599

Audio ICs

BA3834S / BA3834F

(6)

Output offset voltage

The relationship between the output offset voltage and

the output selection cycle (cycle time) for this IC is shown

in Fig.5. The maximum output offset voltage of 150mV

that is given in the electrical characteristics table is under

the condition that Ts = 200msec. When Ts is greater than

50msec, the graph of the output offset voltage is a

straight line at 150mV. When Ts is below 50msec, due to

transient characteristics of the peak hold circuit, the

graph is a line sloping downwards to the right. In other

words, the shorter the cycle, the larger the output offset

voltage.

Furthermore, the output offset voltage may shift due to

soldering or other temperature stresses from the sur-

roundings. Therefore, when setting the spectral analyzer

light level, take into consideration the points given above

and make sure that it does not light by mistake during

quiescent periods. Use the chart below as a guide for

this, and, if necessary, leave even a larger margin.

FElectrical characteristics curves