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PDF NJU8752 Data sheet ( Hoja de datos )
| Número de pieza | NJU8752 | |
| Descripción | Analog | |
| Fabricantes | JRC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NJU8752 (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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NJU8N7J5U23/5525B5
www.DataSheet4U.com
PRELIMINARY
Analog Signal Input Class D Amplifier for Piezo Speaker
! GENERAL DESCRIPTION
The NJU8752/NJU8752B is an analog signal input
monaural class D amplifier for Piezo speaker. The
NJU8752/52B includes Inversion operational amplifier
input circuit, PWM modulator, an output-short protector
and a low voltage detector. Input part operates on
3.3V(TYP) as power supply and Output part operates
up to 16.0V(MAX). Therefore, it drives Piezo speaker
with louder sound and High efficiency.
The NJU8752/52B incorporates BTL amplifier, which
eliminate AC coupling capacitors, capable of driving
Piezo speaker with simple external LC low-pass filters.
Class D operation achieves lower power operation for
Piezo speaker, thus the NJU8752/52B is suited for
battery powered applications.
! PACKAGE OUTLINE
NJU8752V / 52BV
NJU8752BKM1
! FEATURES
# Piezo Speaker Driving
# 1-channel Analog Signal Input, 1-channel BTL Output
# Standby(Hi-Z), Mute Control
# Voltage Gain
31dB(NJU8752)
20dB(NJU8752B)
# Built-in Low Voltage Detector
# Built-in Short Protector
# Operating Voltage Input: 2.7 ~ 3.6V (NJU8752)
3.1 ~ 3.6V (NJU8752B)
Output: 6.0 ~ 16.0V
# C-MOS Technology
# Package Outline
SSOP14 (NJU8752 / 52B)
QFN20 / QFN28 (NJU8752B)
NJU8752BKP4
! PIN CONFIGURATION
VDD
IN
TEST 1
MUTEB
VSS
OUTP
VDDO
1
2
3
4
5
6
7
14 VSS
13 COM
12 TEST 2
11 STBYB
10 VSS
9 OUTN
8 VDDO
SSOP14 (NJU8752V / 52BV)
20
1
IN
TEST 1
MUTEB
VSS
OUTP
COM
TEST 2
STBYB
VSS
OUTN
28
1
IN
TEST 1
MUTEB
NC
VSS
NC
OUTP
COM
NC
TEST 2
STBYB
VSS
NC
OUTN
QFN28 (NJU8752BKP4)
Ver.2004-08-05
QFN20 (NJU8752BKM1)
-1-
1 page  
www.DataSheet4U.com
NJU8N7J5U23/5525B5
-NJU8752B-
(Ta=25°C, VDD=3.3V, VDDO=12.0V, VSS=0V,Input Signal=1kHz, Input Signal Level=700mVrms,
Frequency Band=20Hz~20kHz, Load Impedance=0.8µF, 2nd-order 34kHz LC Filter(Q=0.75))
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNIT Note
VDD Supply Voltage
VDDO Supply Voltage
Input Impedance
Voltage Gain
Output THD
VDD
VDDO
ZIN
AV
THD
IN pin
Input Signal Level
=700mVrms
3.1 3.3 3.6 V
6.0 12.0 16.0 V
- 20 - kΩ
- 20 - dB
- 0.05 0.08 % 4
Maximum Output
Vo Output THD=10%
7 10 - Vrms
S/N
SN A weight
- 80 - dB 4
Dynamic Range
Drange A weight
- 83 - dB 4
Maximum Mute Attenuation MAT
- 90 - dB
Operating Current(Stanby)
IST
Operating Current
(No signal input)
IDD
No-load operating
No Signal Input
- - 1 µA
- 3.5 10 mA
Input Voltage
Input Leakage Current
VIH MUTEB, STBYB pins 0.7VDD
-
VDD
V
VIL MUTEB, STBYB pins
0
-
0.3VDD
V
ILK MUTEB, STBYB pins
-
- ±1.0 µA
Note 4) Test system of the output THD, S/N and Dynamic Range
The output THD, S/N and dynamic range are tested in the system shown in Figure 1, where a 2nd-order
LC LPF and another filter incorporated in an audio analyzer are used.
Input Signal
NJU8752/52B
2nd-order
LC LPF
Filter
20kHz
(AES17)
THD
Measuring
Apparatus
NJU8752/52B Test Board
Audio Analyzer
Figure 1. Output THD, S/N and Dynamic Range Test System
2nd-order LPF
Filters
: Refer to “Typical Application Circuit”.
: 22Hz HPF + 20kHz LPF(AES17)
(with the A-Weight filter for S/N and Dynamic-range tests)
Ver.2004-08-05
-5-
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet NJU8752.PDF ] | |
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