Part Number: TDA1220B
Function: AM-FM QUALITY RADIO
Manufacturer: ST Microelectronics
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Description
TDA1220B AM-FM QUALITY RADIO The TDA1220B is a monolithic integrated circuit in a 16-lead dual in-line package. It is intended for quality receivers produced in large quantities. The functions incorporated are: AM SECTION – Preamplifier and double balanced mixer – One pin local oscillator – IF amplifier with internal AGC – Detector and audio preamplifier FM SECTION – IF amplifier and limiter – Quadrature detector – Audio preamplifier The TDA1220B is suitable up to 30MHz AM and for FM bands (including 450KHz narrow band) and features: – Very constant characteristics (3V to 16V) – High sensitivity and low noise – Very low tweet ORDERING NUMBER : TDA 1220BK DIP-16 Plastic (0.25) – Sensitivity regulation facility (*) – High recovered audio signal suited for stereo decoders and radio recorders – Very simple DC switching of AM-FM – Low current drain – AFC facility (*) Maximum AM sensitivity can be reduced by means of a resistor (5 to 12KΩ) between pin 4 and ground. BLOCK DIAGRAM March 1993 1/18 TDA1220B ABSOLUTE MAXIMUM RATINGS Symbol Vs Ptot Top Tstg, Tj Supply voltage Total power dissipation at Tamb < 110°C Operating temperature Storage and junction temperature Parameter Value 16 400 -20 to 85 -55 to 150 Unit V mW °C °C PIN CONNECTION (Top view) THERMAL DATA Symbol Rth-j-amb Parameter Thermal resistance junction-ambient max Value 100 Unit °C/W 2/18 TDA1220B ELECTRICAL CHARACTERISTICS ( Tamb = 25 °C, Vs = 9V unless otherwise specified, refer to test circuit) Symbol Vs Id Parameter Supply voltage Drain current FM AM AM SECTION (fo = 1 MHz; fm = KHz) Vi S/N Vi Vo d AGC range Recovered audio signal (pin 9) Distortion Input sensitivity S/N = 26 dB Vi = 10 mV ∆Vout = 10 dB Vi = 1 mV m = 0.3 m = 0.3 m = 0.8 m = 0.3 m = 0.3 m = 0.8 VH Ri Ci Ro 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 = 10.8 MHz; fm = 1 KHz) Vi AMR S/N d d d Vo Ri Ci Ro Input limiting voltage Amplitude modulation rejection Ultimate quieting Distortion Distortion Distortion (double tuned) Recovered audio signal (pin 9) Input resistance between pin 16 and ground Input capacitance between pin 16 and ground Output resistance (pin 9) 4.5 ∆f = ±22.5 KHz Vi = 1 mV 80 -3 dB limiting point ∆f = ±22.5 KHz Vi = 3 mV ∆f = ±22.5 KHz ∆f = ±75 KHz ∆f = ±22.5 KHz m = 0.3 Vi = 1 mV Vi = 1 mV Vi = 1 mV 40 55 22 50 65 0.7 0.25 0.1 110 6.5 14 7 9.5 140 1.5 0.5 36 µV dB dB % % % mV KΩ pF KΩ m = 0.3 Vi = 1 mV m = 0.8 m=0 m=0 4.5 d < 10% 1 7.5 18 7 40 55 9.5 45 94 80 12 52 100 130 0.4 1.2 200 1 25 µV dB dB mV % % V KΩ pF KΩ dB dB Test conditions Min. 3 10 14 Typ. Max. 16 15 20 Unit V mA mA Vi = 1 mV 3/18 TDA1220B Figure 1. Test circuit Figure 2. PC board and component layout (1:1 scale) of the test circuit 4/18 TDA1220B Figure 3. Audio output, noise and tweet levels vs. input signal (AM section) Figure [...]
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