1/24
s
Operating from Vcc=2V to 5.5V
s
100mW into 16
at 5V
s
38mW into 16
at 3.3V
s
11.5mW into 16
at 2V
s
Switch ON/OFF click reduction circuitry
s
High Power Supply Rejection Ratio: 85dB at
5V
s
High Signal-to-Noise ratio: 110dB(A) at 5V
s
High Crosstalk immunity: 100dB (F=1kHz)
s
Rail to Rail input and output
s
Unity-Gain Stable
s
Available in SO8, MiniSO8 & DFN8
DESCRIPTION
The TS482 is a dual audio power amplifier able to
drive a 16 or 32
stereo headset down to low volt-
ages.
It's delivering up to 100mW per channel (into 16
loads) of continuous average power with 0.1%
THD+N from a 5V power supply.
The unity gain stable TS482 can be configured by
external gain-setting resistors.
APPLICATIONS
s
Stereo Headphone Amplifier
s
Optical Storage
s
Computer Motherboard
s
PDA, organizers & Notebook computers
s
High end TV, Set Top Box, DVD Players
s
Sound Cards
ORDER CODE
MiniSO & DFN only available in Tape & Reel with T suffix,
SO is available in Tube (D) and in Tape & Reel (DT))
PIN CONNECTIONS (top view)
Part Number
Temperature
Range
Package
Marking
D
S
Q
TS482ID/DT
-40, +85C
482I
TS482IST
TS482IQT
TYPICAL APPLICATION SCHEMATIC
TS482IST - MiniSO8
TS482ID, TS482IDT - SO8
5
O
UT (1)
6
7
8
4
3
2
1
V
IN+ (1)
G
ND
V
CC
O
UT (2)
V
IN- (2)
V
IN+ (2)
V
IN- (1)
5
O
UT (1)
6
7
8
4
3
2
1
V
IN+ (1)
G
ND
V
CC
O
UT (2)
V
IN- (2)
V
IN+ (2)
V
IN- (1)
+
-
+
-
8
4
1
7
2
3
5
6
TS482
3.9k
3.9k
3.9k
3.9k
100k
100k
Vcc
Vcc
+
220F
+
220F
Right In
Left In
+
RL=32Ohms
+
RL=32Ohms
+
1F
+
2.2F
+
2.2F
+
Cs
1F
Cin1
Cin2
Rin1
Cout2
Cout1
Rin2
Rfeed1
Rfeed2
Cb
Rpol
Rpol
+
-
+
-
8
4
1
7
2
3
5
6
TS482
3.9k
3.9k
3.9k
3.9k
100k
100k
Vcc
Vcc
+
220F
+
220F
Right In
Left In
+
RL=32Ohms
+
RL=32Ohms
+
1F
+
2.2F
+
2.2F
+
Cs
1F
Cin1
Cin2
Rin1
Cout2
Cout1
Rin2
Rfeed1
Rfeed2
Cb
Rpol
Rpol
TS482IQT - DFN8
1
2
3
4
5
8
7
6
V
IN + (1)
GND
V
IN + (2)
Vcc
OUT
(2)
OUT
(1)
V
IN - (2)
V
IN - (1)
1
2
3
4
5
8
7
6
V
IN + (1)
GND
V
IN + (2)
Vcc
OUT
(2)
OUT
(1)
V
IN - (2)
V
IN - (1)
100mW STEREO HEADPHONE AMPLIFIER
June 2003
TS482
TS482
2/24
ABSOLUTE MAXIMUM RATINGS
OPERATING CONDITIONS
Symbol
Parameter
Value
Unit
V
CC
Supply voltage
1)
6
V
V
i
Input Voltage
-0.3 to V
CC
+
0.3
V
T
oper
Operating Free Air Temperature Range
-40 to + 85
C
T
stg
Storage Temperature
-65 to +150
C
T
j
Maximum Junction Temperature
150
C
R
thja
Thermal Resistance Junction to Ambient
SO8
MiniSO8
DFN8
175
215
70
C/W
Pd
Power Dissipation
2)
SO8
MiniSO8
DFN8
0.71
0.58
1.79
W
ESD
Human Body Model (pin to pin)
2
kV
ESD
Machine Model - 220pF - 240pF (pin to pin)
200
V
Latch-up Latch-up Immunity (All pins)
200
mA
Lead Temperature (soldering, 10sec)
250
C
Output Short-Circuit Duration
see note
3)
1. All voltages values are measured with respect to the ground pin.
2. Pd has been calculated with Tamb = 25C, Tjunction = 150C.
3. Attention must be paid to continuous power dissipation. Exposure of the IC to a short circuit on one or two amplifiers simultaneously can cause exces-
sive heating and the destruction of the device.
Symbol
Parameter
Value
Unit
V
CC
Supply Voltage
2 to 5.5
V
R
L
Load Resistor
>= 16
C
L
Load Capacitor
R
L
= 16 to 100
R
L
> 100
400
100
pF
V
ICM
Common Mode Input Voltage Range
G
ND
to V
CC
V
R
THJA
Thermal Resistance Junction to Ambient
SO8
MiniSO8
DFN8
1)
150
190
41
C/W
1. When mounted on a 4-layer PCB.
Components
Functional Description
Rin
Inverting input resistor which sets the closed loop gain in conjunction with Rfeed. This resistor also
forms a high pass filter with Cin (fc = 1 / (2 x Pi x Rin x Cin))
Cin
Input coupling capacitor which blocks the DC voltage at the amplifier input terminal
Rfeed
Feed back resistor which sets the closed loop gain in conjunction with Rin
Cs
Supply Bypass capacitor which provides power supply filtering
Cb
Bypass capacitor which provides half supply filtering
Cout
Output coupling capacitor which blocks the DC voltage at the load input terminal
This capacitor also forms a high pass filter with RL (fc = 1 / (2 x Pi x RL x Cout))
Rpol
These 2 resistors form a voltage divider which provide a DC biasing voltage (Vcc/2) for the 2 amplifiers.
Av
Closed loop gain = -Rfeed / Rin
TS482
3/24
ELECTRICAL CHARACTERISTICS
V
CC
= +5V, GND = 0V, T
amb
= 25C (unless otherwise specified)
Symbol
Parameter
Min.
Typ.
Max.
Unit
I
CC
Supply Current
No input signal, no load
5.5
7.2
mA
V
IO
Input Offset Voltage (V
ICM
= V
CC
/2)
1
5
mV
I
IB
Input Bias Current (V
ICM
= V
CC
/2)
200
500
nA
P
O
Output Power
THD+N = 0.1% Max, F = 1kHz, R
L
= 32
THD+N = 1% Max, F = 1kHz, R
L
= 32
THD+N = 0.1% Max, F = 1kHz, R
L
= 16
THD+N = 1% Max, F = 1kHz, R
L
= 16
60
95
65
67.5
100
107
mW
THD + N
Total Harmonic Distortion + Noise (A
v
=-1)
1)
R
L
= 32
,
P
out
= 60mW, 20Hz
F
20kHz
R
L
= 16
,
P
out
= 90mW, 20Hz
F
20kHz
1. Fig. 68 to 79 show dispersion of these parameters.
0.03
0.03
%
PSRR
Power Supply Rejection Ratio (A
v
=1), inputs floating
F = 100Hz
,
Vripple = 100mVpp
85
dB
I
O
Max Output Current
THD +N < 1%, R
L
= 16
connected between out and V
CC
/2
106
120
mA
V
O
Output Swing
V
OL
: R
L
= 32
V
OH
: R
L
= 32
V
OL
: R
L
= 16
V
OH
: R
L
= 16
4.45
4.2
0.4
4.6
0.55
4.4
0.48
0.65
V
SNR
Signal-to-Noise Ratio (Filter Type A, A
v
=-1)
(R
L
= 32
,
THD +N < 0.2%, 20Hz
F
20kHz)
95
110
dB
Crosstalk
Channel Separation, R
L
= 32
F = 1kHz
F = 20Hz to 20kHz
Channel Separation, R
L
= 16
F = 1kHz
F = 20Hz to 20kHz
100
80
100
80
dB
C
I
Input Capacitance
1
pF
GBP
Gain Bandwidth Product (R
L
= 32
)
1.35
2.2
MHz
SR
Slew Rate, Unity Gain Inverting (R
L
= 16
)
0.45
0.7
V/s
TS482
4/24
ELECTRICAL CHARACTERISTICS
V
CC
= +3.3V, GND = 0V, T
amb
= 25C (unless otherwise specified)
2)
2.
All electrical values are guaranted with correlation measurements at 2V and 5V
Symbol
Parameter
Min.
Typ.
Max.
Unit
I
CC
Supply Current
No input signal, no load
5.3
7.2
mA
V
IO
Input Offset Voltage (V
ICM
= V
CC
/2)
1
5
mV
I
IB
Input Bias Current (V
ICM
= V
CC
/2)
200
500
nA
P
O
Output Power
THD+N = 0.1% Max, F = 1kHz, R
L
= 32
THD+N = 1% Max, F = 1kHz, R
L
= 32
THD+N = 0.1% Max, F = 1kHz, R
L
= 16
THD+N = 1% Max, F = 1kHz, R
L
= 16
23
36
27
28
38
42
mW
THD + N
Total Harmonic Distortion + Noise (A
v
=-1)
1)
R
L
= 32
,
P
out
= 16mW, 20Hz
F
20kHz
R
L
= 16
,
P
out
= 35mW, 20Hz
F
20kHz
1. Fig. 68 to 79 show dispersion of these parameters.
0.03
0.03
%
PSRR
Power Supply Rejection Ratio (A
v
=1), inputs floating
F = 100Hz
,
Vripple = 100mVpp
80
dB
I
O
Max Output Current
THD +N < 1%, R
L
= 16
connected between out and V
CC
/2
64
75
mA
V
O
Output Swing
V
OL
: R
L
= 32
V
OH
: R
L
= 32
V
OL
: R
L
= 16
V
OH
: R
L
= 16
2.85
2.68
0.3
3
0.45
2.85
0.38
0.52
V
SNR
Signal-to-Noise Ratio (Filter Type A, A
v
=-1)
(R
L
= 32
,
THD +N < 0.2%, 20Hz
F
20kHz)
92
107
dB
Crosstalk
Channel Separation, R
L
= 32
F = 1kHz
F = 20Hz to 20kHz
Channel Separation, R
L
= 16
F = 1kHz
F = 20Hz to 20kHz
100
80
100
80
dB
C
I
Input Capacitance
1
pF
GBP
Gain Bandwith Product (R
L
= 32
)
1.2
2
MHz
SR
Slew Rate, Unity Gain Inverting (R
L
= 16
)
0.45
0.7
V/s
TS482
5/24
ELECTRICAL CHARACTERISTICS
V
CC
= +2.5V, GND = 0V, T
amb
= 25C (unless otherwise specified)
2)
2. All electrical values are guaranted with correlation measurements at 2V and 5V
Symbol
Parameter
Min.
Typ.
Max.
Unit
I
CC
Supply Current
No input signal, no load
5.1
7.2
mA
V
IO
Input Offset Voltage (V
ICM
= V
CC
/2)
1
5
mV
I
IB
Input Bias Current (V
ICM
= V
CC
/2)
200
500
nA
P
O
Output Power
THD+N = 0.1% Max, F = 1kHz, R
L
= 32
THD+N = 1% Max, F = 1kHz, R
L
= 32
THD+N = 0.1% Max, F = 1kHz, R
L
= 16
THD+N = 1% Max, F = 1kHz, R
L
= 16
12.5
17.5
13.5
14.5
20.5
22
mW
THD + N
Total Harmonic Distortion + Noise (A
v
=-1)
1)
R
L
= 32
,
P
out
= 10mW, 20Hz
F
20kHz
R
L
= 16
,
P
out
= 16mW, 20Hz
F
20kHz
1. Fig. 68 to 79 show dispersion of these parameters.
0.03
0.03
%
PSRR
Power Supply Rejection Ratio (A
v
=1), inputs floating
F = 100Hz
,
Vripple = 100mVpp
75
dB
I
O
Max Output Current
THD +N < 1%, R
L
= 16
connected between out and V
CC
/2
45
56
mA
V
O
Output Swing
V
OL
: R
L
= 32
V
OH
: R
L
= 32
V
OL
: R
L
= 16
V
OH
: R
L
= 16
2.14
1.97
0.25
2.25
0.35
2.15
0.325
0.45
V
SNR
Signal-to-Noise Ratio (Filter Type A, A
v
=-1)
(R
L
= 32
,
THD +N < 0.2%, 20Hz
F
20kHz)
89
102
dB
Crosstalk
Channel Separation, R
L
= 32
F = 1kHz
F = 20Hz to 20kHz
Channel Separation, R
L
= 16
F = 1kHz
F = 20Hz to 20kHz
100
80
100
80
dB
C
I
Input Capacitance
1
pF
GBP
Gain Bandwidth Product (R
L
= 32
)
1.2
2
MHz
SR
Slew Rate, Unity Gain Inverting (R
L
= 16
)
0.45
0.7
V/s
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