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| TDA7220 VERY LOW VOLTAGE AM-FM RADIO . . . . . . . OPERATING SUPPLY VOLTAGE : 1.5 TO 6V HIGH SENSITIVITY AND LOW NOISE LOW BATTERY DRAIN VERY LOW TWEET HIGH SIGNAL HANDLING VERY SIMPLE DC SWITCHING OF AM-FM AM SECTION OPERATES UP TO 30MHz DIP16 DESCRIPTION The TDA 7220 is a monolithic integrated circuit in a 16-lead dual in-line plastic package designed for use in 3V, 4.5V and 6V portable AM-FM radio receivers. The functions incorporated are : AM Section - Preamplifier and do uble balance d mixer with AGC - On pin local oscillator - IF amplifier with internal AGC - Detector and audio preamplifier FM SECTION - IF amplifier and limiter - Quadrature detector - Audio preamplifier PIN CONNECTION ORDERING NUMBER : TDA7220 SO16 ORDERING NUMBER : TDA7220D June1993 1/16 TDA7220 BLOCK DIAGRAM ABSOLUTE MAXIMUM RATINGS Symbol VS Ptot Toper Tstg, Tj Parameter Supply Voltage o Total Power Dissipation at Tamb < 110 C (DIP16) Operating Temperature Storage and Junction Temperature Value 6.5 400 - 20 to + 85 - 55 to +150 Unit V mW o C oC THERMAL DATA Symbol R th (j-a) Parameter Junction-ambient Thermal Resistance Max. DIP16 100 SO16 200 o Unit C/W 2/16 TDA7220 ELECTRICAL CHARACTERISTICS (Tamb = 25oC, VS = 3V, unless specified, refer to Test Circuit) Symbol ID Drain Current Parameter Test Conditions AM Section FM Section Min. Typ. 11 10 Max. 18 15 Unit mA mA V dB dB 80 0.6 m = 0.8, d < 10% m=0 m=0 VI = 1mV, m = 0.3 VI = 1mV, m = 0.3 0.5 7.5 18 4.5 40 55 110 mV % V k pF k dB dB V dB dB 1.5 90 % % mV k pF k AM SECTION (fO = 1MHz, fm = 1kHz) VI S/N VI VO d VH RI CI RO Input Sensitivity Signal to Noise AGC Range Recovered Audio Signal (Pin 9) Distortion Max. Input Signal Handling Capability Input Resistance between Pins 2 and 4 Input Capacitance between Pins 2 and 4 Output Resistance (Pin 9) Tweet 2 IF Tweet 3 IF FM SECTION (fO = 10.7MHz, fm = 1kHz) VI AMR S/N d VO RI CI RO Input Limiting Voltage Amplitude Modulation Rejection Signal to Noise Distortion Recovered Audio SIgnal (Pin 9) Input Resistance between Pin 16 and Ground Input Capacitance between Pin 16 and Ground Output Resistance (Pin 9) - 3dB limiting point f = 22.5kHz, VI = 3mV, m=3 f = 22.5kHz, VI = 1mV f = 22.5kHz, VI = 1mV f = 75kHz f = 22.5kHz, VI = 1mV 40 50 33 40 65 0.3 1.1 70 6.5 14 4.5 80 S/N = 26dB, m = 0.3 VI = 1mV, m = 0.3 VOUT = 10dB, m = 0.8 VI = 1mV, m = 0.3 40 90 40 12 50 25 3/16 TDA7220 ELECTRICAL CHARACTERISTICS (Tamb = 25oC, VS = 1.6V, unless specified, refer to Test Circuit) Symbol ID Drain Current Parameter Test Conditions AM Section FM Section Min. Typ. 8 7 Max. 15 13 Unit mA mA V dB dB 75 0.5 m = 0.8, d < 10% m=0 m=0 VI = 1mV, m = 0.3 0.5 7.5 18 4.5 40 55 mV % V k pF k dB dB V dB dB % mV k pF k AM SECTION (fO = 1MHz, fm = 1kHz) VI S/N VI VO d VH RI CI RO Input Sensitivity Signal to Noise AGC Range Recovered Audio Signal (Pin 9) Distortion Max. Input Signal Handling Capability Input Resistance between Pins 2 and 4 Input Capacitance between Pins 2 and 4 Output Resistance (Pin 9) Tweet 2 IF Tweet 3 IF FM SECTION (fO = 10.7MHz, fm = 1kHz) VI AMR S/N d VO RI CI RO Input Limiting Voltage Amplitude Modulation Rejection Signal to Noise Distortion Recovered Audio SIgnal (Pin 9) Input Resistance between Pin 16 and Ground Input Capacitance between Pin 16 and Ground Output Resistance (Pin 9) - 3dB limiting point f = 22.5kHz, VI = 3mV, m=3 f = 22.5kHz, VI = 1mV f = 22.5kHz, VI = 1mV f = 22.5kHz, VI = 1mV 50 34 55 0.6 55 6.5 14 4.5 S/N = 26dB, m = 0.3 VI = 1mV, m = 0.3 VOUT = 10dB, m = 0.8 VI = 1mV, m = 0.3 40 90 40 15 48 25 4/16 TDA7220 Figure 1 : Test Circuit Figure 2 : P.C. Board and Component Layout (1:1 scale) of the Test Circuit 5/16 TDA7220 AM-FM SWITCHING AM-FM switching is achieved by applying a DC voltage at pin 13, to switch the internal reference. TYPICAL DC VOLTAGE (refer to the test circuit) Pins AM FM 1 3 3 2 1.1 0 3 3 3 4 1.1 0 5 1.1 0 6 2.5 2.4 7 3 3 8 0.7 0 9 1.2 0.9 10 3 3 11 0 0 12 2.1 3 13 2.1 3 14 2.9 2.7 15 3 2.7 16 2.9 2.7 Unit V V APPLICATION SUGGESTION Recommended values referred to the test circuit of Figure 1 Part Number C1 C2 (1) C3 (1) C4 C5 C7 C8 C9 C10 (1) C11 C12 C13 C16 R1 (1) R2 (1) R3 R4 R5 R6 Recommended Value 100F 100nF 10nF 20nF 20nF 100nF 100nF 10F 56pF 10nF 100nF 220F 2.7nF 68 56 330 6.8k 560 13k Purpose AGC Bypass AM Input DC Cut FM Input DC Cut FM Amplifier Bypass FM detector Decoupling Power Supply Bypass AGC Bypass Tuning of the AM Oscillator at 1455kHz 50ms FM De-emphasis Output DC Decoupling Power Supply Decoupling AM Detector capacitor FM Input Matching AM Input Matching Ceramic Filter Matching FM Detector Coil Q Setting FM Detector Load Resistor AM Detector Coil Q Setting Audio output decrease and lower distortion Audio output decrease and higher AMR Lower IF Gain and Lower AGC Range Higher IF Gain and Lower AGC Range Audio output increase and higher distortion Low audio frequency cut Increase of the distortion at low frequency Low suppression of the IF frequency and harmonics Increase of the audion distortion Reduction of sensitivity Danger of RF Irradiation Noise increase of the audio output Increase of the distortion at low audio frequency Increase of the AGC time constant - bandwidth increase - higher noise Smaller than Recommended Value Increase of the distortion at low audio frequency Larger than Recommended Value Increase of the AGC time constant (1) Only for test circuit. 6/16 TDA7220 Figure 3 : Audio Output and Noise versus Input Signal (AM section) VS = 3V Figure 4 : Audio Output and Noise versus Input Signal (AM section) VS = 1.6V Figure 5 : Distortion versus Input Signal (AM section) VS = 3V Figure 6 : Distortion versus Input Signal (AM section) VS = 1.6V Figure 7 : Audio Output versus Supply Voltage (AM section) Figure 8 : Amplified AGC Voltage (Pin 4) versus Input Signal (AM section) 7/16 TDA7220 Figure 9 : Audio Output and Noise versus Input Signal (FM section) VS = 3V Figure 10 : Audio Output and Noise versus Input Signal (FM section) VS = 1.6V Figure 11 : Distortion versus Input Signal (FM section) VS = 3V Figure 12 : Distortion versus Input Signal (FM section) VS = 1.6V Figure 13 : Audio Output versus Supply Voltage (FM section) Figure 14 : Amplified AGC Voltage (Pin 4) versus Input Signal (FM section) 8/16 TDA7220 Figure 15 : DC Output Voltage (Pin 9) versus Supply Voltage (FM section) Figure 16 : AFC Output Voltage (Pin 9) versus Frequency Deviation (FM section) Figure 17 : Drain Current versus Supply Voltage APPLICATION INFORMATION TYPICAL PERFORMANCE OF THE RADIO RECEIVER OF FIGURE 18 (VS = 3V, RL = 32) Parameter Wavebands FM AM FM AM AM FM AM FM AM FM Test Conditions Value 87.5 to 108 510 to 1620 3 2 10 0.5 1.8 1.1 60 45 40 16 1.6 to 3 Unit MHz kHz V V V % % % dB dB dB mA V 9/16 Sensitivity Distortion (fm = 1kHz) Signal to Noise (fm = 1kHz) Amplitude Modulation Rejection Quiescent Current Supply Voltage Range S/N = 26dB, f = 22.5kHz S/N = 6dB, m = 0.3 S/N = 26dB, m = 0.3 f = 22.5kHz PO = 20mW f = 75kHz VI = 100V m = 0.3 f = 22.5kHz PO = 20mW VI = 100V m = 0.3 VI = 100V, f = 22.5kHz, m = 0.3 TDA7220 APPLICATION INFORMATION Figure 18 : Stereo AM/FM Miniradio 10/16 TDA7220 Figure 19 : 0.3W AM/FM Monoradio 11/16 TDA7220 TYPICAL APPLICATION 12/16 TDA7220 13/16 TDA7220 SO16 PACKAGE MECHANICAL DATA DIM. MIN. A a1 a2 b b1 C c1 D E e e3 F L M S 3.8 0.4 9.8 5.8 1.27 8.89 4.0 1.27 0.62 8 (max.) 0.150 0.016 10 6.2 0.35 0.19 0.5 45 (typ.) 0.386 0.228 0.050 0.350 0.157 0.050 0.024 0.394 0.244 0.1 mm TYP. MAX. 1.75 0.25 1.6 0.46 0.25 0.014 0.007 0.020 0.004 MIN. inch TYP. MAX. 0.069 0.009 0.063 0.018 0.010 14/16 TDA7220 DIP16 PACKAGE MECHANICAL DATA DIM. MIN. a1 B b b1 D E e e3 F I L Z 3.3 1.27 8.5 2.54 17.78 7.1 5.1 0.130 0.050 0.51 0.77 0.5 0.25 20 0.335 0.100 0.700 0.280 0.201 1.65 mm TYP. MAX. MIN. 0.020 0.030 0.020 0.010 0.787 0.065 inch TYP. MAX. 15/16 TDA7220 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. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. (c) 1994 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore Spain - Sweden - Switzerland - Taiwan - Thaliand - United Kingdom - U.S.A. 16/16 |
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