DESCRIPTION

The CXA1691M is a one-chip FM/AM radio IC designed for radio-cassette tape recorders and headphone tape recorders.

FEATURE

Small number of peripheral components

Low current consumption (Vcc=3V)

  FM: I D=5.3mA (Typ.)

  AM: I D=3.4mA(Typ.)

Built-in FM/AM select switch

Large output of AF amplifier

FUNCTIONS

FM section

RF amplifier; Mixer and OSC (in corporating AFC variable capacitor);

IF amplifier,

Quadrature detection;

Tuning LED driver.

AM section

RF amplifier, Mixer and OSC (with RF AGC);

IF amplifier (with IF AGC)

Detector

Tuning LED driver

AF section

Electronic volume control

FM muting