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SSM2304

Preliminary Technical Data

EVALUATION BOARD INFORMATION

INTRODUCTION

The SSM2304 audio power amplifier is a complete low power,

Class-D, stereo audio amplifier capable of delivering 2.8 W/channel

into 4 Ω load. In addition to the minimal parts required for the

application circuit, measurement filters are provided on the

evaluation board so that conventional audio measurements can

be made without additional components.

This section provides an overview of Analog Devices SSM2304

evaluation board. It includes a brief description of the board as

well as a list of the board specifications.

Table 5. SSM2304 Evaluation Board Specifications

Parameter

Specification

Supply Voltage Range, VDD

2.5 V to 5.0 V

Power Supply Current Rating

1.5 A

Continuous Output Power, PO

(RL = 4 Ω, f = 1 kHz, 22 kHz BW)

2 W

Minimum Load Impedance

4 Ω

OPERATION

Use the following steps when operating the SSM2304

evaluation board.

Power and Ground

Set the power supply voltage between 2.5 V and 5.0 V. When

connecting the power supply to the SSM2304 evaluation

board, make sure to attach the ground connection to the

GND header pin first and then connect the positive supply

to the VDD header pin.

Inputs and Outputs

Ensure that the audio source is set to the minimum level.

Connect the audio source to Inputs INL± and INR±.

Connect the speakers to Outputs OUTL± and OUTR±.

External Gain Settings

It is possible to adjust the SSM2304 gain lower than 18 dB using

external resistors at the input, refer to Error! Reference source

not found.

6 and Error! Reference source not found.7 on the

product data sheet for proper circuit configuration. For external

gain configuration, use the following formula:

External Gain Settings = 300k/(37.5k+Rext)

Shutdown Control

The shutdown select header controls the shutdown function of

the SSM2304. The shutdown pin on the SSM2304 is active low,

meaning that a low voltage (GND) on this pin places the SSM2304

into shutdown mode.

Select jumper to 1-2 position. Shutdown pulled to VDD.

Select jumper to 2-3 position. Shutdown pulled to GND.

Input Configurations

For differential input configuration with input capacitors

do not place a jumper on JP8, JP9, JP10, and JP11.

For differential input configuration without input capacitors

place a jumper on JP8, JP9, JP10, and JP11.

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