TDA7284 SGS-Thomson-Microelectronics, TDA7284 Datasheet
TDA7284
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TDA7284 Summary of contents
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... CORDING) BUILT-IN ALC CIRCUITRY GOOD SVR DC CONTROLLED SWITCHES FOR MUTE OR EQUALIZATION SWITCHING FUNC- TIONS DESCRIPTION The TDA7284 is a monolithic integrated circuit in a DIP/SO-14designed for 6V, 9V and 12V AC/DC portable cassette equipment application. BLOCK DIAGRAM May 1997 TDA7284 DIP14 SO14 ORDERING NUMBER: ...
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... TDA7284 PIN CONNECTION (Top view) ABSOLUTE MAXIMUM RATINGS Symbol V Supply Voltage S T Operating Temperature Range Storage and Junction Temperature Range stg j THERMAL DATA Symbol Description R Thermal Resistance Junction-ambient th j-amb DC CHARACTERISTICS ( amb Terminal No Terminal Voltage ( 2/14 Parameter Max = 6V ...
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... Figure 1: Test and Application Circuit TDA7284 3/14 ...
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... TDA7284 Figure 2: P.C. Board and Component Layout of the Circuit of Fig. 1 (1:1 scale). 4/14 ...
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... O rms ALC = 100mV 3dB O ALC 120Hz SVR V = 100mV 10K R g ALC = Off ALC OFF I = < 10K L Figure 4: Recording Closed Loop Gain vs. Frequency TDA7284 Typ. Max. Unit 4 1 1.2 1.8 V rms 0.7 0.9 1.1 V rms ...
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... TDA7284 Figure 5: Playback Closed Loop Gain vs Frequency Figure 7: Output Voltage vs. Input Voltage Figure 9: Output Voltage vs. Input Voltage 6/14 Figure 6: Normalized Output Voltage vs. Supply Voltage Figure 8: Output Voltage vs. Input Voltage Figure 10: Distortion vs. Input Voltage ...
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... Figure 11: Distortion vs. Input Voltage Figure 13: Crosstalk vs. Frequency (ALC = Off) Figure 12: SVR vs. Frequency (ALC = Off) Figure 14: Crosstalk vs. Frequency (ALC = Off) TDA7284 7/14 ...
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... Before presenting the ALC circuit of TDA7284 it is worth describing the operation of the automatic level control as a system.A diagram showing the basis of operation is given in fig.16. ...
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... Vi. In this case too, if this time is too long the signal to noise ratio on the tape de- teriorates too short the sensation of the low signal level is lost during playback. The ALC system of the TDA7284 Fig. 16 becomes the following (fig. 19) where the TDA7284 9/14 ...
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... Two DC-controlled switches are also included in the chip (fig Fig. 19 shows the typical application circuit of the TDA7284 utilizing the equalization switch for nor- mal or chrome tape playback equalization.The advantage is the components can be placed near Figure 21: Application Circuit with DC Switching of Normal/Chrome Tape Equalization ...
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... Figure 22: Application Circuit with Output Muting SVR A refernce circuit is enclosed to provide a stable voltage and to supply a stable current to all cur- rent mirrors. SVR capacitor is also connected to this block for good ripple rejection. TDA7284 11/14 ...
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... TDA7284 DIP14 PACKAGE MECHANICAL DATA DIM. MIN. TYP. a1 0. 2.54 e3 15. 1.27 12/14 mm MAX. MIN. 0.020 1.65 0.055 0.5 20 8.5 7.1 5.1 3.3 2.54 0.050 inch TYP. MAX. 0.065 0.020 0.010 0.787 0.335 0.100 0.600 0.280 0.201 0.130 0.100 ...
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... SO14 PACKAGE MECHANICAL DATA DIM. MIN. TYP 0 0. 8.55 E 5.8 e 1.27 e3 7.62 F 3 MAX. MIN. 1.75 0.2 0.004 1.6 0.46 0.014 0.25 0.007 0.5 45 (typ.) 8.75 0.336 6.2 0.228 4.0 0.15 1.27 0.020 0.68 8 (max.) TDA7284 inch TYP. MAX. 0.069 0.008 0.063 0.018 0.010 0.020 0.344 0.244 0.050 0.300 0.157 0.050 0.027 13/14 ...
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... TDA7284 Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specification mentioned in this publication are subject to change without notice ...