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PDF NJW1124 Data sheet ( Hoja de datos )
| Número de pieza | NJW1124 | |
| Descripción | Voice Switched Speakerphone circuit | |
| Fabricantes | NJR Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NJW1124 (archivo pdf) en la parte inferior de esta página. Total 29 Páginas | ||
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NJW1124
Voice Switched Speakerphone circuit
! GENERAL DESCRIPTION
The NJW1124 is a Voice Switched Speakerphone Circuit.
NJW1124 includes all of functions processing a high quality hands–free
speakerphone system, such as the necessary amplifiers ( Microphone ,
Receive ,Line), attenuators, level detectors functions.
All external capacitors are sufficient small so that ceramic capacitors are
applied.
! APPLICATION
•Video Door Phone
•Conference System
•Wireless Application
•Security System
! FEATURES
• Operating voltage range
• Force to Receive, Transmit, or Idle modes
• Mode –watching monitor
• Attenuator gain range between Transmit and Receive
• Microphone amplifier with mute function
• Background noise monitor for each path
• Volume control range
• 4-point signal sensing
• Microphone and Receive Amplifiers pinned out for flexibility
• Package Outline
2.9 to 4.5V
52dB
40dB
SSOP32
! PACKAGE OUTLINE
NJW1124V
! BLOCK DIAGRAM
Microphone
C6 R2
100n 5.1k
R3 C7
51k 100n
MCI MCO
R4
51k
TLI2
C8 C9 R6
100n 100n 5.1k
R5
10k
TLI1
TXO
LII
R7
51k
C10
LiO-
LiO+
Line Out
V+
V+ R1
300k
C1
1µ
C3
470n
C4
470n
C2
1u
M UT
TLO2
RLO2
CPT
C23
1µ VREF
VREF2
VREF
Mic
Amplifier
Tx Attenuator
Lev el
Detector
Background
NoiseMonitor
Attenuator
Control
VREF
-1
Line Amplifier
Background
NoiseMonitor
Lev el
Detector
C11
V+ 1µ
M onit or
CT
RTSW
C5
1µ
V+
CPR
C22
1µ
TLO1
RLO1
C20
470n
C21
470n
BIAS
IC1
NJW1124
Rx Attenuator
1.2µ A
Receive
Amplifier
GND
VREF
V+ R10
15k
C15
1µ
Speaker
IC2
NJU7084
Power Amplifier
5.0V
+ C16
10µ C13
1µ
RXO RLI2
C17
100n
R11
10k
C14 1 µ
R9
22k
R8 C12
11k 100n
VLC
R12
51k
RVLC
RLI1 FO
C18
100n
R13
5. 1k
FI
R14 C19
5.1k 100n
Recive In
–1–
1 page  
NJW1124
! CONTROL CHARACTERISTICS (MUT)
PARAMETER
SYMBOL
Low Level Input Voltage
High Level Input Voltage
VIL1
VIH1
! CONTROL CHARACTERISTICS (RTSW)
PARAMETER
SYMBOL
Low Level Input Voltage
High Level Input Voltage
VIL2
VIH2
TEST CONDITION
-
-
TEST CONDITION
-
-
MIN.
-
1.5
TYP.
-
-
MAX.
0.3
-
UNIT
V
V
MIN.
-
V+-0.3
TYP.
-
-
MAX.
0.3
-
UNIT
V
V
! FUNCTION
●MUT (2pin)
INPUT VOLTAGE
VIH
VIL
●RTSW (31pin)
INPUT VOLTAGE
VIH
OPEN
VIL
●RVLC (26pin)
IMPEDANCE
0
100kΩ
STATUS
MUTE
ACTIVE
OPERATION
The microphone input is made a mute.
The microphone input is active.
STATUS
Receive
AUTO
Transmit
OPERATION
Force to Receive mode.
Receive mode and Transmit mode are automatically
switched.
Force to Transmit mode.
STATUS
VolMAM
VolMIN
OPERATION
The Receive attenuator Volume is maximum.
The Receive attenuator Volume is minimum.
–5–
5 Page 
NJW1124
! TYPICAL CHARACTERISTICS
Receive AMP THD+N vs Input Voltage
(V+=3.3V, RL=5.1kΩ , Gain=0dB , Rf=3kΩ, Ri=3kΩ, BW:400Hz-30kHz)
10
1
0.1
0.01
0.01
85℃
0.1
Input Voltage [Vrms]
-40℃
25℃
1
Mic AMP THD+N vs Input Voltage
(V+=3.3V,MUT=0.3V, RL=5.1kΩ , Gain=40dB , Rf=300kΩ, Ri=3kΩ, BW:400Hz-30kHz)
10
10
Receive AMP THD+N vs Input Voltage
(V+=4.0V, RL=5.1kΩ , Gain=0dB , Rf=3kΩ, Ri=3kΩ, BW:400Hz-30kHz)
10
1
0.1
-40℃
0.01 85℃
25℃
0.001
0.01
0.1 1
Input Voltage [Vrms]
Mic AMP THD+N vs Input Voltage
(V+=4.0V,MUT=0.3V, RL=5.1kΩ , Gain=40dB , Rf=300kΩ, Ri=3kΩ, BW:400Hz-30kHz)
10
10
85℃
1 (MUT=0.3V)
85℃
(MUT=0V)
25℃
-40℃
0.1
0.0001
0.001
0.01
Input Voltage [Vrms]
Mic AMP THD+N vs Input Voltage
(V+=3.3V,MUT=0.3V, RL=5.1kΩ , Gain=40dB , Rf=300kΩ, Ri=3kΩ, BW:400Hz-30kHz)
10
0.1
1
0.1
0.01
0.01
85℃
85℃ (MUT=0.3V)
(MUT=0V)
0.1
Input Voltage [Vrms]
25℃
-40℃
1
10
85℃
1 (MUT=0.3V)
85℃
(MUT=0V)
25℃
-40℃
0.1
0.0001
0.001
0.01
Input Voltage [Vrms]
Mic AMP THD+N vs Input Voltage
(V+=4.0V,MUT=0.3V, RL=5.1kΩ , Gain=40dB , Rf=300kΩ, Ri=3kΩ, BW:400Hz-30kHz)
10
0.1
1
85℃
0.1 (MUT=0.3V)
85℃
(MUT=0V)
-40℃
25℃
0.01
0.001
0.01
0.1 1
Input Voltage [Vrms]
10
– 11 –
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet NJW1124.PDF ] | |
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