TDA1597
Key Features
- Balanced limiting amplifier
- Balanced coincidence demodulator
- Two open-collector stop pulse outputs for microcomputer tuning control
- Simulated behaviour of ratio detector (internal field strength and detuning dependent voltage for dynamic AF signal muting)
- Mono/stereo blend field strength indication control voltage
- AFC output
- 3-state mode switch for FM-MUTE-ON, FM-MUTE-OFF and FM-OFF
- Internal compensation of AF signal Total Harmonic Distortion (THD)
- Built-in hum and ripple rejection circuits. QUICK REFERENCE DATA SYMBOL VP IP ViIF(rms) VoAF(rms) S/N THD PARAMETER supply voltage supply current (l2 = I7 = 0) IF input sensitivity for limiting on pin 20 (RMS value) AF output signal on pin 4 (RMS value) signal-to-noise ratio total harmonic distortion fm = 400 Hz; ∆f = ±75 kHz fm = 1 kHz; ∆f = ±75 kHz K2 adjustment and FM-MUTE-OFF Tamb operating ambient temperature CONDITIONS - 14 180 - - - -40 MIN. 7.5 TYP. 8.5 20 22 200 82 0.1 0.07 - GENERAL DESCRIPTION TDA1597 The TDA1597 provides IF amplification, symmetrical quadrature demodulation and level detection for quality home and car FM radio receivers and is suitable for mono and stereo reception. It may also be applied to common front-ends, stereo decoders and AM receivers circuits. All pin numbers mentioned in this data sheet refer to the SO version (TDA1597T) unless otherwise specified. MAX. 12 26 35 220 - 0.3 0.25 +85 UNIT V mA µV mV dB % % °C
