ROHM BA7042 Datasheet

Optical disc ICs

VCO with sensitivity adjustment
function

BA7042

The BA7042 is a monolithic IC comprising a VCO (voltage controlled oscillator) with sensitivity adjusting capabilities.
The oscillation frequency can be set with an external constant, and is controlled according to the control voltage. The
BA7042 can be used to produce high-modulation-factor FM signals by superimposing its control voltage with AC signals,
and to configure a PLL circuit just by attaching a frequency divider and a phase comparator.

Applications
FM intercom
FM wireless microphone
FSK modem

Features

1) The number of external components is minimized.

2) Internal control amplifier for the VCO.

3) Oscillation frequency can be set with an external
constant.

4) Maximum oscillation frequency of 18MHz.

5) DIP 8-pin package.

Block diagram

108

Optical disc ICs BA7042

FAbsolute maximum ratings (Ta = 25_C)

FRecommended operating conditions

FElectrical characteristics (unless otherwise noted, Ta = 25_C, V

CC=5.0V)

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