AN2725

Description of the demonstration board

Doc ID 14535 Rev 1

3/8

Caution:

When you apply the power supply through P1, do not invert the polarity as this will

irreversibly damage the U1 amplifier.

Table 2.

Demonstration board connectors

Connector(s)

Description

P1

P2, P3

Gain setting connectors - P2 for the G1 pin, P3 for the G0 pin of the TS2012.

The connector pins are connected as follows:

– 2 of P2 to the G1 pin

– 2 of P3 to the G0 pin

– 3 to GND

Jumper positions:

– logical "1": pins 1 and 2 are shorted

– logical "0": pins 2 and 3 are shorted

P4, P5

Standby control connector - P4 for the right channel, P5 for the left channel.

The connector pins are connected as follows:

– 2 of P4 to the STBYR pin of the TS2012

– 2 of P5 to the STBYL pin of the TS2012

– 3 to GND

Jumper positions:

–

when pins 1 and 2 are shorted, the channel is operating.

–

when pins 2 and 3 are shorted or pin 2 is floating, the channel is in

standby mode.

P11

GND)

P12

GND)

P21

GND)

P22

GND)

P13, P14, P23, P24

Input configuration:

– capacitor coupled when P13 and P14 (P23 and P24) are disconnected.

– common-mode feedback when P13 and P14 (P23 and P24) are shorted by

jumpers.

P15

Left channel output signal connector (positive and negative output)

P25

Right channel output signal connector (positive and negative output)

`

12

3

`

12

3

`

12

3

`

12

3