DocID24159 Rev 2

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MP33AB01

Application recommendations

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Application recommendations

Figure 3. MP33AB01 electrical connections and external component values

The DC-blocking capacitor C1 is required on the Vout pin as shown in Figure 3. The C1

value and the input resistance of the interface circuit (R) affect the cut-off frequency of the

Audio signal path as:

3 dB cut-off freq = 1 / 2

 RC1

It's advisable to have a cut-off frequency well below 20 HZ, so for a typical input resistance

of about 20 k

it is recommended to use a C1 > 1 µF.

MP33AB01

Pin.4

Pin.1

Pin.2,3,5,6

+

Vdd

C1

C2

C3

(Ground)

R2

Typical values:

C1 > 1 µF

C2 ~ 1000 pF

C3 = 1 µF

-

R1

Vref

Ext. gain = (R1+R2) / R1

Vref

R