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NJW1128
Voice Switched Speakerphone Circuit with Speaker Amplifier
! GENERAL DESCRIPTION
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.
! PACKAGE OUTLINE
NJW1128FR3
! APPLICATION
*Video Door Phone *Conference System *Wireless Application *Security System
! FEATURES
q q q q q q q q q Operating voltage range Attenuator gain range between Transmit and Receive Speaker amplifier Microphone amplifier with mute function Force to Receive, Transmit, or Idle modes Mode -watching monitor Background noise monitor for each path 4-point signal sensing 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
C8 R4 100n 3k R5 300 k C9 10 0n R6 5.1k R7 5 .1k C1 0 100n C11 R 8 100n 5 .1k
3.9 to 5.5V 52dB
LQFP48-R3
R9 51k
! BLOCK DIAGRAM
Microphone
Cf L TXO L II LiOL iO+ SPV + SPV + V+ V+
L ine Am plifi er
Line Out
M ICIN
MUT V+ GND
MICOUT TLI2
TLI1
:MU TE :A TIVE C C2 1 C5 100n C6 100n C4 1u C20 1 C1 1
V+
R2 3 00k
VREF M ic Am plifier
C 22 1 C 12 1
Tx Atten uato r VREF
-1
M UT TLO2 RLO2
Level Detector
Monit or CT
V
+
C7 1
V+ :Reciv e GND :Trensm it Open :idle
RTSW
Background Noi seMon itor Attenuator Control Backgrou nd No iseM onitor
CPT
VREF CD
C PR
C21 1 C20 100 n C 19 100 n
BIAS
L evel Detector
TLO1 RLO1
CD V+ :A TIVE C GND :Power Down
V+
Speaker Ampl ifier
R3 C3 300 k 1
Receiv e Am pli fier
SPGND
SPS
-1
V RE F
Rx Attenuator GND 1.2A V RE F
SPSW V+ :A CTIVE GN D :Powe r Down
V
+
R3 300 k
SPO+
SPOCfS R10 51 k
SPI
RXO RL I2
R 12 5.1k
VL C
R 13 5.1k
RLI1 C15 100n
FO R14 5.1k CfR
FI R15 5. 1k C16 100n Recive In
R11 C 13 C1 4 5.1k 10 0n 100n
RVL C
Speaker
Ver.1.4
-1-
NJW1128
! ABSOLUTE MAXIMUM RATING (Ta=25C) PARAMETER SYMBOL
Power Supply Voltage Power Dissipation Operating Temperature Range Storage Temperature Range Maximum Input Voltage V+ PD Topr Tstg VIMAX
RATING
7 1,330(Note1) -40 ~ +85 -40 ~ +125 0~V
+
UNIT
V mW C C V
(Note2)
(Note1) EIA/JEDEC STANDARD Test board (76.2x114.3x1.6mm, 2layer, FR-4) mounting
! OPERATING VOLTAGE PARAMETER Operating Voltage
SYMBOL
V
+
TEST CONDITION
-
MIN.
3.9
TYP.
5.0
MAX.
5.5
UNIT
V
! ELECTRICAL CHARACTERISTICS (Ta=25C,V+=5V,Vin=150mVrms/1kHz,MUT=CD=SPSW= V+,MON=OPEN, RVLC=0) Power Supply PARAMETER Operating Current 1 Operating Current 2 Operating Current 3 Operating Current 4 Operating Current 5 Reference Voltage SYMBOL
ICC1 ICC2 ICC3 ICC4 ICC5 VREF
TEST CONDITION
RX-mode (Receive) TX-mode (Transmit) Idle-mode (Standby) Idle-mode ,SPSW=PD Idle-mode ,CD=PD,SPSW=PD No signal,Idle-mode
MIN.
2.0 2.0 2.0 1.0 0.5 2.2
TYP.
3.5 3.5 3.5 2.5 1 2.5
MAX.
6.0 6.0 6.0 4.0 1.5 2.8
UNIT
mA mA mA mA mA V
Receive Attenuator(RxIN=200Vrms,Receive Amplifier Gv=0dB) PARAMETER Receive Attenuator Gain 1 Receive Attenuator Gain 2 Receive Attenuator Gain 3 Range R to T mode Dynamic DC offset Volume control range SYMBOL
GR1 GR2 GR3 dGR GRDC GRVR
TEST CONDITION
RX-mode (Receive) TX-mode (Transmit) Idle-mode (Standby) RX-mode - TX-mode 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 Transmit Attenuator Gain 1 Transmit Attenuator Gain 2 Transmit Attenuator Gain 3 Range R to T mode Dynamic DC offset SYMBOL
GT1 GT2 GT3 dGT GTDC
TEST CONDITION
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-
NJW1128
MIC Amplifier(TxIN=1mVrms,Gv=40dB,RL=5.1k) PARAMETER
Output Offset Voltage Input Bias Current Voltage Gain 1 Voltage Gain 2 Maximum Output Voltage Maximum Attenuation
SYMBOL
VMOS IMBIAS GVM1 GVM2 VMMAX GMMUTE
TEST CONDITION
RF=300k
MIN.
-50 -
TYP.
0.0 30 40 36 -73
MAX.
50 -
UNIT
mV nA dB dB Vrms dB
f=1kHz f=20kHz THD=1% MUT=MUTE
1.0 -70
Receive Amplifier (RxIN=1mVrms,Gv=40dB,RL=5.1k) PARAMETER
Output Offset Voltage Input Bias Current Voltage Gain 1 Voltage Gain 2 Maximum Output Voltage
SYMBOL
VROS IRBIAS GVR1 GVR2 VRMAX
TEST CONDITION
RF=300k
MIN.
-50 -
TYP.
0.0 30 40 36 -
MAX.
50 -
UNIT
mV nA dB dB Vrms
f=1kHz f=20kHz THD=1%
1.0
Line Amplifier (LINEIN=50mVrms, GV=26dB,RL=1.2k) PARAMETER SYMBOL TEST CONDITION
Output Offset Voltage Input Bias Current Voltage Gain 1 Voltage Gain 2 Gain Bandwidth Closed Loop Gain Maximum Output Voltage Total Harmonic Distortion VLOS IRBIAS GvL1 GvL2 GLBW GLC VLMAX THDLN f=1kHz f=20kHz RL=600,LIO RL=1.2k,LIO- to LIO+ RL=1.2k,THD=1% VIN=100mVrms,GV=20dB RL=1.2 RF=51k
MIN.
-50 -0.5 2.0 -
TYP.
0.0 30 26 25 1.5 0 -
MAX.
50 0.5 0.5
UNIT
mV nA nA nA MHz dB Vrms %
Speaker Amplifier (SPIN=50mVrms, GV=26dB,RL=32) PARAMETER SYMBOL TEST CONDITION
Output Offset Voltage Voltage Gain 1 Voltage Gain 2 Voltage Gain 3 Voltage Gain 4 Closed Loop Gain Maximum Output Power VSPOS GVSP1 GVSP2 GVSP3 GVSO4 GLC PoMAX1 PoMAX2 THDSP1 Total Harmonic Distortion THDSP2 RF=51k f=1kHz f=20kHz f=1kHz, GVSP=6dB,RL=8 f=20kHz, GVSP=6dB,RL=8 SPO- to SPO+ RL=32,THD=3% RL=8,THD=3% VIN=500mVrms,f=1KHz, RL=32,GVD=26dB VIN=500mVrms,f=1KHz, RL=8,GVD=6dB
MIN.
-50 -0.6 200 300
TYP.
0.0 26 24 6 4 0 300 500 -
MAX.
50 0.6 1.0 1.0
UNIT
mV dB dB dB dB dB mW mW % %
-
-
-3-
NJW1128
MONITOR TERMINAL (32Pin) PARAMETER
RX-mode TX-mode Idle-mode Maximum Output Current
SYMBOL
Rx Tx Idle IMON -
TEST CONDITION
MIN.
V -0.6 GND 2.4 +
TYP.
2.5 0.9
MAX.
V
+
UNIT
V V V mA
0.6 2.6 -
No Signal Rx-mode / Tx-mode
! CONTROL CHARACTERISTICS (MUT) PARAMETER Low Level Input Voltage High Level Input Voltage SYMBOL VIL1 VIH1 TEST CONDITION MIN. 1.5 TYP. MAX. 0.3 UNIT V V
! CONTROL CHARACTERISTICS (RTSW) PARAMETER Low Level Input Voltage High Level Input Voltage ! FUNCTION CD INPUT VOLTAGE VIH VIL MUT INPUT VOLTAGE VIH VIL SPSW INPUT VOLTAGE VIH VIL RTSW INPUT VOLTAGE VIH OPEN VIL RVLC (26pin) IMPEDANCE 0 100k STATUS VolMAM VolMIN OPERATION The Receive attenuator Volume is maximum. The Receive attenuator Volume is minimum. STATUS Receive AUTO Transmit Force to Receive mode. Receive mode and Transmit mode are automatically switched. Force to Transmit mode. OPERATION STATUS ACTIVE PD OPERATION The Speaker Amplifier is Active. The Speaker Amplifier is Stand-by. STATUS MUTE ACTIVE OPERATION The microphone input is mute. The microphone input is active. STATUS ACTIVE MUTE NJW1128 is active. NJW1128 is stand-by except Speaker Amplifier. OPERATION SYMBOL VIL2 VIH2 TEST CONDITION +
MIN. V -0.3
TYP. -
MAX. 0.3 -
UNIT V V
-4-
NJW1128
! APPLICATION CIRCUIT
C2 1u H:Active L: PowerDown SW1
V+
Rx-Mode :H Tx-Mode :L Idle :HI-Z R24 2.2k
R1 300k C3 1u
LED1
TR1
MON
V+ R23 51k H:Recive L:Trensmit O:Auto
Open
H:MUTE L:ACTIVE
SW2
V+
R2 300k C4 1u
C30 1u
H:ACTIVE L:PowerDown SW3
V+
R3 300k
V+
V+
C6 220n
C5 1u
C1 1u
SW4
C29 1u
C28 1u
C27 220n
48
C7 220n
47
CPT
46
SPSW
45
MUT
44
CD
43
GND
42
V+
41
MON
40
RTSW
39
VREF
38
CPR
37
RLO1 TLO1
C26 220n
TLO2
1 2
V+ R4 C9
+
RLO2
36 35 34 33 32
C23 100p R20 51k FO R19 5.1k C22 100n
NC
NC
C8 1u
VR1 100k
3
C11 C10 R6 100n 5.1k R8 51k R7 0
CT
VLC
3
1 C24 2 R21 0 R22 5.1k C25 100n Receive In
R5
4 5
C12 100p
NC
NC
*R21 : Jumper
MIC IN
MCI
FI
MIC OUT
6
*R7 : Jumper
C13 100n R9 5.1k
MCO
7
R10 510
TLI2
NJW1128
V+ V+ SPO+ SPO+ GND GND SPOSPOV+ V+ NC
FO
31 30
R18 510
RLI1
8
*R11 : Jumper
TX OUT R11 0 LINE IN R13 5.1k Line Out *R14 Line Out C16 1n C15 R12 100n 5.1k C14 1u
TLI1
RLI2
29
C21 1u
*R17 : Jumper
R16 C20 5.1k 100n *R17 0 RX OUT
9 10 11 12
*R14 : Dummy Load
TXO
RXO
28 27 26 25
R15 5.1k C19 1n
LII
SPI
SP IN
LIO-
NC
LIO+ NC
NC
13
C17 10u
14
+
15
16
17
18
19
20
21
22
23
+ C18
24
10u
V+ SP Out+ SP Out
-5-
NJW1128
! TYPICAL CHARACTERISTICS
Supply Current vs Supply Voltage No Signal , Supply Current 1 6
4.0 Supply Current vs Supply Voltage No Signal , Supply Current 4
3.5
5
+85degC +25degC
3.0
+85degC
4 -40degC 3
Supply Current [mA]
+25degC 2.5 -40degC
Supply Current [mA]
2.0
1.5
2
1.0
1
0.5
0 0 1 2 3 4 Supply Voltage [V] 5 6 7 8
0.0 0 1 2 3 4 Supply Voltage [V] 5 6 7 8
Supply Current vs Supply Voltage No Signal , Supply Current 5 2.0 1.8 1.6 1.4 Supply Current [mA]
Supply Current [mA] 5 Supply Current 1 4.5 4 3.5 Supply Current 4 Supply Current 5
Supply Current vs Temperature V+ =5.0V , No Signal
+85degC 1.2 +25degC 1.0 -40degC 0.8 0.6 0.4 0.2 0.0 0 1 2 3 4 Supply Voltage [V] 5 6 7 8
3 2.5 2 1.5 1 0.5 0 -50
-30
-10
10
30
50
70
90
110
130
150
Temperature [degC]
RxAtt Gain vs Temperature V+ =5.0V , RecieveAmp : 0dB , RL=5.1k 10 5 0 -5 -10 -15 Gain [dB] -20 -25 -30 -35 -40 -45 -50 -50 34 32 30 -50 Idle-Mode RX-Mode Tx-Mode 44 Volume Control Range [dB] 42 40 38 36 46 50 48
RxAtt Gain vs Temperature V+ =5.0V , Rx-Mode , RecieveAmp : 0dB , RL=5.1k
-30
-10
10
30
50
70
90
110
130
150
-30
-10
10
30
50
70
90
110
130
150
Temperature [degC]
Temperature [degC]
-6-
NJW1128
! TYPICAL CHARACTERISTICS
TxAtt Gain vs Temperature V+ = 5.0V , MicAmp : 0dB , RL=5.1k 10 5 0 -5 -10 -15 Gain [dB] -20 -25 -30 -35 -40
1.1 1.7 RecieveAmp Maximum Output Voltage vs Temperature V+ = 5.0V , f = 1kHz Rf = 300k , Gv=40dB , RL=5.1k , THD+N = 1% , BW=400Hz-30kHz
Idle-Mode TX-Mode RX-Mode
Maximum Output Voltage [Vrms]
1.6
1.5
1.4
1.3
1.2
-45 -50 -50 -30 -10 10 30 50 70 90 110 130 150 Temperature [degC]
1 -50
-30
-10
10
30
50
70
90
110
130
150
Temperature [degC]
MicAmp Maximum Output Voltage vs Temperature V+ =5.0V , f = 1kHz , Rf = 300k , Gv=40dB , RL=5.1k , THD+N = 1% , BW=400Hz-30kHz 1.7
80 79
MicAmp Mute Range vs Temperature V+ =5.0V , Rf = 300k , Gv=40dB , RL=5.1k , A-Weighting
1.6
78
Maximum Output Voltage [Vrms]
1.5
77 76
1.4
75
1.3
74 73 72
1.2
1.1
71 70 -50
1 -50
-30
-10
10
30
50
70
90
110
130
150
-30
-10
10
30
50
70
90
110
130
150
Temperature [degC]
LineAmp THD vs Temperature V+ =5.0V , f = 1kHz , Rf = 51k , Gv=26dB , Vin = 50mVrms , RL=1.2k , BW=400Hz-30kHz 0.3
LineAmp Maximum Output Voltage vs Temperature V+ =5.0V , f = 1kHz , Rf = 51k , Gv=26dB , RL=1.2k , THD+N = 1% , BW=400Hz-30kHz 2.8
0.25
2.7
2.6
0.2 THD+N [%]
Maximum Output Voltage [Vrms]
2.5
0.15
2.4
0.1
2.3
2.2
0.05
2.1
0 -50
-30
-10
10
30
50
70
90
110
130
150
Temperature [degC]
2 -50
-30
-10
10
30
50
70
90
110
130
150
Temperature [degC]
-7-
NJW1128
! TYPICAL CHARACTERISTICS
Speaker Amp THD vs Temperature V+ =5.0V , f = 1kHz , BW=400Hz-30kHz 0.7
800 Speaker Amp Maximum Output Pow er vs Temperature V+ =5.0V , f = 1kHz , THD+N = 3% , BW=400Hz-30kHz
0.6 32 / 26dB 0.5
Maximum Ouput Power [mW]
700 8 / 6dB 600
500
THD+N [%]
0.4
400
32 / 26dB
0.3
8 / 6dB
300
0.2
200
0.1
100
0 -50
-30
-10
10
30
50
70
90
110
130
150
0 -50
-30
-10
10
30
50
70
90
110
130
150
Temperature [degC]
Temperature [degC]
Receive Amp THD+N vs Input Voltage V+ = 5.0V , f = 1kHz Rf = 3k , Ri=3k , Ci = 1F , Gv=0dB , RL=5.1k , BW=400Hz-30kHz 10 -40degC +25degC +85degC 1 10
Receive Amp THD+N vs Input Voltage V+ = 5.0V , f = 1kHz Rf = 300k , Ri=3k , Ci = 1F , Gv=40dB , RL=5.1k , BW=400Hz-30kHz -40degC +25degC +85degC
THD+N [%]
THD+N [%]
0.1
1
0.01
0.001 0.01
0.1 Input Voltage [%]
1
10
0.1 0.0001
0.001 Input Voltage [Vrms]
0.01
0.1
10
Mic Amp THD+N vs Input Voltage f = 1kHz Rf = 3kohm , Ri=3kohm , Ci = 1uF , Gv=0dB , RL=5.1kohm ,BW=400Hz-30kHz Ta = -40degC -40degC +25degC +85degC
Mic Amp THD+N vs Input Voltage V+ = 5.0V , f = 1kHz Rf = 300k , Ri=3k , Ci = 1F , Gv=40dB , RL=5.1k , BW=400Hz-30kHz 10 -40degC +25degC +85degC
1
THD+N [%]
0.1
THD+N [%] 0.1 THD+N [Vrms] 1 10
1
0.01
0.001 0.01
0.1 0.0001
0.001 Input Voltage [Vrms]
0.01
0.1
-8-
NJW1128
! TYPICAL CHARACTERISTICS
Line Amp THD+N vs Input Voltage f = 1kHz Rf = 51kohm , Ri=5.1kohm , Ci = 1uF , Gv=26dB , RL=1.2kohm ,BW=400Hz-30kHz Ta = -40degC -40degC +25degC +85degC
10
THD+N [%]
1
0.1 0.001
0.01 Input Voltage [Vrms]
0.1
1
Speaker Amp THD+N vs Output Pow er V+ = 5.0V , f = 1kHz Rf = 51k , Ri=5.1k , Ci = 1F , Gv=26dB , RL=32 ,BW=400Hz-30kHz 10 -40 degC +25 degC +85 degC 10
Speaker Amp THD+N vs Output Pow er V+ = 5.0V , f = 1kHz Rf = 5.1k , Ri=5.1k , Ci = 1F , Gv=26dB , RL=8 ,BW=400Hz-30kHz
-40degC +25degC +85degC
THD+N [%]
1
THD+N [%] 0.01 Output Pow er [Wrms] 0.1 1
1
0.1 0.001
0.1 0.001
0.01 Output Pow er [Wrms]
0.1
1
Receive Amp Maximum Output Voltage vs Load Impedance V+ = 5.0V ,Rf = 300k , Ta=25degC 6 6
Mic Amp Maximum Output Voltage vs Load Impedance V+ = 5.0V ,Rf = 300k , Ta=25degC
5 Maximum Output Voltage [V] Maximum Output Voltage [V] 1000 Load Impedance [ ] 10000 100000
5
4
4
3
3
2
2
1
1
0 100
0 100
1000 Load Impedance [ ]
10000
100000
-9-
NJW1128
! TYPICAL CHARACTERISTICS
Rx Att Maximum Output Voltage vs Load Impedance V+=5.0V , Ta=25degC 6 6 Tx Att Maximum Output Voltage vs Load Impedance V+=5.0V , Ta=25degC
5 Maximum Output Voltage [V] Maximum Output Voltage [V] 1000 Load Impedance [ ] 10000 100000
5
4
4
3
3
2
2
1
1
0 100
0 100
1000 Load Impedance [ ]
10000
100000
Line Amp Maximum Output Voltage vs Load Impedance V+ = 5.0V ,Rf = 51k , Ta=25degC 6 6
Monitor out Maximum Output Voltage vs Load Impedance V+=5.0V , Ta=25degC
Maximum Output Voltage (LIO+ to LIO-) [V]
5 Maximum Output Voltage [V] 1000 Load Impedance [ ] 10000 100000
5
4
4
3
3
2
2
1
1
0 100
0 100
1000 Load Impedance [ ]
10000
100000
- 10 -
NJW1128
! TYPICAL CHARACTERISTICS
Pd vs Output Power V+=5.0V , f=1kHz , Gv=6dB , BW=400Hz-30kHz , Ta=25degC 700
600
500
THD=1% THD=3%
Pd [mW]
400
300
200 8 16 0 0 100 200 300 400 500 600 Output Power [mW] 32 700
100
RecieveAmp Voltage Gain vs Frequency Vin = 100mVrms , Rf = 3k , Ri = 3k , Ci = 1F , Gv=0dB , RL=5.1k 2 45
RecieveAmp Voltage Gain vs Frequency Vin = 1mVrms , Rf = 300k , Ri = 3k , Ci = 1F , Gv=40dB , RL=5.1k
0
40
35 -2
Gain [dB]
-4
Gain [dB]
V+ =3.9V to 5.5V Ta = -40degC to +85degC
30
V+ =3.9V to 5.5V Ta = -40degC to +85degC
25
-6 20
-8
15
-10 10 100 1000 Frequency [Hz] 10000 100000
10 10 100 1000 Frequency [Hz] 10000 100000
Mic Amp Voltage Gain vs Frequency Vin = 100mVrms , Rf = 3k , Ri = 3k , Ci = 1F , Gv=0dB , RL=5.1k 2 45
Mic Amp Voltage Gain vs Frequency Vin = 1mVrms , Rf = 300k , Ri = 3k , Ci = 1F , Gv=40dB , RL=5.1k
0
40
35 -2
Gain [dB]
-4
Gain [dB]
V+ =3.9V to 5.5V Ta = -40degC to +85degC
30
V+ =3.9V to 5.5V Ta = -40degC to +85degC
25
-6 20
-8
15
-10 10 100 1000 Frequency [Hz] 10000 100000
10 10 100 1000 Frequency [Hz] 10000 100000
- 11 -
NJW1128
! TYPICAL CHARACTERISTICS
Line Amp Voltage Gain vs Frequency Vin = 50mVrms , Rf = 51k , Ri = 5.1k , Ci = 1F , Gv=26dB , RL=1.2k 28
26
24
22 Gain [dB]
V+ =3.9V to 5.5V Ta = -40degC to +85degC
20
18
16
14
12 10 100 1000 Frequency [Hz] 10000 100000
Speaker Amp Voltage Gain vs Frequency Vin = 50mVrms , Rf = 51k , Ri = 5.1k , Ci = 1F , Gv=26dB , RL=32 28 10 8 6 24 4 22 Voltage Gain [dB]
Speaker Amp Voltage Gain vs Frequency Vin = 500mVrms , Rf = 5.1k , Ri = 5.1k , Ci = 1F , Gv=6dB , RL=8
26
V+ =3.7V , 5,0V , 5.5V Ta = -40 , +25 , +85 degC
Gain [dB]
2 0 -2 -4
20
V+ =3.9V to 5.5V Ta = -40degC to +85degC
18
16 -6 14 -8 -10 10 100 1000 Frequency [Hz] 10000 100000 10 100 1000 Frequency [Hz] 10000 100000
12
Supply Current vs CD Pin Voltage V+ = 5.0V , SPSW = PD , RTSW = Open , no Signal 3.5
Supply Current vs SPSW Pin Voltage V+ = 5.0V , CD = Active , RTSW = Open , no Signal 5 4.5
3
+85 degC +25 degC
+85 degC +25 degC
4 3.5 Supply Current [mA] 3 2.5 2 1.5 1
2.5
Supply Current [mA]
2
-40 degC
-40 degC
1.5
1
0.5
0.5
0 0 0.5 1 1.5 CD Pin Voltage [V] 2 2.5
0 0 0.5 1 1.5 2 2.5 SPSW Pin Voltage [Hz]
- 12 -
NJW1128
! TYPICAL CHARACTERISTICS
Mic Amp Mute attenuate Range vs MUT Pin Voltage V+ = 5.0V , Vin = 1mVrms , Rf = 300kohm , Ri = 3kohm , Ci = 1uF , Gv=40dB , RL=5.1kohm A-Weighting
TX , RX attenuator Gain vs RTSW Pin Voltage V+ = 5.0V , f = 1kHz , Vin = 200mVrms 20
10
TX-Mode
Auto(Idle)-Mode
RX-Mode
0
+25 degC +85 degC -40 degC
10
-10
-40degC
0
+25degC +85degC
-20 Supply Current [mA]
Gain [dB]
-30
-10
TX Att.
-20
RX Att.
-40
-50
RX Att.
-30
TX Att.
-60
-40degC +25degC
-40
-70
+85degC
-50 0 0.5 1 1.5 2 2.5 RTSW Voltage [V] 3 3.5 4 4.5 5
-80 0 0.5 1 1.5 MUT Pin Voltage [V] 2 2.5
[CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.
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