NJU8725 Datasheet, PDF (1/13 Pages) List of Unclassifed Manufacturers – CLASS D AMPLIFIER FOR DIGITAL AUDIO

NJU8725
PRELIMINARY
CLASS D AMPLIFIER FOR DIGITAL AUDIO
! GENERAL DESCRIPTION
The NJU8725 is an 800mW-output class D
Amplifier featuring 6^th ∆Σ 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 NJU8725
realizes very high power-efficiency by class D
operation. Therefore, it is suitable for battery-powered
applications and others.
! PACKAGE OUTLINE
NJU8725V
! FEATURES
! PIN CONFIGURATION
# Stereo BTL Power Amplifier
# Sixth-order 32f_S Over Sampling ∆Σ & PWM
V_DD
1
24
# Internal 8f_S Over Sampling Digital Filter
# Sampling Frequency : 96kHz (Max.)
# De-Emphasis
: 32kHz, 44.1kHz, 48kHz
STBY
2
TEST
3
23
22
# System Clock
: 256f_S
MUTE
4
21
# Digital Processing : Attenuator 107step, LOG Curve ^VDDL
5
20
: Mute
OUT_LP
6
19
#
#
Digital Audio Interface : 16bit, 18bit
: I²S, LSB Justified, MSB Justified
Short Circuit Protection
V_SSL
OUT_LN
7
8
18
17
# Operating Voltage : 3.0 to 3.6V
V_DDL
9
16
# Driving Voltage
: V_DD to 5.25V
# C-MOS Technology
# Package Outline
: SSOP24
MODE
10
15
RST
11
14
V_SS
12
13
F0/DATA
F1/REQ
F2/SCK
DIN
V_DDR
OUT_RP
V_SSR
OUT_RN
V_DDR
LRCK
BCK
MCK
! BLOCK DIAGRAM
V_DD
V_SS
RST
MCK
LRCK
BCK
DIN
MUTE
STBY
MODE
F0/DATA
F1/REQ
F2/SCK
Power On
Reset Circuit
Synchronization
Circuit
Serial
Audio Data
Interface
System
Control
Short Circuit
Protection
8f_S
Over Sampling
Digital Filter
32f_S 6^th ∆Σ
&
PWM
V_DDL
OUT_LP
V_SSL
V_DDL
OUT_LN
V_SSL
V_DDR
OUT_RP
V_SSR
V_DDR
OUT_RN
V_SSR
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