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PDF TS4995 Data sheet ( Hoja de datos )
| Número de pieza | TS4995 | |
| Descripción | 1.2 W fully differential audio power amplifier | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TS4995 (archivo pdf) en la parte inferior de esta página. Total 26 Páginas | ||
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TS4995
1.2 W fully differential audio power amplifier
with selectable standby and 6 dB fixed gain
Features
■ Differential inputs
■ 90 dB PSRR @ 217 Hz with grounded inputs
■ Operates from VCC = 2.5 V to 5.5 V
■ 1.2 W rail-to-rail output power @ VCC=5 V,
www.DataSheTeHt4DU+.cNom=1%, F=1 kHz, with an 8 Ω load
■ 6 dB integrated fixed gain
■ Ultra-low consumption in standby mode
(10 nA)
■ Selectable standby mode (active low or active
high)
■ Ultra-fast startup time: 10 ms typ. at VCC=3.3 V
■ Available in 9-bump flip chip (300 mm bump
diameter)
■ Ultra-low pop and click
Applications
■ Mobile phones (cellular / cordless)
■ PDAs
■ Laptop / notebook computers
■ Portable audio devices
Description
The TS4995 is an audio power amplifier capable
of delivering 1.2 W of continuous RMS output
power into an 8 Ω load at 5 V. Thanks to its
differential inputs, it exhibits outstanding noise
immunity.
An external standby mode control reduces the
supply current to less than 10 nA. A STBY MODE
pin allows the standby pin to be active high or
low. An internal thermal shutdown protection is
also provided, making the device capable of
sustaining short-circuits.
TS4995 - Flip chip 9
Pin connections (top view)
Gnd
VO- 7 6 5 VO+
Bypass 8 9 4 Stdby
VIN+ 1 2 3 VIN-
VCC Stdby Mode
The TS4995 features an internal fixed gain at 6dB
which reduces the number of external
components on the application board.
The device is equipped with common mode
feedback circuitry allowing outputs to be always
biased at VCC/2 regardless of the input common
mode voltage.
The TS4995 is specifically designed for high
quality audio applications such as mobile phones
and requires few external components.
March 2008
Rev 3
1/26
www.st.com
26
1 page  
TS4995
3 Electrical characteristics
Electrical characteristics
Table 4.
Symbol
VCC = +5V, GND = 0V, Tamb = 25°C (unless otherwise specified)
Parameter
Test conditions
Min. Typ. Max. Unit
ICC Supply current
ISTBY Standby current
Voo
Differential output offset
voltage
No input signal, no load
No input signal, VSTBY = VSM = GND, RL = 8Ω
No input signal, VSTBY = VSM = VCC, RL = 8Ω
No input signal, RL = 8Ω
4 7 mA
10 1000 nA
0.1 10 mV
VIC Input common mode voltage
0 4.5
Po Output power
www.DataTShHeDet+4UN.cTnooomtiasel harmonic distortion +
THD = 1% Max, F= 1kHz, RL = 8Ω
Po = 850mW rms, 20Hz ≤ F ≤ 20kHz, RL = 8Ω
0.8 1.2
0.5
V
W
%
PSRRIG
Power supply rejection ratio
with inputs grounded(1)
F = 217Hz, R = 8Ω, Cin = 4.7µF, Cb =1µF
Vripple = 200mVPP
CMRR
Common mode rejection ratio
F = 217Hz, RL = 8Ω,
Vic = 200mVPP
Cin = 4.7µF, Cb =1µF
SNR Signal-to-noise ratio
A-weighted filter
RL = 8Ω, THD +N < 0.7%, 20Hz ≤ F ≤ 20kHz
GBP Gain bandwidth product
RL = 8Ω
VN Output voltage noise
20Hz ≤ F ≤ 20kHz, RL = 8Ω
Unweighted
A-weighted
Unweighted, standby
A-weighted, standby
75(2) 90
60
100
2
11
7
3.5
1.5
dB
dB
dB
MHz
µVRMS
Zin Input impedance
15 20 25
- Gain mismatch
5.5 6 6.5
tWU Wake-up time(3)
Cb =1µF
15
1. Dynamic measurements - 20*log(rms(Vout)/rms (Vripple)). Vripple is the super-imposed sinus signal relative to VCC.
2. Guaranteed by design and evaluation.
3. Transition time from standby mode to fully operational amplifier.
kΩ
dB
ms
5/26
5 Page 
TS4995
Electrical characteristics
Figure 20. THD+N vs. frequency
10
RL = 8Ω
G = 6dB
Cb = 1μF
BW < 125kHz
1 Tamb = 25C
Vcc=2.6V, Po=225mW
Vcc=5V, Po=850mW
0.1
Vcc=3.3V, Po=300mW
0.01
www.DataSheet4U.com
100 1000
Frequency (Hz)
Figure 22. THD+N vs. frequency
10000
10
RL = 16Ω
G = 6dB
Cb = 1μF
BW < 125kHz
1 Tamb = 25C
Vcc=5V, Po=500mW
Vcc=2.6V, Po=125mW
0.1
0.01
Vcc=3.3V, Po=225mW
100 1000
Frequency (Hz)
10000
Figure 21. THD+N vs. frequency
10
RL = 8Ω
G = 6dB
Cb = 0
BW < 125kHz
1 Tamb = 25C
Vcc=2.6V, Po=225mW
Vcc=5V, Po=850mW
0.1
Vcc=3.3V, Po=300mW
0.01
100 1000
Frequency (Hz)
10000
Figure 23. THD+N vs. frequency
10
RL = 16Ω
G = 6dB
Cb = 0
BW < 125kHz
1 Tamb = 25C
Vcc=5V, Po=500mW
Vcc=2.6V, Po=125mW
0.1
0.01
Vcc=3.3V, Po=225mW
100 1000
Frequency (Hz)
10000
Figure 24. Output power vs. power supply
voltage
10
RL = 16Ω
G = 6dB
Cb = 1μF
BW < 125kHz
1 Tamb = 25C
Vcc=5V, Po=500mW
Vcc=2.6V, Po=125mW
0.1
0.01
Vcc=3.3V, Po=225mW
100 1000
Frequency (Hz)
10000
Figure 25. Output power vs. power supply
voltage
2,4 Cb = 1μF
2,2 F = 1kHz
2,0 BW < 125 kHz
1,8 Tamb = 25°C
1,6
1,4
1,2
1,0
0,8
0,6
0,4
0,2
0,0
2,5
3,0
3,5
4Ω
4,0
Vcc (V)
8Ω
16Ω
32Ω
4,5 5,0 5,5
11/26
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet TS4995.PDF ] | |
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