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PDF NJW1128 Data sheet ( Hoja de datos )
| Número de pieza | NJW1128 | |
| Descripción | Voice Switched Speakerphone Circuit | |
| Fabricantes | NJR Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NJW1128 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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www.DataSheet4U.com
NJW1128
Voice Switched Speakerphone Circuit
with Speaker Amplifier
! GENERAL DESCRIPTION
! PACKAGE OUTLINE
The NJW1128 is a Voice Switched Speakerphone Circuit. It includes all of functions
processing a high quality hands–free speakerphone system, such as the necessary
amplifiers ( Mic , Receive ,Line, Speaker ), attenuators, level detectors functions.
The NJW1128 is controllable independently power-down of the speaker amplifier and
the entire IC excluding the speaker amplifier.
All external capacitors are sufficient small so that ceramic capacitors are applied.
! APPLICATION
•Video Door Phone
•Conference System
•Wireless Application
•Security System
NJW1128FR3
! FEATURES
q Operating voltage range
q Attenuator gain range between Transmit and Receive
q Speaker amplifier
q Microphone amplifier with mute function
q Force to Receive, Transmit, or Idle modes
q Mode –watching monitor
q Background noise monitor for each path
q 4-point signal sensing
q Chip disable Pin powers down the entire IC excluding
the speaker amplifier
q Speaker switch Pin power down the speaker amplifier
q Microphone and Receive Amplifiers pinned out for flexibility
q Package Outline
3.9 to 5.5V
52dB
LQFP48-R3
! BLOCK DIAGRAM
C8 R4
100n 3k
M ic rophone
M ICIN
R5
300 k
C9
10 0n
R6
5.1k
MICOUT TLI2
C1 0 C11 R 8
100n 100n 5 .1k
R9
51k
R7
5 .1k
TLI1 TXO
Cf L
L II LiO-
L iO+
MUT
V+ :MU TE
GND :AC TIVE
V+ R2
3 00k
C2
1µ
C5
1 00n
C6
100n
C4
1u
M UT
TL O2
RL O2
CPT
VR EF
M ic
Am plifier
Tx Atten uato r
Level
D et ect or
B a ckground
Noi seMon itor
At t enuat or
Control
VR EF
-1
L ine Am plifi er
Backgrou nd
No iseM onitor
Line Out
SPV+
SPV+
V+
V+
C 22
1µ
C 12
1µ
Monit or
C7
C T 1µ
V+
RTSW
C PR
C21
1µ
V+ :Reciv e
GND :Trensm it
Open :idle
CD
V+ :AC TIVE
GND :Power Down
C20
1µ
C1
VREF
1µ CD
R3
V+ C3 300 k
1µ SPS
SPSW
V+ :ACTIVE
GN D :Powe r Down
V+
R3
300 k
B IAS
L evel
Detector
Speaker Ampl ifier
-1
V RE F
Rx Attenuator
1.2µA
Receiv e
Am pli fier
SPO+
S PO -
CfS
R10
51 k
SPI RXO RL I2
R11 C 13 C1 4
5.1k 10 0n 100n
R 12
5.1k
VL C
R 13
5.1k
RVL C
R LI1
C15
100n
FO
R14
5.1k
CfR
T LO1
RLO1
C20
100 n
C 19
100 n
SPGN D
GND
V RE F
FI
R 15
5. 1k
C 16
100n
Recive In
Spea ke r
Ver.1.2 – 1 –
1 page  
www.DataSheet4U.com
! APPLICATION CIRCUIT
NJW1128
H:Active
L: PowerDown
H:MUTE
L:ACTIVE
H:ACTIVE
L:PowerDown
C7
220n
SW 1
V+
C2
1u
R1
300k
SW2
V+
C3
1u
R2
300k
SW3
V+
C4
1u
R3
300k
C6
220n
C5
1u
48 47 46 45 44
TLO2 CPT SPSW MUT CD
1 RLO2
Rx-Mode :H
Tx-Mode :L
Idle :HI-Z
M ON
V+
R24 LED1
TR1 2.2k
C30
R23
51k
1u
H:Recive
L:Trensmit
O:Auto
V+ Open V+
C29 C28
C1
1u
SW 4
1u 1u
C27
220n
43 42
GND V+
41 40 39 38 37
MON RTSW VREF CPR RLO1
TLO1 36
C26
220n
V+
R4
C9
+
R5
MIC IN
MIC OUT
C11
C10 R6
100n 5.1k
R8
51k
*R7 : Jumper
C8
1u
R7
0
C13
100n
C12
100p
R9
5.1k
TX OUT
LINE IN
Line Out－
Line Out＋
*R11 : Jumper
R10
510
C14
1u
R11 C15 R12
0 100n 5.1k
R13
5.1k
C16
1n
*R14
*R14 : Dummy Load
2
3
4
5
6
7
8
9
10
11
12
NC
CT
NC
M CI
MCO NJW1128
TLI2
TLI1
TXO
LII
LIO-
LIO+
NC
V+
V+ SPO+ SPO+ GND GND SPO- SPO- V+ V+
13 14 15 16 17 18 19 20 21 22 23
NC 35
VLC 34
NC 33
3
FI 32
C23
100p
FO 31
R19
5.1k
RLI1 30
R18
510
RLI2 29
RXO 28
SPI 27
NC 26
R15
5.1k
VR1
100k
1
C24
2
R21
0
C22
100n
R20
51k
*R21 : Jumper
R22 C25
5.1k 100n
Receive
In
FO
C21
1u
*R17 : Jumper
R16 C20
5.1k 100n
* R 17
0
C19
1n
RX
OUT
SP IN
NC 25
NC
24
C17 +
10u
+ C18
10u
V+
SP Out+
SP Out－
–5–
5 Page 
www.DataSheet4U.com
! TYPICAL CHARACTERISTICS
Pd vs Output Power
V+=5.0V , f=1kHz , Gv=6dB , BW=400Hz-30kHz , Ta=25degC
700
600
THD=1%
500 THD=3%
400
300
200
100
0
0
8Ω
16Ω
32Ω
100 200 300 400 500 600 700
Output Power [mW]
2
0
-2
-4
-6
-8
-10
10
2
0
-2
-4
-6
-8
-10
10
RecieveAmp Voltage Gain vs Frequency
Vin = 100mVrms , Rf = 3kΩ , Ri = 3kΩ , Ci = 1µF , Gv=0dB , RL=5.1kΩ
V+ =3.9V to 5.5V
Ta = -40degC to +85degC
100
1000
10000
Frequency [Hz]
Mic Amp Voltage Gain vs Frequency
Vin = 100mVrms , Rf = 3kΩ , Ri = 3kΩ , Ci = 1µF , Gv=0dB , RL=5.1kΩ
100000
V+ =3.9V to 5.5V
Ta = -40degC to +85degC
100
1000
10000
Frequency [Hz]
100000
NJW1128
45
40
35
30
25
20
15
10
10
45
40
35
30
25
20
15
10
10
RecieveAmp Voltage Gain vs Frequency
Vin = 1mVrms , Rf = 300kΩ , Ri = 3kΩ , Ci = 1µF , Gv=40dB , RL=5.1kΩ
V+ =3.9V to 5.5V
Ta = -40degC to +85degC
100
1000
10000
Frequency [Hz]
Mic Amp Voltage Gain vs Frequency
Vin = 1mVrms , Rf = 300kΩ , Ri = 3kΩ , Ci = 1µF , Gv=40dB , RL=5.1kΩ
V+ =3.9V to 5.5V
Ta = -40degC to +85degC
100
1000
10000
Frequency [Hz]
100000
100000
– 11 –
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet NJW1128.PDF ] | |
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