AN2722

Description of the demonstration board

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Description of the demonstration board

The TS4601B demonstration board is designed to help you evaluate the TS4601B audio

differential input stereo headphone amplifier. The TS4601B device, in a flip chip package, is

to control from a personal computer by using its serial port.

The provided software controls all of the TS4601B’s features (gain, mode, mute, standby

and register status).

You can use the connectors on the demonstration board to directly control some of the

features.

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The master standby of the TS4601B can be set directly by Cn8 or, if the jumper is

removed, by an external digital control (see Table 1).

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The -3 dB cut-off input high-pass filter is set at about 6 Hz (C4 to C7). If you want to

change this frequency, you have to replace C4 to C7 at the same time. More

information about these component calculations is available in the TS4601B datasheet.

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The actual current consumption of the TS4601B can be measured directly by removing

the jumper on Cn3 and inserting a DC amperemeter in series. The overall current

consumption of the demonstration board is higher than the consumption of the

in addition to the TS4601B.

Table 1.

Demonstration board connectors

Connector

Description

Cn1

Cn2, Cn9

Fully-differential positive and negative input signal connectors (active input signal

and GND). By shorting one active input to GND, you can use the demonstration

board in single-ended input mode (refer to the TS4601B datasheet for more

information).

Cn3

Connector that allows direct measurement of TS4601B’s current consumption.

Remove the jumper and insert a DC amperemeter.

Cn4

Left output connector (GND and active signal).

Cn5

Right output connector (GND and active signal).

Cn6, Cn7

SCL and SDA connectors:

Cn8

Standby control connector:

– when pins 1 and 2 are shorted, the TS4601B is in operation mode.

– when pins 2 and 3 are shorted, the TS4601B is in master standby mode.

The connector pins are connected as follows:

– pin 2 to SDZ of the TS4601B

– pin 3 to GND