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TS4974IQT датащи(PDF) 1 Page - STMicroelectronics

номер детали TS4974IQT
подробное описание детали  1W differential audio power amplifier with up/down digital volume control pins
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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May 2007
Rev 4
1/25
25
TS4974
1W differential audio power amplifier
with up/down digital volume control pins
Features
Operates from VCC= 2.5 V to 5.5 V
Zero pop & click
1 W output power @ VCC =5V, THD=1%,
F = 1 kHz, with 8
Ωload
Ultra-low consumption in standby mode (2 µA
max.)
85 dB PSRR @ 217Hz
16-step digital volume control
Two discrete up and down volume control pins
Gain range from -33 dB to + 12 dB
Integrated debouncing system
Ultra-fast start-up time: 15 ms typ.
DFN10 3x3 mm (pitch 0.5)
Applications
Mobile phones (cellular / cordless)
PDAs
Laptop/notebook computers
Portable audio devices
Description
At 3.3 V, the TS4974 is a dual power audio
amplifier capable of delivering 380 mW of
continuous RMS output power into a 8
Ω bridged-
tied loads with 1% THD+N. An external standby
mode control reduces the supply current to less
than 2 µA. An internal over-temperature shutdown
protection is provided.
The TS4974 has been designed for high quality
audio applications such as mobile phones and
minimizes the number of external components
necessary.
The TS4974 features 16-step digital volume
control through two discrete Up and Down control
pins. The start-up gain is internally fixed to
-12 dB. An integrated debounce system prevents
voltage spikes on the UP/DOWN pins during
volume control mode from being taken into
account during a debounce time of 10 ms (typ).
Pin connections (top view)
DFN10 (3x3)
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+
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