NJU8714VB2-TE2 NJR, NJU8714VB2-TE2 Datasheet

Audio DSPs Class D for Piezo

NJU8714VB2-TE2

Manufacturer Part Number
NJU8714VB2-TE2
Description
Audio DSPs Class D for Piezo
Manufacturer
NJR
Datasheet

Specifications of NJU8714VB2-TE2

Mounting Style
SMD/SMT
Package / Case
SSOP-14
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Ver.2004-05-21
GENERAL DESCRIPTION
for class D amplifier. It receives PWM/PDM signals from
DSP outputs, and drives headphones or speakers by BTL
outputs.
N-channel FETs, and output voltage levels can be
controlled by variable power supply with keeping all of
input signal information.
which eliminate AC coupling capacitors. Also, it provides
“SEL”
“Asynchronous”. “Asynchronous” can be reduced the
operating current. Therefore, it is suitable for portable
audio set and others.
FEATURES
BLOCK DIAGRAM
2-channel 1bit Audio Signal Input
Stereo BTL Outputs
Output Power
BEEP Function
Standby Function
Output Driver Control Function
Operating Voltage
CMOS Technology
Package Outline :SSOP20-B2
The NJU8714 is a stereo BTL outputs switching driver
Output drivers are composed of Series-Connected
The NJU8714 incorporates BTL outputs amplifiers,
BEEP
STBYB
HALTB
terminal
MCK
SEL
D
D
IN1
IN2
IN
STEREO BTL OUTPUTS SWITCHING DRIVER
V
: Typ.150mW@8Ω
which
DD
V
V
V
V
SS
DD
DDO
G
: 4.5V to 5.25V
: 1.7V to 2.7V
Level
Shifter
selects
Level
Shifter
Level
Shifter
Level
Shifter
Level
Shifter
Level
Shifter
: 0V to 2.0V
FOR Class D AMPLIFIER
“Synchronous”
Control
Control
Logic
V
Logic
G
or
BEEP
HALTB
OUT
O
OUT
V
MCK
BEEP1
V
DDO1
D
PACKAGE OUTLINE
PIN CONFIGURATION
V
SSO
IN1
SS
1X
IN
1
Driver
Driver
Pre
Pre
1
2
3
4
5
6
7
8
9
10
NJU8714VB2
20
19
18
17
16
15
14
13
12
11
NJU3555
NJU3555
NJU8714
V
O
O
OUT
OUT
OUT
V
OUT
V
V
SEL
STBYB
D
V
O
OUT
V
OUT
V
V
DDO1
BEEP1
SSO
BEEP2
DDO2
DD
G
SSO
DDO2
IN2
SSO
BEEP2
1
1X
2X
2
2
2X
- 1 -

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NJU8714VB2-TE2 Summary of contents

Page 1

... SEL BEEP IN Ver.2004-05-21 FOR Class D AMPLIFIER selects “Synchronous” or HALTB BEEP : 0V to 2.0V OUT V G Level Shifter Control Logic Level Shifter Control Logic Level Shifter Level Shifter Level Shifter Level Shifter PACKAGE OUTLINE NJU8714VB2 PIN CONFIGURATION MCK IN1 BEEP1 OUT SSO 9 ...

Page 2

NJU8714 TERMINAL DESCRIPTION No. SYMBOL 1 MCK HALTB 4 D IN1 5 BEEP BEEP1 7 OUT 1 8,13 V SSO 9 OUT DDO1 11 V DDO2 12 OUT 2X 14 ...

Page 3

FUNCTIONAL DESCRIPTION (1) Signal Output The OUT and OUT 1/1X 2/2X converted to analog signals via external 2nd-order or higher LC filter. A switching regulator with a high response against a voltage fluctuation is the best selection for the V ...

Page 4

NJU8714 ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage Input Voltage Operating Temperature Storage Temperature Power Dissipation Note.1) All voltage values are specified as V Note.2) If the LSI is used on condition beyond the absolute maximum rating, the LSI may be ...

Page 5

TIMING CHARACTERISTICS Audio Signal Input MCK D ,D IN1 IN2 (Ta= =2.5V PARAMETER MCK Frequency MCK Pulse Width (H) MCK Pulse Width ( Setup Time IN1 IN2 D ,D Hold Time IN1 IN2 BEEP ...

Page 6

NJU8714 APPLICATION CIRCUIT -Load Impedance: 32Ω MCK(1) HALTB(3) STBYB(18) SEL(19 10uF 2. -Load Impedance: 8Ω MCK(1) HALTB(3) STBYB(18) SEL(19 10uF 2. Note 3) De-coupling capacitors must ...

Page 7

Ver.2004-05-21 NJU8714 NJU3555 NJU3555 [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the ...

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