The TBA570Q is for use in small low-cost a.m. portable receivers as well as in high-quality battery or main-fed a.m. and a.m./f.m. receivers. The IC incorporates an a.m. mixer, oscillator, i.f.amplifier, a.g.c. amplifier, a.m. detector, and capacitor, f.m./i.f. limiting amplifier and stable base bias for the f.m. front-end and an audio preamplifier and driver. The unique integrated audio part has an internally limited bandwidth (18KHZ) and negligible h.f. radiation back to the ferrite rod. This makes the TBA570Q ideally suitable for small-size a.m. receivers because print layout is not critical. The driver stage can directly drive complimentary output stages (Po = 6W max.), or operate as a post-amplifier (Vo=500mV).
