Description of the evaluation board

AN2862

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Description of the evaluation board

The TS2007FC demonstration board is designed for the TS2007FC class D audio

differential amplifier. The TS2007FC device, in a flip-chip package, is mounted on a two-

layer PCB. Easily-accessible connectors on the board allow changing or driving the gain

select and standby control pins, as well as changing the input configuration of the

TS2007FC.

The TS2007FC’s gain can be set to either 6 or 12 dB via the P1 connector (see Table 1).

The input configuration is either capacitor-coupled or common-mode feedback. On the

evaluation board, the JP3 and JP4 connectors allow you to change the input configuration.

In the capacitor-coupled configuration, the -3 dB cut-off frequency in Hz is:

More information about component calculations is available in the TS2007FC datasheet.

Caution:

When you apply the power supply through JP5, do not invert the polarity since this will

irreversibly damage the U1 amplifier.

Table 1.

Evaluation board connectors

Connector(s)

Description

JP1

Input signal connector (GND, In+, In-, GND).

JP1

Output signal connector (GND, Out-, Out+, GND).

JP3, JP4

Input configuration:

– capacitor-coupled when JP3 and JP4 are open.

– common-mode feedback when JP3 and JP4 are shorted by jumpers.

P1

Gain select control connector:

–

pins 1 and 2 are shorted or pin 2 is floating, the gain is 6 dB.

–

pins 2 and 3 are shorted, the gain is 12 dB.

The connector pins are connected as follows:

– 2 to GS of the TS2007FC

– 3 to GND

P2

Standby control connector:

–

pins 1 and 2 are shorted, the TS2007FC is in operation mode.

–

pins 2 and 3 are shorted, the TS2007FC is in standby mode.

The connector pins are connected as follows:

– 2 to STANDBY of the TS2007FC

– 3 to GND

JP5

1

2

π Z

in

C

1

⋅⋅

------------------------------------

1

2

π Z

in

C

2

⋅⋅

------------------------------------

=

`

12

3

`

12

3

`

12

3

`

12

3