1/31
s
OPERATING FROM Vcc=2V to 5.5V
s
STANDBY MODE ACTIVE LOW (TS486) or
HIGH (TS487)
s
OUTPUT POWER: 102mW @5V, 38mW
@3.3V into 16
with 0.1% THD+N max (1kHz)
s
LOW CURRENT CONSUMPTION: 2.5mA max
s
High Signal-to-Noise ratio: 103dB(A) at 5V
s
High Crosstalk immunity: 83dB (F=1kHz)
s
PSRR: 58 dB (F=1kHz), inputs grounded
s
ON/OFF click reduction circuitry
s
Unity-Gain Stable
s
SHORT CIRCUIT LIMITATION
s
Available in SO8, MiniSO8 & DFN 3x3mm
DESCRIPTION
The TS486/7 is a dual audio power amplifier capa-
ble of driving, in single-ended mode, either a 16 or
a 32
stereo headset.
Capable of descending to low voltages, it delivers
up to 90mW per channel (into 16
loads) of con-
tinuous average power with 0.3% THD+N in the
audio bandwitdth from a 5V power supply.
An externally-controlled standby mode reduces
the supply current to 10nA (typ.). The unity gain
stable TS486/7 can be configured by external
gain-setting resistors or used in a fixed gain ver-
sion.
APPLICATIONS
s
Headphone Amplifier
s
Mobile phone, PDA, computer motherboard
s
High end TV, portable audio player
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: I
Package
Gain
Marking
D
S
Q
TS486
-40, +85C
external
TS486I
TS487
external
TS487I
TS486
external
K86A
TS486-1
tba tba x1/0dB
K86B
TS486-2
tba tba x2/6dB
K86C
TS486-4
tba tba x4/12dB
K86D
TS487
external
K87A
TS487-1
tba tba x1/0dB
K87B
TS487-2
tba tba x2/6dB
K87C
TS487-4
tba tba x4/12dB
K87D
TS487IDT: SO8, TS487IST, TS487-1IST,
TS487-2IST, TS487-4IST: MiniSO8
TS486-IQT, TS486-1IQT, TS486-2IQT, TS486-4IQT:
DFN8
1
2
3
4
5
8
7
6
BYPASS
GND
SHUTDOWN
Vcc
OUT
(2)
OUT
(1)
V
IN (2)
V
IN (1)
1
2
3
4
5
8
7
6
BYPASS
GND
SHUTDOWN
Vcc
OUT
(2)
OUT
(1)
V
IN (2)
V
IN (1)
1
2
3
4
5
8
7
6
BYPASS
GND
SHUTDOWN
Vcc
OUT
(2)
OUT
(1)
V
IN (2)
V
IN (1)
1
2
3
4
5
8
7
6
BYPASS
GND
SHUTDOWN
Vcc
OUT
(2)
OUT
(1)
V
IN (2)
V
IN (1)
TS487-IQT,
TS487-1IQT, TS487-2IQT, TS487-4IQT: DFN8
TS486IDT: SO8, TS486IST, TS486-1IST,
TS486-2IST, TS486-4IST: MiniSO8
OUT (1)
4
3
2
1
BYPASS
GND
VCC
OUT (2)
VIN (2)
SHUTDOWN
VIN (1)
5
6
7
8
OUT (1)
4
3
2
1
BYPASS
GND
VCC
OUT (2)
VIN (2)
SHUTDOWN
VIN (1)
5
6
7
8
OUT (1)
4
3
2
1
BYPASS
GND
VCC
OUT (2)
VIN (2)
SHUTDOWN
VIN (1)
5
6
7
8
OUT (1)
4
3
2
1
BYPASS
GND
VCC
OUT (2)
VIN (2)
SHUTDOWN
VIN (1)
5
6
7
8
OUT (1)
4
3
2
1
BYPASS
GND
VCC
OUT (2)
VIN (2)
SHUTDOWN
VIN (1)
5
6
7
8
TS486
TS487
100mW STEREO HEADPHONE AMPLIFIER WITH STANDBY
MODE
June 2003
TS486-TS487
2/31
ABSOLUTE MAXIMUM RATINGS
OPERATING CONDITIONS
Symbol
Parameter
Value
Unit
V
CC
Supply voltage
1)
6
V
V
i
Input Voltage
-0.3v to V
CC
+
0.3v
V
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): TS486, TS487
3)
1.5
kV
ESD
Machine Model - 220pF - 240pF (pin to pin)
100
V
Latch-up Latch-up Immunity (All pins)
200
mA
Lead Temperature (soldering, 10sec)
250
C
Output Short-Circuit to Vcc or GND
continous
4)
1. All voltage values are measured with respect to the ground pin.
2. Pd has been calculated with Tamb = 25C, Tjunction = 150C.
3. TS487 stands 1.5KV on all pins except standby pin which stands 1KV.
4. Attention must be paid to continous power dissipation (V
DD
x 300mA). Exposure of the IC to a short circuit for an extended time period is
dramatically reducing product life expectancy.
Symbol
Parameter
Value
Unit
V
CC
Supply Voltage
2 to 5.5
V
R
L
Load Resistor
16
T
oper
Operating Free Air Temperature Range
-40 to + 85
C
C
L
Load Capacitor
R
L
= 16 to 100
R
L
> 100
400
100
pF
V
STB
Standby Voltage Input
TS486 ACTIVE / TS487 in STANDBY
TS486 in STANDBY / TS487 ACTIVE
1.5
V
STB
V
CC
GND
V
STB
0.4
1)
V
R
THJA
Thermal Resistance Junction to Ambient
SO8
MiniSO8
DFN8
2)
150
190
41
C/W
1.
The minimum current consumption (
I
STANDBY) is guaranteed at GND (TS486) or V
CC
(TS487) for the whole temperature range.
2. When mounted on a 4-layer PCB.
TS486-TS487
3/31
FIXED GAIN VERSION SPECIFIC ELECTRICAL CHARACTERISTICS
V
CC
from +5V to +2V, GND = 0V, T
amb
= 25C (unless otherwise specified)
APPLICATION COMPONENTS INFORMATION
TYPICAL APPLICATION SCHEMATICS
Symbol
Parameter
Min.
Typ.
Max.
Unit
R
IN 1,2
Input Resistance
1)
1.
See figure 30 to establish the value of Cin vs. -3dB cut off frequency.
20
k
G
Gain value for Gain TS486/TS487-1
Gain value for Gain TS486/TS487-2
Gain value for Gain TS486/TS487-4
0dB
6dB
12dB
dB
Components
Functional Description
R
IN1,2
Inverting input resistor which sets the closed loop gain in conjunction with R
FEED
. This resistor also
forms a high pass filter with C
IN
(fc = 1 / (2 x Pi x R
IN
x C
IN
)) . Not needed in fixed gain versions.
C
IN1,2
Input coupling capacitor which blocks the DC voltage at the amplifier's input terminal.
R
FEED1,2
Feedback resistor which sets the closed loop gain in conjunction with R
IN
.
A
V
= Closed Loop Gain= -R
FEED
/R
IN
. Not needed in fixed gain versions.
C
S
Supply Bypass capacitor which provides power supply filtering.
C
B
Bypass capacitor which provides half supply filtering.
C
OUT1,2
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 R
L
x C
OUT
)).
TS486-TS487
4/31
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
1.8
2.5
mA
I
STANDBY
Standby Current
No input signal, V
STANDBY
=GND for TS486, R
L
=32
No input signal, V
STANDBY
=Vcc for TS487, R
L
=32
10
1000
nA
V
IO
Input Offset Voltage (V
ICM
= V
CC
/2)
1
mV
I
IB
Input Bias Current (V
ICM
= V
CC
/2)
1)
1. Only for external gain version.
90
200
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
64
65
102
108
mW
THD + N
Total Harmonic Distortion + Noise (A
v
=-1)
R
L
= 32
,
P
out
= 60mW, 20Hz
F
20kHz
R
L
= 16
,
P
out
= 90mW, 20Hz
F
20kHz
0.3
0.3
%
PSRR
Power Supply Rejection Ratio, inputs grounded
2)
(A
v
=-1), RL>=16
, C
B
=1
F, F = 1kHz
,
Vripple = 200mVpp
2. Guaranteed by design and evaluation.
53
58
dB
I
O
Max Output Current
THD +N
1%, R
L
= 16
connected between out and V
CC
/2
106
115
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
0.45
4.52
0.6
4.35
0.5
0.7
V
SNR
Signal-to-Noise Ratio (A weighted, A
v
=-1)
2)
(R
L
= 32
,
THD +N < 0.4%, 20Hz
F
20kHz)
80
103
dB
Crosstalk
Channel Separation, R
L
= 32
,
A
v
=-1
F = 1kHz
F = 20Hz to 20kHz
Channel Separation, R
L
= 16
,
A
v
=-1
F = 1kHz
F = 20Hz to 20kHz
83
79
80
72
dB
C
I
Input Capacitance
1
pF
GBP
Gain Bandwidth Product (R
L
= 32
)
1.1
MHz
SR
Slew Rate, Unity Gain Inverting (R
L
= 16
)
0.4
V/s
TS486-TS487
5/31
ELECTRICAL CHARACTERISTICS
V
CC
= +3.3V, GND = 0V, T
amb
= 25C (unless otherwise specified)
1)
1.
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
1.8
2.5
mA
I
STANDBY
Standby Current
No input signal, V
STANDBY
=GND for TS486, R
L
=32
No input signal, V
STANDBY
=Vcc for TS487, R
L
=32
10
1000
nA
V
IO
Input Offset Voltage (V
ICM
= V
CC
/2)
1
mV
I
IB
Input Bias Current (V
ICM
= V
CC
/2)
2)
2. Only for external gain version.
90
200
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
26
28
38
42
mW
THD + N
Total Harmonic Distortion + Noise (A
v
=-1)
R
L
= 32
,
P
out
= 16mW, 20Hz
F
20kHz
R
L
= 16
,
P
out
= 35mW, 20Hz
F
20kHz
0.3
0.3
%
PSRR
Power Supply Rejection Ratio, inputs grounded
3)
(A
v
=-1), RL>=16
, C
B
=1
F, F = 1kHz
,
Vripple = 200mVpp
3. Guaranteed by design and evaluation.
53
58
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 (A weighted, A
v
=-1)
3)
(R
L
= 32
,
THD +N < 0.4%, 20Hz
F
20kHz)
80
98
dB
Crosstalk
Channel Separation, R
L
= 32
,
A
v
=-1
F = 1kHz
F = 20Hz to 20kHz
Channel Separation, R
L
= 16
,
A
v
=-1
F = 1kHz
F = 20Hz to 20kHz
80
76
77
69
dB
C
I
Input Capacitance
1
pF
GBP
Gain Bandwidth Product (R
L
= 32
)
1.1
MHz
SR
Slew Rate, Unity Gain Inverting (R
L
= 16
)
0.4
V/s
PDF 
ZIP