TS482_05 Datasheet, PDF (1/26 Pages) STMicroelectronics – 100mW Stereo Headphone Amplifier

TS482
100mW Stereo Headphone Amplifier
■ Operating from Vcc=2V to 5.5V
■ 100mW into 16Ω at 5V
■ 38mW into 16Ω at 3.3V
■ 11.5mW into 16Ω at 2V
■ Switch ON/OFF click reduction circuitry
■ High power supply rejection ratio: 85dB at 5V
■ High signal-to-noise ratio: 110dB(A) at 5V
■ High crosstalk immunity: 100dB (F=1kHz)
■ Rail-to-rail input and output
■ Unity-gain stable
■ Available in SO-8, MiniSO-8 & DFN8
Description
The TS482 is a dual audio power amplifier able to
drive a 16 or 32Ω stereo headset down to low
voltages.
It is delivering up to 100mW per channel (into 16Ω
loads) of continuous average power with 0.1%
THD+N from a 5V power supply.
TS482ID, TS482IDT - SO-8
OUT (1)
1
VIN- (1)
2
VIN+ (1)
3
GND
4
8
VCC
7
OUT (2)
6
VIN- (2)
5
VIN+ (2)
TS482IST - MiniSO-8
OUT (1)
1
VIN- (1)
2
VIN+ (1)
3
GND
4
8
VCC
7
OUT (2)
6
VIN- (2)
5
VIN+ (2)
TS482IQT - DFN8
OUT (1) 1
VIN - (1) 2
VIN + (1) 3
GND 4
8 Vcc
7 OUT (2)
6 VIN - (2)
5 VIN + (2)
Typical application schematic
The unity gain stable TS482 can be configured by
external gain-setting resistors.
Applications
■ Stereo headphone amplifier
■ Optical storage
■ Computer motherboard
■ PDA, organizers & notebook computers
■ High-end TV, set-top box, DVD players
■ Sound cards
Rfeed1
1µF Vcc _3.9k
+
RpolVcc
Right In _Cin1
Cs
3.9k
+
100k ₈
2-
1
2.2µF
Rin1
3
Cb
+
2.2µF _Rin21µF
5
6
+
TS482
+7
-
+
Left In Cin2 ^3.9k
4
100k
Rpol
3.9k
220µF _RL=32Ohms
+
Cout1
Cout2 RL=32Ohms
+
220µF
Rfeed2
Order Codes
Part Number
Temperature Range
Package
Packing
Marking
TS482ID/IDT
TS482IST
TS482IQT
-40, +85°C
SO-8
Tube or Tape & Reel
miniSO-8
482I
Tape & Reel
DFN8
November 2005
Rev 2
1/26
www.st.com
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