TS4601 Datasheet, PDF (1/28 Pages) STMicroelectronics – High performance stereo headphone amplifier with capacitorless outputs and I2C bus interface

TS4601
High performance stereo headphone amplifier
with capacitorless outputs and I²C bus interface
Features
■ Power supply range: 2.9 V to 5.5 V
■ 107 dB of PSRR at 217 Hz
■ Fully differential inputs
■ I²C interface for volume control
■ Digital volume control range from -60 dB to
+4 dB
■ 101 dB of SNR A-weighted
■ Independent right and left channel shutdown
control
■ Low quiescent current: 4.8 mA typ. at 3.0 V
■ Low standby current: 2 µA max
■ Output-coupling capacitors removed
■ Flip-chip package 2.1 mm x 2.1 mm, 500 µm
pitch, 16 bumps
Applications
■ Cellular phones
■ Notebook computers
■ CD/MP3 players
Description
The TS4601 is a stereo headphone driver
dedicated to high audio performance and space-
constrained applications.
It is based on 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 TS4601 can drive 0.9 V_rms output voltage
into 16 Ω and 1.6 V_rms into 10 kΩ, whatever the
power supply voltage, in the 2.9 V to 5.5 V range.
TS4601EIJT - Flip-chip
Pinout (top view)
SDZ
SDA
SCL
VOUTR D
INR-
INR+
CMS
VCC C
INL-
INL+
PVSS
VOUTL B
PVCC
GND
C1
4
3
2
C2
A
1
Balls are underneath
An I²C interface offers volume control in 64 steps
from -60 dB to +4 dB and multiple configuration
modes for the device.
The traditionally used output-coupling capacitors
can be removed and a dedicated common-mode
sense pin removes parasitic noise from the jack.
The TS4601 is designed to be used with an
output serial resistor. It ensures unconditional
stability over a wide range of capacitive loads.
The TS4601 is packaged in a tiny 16-bump flip-
chip with a pitch of 500 µm and a 300 µm
diameter ball size.
February 2008
Rev 2
1/28
www.st.com
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