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PDF NJM2705 Data sheet ( Hoja de datos )
| Número de pieza | NJM2705 | |
| Descripción | Surround Audio Processor for Mobile Applications | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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NJM2705
Surround Audio Processor for Mobile Applications
s GENERAL DESCRIPTION
The NJM2705 is the surround audio processor for mobile
applications.
It regenerates the 3D surround sound with extremely narrow
space two speakers (2SP mode), headphone surround with
normal headphone (HP mode) and reverberation sound with
only one speaker (1SP mode).
It includes mode control switches for surround function and
standby function and realizes low consumption power design by
standby function.
In addition to SSOP16, ultra small and thin packages FFP16
(Flip-Chip Fine Package) and PCSP16 (Plastic Chip Size
Package) is applied.
It is suitable for cellular phone, PDA and portable game.
s PACKAGE OUTLINE
NJM2705PB1
NJM2705SD3
NJM2705V
s FEATURES
q Operating Voltage
1.8 to 6V
q Operating Current
0.7mA typ. at Active mode
1µA max. at Standby mode
q Low Output Noise
10µVrms typ
(2SP/HP/1SP mode, VR : max.)
q Variable Surround Effect by external resistor
(Adjustable for speaker and headphone independently.)
q Standby Function
q Internal Mode Control Switch
q Bipolar Technology
q Package Outline
FFP16, PCSP16, SSOP16
s BLOCK DIAGRAM
LIN
RIN
3D
Filter
3D
Enha ncer
1SP
Surround
LOUT
ROUT
2SP mode
HP mode
1SP mode
Bypass mode
Surround mode
-1-
1 page  
sTERMINAL DESCRIPTION
PIN No.
FFP PCSP SSOP
16 16 16
SYMBOL
FUNCTION
145
236
LIN
RIN
Lch Input
Rch Input
324
413
9 12 14
LOUT
ROUT
LMON
Lch Output
Rch Output
Filter terminal
NJM2705
EQUIVALENT CIRCUIT
V+ V+
Voltage
400 400
6p
VREF
V+ V+ V+
V+
12k 6p
1.15V
1.15V
5 16 2 NFSPR
6 15 1 NFHPR
7 14 16 NFSPL
8 13 15 NFHPL
Filter terminal
Filter terminal
Filter terminal
Filter terminal
10 11 13
PS
Filter terminal
V+ V+
400 6p
1.15V
V+ V+
400 400
6p
1.15V
-5-
5 Page 
sTYPICAL CHARACTERISTICS
NJM2705
Maximum Input Voltage vs. Operating Voltage (BYPASS)
f=1kHz, RL=10kΩ, THD=1%, Ta=25oC
10
5
0
Vin=Lch Vout=Lch
-5 Vin=Rch Vout=Rch
-10
-15
0 12 3 45 67
Operating Voltage [V]
Maximum Input Voltage vs. Operating Voltage (HP)
Ta=25oC, f=100Hz, HP_VR=MAX, RL=10kΩ,THD=1%
-5
-10
-15
Vin=Lch Vout=Lch
Vin=Rch Vout=Rch
-20
-25
-30
0 12 3 4 5 67
Operating Voltage [V]
Maximum Input Voltage vs. Temperature (BYPASS)
V+=3V, f=1kHz, RL=10kΩ
THD=1%
0
-1 Vin=Lch Vout=Lch
-2
Vin=Rch Vout=Rch
-3
-4
-5
-50 -25
0
25 50 75 100 125
Ta [oC]
Maximum Input Voltage vs. Operating Voltage (2SP)
Ta= 25oC, f=100Hz SP_VR=MAX, RL=10kΩ, THD=1%
-5
-10
-15
Vin=Lch Vout=Lch
Vin=Rch Vout=Rch
-20
-25
-30
0 12 3 45 67
Operating Voltage [V]
Maximum Input Voltage vs. Temperature (1SP)
Ta= 25oC, f=100Hz, SP_VR=MAX, RL=10kΩ, THD=1%
-5
-10
-15
Vin=Lch Vout=Lch
Vin=Rch Vout=Lch
-20
-25
-30
0 12 345 67
Operating Voltage [V]
Maximum Input Voltage vs. Temperature (2SP)
V+=3V, f=100Hz, RL=10kΩ
SP_VR=MAX, THD=1%
-15
Vin=Lch Vout=Lch
-16
Vin=Rch Vout=Rch
-17
-18
-19
-20
-50 -25 0 25 50 75 100 125
Ta [oC]
- 11 -
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet NJM2705.PDF ] | |
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