TS4994_06 Datasheet, PDF (1/35 Pages) Texas Instruments – 1W differential input/output audio power amplifier with selectable standby

TS4994
1W differential input/output audio power amplifier
with selectable standby
Features
■ Differential inputs
■ Near-zero pop & click
■ 100dB PSRR @ 217Hz with grounded inputs
■ Operating range from V_CC = 2.5V to 5.5V
■ 1W rail-to-rail output power @ V_CC = 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) &
MiniSO-8
■ 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. Due to its differential inputs,
it exhibits outstanding noise immunity.
An external standby mode control reduces the
supply current to less than 10nA. An STBY
MODE pin allows the standby to be active HIGH
or LOW (except in the MiniSO-8 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
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 - MiniSO-8
STBY
1
V_IN-
2
V_IN+
3
BYPASS
4
8
V_O+
7
Vcc
6
GND
5
V_O-
biased at V_CC/2 regardless of the input common
mode voltage.
The TS4994 is designed for high quality audio
applications such as mobile phones and requires
few external components.
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
Package
DFN10
MiniSO-8
Packing
Tape & reel
Marking
K994
K994
December 2006
Rev 6
1/35
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