Speakerphone Circuit. NJW1128 Datasheet

NJW1128 Circuit. Datasheet pdf. Equivalent

Part NJW1128
Description Voice Switched Speakerphone Circuit
Feature NJW1128 www.DataSheet4U.com Voice Switched Speakerphone Circuit with Speaker Amplifier ! GENERAL DE.
Manufacture NJR Corporation
Datasheet
Download NJW1128 Datasheet




NJW1128
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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 –



NJW1128
NJW1128
www.DataSheet4U.com
! ABSOLUTE MAXIMUM RATING (Ta=25°C)
PARAMETER
SYMBOL
RATING
Power Supply Voltage
V+
7
Power Dissipation
PD
1600(Note1)
Operating Temperature Range
Topr
-40 ~ +85
Storage Temperature Range
Tstg
-40 ~ +125
Maximum Input Voltage
VIMAX
0 ~ V+ (Note2)
(Note1) EIA/JEDEC STANDARD Test board (76.2x114.3x1.6mm, 2layer, FR-4) mounting
UNIT
V
mW
°C
°C
V
! OPERATING VOLTAGE
PARAMETER
Operating Voltage
SYMBOL
TEST CONDITION
V+ -
MIN.
3.9
TYP.
5.0
MAX.
5.5
UNIT
V
! ELECTRICAL CHARACTERISTICS (Ta=25°C,V+=5V,Vin=150mVrms/1kHz,MUT=CD=SPSW= V+,MON=OPEN, RVLC=0)
Power Supply
PARAMETER
SYMBOL
TEST CONDITION
MIN. TYP. MAX. UNIT
Operating Current 1
Operating Current 2
Operating Current 3
Operating Current 4
Operating Current 5
Reference Voltage
ICC1 RX-mode (Receive)
2.0 3.5 6.0
ICC2 TX-mode (Transmit)
2.0 3.5 6.0
ICC3 Idle-mode (Standby)
2.0 3.5 6.0
ICC4 Idle-mode ,CD=PD
1.0 2.5 4.0
ICC5 Idle-mode ,CD=PD,SPSW=PD 0.5 1 1.5
VREF
No signal,Idle-mode
2.2 2.5 2.8
mA
mA
mA
mA
mA
V
Receive Attenuator(RxIN=200Vrms,Receive Amplifier Gv=0dB)
PARAMETER
SYMBOL
TEST CONDITION
Receive Attenuator Gain 1
GR1 RX-mode (Receive)
Receive Attenuator Gain 2
GR2 TX-mode (Transmit)
Receive Attenuator Gain 3
GR3 Idle-mode (Standby)
Range R to T mode
dGR RX-mode – TX-mode
Dynamic DC offset
Volume control range
GRDC
GRVR
RX-mode – TX-mode (DC)
RX-mode,RVLC=0-100k
MIN.
3.0
-42
-17
47
-50
35
TYP.
6.0
-46
-20
52
-
45
MAX.
9.0
-50
-23
57
50
55
UNIT
dB
dB
dB
dB
mV
dB
Transmit Attenuator (TxIN=200Vrms,Mic.amplifier Gv=0dB)
PARAMETER
SYMBOL
TEST CONDITION
Transmit Attenuator Gain 1
Transmit Attenuator Gain 2
Transmit Attenuator Gain 3
Range R to T mode
Dynamic DC offset
GT1
GT2
GT3
dGT
GTDC
TX-mode (Transmit)
RX-mode (Receive)
Idle-mode (Standby)
TX-mode – RX-mode
TX-mode – RX-mode (DC)
MIN.
3.0
-42
-17
47
-50
TYP.
6.0
-46
-20
52
-
MAX.
9.0
-50
-23
57
50
UNIT
dB
dB
dB
dB
mV
–2–







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