STMicroelectronics 1.2 W fully differential audio power amplifier DEMOTS4995J DEMOTS4995J Fiche De Données
Codes de produits
DEMOTS4995J
March 2008
Rev 3
1/26
26
TS4995
1.2 W fully differential audio power amplifier
with selectable standby and 6 dB fixed gain
Features
■
Differential inputs
■
90 dB PSRR @ 217 Hz with grounded inputs
■
Operates from V
CC
= 2.5 V to 5.5 V
■
1.2 W rail-to-rail output power @ V
CC
=5 V,
THD+N=1%, F=1 kHz, with an 8
Ω
load
■
6 dB integrated fixed gain
■
Ultra-low consumption in standby mode
(10 nA)
(10 nA)
■
Selectable standby mode (active low or active
high)
high)
■
Ultra-fast startup time: 10 ms typ. at V
CC
=3.3 V
■
Available in 9-bump flip chip (300 mm bump
diameter)
diameter)
■
Ultra-low pop and click
Applications
■
Mobile phones (cellular / cordless)
■
PDAs
■
Laptop / notebook computers
■
Portable audio devices
Description
The TS4995 is an audio power amplifier capable
of delivering 1.2 W of continuous RMS output
power into an 8
of delivering 1.2 W of continuous RMS output
power into an 8
Ω
load at 5 V. Thanks to its
differential inputs, it exhibits outstanding noise
immunity.
immunity.
An external standby mode control reduces the
supply current to less than 10 nA. A STBY MODE
pin allows the standby pin to be active high or
low. An internal thermal shutdown protection is
also provided, making the device capable of
sustaining short-circuits.
supply current to less than 10 nA. A STBY MODE
pin allows the standby pin to be active high or
low. An internal thermal shutdown protection is
also provided, making the device capable of
sustaining short-circuits.
The TS4995 features an internal fixed gain at 6dB
which reduces the number of external
components on the application board.
which reduces the number of external
components on the application board.
The device is equipped with common mode
feedback circuitry allowing outputs to be always
biased at V
feedback circuitry allowing outputs to be always
biased at V
CC
/2 regardless of the input common
mode voltage.
The TS4995 is specifically designed for high
quality audio applications such as mobile phones
and requires few external components.
quality audio applications such as mobile phones
and requires few external components.
TS4995 - Flip chip 9
Pin connections (top view)
V
IN+
V
O-
V
CC
V
IN-
V
O+
Gnd
1
2
3
7
6
5
4
8
Bypass
Stdby
Stdby Mode
9
V
IN+
V
O-
V
CC
V
IN-
V
O+
Gnd
1
2
3
7
6
5
4
8
Bypass
Stdby
Stdby Mode
9