LX1701

Microsemi

Integrated Products Division

11861 Western Avenue, Garden Grove CA. 92841 714-898-8121, FAX 714-893-2570

Page 3

2W Filterless Mono Class-D Audio Amplifier

Copyright

© 2004

Rev. 1.0a, 2004-07-09

TM

®

SY STEM CHARACT ER ISTICS

noted and the following test conditions: Default settings: 20Hz corner low frequency, 14dB gain.

LX1701

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

No Load, VDD = PVDD = 1.8V

0.9

1.2

No Load, VDD = PVDD = 3.3V

1.3

1.8

Supply Current, Quiescent

IQQ

No Load, VDD = PVDD = 5.0V

2.0

2.5

mA

Supply Current, Shutdown Mode

IQQSD

Disable pin active

1

µA

THD+N = 1%

1.3

VDD = PVDD = 5V,

Fin = 1kHz

THD+N = 10%

1.8

THD+N = 1%

0.5

Output Power @ 8 Ohms

PO

VDD = PVDD = 3.3V,

Fin = 1kHz

THD+N = 10%

0.7

W

THD+N = 1%

2.1

VDD = PVDD = 5V,

Fin = 1kHz

THD+N = 10%

2.8

THD+N = 1%

0.9

Output Power @ 4 Ohms

PO

VDD = PVDD = 3.3V,

Fin = 1kHz

THD+N = 10%

1.2

W

THD+N = 1%

3.0

VDD = PVDD = 5V,

Fin = 1kHz

THD+N = 10%

3.9

THD+N = 1%

1.3

Output Power @ 2 Ohms

PO

VDD = PVDD = 3.3V,

Fin = 1kHz

THD+N = 10%

1.8

W

Power Efficiency

η

VDD = PVDD = 5V, Fin = 1kHz, RL = 8

Ω

85

%

Total Harmonic Distortion @ 50% of

Max Power

THD+N

VDD = PVDD = 5V, Fin = 1kHz, RL = 8

Ω

0.09

%

Signal-to-Noise Ratio

SNR

VDD = PVDD = 5V, F = 1KHz, PO = 1W,

A-Weighted

99

dB

Output Noise Floor

VN

Input Grounded A-weighted 20-20kHz

25

FLO

3dB relative to 1kHz, BW Select = VSS

20

Hz

Frequency Response Lower Corner

Frequency

FHI

3dB relative to 1kHz, BW Select = VDD

300

Hz

Frequency Response

VDD = PVDD = 1.8 to 5.5V, RL = 4 Ω ,

PO = 200mW @ 20~80KHz, filterless

3

dB

Power Supply Rejection Ratio

PSRR

VDD = PVDD = 1.8V to 5.5V

65

dB

Common Mode Rejection Ratio

CMRR

VDD = PVDD = 1.8V to 5.5V

70

dB

Pin 9 tied to VDD, VDD = PVDD = 1.8V to 5.5V

14

Gain

GSYS

Pin 9 tied to VSS, VDD = PVDD = 1.8V to 5.5V

8

dB