AN2722 Datasheet, PDF (1/16 Pages) STMicroelectronics – Demonstration board user guidelines for the

AN2722
Application note
Demonstration board user guidelines for the
TS4601B high-performance stereo headphone driver
Introduction
This application note concerns the TS4601B’s demonstration board, designed to evaluate
the TS4601B, a high-performance stereo headphone driver with capacitor-less outputs and
I²C interface from STMicroelectronics.
This document provides:
■ a brief description of the TS4601B device.
■ a description of the demonstration board and all of its components.
■ a description of the TS4601B control software provided.
■ the layout of the demonstration board.
Figure 1. TS4601B demonstration board
About the TS4601B
The TS4601B is a stereo headphone driver dedicated to high audio performance and
space-constrained applications. It is based on a low-power dissipation amplifier core
technology. Special care was taken in the design of the amplification chain to achieve
peerless PSRR (107 dB typ. at 217 Hz) and 101 dB of SNR.
The TS4601B can drive at minimum 0.9 V_rms output voltage into 16 Ω and 1.6 V_rms into
10 kΩ, regardless of the power supply voltage, in the range of 2.9 to 5.5 V.
An I²C interface is used to control the volume through 64 steps ranging from -60 dB to +4 dB
and to configure the device in multiple modes. The traditionally-used output-coupling
capacitors can be removed and a dedicated common-mode sense pin suppresses parasitic
noise from the jack.
The TS4601B is designed to be used with an output serial resistor. It ensures unconditional
stability over a wide range of capacitive loads. It is packaged in a tiny 16-bump flip chip
package with a pitch of 500 µm and a 300-µm diameter ball size.
March 2009
Rev 2
1/16
www.st.com