TI TLV320DAC3202 High Efficiency Class G Audio Amplification Solution

TI’s TLV320DAC3202 is a high-fidelity, high-efficiency and low-power class G headphone amplifier that integrates DAC and power supply. The static power consumption of 6.5mW channel SNR is 100dB (A), built-in short circuit protection, supports 8-, 11.025-, 12- , 16-, 24-, 32-, 44.1 and 48-kHz sampling frequencies, digitally controlled I2C interface, supports 16-, 20-, 24- and 32-bit data widths, 32-step volume control, from 4dB to -59dB, mainly used in intelligent Cell phones and music phones, handheld navigators, PMPs and PDAs, handheld game consoles, HDDs and flash-based handheld audio players. This article introduces the TLV320DAC3202 main features, functional block diagram, typical application circuit and TLV320DAC3202EVM evaluation board main features, circuit diagram and bill of materials.

The TLV320DAC3202 is a high fidelity and low power headphone amplifier with integrated DAC and power rails. The small solution size and highly efficient operation maximizes battery life and performance. The digital audio interface supports industry standard formats such as I2S and PCM. Many features of this device such as volume setting, data width and sampling rate are configurable for optimum flexibility and efficiency. The headset power control automatically adjusts the rail voltage based on the input signal to maximize efficiency and performance. The control interface uses an industry standard I2C controller for ease of operation and reduction in device pin count.

Main features of TLV320DAC3202:

Ground Referenced Click-Pop Free Class-G Stereo Headset Driver

Capable of Driving 1 VRMS at the Headset Driver Output, Per Channel, in Phase

100-dB(A) Channel SNR With 6.5-mW of Quiescent Power Dissipation

Built In Short-Circuit Protection for Preventing Supply Rails Overload

Supports 8-, 11.025-, 12-, 16-, 24-, 32-, 44.1- and 48-kHz Sample Rates

I2C Interface for Digital Control

Supports 16-, 20-, 24- and 32-Bit Data Width

Supports Standard I2S, PCM, Left and Right Justified Formats

Supports Data Mixing With Gain Options

32-Step Volume Control from 4 to –59 dB

Clocking: Internal Clock Derived from I2S BCLK

Package: WCSP, 0.5 mm pitch, 2 mm × 2.5 mm

Power Supply: Direct Battery and IO Supply

TLV320DAC3202 application:

Smart Phones and Music Phones

Portable Navigation

Personal Media Players

PDAs

Portable Game Consoles

HDD and Flash-Based Portable Audio Players

figure 1. TLV320DAC3202 functional block diagram

figure 2. Typical application circuit of TLV320DAC3202

TLV320DAC3202EVM Evaluation Board

The TLV320DAC3202EVM provides a simplified platform to evaluate the performance and functionality of the TLV320DAC3202 low-power headset IC. A complete circuit description, schematic diagram, and bill of materials are included.

Key features of the TLV320DAC3202EVM evaluation board:

• A USB stick version of the TLV320DAC3202EVM for easy operation

• USB connection to PC provides the ability to stream audio data for evaluation

• Power to TLV320DAC3202 can be supplied from a PC USB connection, or an external battery by changing the jumper connection

• A 3.5-mm jack can be connected to a headphone for listening tests or to a cable connected to an instrument for performance verifications

• Pre-programmed EEPROM boots TLV320DAC3202 as a USB audio device when connected to a PC

• Use generated wave files (.wav) to evaluate total harmonic distortion (THD), crosstalk between channels, ICN, dynamic range, or amplitude

image 3. TLV320DAC3202EVM Evaluation Board Outline Drawing: Top Layer

Figure 4. TLV320DAC3202EVM Evaluation Board Outline Drawing: Bottom Layer

Figure 5. TLV320DAC3202EVM Evaluation Board Circuit Diagram
TLV320DAC3202EVM Evaluation Board Bill of Materials (BOM):

For details, see:
http://focus.ti.com/lit/ds/symlink/tlv320dac3202.pdf
and
http://focus.ti.com/lit/ug/slau327/slau327.pdf

The Links:   V300A15T500AL STK621-210B