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TS486-4 Schematic ( PDF Datasheet ) - STMicroelectronics

Teilenummer TS486-4
Beschreibung 100mW STEREO HEADPHONE AMPLIFIER WITH STANDBY MODE
Hersteller STMicroelectronics
Logo STMicroelectronics Logo 




Gesamt 30 Seiten
TS486-4 Datasheet, Funktion
TS486
TS487
100mW STEREO HEADPHONE AMPLIFIER WITH STANDBY
MODE
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 16with 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 32stereo headset.
Capable of descending to low voltages, it delivers
up to 90mW per channel (into 16loads) 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
Part Temperature Package
Number Range: I D S Q
Gain Marking
TS486
TS487
TS486
TS486-1
TS486-2
TS486-4
TS487
TS487-1
TS487-2
TS487-4
-40, +85°C
external TS486I
external TS487I
• • external K86A
tba tba x1/0dB K86B
tba tba x2/6dB K86C
tba tba x4/12dB K86D
• • external K87A
tba tba x1/0dB K87B
tba tba x2/6dB K87C
tba tba x4/12dB K87D
MiniSO & DFN only available in Tape & Reel with T suffix,
SO is available in Tube (D) and in Tape & Reel (DT)
June 2003
PIN CONNECTIONS (top view)
TS486IDT: SO8, TS486IST, TS486-1IST,
TS486-2IST, TS486-4IST: MiniSO8
OUT (1)
VIN (1)
BYPASS
GND
1
2
3
4
8 VCC
7 OUT (2)
6 VIN (2)
5 SHUTDOWN
TS486-IQT, TS486-1IQT, TS486-2IQT, TS486-4IQT:
DFN8
OUT (1) 1
VIN (1) 2
BYPASS 3
GND 4
8 Vcc
7 OUT (2)
6 VIN (2)
5 SHUTDOWN
TS487IDT: SO8, TS487IST, TS487-1IST,
TS487-2IST, TS487-4IST: MiniSO8
OUT (1)
VIN (1)
BYPASS
GND
1
2
3
4
8 VCC
7 OUT (2)
6 VIN (2)
5 SHUTDOWN
TS487-IQT,
TS487-1IQT, TS487-2IQT, TS487-4IQT: DFN8
OUT (1) 1
VIN (1) 2
BYPASS 3
GND 4
8 Vcc
7 OUT (2)
6 VIN (2)
5 SHUTDOWN
1/31






TS486-4 Datasheet, Funktion
TS486-TS487
ELECTRICAL CHARACTERISTICS
VCC = +2.5V, GND = 0V, Tamb = 25°C (unless otherwise specified)1)
Symbol
Parameter
Min.
ICC
Supply Current
No input signal, no load
ISTANDBY
Standby Current
No input signal, VSTANDBY=GND for TS486, RL=32
No input signal, VSTANDBY=Vcc for TS487, RL=32
VIO Input Offset Voltage (VICM = VCC/2)
IIB Input Bias Current (VICM = VCC/2) 2)
Output Power
THD+N = 0.1% Max, F = 1kHz, RL = 32
PO THD+N = 1% Max, F = 1kHz, RL = 32
THD+N = 0.1% Max, F = 1kHz, RL = 16
THD+N = 1% Max, F = 1kHz, RL = 16
THD + N
Total Harmonic Distortion + Noise (Av=-1)
RL = 32Ω, Pout = 10mW, 20Hz F 20kHz
RL = 16Ω, Pout = 16mW, 20Hz F 20kHz
PSRR
Power Supply Rejection Ratio, inputs grounded 3)
(Av=-1), RL>=16, CB=1µF, F = 1kHz, Vripple = 200mVpp
IO
Max Output Current
THD +N 1%, RL = 16connected between out and VCC/2
Output Swing
VOL : RL = 32
VO VOH : RL = 32
VOL : RL = 16
VOH : RL = 16
SNR
Signal-to-Noise Ratio (A weighted, Av=-1) 3)
(RL = 32Ω, THD +N < 0.4%, 20Hz F 20kHz)
Crosstalk
Channel Separation, RL = 32Ω, Av=-1
F = 1kHz
F = 20Hz to 20kHz
Channel Separation, RL = 16Ω, Av=-1
F = 1kHz
F = 20Hz to 20kHz
CI Input Capacitance
GBP Gain Bandwidth Product (RL = 32Ω)
SR Slew Rate, Unity Gain Inverting (RL = 16Ω)
1. All electrical values are guaranted with correlation measurements at 2V and 5V.
2. Only for external gain version.
3. Guaranteed by design and evaluation.
12.5
17.5
53
45
2.14
1.97
80
Typ.
1.7
10
1
90
13
14
21
22
0.3
0.3
58
56
0.25
2.25
0.35
2.15
95
80
76
77
69
1
1.1
0.4
Max.
2.5
1000
200
0.32
0.45
Unit
mA
nA
mV
nA
mW
%
dB
mA
V
dB
dB
pF
MHz
V/µs
6/31

6 Page









TS486-4 pdf, datenblatt
TS486-TS487
Fig. 19: Output Power vs Power Supply
Voltage
RL = 32
100 F = 1kHz
BW < 125kHz
Tamb = 25°C
75
THD+N=1%
THD+N=10%
50
25 THD+N=0.1%
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
Vcc (V)
Fig. 21: Output Power vs Load Resistor
70 Vcc = 3.3V
F = 1kHz
60
THD+N=1%
BW < 125kHz
Tamb = 25°C
50
40
THD+N=10%
30
20
THD+N=0.1%
10
0
8 16 24 32 40 48 56 64
Load Resistance ( )
Fig. 23: Output Power vs Load Resistor
25
Vcc = 2V
F = 1kHz
20 BW < 125kHz
THD+N=1%
Tamb = 25°C
15
THD+N=10%
10
5
THD+N=0.1%
0
8 16 24 32 40 48 56 64
Load Resistance ( )
Fig. 20: Output Power vs Load Resistor
200
180
160
140
120
100
80
60
40
20
0
8
THD+N=1%
Vcc = 5V
F = 1kHz
BW < 125kHz
Tamb = 25°C
THD+N=10%
THD+N=0.1%
16 24 32 40 48 56 64
Load Resistance ( )
Fig. 22: Output Power vs Load Resistor
50
45 Vcc = 2.5V
F = 1kHz
40 BW < 125kHz
35
THD+N=1%
Tamb = 25°C
30
25
THD+N=10%
20
15
10
5 THD+N=0.1%
0
8 16 24 32 40 48 56 64
Load Resistance ( )
Fig. 24: Power Dissipation vs Output Power
Vcc=5V
80 F=1kHz
THD+N<1%
60
40
20
RL=16
RL=32
0
0 20 40 60 80 100
Output Power (mW)
12/31

12 Page





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