HWD2108 Datasheet, PDF(5/18 Page) List of Unclassifed Manufacturers

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HWD2108 Datasheet, PDF (5/18 Pages) List of Unclassifed Manufacturers – Dual 105 mW Headphone Amplifier

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External Components Description (Figure 1)

Components

1. Ri

2. Ci

3. Rf

4. CS

5. CB

6. CO

7. RB

Functional Description

The inverting input resistance, along with Rf, set the closed-loop gain. Ri, along with Ci, form a high

pass filter with fc = 1/(2ÏRiCi).

The input coupling capacitor blocks DC voltage at the amplifierâs input terminals. Ci, along with Ri,

create a highpass filter with fC = 1/(2ÏRiCi). Refer to the section, Selecting Proper External

Components, for an explanation of determining the value of Ci.

The feedback resistance, along with Ri, set closed-loop gain.

This is the supply bypass capacitor. It provides power supply filtering. Refer to the Application

Information section for proper placement and selection of the supply bypass capacitor.

This is the half-supply bypass pin capacitor. It provides half-supply filtering. Refer to the section,

Selecting Proper External Components, for information concerning proper placement and selection

of CB.

This is the output coupling capacitor. It blocks the DC voltage at the amplifierâs output and forms a high

pass filter with RL at fO = 1/(2ÏRLCO)

This is the resistor which forms a voltage divider that provides 1/2 VDD to the non-inverting input of the

amplifier.

Typical Performance

Characteristics

THD+N vs Frequency

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