TS4975 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TS4975

Stereo Headphone Drive Amplifier with Digital Volume Control via I2C Bus

STMicroelectronics 

TS4975

Stereo Headphone Drive Amplifier with

Digital Volume Control via I2C Bus

■ Operating from VCC = 2.5V to 5.5V

■ I²C bus control interface

■ 40mW output power @ VCC = 3.3V,

THD = 1%, F = 1kHz, with 16Ω load

■ Ultra-low consumption in stdby mode: 0.6µA

■ Digital volume control range from 18dB to

-34dB

■ 14-step digital volume control

■ 9 different output mode selections

■ Pop & click noise reduction circuitry

■ Flip-chip package, 12 x 300µm bumps (lead-

free)

Description

The TS4975 is a stereo audio headphone driver

capable of delivering up to 102mW per channel of

continuous average power into a 16Ω single-

ended load with 1% THD+N from a 5V power

supply. The overall gain of these headphone

drivers is controlled digitally by volume control

registers programmed via the I2C interface,

minimizing the number of external components

needed. This device can also easily be driven by

an MCU to select the output modes, through the

I2C bus interface.

A phantom ground configuration allows one to

avoid using bulky capacitors on the outputs of the

headphone amplifiers.

The TS4975 is packaged in a 1.8mm X 2.3mm

Flip Chip package, ideally suited for space-

conscious portable applications.

It has also an internal thermal shutdown

protection mechanism.

Order Codes

Part Number

TS4975EIJT

Temperature Range

-40, +85°C

TS4975EIJT - Flip Chip

Pin out (top view)

OUT1

PHG1

PHG2

OUT2

IN1

VCC

GND

IN2

BYPASS

SCL

SDA

ADD

Applications

■ Mobile phones (cellular / cordless)

■ PDAs

■ Laptop/notebook computers

■ Portable audio devices

Package

Flip-chip

Packing

Tape & Reel

Marking

A75

November 2005

Rev 3

1/36

www.st.com

36

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