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PDF NJU8714 Data sheet ( Hoja de datos )
| Número de pieza | NJU8714 | |
| Descripción | PWM/PDM / SSOP20-B2 | |
| Fabricantes | JRC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NJU8714 (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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www.DataSheet4U.com
NJU38575154
STEREO BTL OUTPUTS SWITCHING DRIVER
FOR Class D AMPLIFIER
GENERAL DESCRIPTION
The NJU8714 is a stereo BTL outputs switching driver
for class D amplifier. It receives PWM/PDM signals from
DSP outputs, and drives headphones or speakers by BTL
outputs.
Output drivers are composed of Series-Connected
N-channel FETs, and output voltage levels can be
controlled by variable power supply with keeping all of
input signal information.
The NJU8714 incorporates BTL outputs amplifiers,
which eliminate AC coupling capacitors. Also, it provides
“SEL” terminal which selects “Synchronous” or
“Asynchronous”. “Asynchronous” can be reduced the
operating current. Therefore, it is suitable for portable
audio set and others.
PACKAGE OUTLINE
NJU8714VB2
FEATURES
2-channel 1bit Audio Signal Input
Stereo BTL Outputs
Output Power : Typ.150mW@8Ω
BEEP Function
Standby Function
Output Driver Control Function
Operating Voltage
CMOS Technology
VDD: 1.7V to 2.7V
VDDO: 0V to 2.0V
VG: 4.5V to 5.25V
Package Outline :SSOP20-B2
PIN CONFIGURATION
MCK
VSS
HALTB
DIN1
BEEPIN
OBEEP1
OUT1
VSSO
OUT1X
VDDO1
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
BLOCK DIAGRAM
VDD VSS
VG
DIN1
Level
Shifter
Control
Logic
Pre
Driver
DIN2
MCK
STBYB
HALTB
SEL
BEEPIN
Level
Shifter
Level
Shifter
Level
Shifter
Level
Shifter
Level
Shifter
Control
Logic
Pre
Driver
VDD
SEL
STBYB
DIN2
VG
OBEEP2
OUT2
VSSO
OUT2X
VDDO2
VDDO1
OUT1
OUT1X
VSSO
VDDO2
OUT2
OUT2X
VSSO
OBEEP1
OBEEP2
Ver.2004-05-21
-1-
1 page  
www.DataSheet4U.com
TIMING CHARACTERISTICS
• Audio Signal Input
MCK
NJU38575154
tMCKH
tMCKL
0.7VDD
0.3VDD
DIN1,DIN2
tDS tDH
0.7VDD
0.3VDD
(Ta=25°C, VDD=2.5V, VDDO1=VDDO2=1.7V, VSS=VSSO=0V,
STBYB=HALTB=SEL=2.5V, fs=44.1kHz, unless otherwise noted)
PARAMETER
SYMBOL CONDITIONS
MIN
TYP
MAX
UNIT
MCK Frequency
fMCKI
8 - 35 MHz
MCK Pulse Width (H)
tMCKH
9 - - ns
MCK Pulse Width (L)
tMCKL
9 - - ns
DIN1,DIN2 Setup Time
tDS
5 - - ns
DIN1,DIN2 Hold Time
tDH
5 - - ns
BEEP Frequency
fb
0.1 20 kHz
• Output Control Signal Input
BEEPIN, HALTB
STBYB, SEL
tUP
0.9VDD
0.1VDD
tDN
(Ta=25°C, VDD=2.5V, VDDO1=VDDO2=1.7V, VSS=VSSO=0V,
STBYB=HALTB=SEL=2.5V, fs=44.1kHz, unless otherwise noted)
PARAMETER
SYMBOL CONDITIONS
MIN
TYP
MAX
UNIT
Rise Time
tUP
- - 50 ns
Fall Time
tDN
- - 50 ns
Ver.2004-05-21
-5-
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet NJU8714.PDF ] | |
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