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PDF EUA4890 Data sheet ( Hoja de datos )
| Número de pieza | EUA4890 | |
| Descripción | 1 Watt Audio Power Amplifier | |
| Fabricantes | Eutech Microelectronics | |
| Logotipo |  |
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EUA4890
1 Watt Audio Power Amplifier
DESCRIPTION
The EUA4890 is an audio power amplifier designed for
portable communication device applications such as
mobile phone applications. The EUA4890 is capable of
delivering 1.0W of continuous average power to an 8Ω
BTL and with less than 1% distortion (THD+N) from a
5.0V power supply, and 350mW to a 8Ω BTL load from a
3V power supply.
The EUA4890 provides high quality audio while requiring
few external components and minimal power consumption.
It features a low-power shutdown mode, which is achieved
by driving the SHUTDOWN pin with logic low.
The EUA4890 contains circuitry to prevent from ”pop and
click” noise that would otherwise occur during turn-on and
turn-off transitions.
For maximum flexibility, the EUA4890 provides an
externally controlled gain (with resistors), as well as an
externally controlled turn-on and turn-off times (with the
bypass capacitor).
The EUA4890 is available in a MSOP-8 , 3mm×3mm DFN
package.
FEATURES
z 2.5-5.5V operation
z 65dB PSRR at 217Hz, VDD=5V
z 0.1µA ultra low current shutdown mode
z Improved pop & click circuitry
z No output coupling capacitors, snubber networks or
bootstrap capacitors required
z Thermal shutdown protection
z Unity-gain stable
z External gain configuration capability
z BTL output can drive capacitive loads
z RoHS compliant and 100% lead(Pb)-free
APPLICATIONS
z Mobile Phones
z PDAs
z Portable electronic devices
Block Diagram
DS4890 Ver 1.7 Dec. 2006
Figure1.
1
1 page  
EUA4890Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
Absolute Maximum Ratings
Supply voltage, VDD -------------------------------------------------------------------------------------------- 6V
Input voltage, VI ---------------------------------------------------------------------------- -0.3 V to VDD +0.3V
Storage temperature rang, Tstg ------------------------------------------------------------------- -65°C to 150°C
ESD Susceptibility -------------------------------------------------------------------------------------------- 2kV
Junction Temperature -------------------------------------------------------------------------------------- 150°C
Thermal Resistance
θJC (MSOP) --------------------------------------------------------------------------------------------- 56°C/W
θJA (MSOP) ---------------------------------------------------------------------------------------------- 160°C/W
θJA (DFN) ---------------------------------------------------------------------------------------------- 50°C/W
Electrical Characteristics VDD = 5V, TA = 25°C
Symbol
Parameter
Conditions
IDD Quiescent Power Supply Current
ISD Shutdown Current
VIN=0V, IO=0A, No load
VIN=0V, IO=0A, 8Ω load
VSHUTDOWN=0V
VSDIH Shutdown Voltage Input High
VSDIL Shutdown Voltage Input Low
VOS Output Offset Voltage
ROUT-GND Resistor Output to GND
PO Output Power (8Ω)
TWU Wake-up time
TSD Thermal Shutdown Temperature
THD=1%; f=1kHz
EUA4890
Min Typ Max.
2.4 5
2.5 5
0.1 2.0
1.2
0.4
5 25
7.0 8.5 9.7
1.1
170 220
150 170
THD+N Total Harmonic Distortion + Noise PO=0.4 Wrms; f=1kHz
0.15
PSRR Power Supply Rejection Ratio
Vripple=200mV sine p-p
Input Terminated with 10 ohms
to ground
55
65(f=217
Hz)
67(f=1kH
z)
TSDT Shutdown Time
8Ω load
1.0
Unit
mA
mA
µA
V
V
mV
kΩ
W
ms
°C
%
dB
ms
DS4890 Ver 1.7 Dec. 2006
5
5 Page 
EUA4890Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
Figure27.
Figure28.
Figure29.
Figure30.
Figure31.
DS4890 Ver 1.7 Dec. 2006
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet EUA4890.PDF ] | |
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