 21.1 21.1 21.1 0.3 -69 - -5 3 0.6 dB dB dB % dBV Vrms dBV dB % VGOE VNIE VO = -6dBV Rg = 620 , DIN audio filter 58.4 - 64.4 1.0 - 1.8 dB Vrms Symbol ICCE ICCP ICCR No signal No signal No signal Conditions Ratings min 10.0 11.2 9.6 typ 12.5 14.0 12.0 max 15.0 16.8 14.4 Unit mA mA mA No. 5642-2/11 LA7289 Test Circuit No. 5642-3/11 LA7289 Switching Operations Test item (signal) ICCE ICCP ICCR VGOE VNIE VGLP, THDL, VOML VGLL VGLT VNOL VOA, ALC, THDA VGCR, THDR, VOMR MP ML MT IB V1 SW1 2 2 2 1 2 2 2 2 2 2 2 1 2 2 2 2 SW2 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 SW3 3 3 3 3 3 2 3 3 3 3 3 1 3 3 1 1 SW4 2 2 2 2 2 2 2 2 2 1 2 2 2 2 2 2 SW5 2 2 2 2 2 2 2 1 2 1 2 2 2 1 2 2 SW6 2 2 2 2 2 2 1 2 2 2 2 2 1 2 2 2 VM GND GND GND GND GND GND GND GND GND GND GND 5V 5V 5V GND GND VP GND 5V GND 5V 5V 5V 2V GND GND GND GND 5V 2V GND GND GND VR GND GND 5V GND GND GND GND GND GND GND 5V GND GND GND 5V 5V Input VIN1 VIN2 VIN4 VIN3 VIN3 VIN5 VIN1 VIN4 VIN3 Measurement IO IO IO VO 1 VO1 VO 2 VO 2 VO 2 VO2 VO 2 VO 3 VO 2 VO 2 VO 2 VO4 V1 Head Coil Specifications 1. Application circuit 1 (Series erase head type) * R/P Head * AE Head * FE Head 58 k 15 % (f = 70 kHz) 34 20 % (f = 70 kHz) 80 15 % (f = 70 kHz) * Oscillator coil test number: 15419A, Model no. 7QM3 Pin No. Line type Total windings 3-2 2UEW-0.09 32T 2-1 2UEW-0.09 20T 6-5 2UEW-0.09 176T 5-4 2UEW-0.09 29T 2 Application circuit 2 (Parallel erase head type) * R/P Head * AE Head * FE Head 58 k 15 % (f = 70 kHz) 180 20 % (f = 70 kHz) 80 15 % (f = 70 kHz) * Oscillator coil test number: 15415A, Model no. 7QM3 Pin No. Line type Total windings 3-2 2UEW-0.10 10T 2-1 2UEW-0.10 22T 4-5 2UEW-0.10 104T 5-6 2UEW-0.10 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 Record Control voltage Internal circuit A06818 2 Head switch (high voltage) Playback On Record, EE Off On resistance 10 (typical) Withstand voltage when off 45 V (f = 70 kHz) 3 GND Ground used for the pin 2 head switching circuit and the EQ amplifier. 4 EQ amplifier input Inputs the playback from the head with an input impedance of 120 k (typical). A06819 Continued on the next page. No. 5642-7/11 LA7289 Continued from the preceding page. Pin No. 5 Function EQ AMP NFB Function description Negative feedback for the EQ amplifier. Internal circuit A06820 6 EQ switch 1 Switches the playback EQ amplifier high-frequency voltage gain. LP, SP On EP Off On resistance 20 (typical) A06821 7 EQ amplifier output Output impedance 50 (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 k, a 0.1 F 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 k, a 0.1 F 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 k, a 0.1 F ceramic capacitor can be used as the coupling capacitor. 13 ALC detector input A06827 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 (typical) A06831 15 Record amplifier input Inputs the record signal from the line amplifier. A06833 The record current is set by the resistors R1 and R2. Since pin 15 has the high input impedance of 120 k, a 0.1 F ceramic capacitor can be used as the coupling 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 EP LP SP 24 24, 6 6 PB 24 6 6 A06834 A06832 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: 3.6 to 6.0 V: Muting will be on. 0.0 to 1.5 V: Muting will be off. Internal circuit 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) 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. 21 Power supply for all circuit blocks A06838 22 Record amplifier output Output impedance 50 (typical) A06839 23 Record bias automatic control input and playback switch EE and playback modes On Record mode Off On resistance 20 (typical) A06840 24 EQ switch 2 This pin switches the high-band peaking frequency in record and playback modes. REC EP LP SP On On Off PB On Off Off On resistance: 30 (typical) A06841 No. 5642-10/11 LA7289 s 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. s Anyone purchasing any products described or contained herein for an above-mentioned use shall: 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: 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. s 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 |
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