JRC NJM2705 User Manual
NJM2705
NJM2705
Surround Audio Processor for Mobile Applications
■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, an ultra small and thin package FFP16 (Flip-Chip Fine Package) is applied.
It is suitable for cellular phone, PDA and portable game.
■ FEATURES |
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● Operating Voltage |
1.8 to 6V |
● Operating Current |
0.7mA typ. at Active mode |
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1µA max. at Standby mode |
● Low Output Noise |
10 Vrms typ |
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(2SP/HP/1SP mode, VR : max.) |
●Variable Surround Effect by external resistor (Adjustable for speaker and headphone independently.)
●Standby Function
●Internal Mode Control Switch
●Bipolar Technology
● Package Outline |
FFP16, SSOP16 |
■ BLOCK DIAGRAM
■PACKAGE OUTLINE
NJM2705PC1 NJM2705V
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LOUT |
LIN |
3D |
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Enhancer |
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3D |
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Filter |
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1SP |
ROUT |
RIN |
Surround |
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Bypass mode |
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2SP mode |
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Surround mode |
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HP mode |
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1SP mode |
- 1 -
NJM2705
■ PIN CONFIGURATION
FFP16 (Top View)
12 |
11 |
10 |
9 |
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1. |
LIN |
9. |
LMON |
13 |
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8 |
2. |
RIN |
10. |
PS |
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3. |
LOUT |
11. |
SW2 |
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14 |
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4. |
ROUT |
12. |
SW1 |
15 |
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5. |
NFSPR |
13. |
STBY |
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6. |
NFHPR |
14. |
V+ |
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7. |
NFSPL |
15. |
GND |
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8. |
NFHPL |
16. |
VREF |
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SSOP16 (Top View)
1 |
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2 |
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15 |
1. |
NFHPR |
9. |
V+ |
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2. |
NFSPR |
10. |
STBY |
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3. |
ROUT |
11. |
SW1 |
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14 |
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4. |
LOUT |
12. |
SW2 |
4 |
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13 |
5. |
RIN |
13. |
PS |
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6. |
LIN |
14. |
LMON |
5 |
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12 |
7. |
VREF |
15. |
NFHPL |
6 |
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11 |
8. |
GND |
16. |
NFSPL |
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7 |
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8 |
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- 2 -
NJM2705
■ABSOLUTE MAXIMUM RATING (Ta=25° C)
PARAMETER |
SYMBOL |
RATINGS |
UNIT |
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Supply Voltage |
V+ |
7 |
V |
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Power Dissipation |
PD |
(FFP16) 400 |
mW |
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(SSOP16) 300 |
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Operating Temperature Range |
Topr |
-20 to +75 |
° C |
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Storage Temperature Range |
Tstg |
-40 to +125 |
° C |
■OPERATING VOLTAGE
PARAMETER |
SYMBOL |
TEST CONDITION |
MIN |
TYP |
MAX |
UNIT |
Operating Voltage |
V+ |
- |
1.8 |
3.0 |
6.0 |
V |
■ELECTRICAL CHARACTERISTICS (V+=3V, Ta=25° C unless otherwise specified)
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TEST CONDITION |
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PARAMETER |
SYMBOL |
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INPUT |
OUT |
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MODE |
SP |
HP |
MIN |
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TYP |
MAX |
UNIT |
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L |
R |
PUT |
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VR |
VR |
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Operating |
ICC |
No Signal |
0 |
0 |
- |
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Active |
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- |
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450 |
700 |
µ A |
Current |
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0 |
0 |
- |
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Standby |
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- |
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0.1 |
1.0 |
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Reference |
Vref |
No Signal |
0 |
0 |
- |
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- |
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1.0 |
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1.15 |
1.3 |
V |
Voltage |
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●AC CHARACTERISTICS |
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(V+=3V, Ta=25° C, VIN=-20dBV(100mVrms), f=1kHz, RL=10kΩ |
, unless otherwise specified) |
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TEST CONDITION |
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PARAMETER |
SYMBOL |
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INPUT |
OUT |
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MODE |
SP |
HP |
MIN |
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TYP |
MAX |
UNIT |
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L |
R |
PUT |
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VR |
VR |
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Maximum |
VIM1 |
f=1kHz |
VIN |
0 |
L |
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Bypass |
- |
- |
- |
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-2.0 |
- |
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Input Volt age |
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THD=1% |
0 |
VIN |
R |
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(790) |
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VIM2 |
f=100Hz |
VIN |
0 |
L |
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2SP |
MAX |
- |
- |
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-16.0 |
- |
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THD=1% |
0 |
VIN |
R |
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(160) |
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VIM3 |
f=100Hz |
VIN |
0 |
L |
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HP |
- |
MAX |
- |
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-16.0 |
- |
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THD=1% |
0 |
VIN |
R |
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(160) |
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VIM4 |
f=100Hz |
VIN |
0 |
L |
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1SP |
MAX |
- |
- |
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-16.0 |
- |
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THD=1% |
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(160) |
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VIM5 |
f=100Hz |
0 |
VIN |
L |
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1SP |
MAX |
- |
- |
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-14.5 |
- |
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THD=1% |
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(190) |
dBV |
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VIM6 |
V+=1.8V,f=1kHz |
VIN |
0 |
L |
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Bypass |
- |
- |
-10.5 |
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-8.5 |
- |
(mVrms) |
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THD=1% |
0 |
VIN |
R |
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(300) |
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(380) |
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VIM7 |
V+=1.8V,f=100Hz |
VIN |
0 |
L |
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2SP |
MAX |
- |
-24.5 |
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-22.5 |
- |
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THD=1% |
0 |
VIN |
R |
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(60) |
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(75) |
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VIM8 |
V+=1.8V,f=100Hz |
VIN |
0 |
L |
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HP |
- |
MAX |
-24.5 |
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-22.5 |
- |
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THD=1% |
0 |
VIN |
R |
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(60) |
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(75) |
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VIM9 |
V+=1.8V,f=100Hz |
VIN |
0 |
L |
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1SP |
MAX |
- |
-24.5 |
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-22.5 |
- |
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THD=1% |
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(60) |
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(75) |
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VIM10 |
V+=1.8V,f=100Hz |
0 |
VIN |
L |
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1SP |
MAX |
- |
-23.0 |
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-21.0 |
- |
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THD=1% |
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(70) |
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(90) |
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Output Noise |
VNO1 |
Rg=0Ω |
0 |
0 |
L |
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Bypass |
- |
- |
- |
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-112 |
-106 |
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A-Weighted |
R |
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(2.5) |
(5.0) |
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VNO2 |
Rg=0Ω |
0 |
0 |
L |
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1SP |
MAX |
- |
- |
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-100 |
-94 |
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A-Weighted |
R |
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(10) |
(20) |
dBV |
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VNO3 |
Rg=0Ω |
0 |
0 |
L |
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HP |
- |
MAX |
- |
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-100 |
-94 |
(µ Vrms) |
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A-Weighted |
R |
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(10) |
(20) |
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VNO4 |
Rg=0Ω |
0 |
0 |
L |
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1SP |
MAX |
- |
- |
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-100 |
-94 |
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A-Weighted |
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(10) |
(20) |
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- 3 -
NJM2705
●AC CHARACTERISTICS |
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(V+=3V, Ta=25° C, VIN=-20dBV(100mVrms), f=1kHz, RL=10kΩ |
, unless otherwise specified) |
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TEST CONDITION |
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PARAMETER |
SYMBOL |
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MIN |
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TYP |
MAX |
UNIT |
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INPUT |
OUT |
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SP |
HP |
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MODE |
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L |
R |
PUT |
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VR |
VR |
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Total Harmonic |
THD1 |
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f=1kHz |
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VIN |
0 |
L |
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Bypass |
- |
- |
- |
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0.02 |
0.05 |
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Distortion |
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0 |
VIN |
R |
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THD2 |
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f=1kHz |
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VIN |
0 |
L |
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2SP |
MAX |
- |
- |
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0.1 |
0.5 |
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0 |
VIN |
R |
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% |
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THD3 |
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f=1kHz |
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VIN |
0 |
L |
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HP |
- |
MAX |
- |
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0.1 |
0.5 |
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0 |
VIN |
R |
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THD4 |
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f=1kHz |
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VIN |
0 |
L |
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1SP |
MAX |
- |
- |
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0.1 |
0.5 |
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0 |
VIN |
R |
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BYPASS Gain |
GVBYP |
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f=1kHz |
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VIN |
0 |
L |
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Bypass |
- |
- |
-1.0 |
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0.0 |
1.0 |
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dB |
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0 |
VIN |
R |
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Surround Gain |
GVSUR1 |
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f=100Hz |
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VIN |
0 |
L |
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2SP |
MAX |
- |
12.5 |
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14.5 |
16.5 |
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0 |
VIN |
R |
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GVSUR2 |
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f=100Hz |
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VIN |
0 |
L |
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2SP |
MIN |
- |
0.5 |
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2.5 |
4.5 |
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0 |
VIN |
R |
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GVSUR3 |
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f=100Hz |
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VIN |
0 |
L |
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HP |
- |
MAX |
12.5 |
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14.5 |
16.5 |
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0 |
VIN |
R |
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GVSUR4 |
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f=100Hz |
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VIN |
0 |
L |
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HP |
- |
MIN |
0.5 |
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2.5 |
4.5 |
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0 |
VIN |
R |
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dB |
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GVSUR5 |
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f=100Hz |
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VIN |
0 |
L |
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1SP |
MAX |
- |
6.5 |
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8.5 |
10.5 |
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GVSUR6 |
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f=100Hz |
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0 |
VIN |
L |
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1SP |
MAX |
- |
2.0 |
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4.0 |
6.0 |
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GVSUR7 |
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f=100Hz |
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VIN |
0 |
L |
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1SP |
MIN |
- |
-5.5 |
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-3.5 |
-1.5 |
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GVSUR8 |
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f=100Hz |
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0 |
VIN |
L |
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1SP |
MIN |
- |
-12.0 |
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-10.0 |
-8.0 |
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●CONTROL CHARACTERISTICS (V+=3V, Ta=25° C unless otherwise specified) |
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PARAMETER |
SYMBOL |
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TEST CONDITION |
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MIN |
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TYP |
MAX |
UNIT |
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MODE Select |
VMODE |
VIN=High Level |
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1.2 |
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- |
V+ |
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V |
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Control Voltage |
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VIN=Low Level |
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0.0 |
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- |
0.3 |
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■SWITCH FUNCTION |
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SURROUND FUNCTION SW |
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MODE |
SW1 |
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SW2 |
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NOTES |
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Bypass |
L, OPEN |
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L, OPEN |
Input Through |
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2SP mode |
L, OPEN |
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H |
Surround mode for narrow space two speakers |
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HP mode |
H |
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L, OPEN |
Surround mode for Headphone |
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1SP mode |
H |
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H |
Surround mode for monaural speaker (Surround signal from LOUT) |
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STANDBY SW |
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MODE |
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STBY |
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|
NOTES |
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Standby |
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L, open |
IC is non-active |
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Active |
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|
H |
|
IC is active |
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- 4 -
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