TS4994 Datasheet, PDF (1/31 Pages) STMicroelectronics – 1W Differential Input/Output Audio Power Amplifier with Selectable Standby

TS4994
1W Differential Input/Output Audio Power Amplifier
with Selectable Standby
■ Differential inputs
■ Near zero pop & click
■ 100dB PSRR @ 217Hz with grounded inputs
■ Operating from V_CC = 2.5V to 5.5V
■ 1W RAIL to RAIL output power @ Vcc=5V,
THD=1%, F=1kHz, with 8Ω load
■ 90dB CMRR @ 217Hz
■ Ultra-low consumption in standby mode (10nA)
■ Selectable standby mode (active low or
active high
■ Ultra fast startup time: 15ms typ.
■ Available in DFN10 3x3, 0.5mm pitch &
MiniSO8
■ All lead-free packages
Description
The TS4994 is an audio power amplifier capable
of delivering 1W of continuous RMS output power
into an 8Ω load @ 5V. Thanks to its differential
inputs, it exhibits outstanding noise immunity.
An external standby mode control reduces the
supply current to less than 10nA. A STBY MODE
pin allows the standby pin to be active HIGH or
LOW (except in the MiniSO8 version). An internal
thermal shutdown protection is also provided,
making the device capable of sustaining short-
circuits.
The device is equipped with Common Mode
Feedback circuitry allowing outputs to be always
biased at Vcc/2 regardless of the input common
mode voltage.
The TS4994 has been designed for high quality
audio applications such as mobile phones and
requires few external components.
Pin Connections (top view)
TS4994IQT - DFN10
STBY 1
V_{IN -} 2
STBY MODE 3
V_{IN + 4}
BYPASS 5
10 V_O+
9 V_DD
8 N/C
7 GND
6 V_O-
TS4994IST - MiniSO8
STBY
1
V_IN-
2
V_IN+
3
BYPASS
4
8
V_O+
7
Vcc
6
GND
5
V_O-
Applications
■ Mobile phones (cellular / cordless)
■ Laptop / notebook computers
■ PDAs
■ Portable audio devices
■
■
Order Codes
Part Number
TS4994IQT
TS4994IST
Temperature Range
-40°C to +85°C
-40°C to +85°C
Package
DFN10
MiniSO8
Packaging
Tape & Reel
Tape & Reel
Marking
K994
K994
April 2005
Revision 4
1/31