TA8721ASN TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC TA8721ASN DUAL SIF SYSTEM FOR TV FEATURES l Two channel SIF circuit (The 2ch demodulation circuit can be configured in combination with the TA8712N or TA8796N.) l Three stage limiter amplifier l Quadrature type detection circuit l No-adjustment type FM detector circuit by ceramic discriminator BLOCK DIAGRAM Weight : 0.71g (Typ.) 000707EBA1 · TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or damage to property. 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No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others. · The information contained herein is subject to change without notice. 2001-02-06 1/9 TA8721ASN TERMINAL FUNCTION PIN No. PIN NAME FUNCTION 1 Limiter Input (1) A sound carrier is input from SAW filter. 2 5 De-Emphasis (1) Sound Output (1) The De-Emphasis time constant is defined by external capacitor. This is an FM detector circuit output terminal. 3 4 Limiter Output (1) SoundDetection(1) This is a connection terminal of sound detection coil. This will be of no-adjustment type by using ceramic discriminator. A sound muting will be performed by connecting pin 4 to GND. 6 SIF GND Connect a bypass capacitor between this pin and SIF VCC of pin 12. INTERFACE CIRCUIT ― 2001-02-06 2/9 TA8721ASN PIN No. PIN NAME FUNCTION Sound Output (2) De-Emphasis (2) This is an FM detector circuit output terminal. The De-Emphasis time constant is defined by external capacitor. 8 9 Sound Detection (2) Limiter Output (2) This is a connection terminal of sound detection coil. This will be of no-adjustment type by means of ceramic discriminator. A sound muting will be performed by connecting pin 8 to GND. 11 Limiter Input (2) A sound carrier is input from the SAW filter. 12 SIF VCC Connect a bypass capacitor between this pin and SIF GND of pin 6. 7 10 INTERFACE CIRCUIT ― 2001-02-06 3/9 TA8721ASN MAXIMUM RATINGS (Ta=25°C) CHARACTERISTIC SYMBOL RATING UNIT VCC 15 V PD (Note) 890 mW Operating Temperature Topr −20~75 °C Storage Temperature Tstg −55~150 °C Supply Voltage Power Dissipation Note: When using the device at above Ta=25°C, decrease the power dissipation by 7.14mW for each increase of 1°C. RECOMMENDED SUPPLY VOLTAGE PIN No. PIN NAME MIN. TYP. MAX. UNIT 12 VCC 8.1 9.0 9.9 V ELECTRICAL CHARACTERISTICS DC CHARACTERISTICS (Unless otherwise specified VCC=9V, Ta=25°C) CHARACTERISTIC Supply Voltage Terminal Voltage TEST CIRCUIT TEST CONDITION MIN. TYP. MAX. UNIT 1 ― 13 18 23 mA V1 ― 2.7 3.0 3.3 V2 ― 4.1 5.1 6.1 V3 ― 2.7 3.7 4.7 V4 ― 2.3 2.9 3.6 V5 ― 3.5 4.5 5.5 ― 3.5 4.5 5.5 V8 ― 2.3 2.9 3.6 V9 ― 2.7 3.7 4.7 V10 ― 4.1 5.1 6.1 V11 ― 2.7 3.0 3.3 SYMBOL ICC V7 1 2001-02-06 V 4/9 TA8721ASN AC CHARACTERISTICS (When using the specified coil unless otherwise specified, VCC=9V, Ta=25°C) CHARACTERISTIC SYMBOL Audio Frequency Output Level (Note 1) VOD1 Audio Frequency Distortion Rate THD1 (Note 2) VOD2 THD2 VLIM1 Limiting Sensitivity (Note 3) AMR (Note 4) Audio Frequency Bandwidth (Note 5) VLIM2 AMR1 AMR2 AFBW1 AFBW2 TEST CIRCUIT 2 2 2 2 2 (Note 6) 2 S / N2 Crosstalk Between Sound Outputs (Note 7) Limiter Input Resistance (Note 8) CR2 Ri1, Ri2 350 500 700 500 700 fo=4.5MHz ― 0.2 1.0 fo=4.724MHz ― 0.2 1.0 When output VOD1 is −3dB. ― ― 50 When output VOD2 is −3dB. ― ― 50 fo=4.5MHz, AM=30% 40 50 ― fo=4.724MHz, AM=30% 40 50 ― −3dB bandwidth ±70 ― ― −3dB bandwidth ±70 ― ― 60 ― ― 60 ― ― 60 ― ― 60 ― ― CW against FM 25kHz / dev fo=4.724MHz, SIF2 fo=4.724MHz, CW SIF1 fo=4.5MHz, CW SIF2 fo=4.724MHz, fm=400Hz 2 MAX. 350 SIF1 fo=4.5MHz, fm=400Hz 2 TYP. fo=4.5MHz, Vi=100dBµV CW against FM 25kHz / dev CR1 MIN. fo=4.724MHz, Vi=100dBµV fo=4.5MHz, S / N1 S / N Ratio TEST CONDITION ― UNIT mVrms % dBµV dB kHz dB dB 0.75 1.0 1.25 kΩ TEST CONDITION Note 1: Note 2: Note 3: Audio Frequency Output Level Limiter input VOD1 : fo=4.5MHz, 100dBµV, fm=400Hz, 100% (25kHz / dev) FM modulation VOD2 : fo=4.724MHz, 100dBµV, fm=400Hz, 100% (25kHz / dev) FM modulation After the above input, measure the output level of sound output. Audio Frequency Distortion Rate Measure the distortion rate of sound output by distortion meter under the condition of Note 1. Limiting Sensitivity Limiter input VLIM1 : fo=4.5MHz, variable level, fm=400Hz, 100% (25kHz / dev) FM modulation VLIM2 : fo=4.724MHz, variable level, fm=400Hz, 100% (25kHz / dev) FM modulation After the above input, measure the output level of sound output. Measure the input level of Note 1 output level at −3dB. 2001-02-06 5/9 TA8721ASN Note 4: AMR Limiter input AMR1 : fo=4.5MHz, 100dBµV, fm=400Hz, 30% AM modulation AMR2 : fo=4.724MHz, 100dBµV, fm=400Hz, 30% AM modulation After the above input, measure the output level of sound output. (AMout) Calculate the ratio of the output level of Note 1. AMR = 20log Note 5: Note 6: Audio Frequency Bandwidth Limiter input AFBW1 : fo variable (center 4.5MHz), 100dBµV, fm=400Hz, 100% (25kHz / dev) FM modulation AFBW2 : fo variable (center 4.724MHz), 100dBµV, fm=400Hz, 100% (25kHz / dev) FM modulation After the above input, measure the output level of sound output. Calculate the frequency width when the output level of Note 1 becomes −3dB by changing the fo frequency high and low. S / N Ratio Limiter input S / N (1) : fo=4.5MHz, 100dBµV CW S / N (2) : fo=4.724MHz, 100dBµV CW After the above input, measure the output level of sound output (S / N out). Calculate the ratio of the output level of Note 1. S / N = 20log Note 7: AMout VOD VOD S / N out Cross Talk between sound outputs Limiter input SIF1 fo=4.5MHz, 100dBµV, fm=400Hz CR1: SIF2 fo=4.724MHz, 100dBµV, CW SIF1 fo=4.5MHz, 100dBµV, CW CR2: SIF2 fo=4.724MHz, 100dBµV, fm=400Hz After the above input, measure the output leakage level of sound output. CR1 (2) = 20log Note 8: SIF 1 (2) SIF 2 (1) Limiter input resitance Measure the resistance of limiter input terminal by impedance analyzer. 2001-02-06 6/9 TA8721ASN TEST CIRCUIT 1 DC characteristics TEST CIRCUIT 2 AC characteristics 2001-02-06 7/9 TA8721ASN APPLICATION CIRCUIT TA8712N /TA8796N TA8721ASN 2001-02-06 8/9 TA8721ASN PACKAGE DIMENSIONS SSIP12-P-1.78 Weight : 0.71g Unit: mm (Typ.) 2001-02-06 9/9