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NJU8721V Datasheet

  • NJU8721V

  • CLASS D HEADPHONE AMPLIFIER FOR DIGITAL AUDIO

  • 165.47KB

  • 13頁

  • NJRC

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NJU8721
PRELIMINARY
CLASS D HEADPHONE AMPLIFIER FOR DIGITAL AUDIO
!
GENERAL DESCRIPTION
The
NJU8721
is a class D Headphone Amplifier
th
featuring 6
鈭單?/div>
modulation.
It includes Digital
Attenuator, Mute, and De-emphasis circuits.
It
converts Digital source input to PWM signal output
which is output PWM signal converted to analog
signal with simple external LC Filter. The
NJU8721
realizes very high power-efficiency by class D
operation. Therefore, it is suitable for portable audio
set and others.
!
PACKAGE OUTLINE
NJU8721V
!
FEATURES
#
Stereo Headphone Power Amplifier
: 50mW+50mW
#
Sixth-order 32f
S
Over Sampling
鈭單?/div>
& PWM
#
Internal 8f
S
Over Sampling Digital Filter
#
Sampling Frequency : 96kHz (Max.)
#
De-Emphasis
: 32kHz, 44.1kHz, 48kHz
#
System Clock
: 256f
S
#
Digital Processing
: Attenuator 107step, LOG Curve
: Mute
#
Digital Audio Interface : 16bit, 18bit
2
: I S, LSB Justified, MSB Justified
#
Operating Voltage
: 3.0 to 3.6V
#
Driving Voltage
: V
DD
to 5.25V
#
C-MOS Technology
#
Package Outline
: SSOP20
!
PIN CONFIGURATION
STBY
TEST
V
SSR
OUT
R
V
DDR
V
DDL
OUT
L
V
SSL
MODE
RST
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
DD
F0/DATA
F1/REQ
F2/SCK
MUTE
DIN
LRCK
BCK
MCK
V
SS
!
BLOCK DIAGRAM
V
DD
V
SS
RST
MCK
LRCK
BCK
DIN
MUTE
STBY
MODE
F0/DATA
F1/REQ
F2/SCK
Power On
Reset Circuit
V
DDL
Synchronization
Circuit
Serial
Audio Data
Interface
8f
S
Over Sampling
Digital Filter
32f
S
6
鈭單?/div>
&
PWM
th
OUT
L
V
SSL
V
DDR
OUT
R
System
Control
V
SSR
-1-

NJU8721V相關(guān)型號(hào)PDF文件下載

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  • 英文版
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    3V Operation Switching Driver for Class D Amplifier
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