306

Optical disc ICs

BA6197FP

FOperation notes

(1) Muting and resetting

(2)

The circuit is muted during thermal shutdown and

during the mute-on state. In each case, only the drivers

are muted. During muting, the output pins remain at the

(3)

When using an attached resistor to change the

gain, the temperature characteristics of the internal feed-

back resistors results in temperature variation in the gain

(relative to the typical value) of

)4600ppm per degree.

There is virtually no temperature variation in error due to

resistance variation.

(4)

Be sure to connect the IC to a 0.1

µF bypass capaci-

tor to the power supply, at the base of the IC.

(5)

The radiating fin is connected to the packages inter-

nal GND, but should also be connected to an external

ground.

(6)

The capacitor between regulator output (pin 6) and

GND also serves to prevent oscillation of the IC, so select

one with good temperature characteristics.

(7)

Pins 5 and 6 may be left open when the regulator

is not used.

(8)

Pins 14, 15 and 16 may be left open when the op-

erational amplifier is not used.

FElectrical characteristic curves