EB-TA2022 Ver la hoja de datos (PDF) - Tripath Technology Inc.

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EB-TA2022

CLASS-T DIGITAL AUDIO AMPLIFIER 2 CHANNEL TA2022 EVALUATION BOARD

Tripath Technology Inc. 

TABLE 1

J2 Connector Pin# Connection

Pin1

Agnd

Pin2

5V

Pin3

IN1

Pin4

Agnd

Pin5

IN2

Tripath Technology, Inc. - Technical Information

TABLE 2

J3 Connector Pin# Connection

Pin1

Vo1

Pin2

GND1

Pin3

GND2

Pin4

Vo2

Pin5

VNN

Pin6

Pgnd

Pin7

VPP

OUTPUT

The output connection for each channel of the EB-TA2022 is made at pins 1 – 4 of header J3. The

output of the TA2022 is single-ended, therefore each output has a positive output (Vo1 and Vo2) and

a ground (GND1 and GND2).

INPUT

The input connection for each channel of the EB-TA2022 is made at pins 3 – 5 of header J2. The left

and right inputs should be connected to IN1 (pin3) and IN2 (pin5). These inputs share a common

ground referenced to Agnd (pin4).

JUMPER SETTINGS

There is a 3-pin header for the MUTE control of the TA2022. With the jumper placed in the AWAKE

position the part is un-muted by grounding (AGND) the mute pin. When the jumper is placed in the

MUTE position the mute pin is pulled high (5V) and the amplifier is muted.

OUTPUT OFFSET NULL AND RELAY

There is an automatic offset trim circuit for each channel using an LM358 op-amp. Once the LM358

trims any DC to 0Vdc a comparator allows a relay to close.

GAIN SETTING

The gain of the EB_TA2022 Version 4.0 is set to 18V/V. The gain of the TA2022 is the product of the

input stage and the modulator stage. The input stage gain is set to unity. Before changing the gain of

the TA2022, please refer to the TA2022 Amplifier Gain section of the TA2022 Data Sheet.

3

EB-TA2022 – Rev. 1.0/03.02

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