1/1
■ DIFFERENTIAL INPUTS
■ ZERO POP & CLICK
■ 100dB PSRR @ 217Hz with grounded inputs
■ OPERATING FROM V
CC
= 2.5V to 5.5V
■ 1.2W RAIL TO RAIL OUTPUT POWER @
Vcc=5V, THD=1%, F=1kHz, with 8
Ω Load
■ 70dB 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 Flip-Chip 300um/9 bumps,
DFN10 3x3, 0.5mm pitch & MiniSO8.
DESCRIPTION
The TS4994 is an Audio Power Amplifier capable
of delivering 1.2W of continuous RMS. ouput pow-
er into 8
Ω load @ 5V. Thanks to its differential in-
puts, it exhibits outstanding noise immunity.
An external standby mode control reduces the
supply current to less than 10nA. STBY MODE pin
allows the standby pin to be active HIGH or LOW
(except on MiniSO8 version).
An internal thermal shutdown protection is also
provided and device can sustain short circuits.
The device is equiped with a 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 re-
quires few external components.
APPLICATIONS
■ Mobile Phones (Cellular / Cordless)
■ Laptop / Notebook Computers
■ PDAs
■ Portable Audio Devices
ORDER CODE
All devices available only in Tape & Reel
PIN CONNECTIONS (Top View)
Part
Number
Temperature
Range: I
Package
Marking
JQS
TS4994IJT
-40, +85°C
• A94
TS4994IQT
• K994
TS4994IST
• K994
TYPICAL APPLICATION SCHEMATIC
TS4994IQT - DFN10
TS4994IJT - Flip Chip 9 bumps
1
2
3
4
5
10
9
8
7
6
V
IN -
V
O+
STBY
V
DD
V
IN +
STBY MODE
BYPASS V
O-
GND
N/C
1
2
3
4
5
1
2
3
4
5
10
9
8
7
6
10
9
8
7
6
V
IN -
V
O+
STBY
V
DD
V
IN +
STBY MODE
BYPASS V
O-
GND
N/C
TS4994IQT - MiniSO8
4
3
2
1
V
IN+
V
IN-
V
O+
GND
Vcc
V
O-
YPASS
5
6
7
8
STBY
4
3
2
1
V
IN+
V
IN-
V
O+
GND
Vcc
V
O-
YPASS
5
6
7
8
STBY
V
IN+
V
O-
V
CC
V
IN-
V
O+
GND
1
2
3
765
4
8
Bypass STBY
Stby Mode
9
V
IN+
V
O-
V
CC
V
IN-
V
O+
GND
1
2
3
765
4
8
Bypass STBY
Stby Mode
9
V
DD
+
-
+
-
V
O+
V
O-
Bias
Stby
Stby Mode
Bypass
V
IN-
V
IN+
GND
V
DD
C
B
C
S
R
IN
R
FEED
R
FEED
Diff. Input -
Diff. Input +
Common
Mode
C
IN
*
* = optional
R
IN
C
IN
*R
IN
C
IN
*
TS4994
1.2W DIFFERENTIAL INPUT AUDIO POWER AMPLIFIER
WITH SELECTABLE STANDBY
This is preliminary information on a product forseen to be developped. Details are subject to change without notice
March 2004
DATA BRIEF
