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PDF EUA5544 Data sheet ( Hoja de datos )
| Número de pieza | EUA5544 | |
| Descripción | Class AB Stereo Headphone Driver | |
| Fabricantes | EuTech | |
| Logotipo |  |
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EUA5544
Class AB Stereo Headphone Driver
with Shutdown
DESCRIPTION
The EUA5544 is pin compatible with the BH3541/4, and
functionally compatible with the TPA611 series and
LM488 series. As the EUA5544 contains advanced
depop circuitry which eliminates pops & clicks during
shutdown-on and shutdown-off, it can reduces a capacitor
and resistor compared to Mute solution of other devices.
The EUA5544 features an advantage of low-power
consumption shutdown mode, activated by driving the
shutdown pin with logic low. And it also allows fast
turn-on with 1µF bypass capacitor (CB).
The EUA5544 is an integrated class AB stereo headphone
amplifier capable of delivering 68mW per channel of
continuous average power into a 16Ω load or 35mW per
channel into a 32Ω load from a 5V power supply. It also
can operate from a 3V supply, capable of delivering 24
mW into a 32Ω load.
The EUA5544 further integrates a voltage divider inside
the chip. Thus, the external resistors can be eliminated.
The EUA5544 has a fixed gain of 6dB so that external
gain setting is unnecessary.
FEATURES
z No Switch On/Off Clicks
z Wide Power Supply Operation 2.5V– 6V
z Mute Function Compatibility
z High Signal-to-Noise Ratio
z Low Distortion
z Large Output Voltage Swing
z Excellent Power Supply Ripple Rejection
z High Crosstalk Immunity 85dB
z Low Quiescent Current
z Ultra-low Shutdown Current …0.02µA typical
z Short-circuit Protection
z Integrated Voltage Divider (VDD/2) to Eliminate
External Resistors
z Available in SOP-8
APPLICATIONS
z Headphone Amplifier for CD-ROMs
z Portable Audio Equipment
Typical Application Circuit
DS5544 Ver 2.2 Oct.2004
1
1 page  
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EUA5544
Electrical Characteristics VDD = 3.0V
Vin = -6dBV, RL = 32Ω, f = 1KHz, CB = 1µF, TA = 25°C (unless otherwise specified)
Symbol
IQ
ISD
Po
VN
Parameter
Quiescent Current
Shutdown Current
Output Power
Output Noise Voltage
Conditions
Vin = 0V
VSD = GND
RL = 32Ω, THD+N 0.1%, BW 80KHz
RL = 16Ω, THD+N 0.1%, BW 80KHz
BW = 20 20KHz
EUA5544
Min.
Typ.
2.4
0.02
Max.
3
24
37
-95 -94
PSRR
Ripple Rejection
FRR=100Hz, VRR= -20dBV
55 60
Unit
mA
µA
mW
mW
dBV
dB
Electrical Characteristics VDD = 2.5V
Vin = -6dBV, RL = 32Ω, f = 1KHz, CB = 1uF, TA = 25°C (unless otherwise specified)
Symbol
IQ
ISD
Po
Parameter
Quiescent Current
Shutdown Current
Output Power
Conditions
Vin = 0V
VSD = GND
RL = 32Ω, THD+N 0.1%, BW 80KHz
RL = 16Ω, THD+N 0.1%, BW 80KHz
EUA5544
Min. Typ. Max.
2.2 3
0.02
17
22
VN Output Noise Voltage
BW = 20~20KHz
-94
PSRR
Ripple Rejection
FRR=100Hz, VRR= -20dBV
60
Unit
mA
µA
mW
mW
dBV
dB
DS5544 Ver 2.2 Oct.2004
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet EUA5544.PDF ] | |
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