The TDA1576 is a monolithic FM/IF amplifier and demodulator circuit intended for use in mono and stereo FM receivers for car radios or home audio sets. It integrates a symmetrical limiting IF amplifier, quadrature demodulator, internal muting, AFC output, field‑strength indication, detune detector and standby switching.
Key features include a supply voltage range of 7.6‑20 V, low supply current, input sensitivity of –3 dB before limiting, AF output voltages up to 135 mV RMS, and total harmonic distortion as low as 0.02 % for two‑tuned‑circuit operation. The device is specified for an operating ambient temperature from –30 °C to +80 °C and a maximum power dissipation of 800 mW.
| Supply voltage (Vp) | 7.6 – 20 V |
|---|---|
| Supply current (Ip) | 16 – 18 mA |
| Input sensitivity (RMS) | –3 dB before limiting |
| AF output voltage (RMS) | 67 – 135 mV |
| Total harmonic distortion (single tuned) | 0.1 % |
| Operating ambient temperature | -30 °C to +80 °C |
| Maximum power dissipation | 800 mW |
The device operates with a supply voltage between 7.6 V and 20 V.
The TDA1576 is rated for an ambient temperature up to +80 °C.
The datasheet specifies a THD of 0.02 % for two‑tuned‑circuit operation.
The input sensitivity is –3 dB before limiting (RMS value).