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TS4974IQT Folha de dados(PDF) 1 Page - STMicroelectronics

Nome de Peças TS4974IQT
Descrição Electrónicos  1W Differential Audio Power Amplifier with Up/Down Digital Volume Control Pins
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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November 2004
Revision 1
1/8
s
Operating from V
CC = 2.5V to 5.5V
s
Zero pop&clickless circuit
s
1.W output power @ Vcc=5V, THD=1%,
F=1kHz, with 8
Load
s
Ultra low consumption in standby mode
(2µA max.)
s
85dB PSRR @ 217Hz
s
16 digital volume control steps
s
Two up and down volume control discrete
pins
s Gain range from -33dB to + 12dB
s
Integrated debouncing system
s
Ultra fast start up time: 15ms typ.
s
DFN10 3X3 mm pitch 0.5
Description
At 3.3v, the TS4974 is a dual power audio
amplifier
capable
of
delivering
380mW
of
continuous RMS ouput power into a 8
bridged-
tied loads with 1% THD+N. An external standby
mode control reduces the supply current to less
than 2µA. An internal over-temperature shutdown
protection is provided.
The TS4974 has been designed for high quality
audio applications such as mobile phones and for
minimizing the number of external components.
The TS4974 features a 16 step digital volume
control through two discrete control Up and Down
pins. The start-up gain is internally fixed to -12dB.
An integrated debounce system prevents voltage
pikes on UP/DOWN pins during volume control
mode to be taken into account during a debounce
time of 10ms (typ.).
Pin Connections (top view)
Applications
s Mobile phones (cellular / cordless)
s PDAs
s Laptop/notebook computers
s Portable audio devices
Order Codes
TS4974IQ - Pinout
TS4974IQ DFN Package
1
2
3
4
10
BYPASS
VIN-
UP / DVC
VCC
STANDBY
5
9
8
7
6
DOWN / DVC
GND
VIN+
VOUT-
VOUT+
1
2
3
4
10
BYPASS
VIN-
UP / DVC
VCC
STANDBY
STANDBY
5
9
8
7
6
DOWN / DVC
GND
VIN+
VOUT-
VOUT+
Part Number
Temperature Range
Package
Packaging
Marking
TS4974IQT
-40, +85°C
QFN
Tape & Reel
TBA
PRODUCT PREVIEW
TS4974
This is preliminary information on a new product now in development. Details are subject to change without notice.
1W Differential Audio Power Amplifier
with Up/Down Digital Volume Control Pins


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