NJW1184
-1-
4-CHANNEL ELECTRONIC VOLUME
GENERAL DESCRIPTION
PACKAGE OUTLINE
The NJW1184 is a four channel electronic volume.
The NJW1184 performs click-noiseless characteristics
with VCA circuit.
These functions are controlled by I
2
C Bus. And the
Slave Address selector is available for using two chips
on same serial bus line. It’s available for two-channel
stereo and or multi-channel audio volume.
FEATURES
Operating Voltage 7.5 to 13V
I
2
C Bus control
Slave Address Selector available for using two chips on same serial bus line
Volume (VCA type) 0 to –100dB/0.5dBstep, MUTE
2 Auxiliary Port
Bi-CMOS Technology
Package Outline DMP20
BLOCK DIAGRAM
Bias
VOL3
OUT3
OUT4
CVOL1
CVOL2
CVOL3
CVOL4
GND
V+
Vref
SCL
SDA
VOL4
AUX0
IN4
IN3
ADR
AUX1
I
2
C Bus
Interface
VOL1
OUT1
OUT2
VOL2
IN2
IN1
NJW1184M
NJW1184
- 2 -
PIN CONFIGURATION
No. Symbol Function No Symbol Function
1 IN1 Input 1 11 V+ Power Supply Pin
2 OUT1 Output 1 12 Vref Reference Voltage
3 IN2 Input 2 13 AUX0 Auxiliary Output0
4 OUT2 Output 2 14 AUX1 Auxiliary Output1
5 CVOL1 DAC Output for Volume 1 15 CVOL4 DAC Output for Volume 4
6 CVOL2 DAC Output for Volume 2 16 CVOL3 DAC Output for Volume 3
7 ADR Slave Address Setting 17 OUT4 Output 4
8 SDA SDA Data Input (I
2
C BUS) 18 IN4 Input 4
9 SCL SCL Data Input (I
2
C BUS) 19 OUT3 Output 3
10 GND GND 20 IN3 Input 3
2
3
4
5
6
7
8
9
10
1
20
19
18
17
16
IN1
OUT1
IN2
CVOL2
A
DR
OUT2
CVOL1
SD
A
SCL
GND
IN3
OUT3
IN4
CVOL4
A
UX1
CVOL3
A
UX0
Vref
V+
15
14
13
12
11
OUT4
NJW1184
-3-
ABSOLUTE MAXIMUM RATING (Ta=25°C)
PARAMETER SYMBOL RATING UNIT
Supply Voltage V
+
15 V
Maximum Input Voltage V
IM
0 to V
+
()
V
Power Dissipation P
D
DMP20 : 350
mW
Operating Temperature Range Topr -40 to +85 °C
Storage Temperature Range Tstg -40 to +125 °C
() For the maximum input voltage less than 0 toV
+
ELECTRICAL CHARACTERISTICS
(Ta=25°C, V+=9V, R
L
=47k, Vin=100mVrms/1kHz, unless otherwise specified)
POWER SUPPLY
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
Operating Voltage V
+
7.5 9.0 13.0 V
Supply Current I
CC
No Signal - 4 10 mA
Reference Voltage V
REF
No Signal 4.0 4.5 5.0 V
VOLUME
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
Maximum Input Voltage V
IM
VOL=-20dB,THD=1% 2.8 3.0 - Vrms
Maximum Output Voltage V
OM
OUTPUT
VOL=0dB,THD=1% - 2.5 - Vrms
Channel Balance G
CB
VOL=0dB -1.0 0.0 1.0 dB
Total Harmonic Distortion THD Vo=0.5Vrms
BW=400Hz to 30kHz - - 0.3 %
Maximum Gain G
VMAX
VOL= 0dB -2.0 0.0 2.0 dB
Minimum Gain G
VMIN
VOL= MUTE, Vin=2Vrms - -100 -90 dB
Channel Separation CS Vin = 1Vrms
A-weighting - -80 -70 dB
Output Noise 1 V
NO1
VOL = 0dB
A-weighting
-
-
-90
(31.6)
-85
(56.2)
dBV
(µVrms)
Output Noise 2 V
NO2
VOL = MUTE
A-weighting
-
-
-106
(5.0)
-96
(15.8)
dBV
(µVrms)
Input Impedance Ri - 20 - k
Logic Output: High 4.5 - 5.5
AUX Output Voltage V
AUX
Logic Output: Low
0
-
0.5
V
BW: Band Width
CONTROL
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
High Level Input Voltage
V
ADRH
High : Slave Address 82H
V
+
/2 - -
V
Low Level Input Voltage
V
ADRL
Low : Slave Address 80H
- - 1.0
V
NJW1184
- 4 -
!TIMING ON THE I
2
C BUS (SDA,SCL)
!CHARACTERISTICS OF I/O STAGES FOR I
2
C BUS (SDA,SCL)
I
2
C BUS Load Conditions
STANDARD MODE : Pull up resistance 4k (Connected to +5V), Load capacitance 200pF (Connected to GND)
FAST MODE : Pull up resistance 4k
(Connected to +5V), Load capacitance 50pF (Connected to GND)
Standard mode Fast mode
PARAMETER SYMBOL
MIN. TYP. MAX. MIN. TYP. MAX.
UNIT
Low Level Input Voltage V
IL
0.0 - 1.5 0.0 - 1.5 V
High Level Input Voltage V
IH
2.7 - 5.0 2.7 - 5.0 V
Low level output voltage (3mA at SDA pin) V
OL
0 - 0.4 0 - 0.4 V
Input current each I/O pin with an input voltage
between 0.1V
DD
and 0.9V
DDmax
I
i
-10 - 10 -10 - 10 µA
SDA
SCL
t
f
t
HD:STA
t
LOW
t
r
t
HD:DAT
t
HIGH
t
f
t
SU:DAT
S
t
SU:STA
t
HD:STA
t
SP
t
SU:STO
Sr
t
r
t
BUF
PS
NJW1184
-5-
!CHARACTERISTICS OF BUS LINES (SDA,SCL) FOR I
2
C-BUS DEVICES
Standard mode Fast mode
PARAMETER SYMBOL
MIN. TYP. MAX. MIN. TYP. MAX.
UNIT
SCL clock frequency f
SCL
- - 100 - - 400 kHz
Hold time (repeated) START condition. t
HD:STA
4.0 - - 0.6 - - µs
Low period of the SCL clock t
LOW
4.7 - - 1.3 - - µs
High period of the SCL clock t
HIGH
4.0 - - 0.6 - - µs
Set-up time for a repeated START condition t
SU:STA
4.7 - - 0.6 - - µs
Data hold time
NOTE)
t
HD:DAT
0 - - 0 - - µs
Data set-up time t
SU:DAT
250 - - 100 - - ns
Rise time of both SDA and SCL signals t
r
- - 1000 - - 300 ns
Fall time of both SDA and SCL signals t
f
- - 300 - - 300 ns
Set-up time for STOP condition t
SU:STO
4.0 - - 0.6 - - µs
Bus free time between a STOP and START condition t
BUF
4.7 - - 1.3 - - µs
Capacitive load for each bus line C
b
- - 400 - - 400 pF
Noise margin at the Low level V
nL
0.5 - - 0.5 - - V
Noise margin at the High level
V
nH
1 - - 1 - -
V
C
b
; total capacitance of one bus line in pF.
NOTE). Data hold time : t
HD:DAT
Please hold the Data Hold Time (t
HD:DAT
) to 300ns or more to avoid status of unstable at SCL falling edge.
The SDA block in the NJW1184 does not hold data. Add external data-delay-circuit of the SDA terminal, in case of not
providing a hold time of at least 300nsec for the SDA in the master device.
The time-consists of the data-delay-circuit of the SDA terminal are as follows.
(a) Low level ! High level : T
LH
R
P
*C
D
(b) High level ! Low level : T
HL
R
D
*C
D
In addition, Schottky barrier diode (SBD) influences a Low level at the Acknowledge. Therefore choose the low forward
voltage (Vf) as much as possible.
MA STER
SCL
SDA
V
DD
R
P
R
P
R
D
SBD
C
D
NJW1184
NJW1184
- 6 -
50
FB
V
+
!
!!
! TERMINA L DESCRIPTION
PIN
NO. SYMBOL FUNCTION EQUIVALENT CIRCUIT
TERMINAL
DC
VOLTAGE
1
3
20
18
IN1
IN2
IN3
IN4
Input 1
Input 2
Input 3
Input 4
V
+
/2
2
4
19
17
OUT1
OUT2
OUT3
OUT4
Output 1
Output 2
Output 3
Output 4
V
+
/2
5
6
16
15
CVOL1
CVOL2
CVOL3
CVOL4
DAC Output for Volume 1
DAC Output for Volume 2
DAC Output for Volume 3
DAC Output for Volume 4
V
+
/2 – 0.7V
(0dB setting)
7 ADR Slave Address Setting
82(h)
V
ADR
> V
+
/2
80(h)
V
ADR
< 1.0V
20k
V+
8k
V
+
12k
4k
V
+
NJW1184
-7-
!
!!
! TERMINA L DESCRIPTION
PIN
NO. SYMBOL FUNCTION EQUIVALENT CIRCUIT
TERMINAL
DC
VOLTAGE
8
9
SDA
SCL
SDA Data Input (I
2
C BUS)
SCL Data Input (I
2
C BUS)
-
12 Vref
Reference Voltage
V
+
/2
13
14
AUX0
AUX1
Auxiliary Output 0
Auxiliary Output 1
0V / 5V
12k
4k
SCL:GND
SDA:ACK
VREG 5V
200k
V
+
50
VREG 5V
V
+
V
+
NJW1184
- 8 -
A PPLICATION CIRCUIT
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
IN1
NJW1184
OUT1
OUT2
IN2
CVOL1
CVOL2
SDA
A
D
R
IN3
OUT3
OUT4
IN4
CVOL3
CVOL4
AUX0
AUX1
SCL
GND
Vre
V+
10µF
1µF
1µF
1µF1µF
1µF
0.47µF
0.47µF0.47
µF
0.47µF
4.7µF
4.7µF4.7µF
4.7µF
+
+
+
+
+
+
+
+
+
+
NJW1184
-9-
DEFINITION OF I
2
C REGISTER
I
2
C BUS FORMAT
MSB LSB MSB LSB MSB LSB
S Slave Address A Select Address A Data A P
1bit 8bit 1bit 8bit 1bit 8bit 1bit 1bit
S: Starting Term
A: Acknowledge Bit
P: Ending Term
SLAVE ADDRESS
MSB LSB
1 0 0 0 0 0 ADR R/W
ADR: Hardware pin programmable address bits
80(h), 82(h)
R/W=0: Write mode for register setting
R/W=1: Not available
CONTROL REGISTER TABLE
The select address sets each function (Volume, Aux).
The auto-increment function cycles the select address as follows.
00H01H02H03H04H00H
BIT
Select
Address D7 D6 D5 D4 D3 D2 D1 D0
00H VOL-1
01H VOL-2
02H VOL-3
03H VOL-4
04H
Don’t Care Don’t Care Don’t Care Don’t Care Don’t Care Don’t Care
AUX1 AUX0
CONTROL REGISTER DEFAULT VALUE
Control register default value is all “0”.
BIT
Select
Address D7 D6 D5 D4 D3 D2 D1 D0
00H 0 0 0 0 0 0 0 0
01H 0 0 0 0 0 0 0 0
02H 0 0 0 0 0 0 0 0
03H 0 0 0 0 0 0 0 0
04H 0 0 0 0 0 0 0 0
NJW1184
- 10 -
I
2
C CONTROL COMMAND DESCRIPTION
a) Master Volume (Select Address: 00H, 01H, 02H, 03H)
Volume level : 0 to –100dB(0.5dB/step), MUTE
VOL-1 / VOL-2 / VOL-3 / VOL-4
Gain(dB) HEX D7 D6 D5 D4 D3 D2 D1 D0
0 FF 1 1 1 1 1 1 1 1
-0.5 FE 1 1 1 1 1 1 1 0
-1.0 FD 1 1 1 1 1 1 0 1
-1.5 FC 1 1 1 1 1 1 0 0
-2.0 FB 1 1 1 1 1 0 1 1
-2.5 FA 1 1 1 1 1 0 1 0
-3.0 F9 1 1 1 1 1 0 0 1
-3.5 F8 1 1 1 1 1 0 0 0
-4.0 F7 1 1 1 1 0 1 1 1
-4.5 F6 1 1 1 1 0 1 1 0
-5.0 F5 1 1 1 1 0 1 0 1
-5.5 F4 1 1 1 1 0 1 0 0
-6.0 F3 1 1 1 1 0 0 1 1
-6.5 F2 1 1 1 1 0 0 1 0
-7.0 F1 1 1 1 1 0 0 0 1
-7.5 F0 1 1 1 1 0 0 0 0
-8.0 EF 1 1 1 0 1 1 1 1
-8.5 EE 1 1 1 0 1 1 1 0
-9.0 ED 1 1 1 0 1 1 0 1
-9.5 EC 1 1 1 0 1 1 0 0
-10.0 EB 1 1 1 0 1 0 1 1
-10.5 EA 1 1 1 0 1 0 1 0
-11.0 E9 1 1 1 0 1 0 0 1
-11.5 E8 1 1 1 0 1 0 0 0
-12.0 E7 1 1 1 0 0 1 1 1
-12.5 E6 1 1 1 0 0 1 1 0
-13.0 E5 1 1 1 0 0 1 0 1
-13.5 E4 1 1 1 0 0 1 0 0
-14.0 E3 1 1 1 0 0 0 1 1
-14.5 E2 1 1 1 0 0 0 1 0
-15.0 E1 1 1 1 0 0 0 0 1
-15.5 E0 1 1 1 0 0 0 0 0
-16.0 DF 1 1 0 1 1 1 1 1
-16.5 DE 1 1 0 1 1 1 1 0
-17.0 DD 1 1 0 1 1 1 0 1
・・・ ・・・ ・・・ ・・・ ・・・ ・・・ ・・・ ・・・ ・・・ ・・・
-99.5 38 0 0 1 1 1 0 0 0
-100.0 37 0 0 1 1 0 1 1 1
・・・ ・・・ ・・・ ・・・ ・・・ ・・・ ・・・ ・・・ ・・・ ・・・
Mute 00 0 0 0 0 0 0 0 0
NJW1184
-11-
b) A UXILIARY SETTING
BIT
Select
Address D7 D6 D5 D4 D3 D2 D1 D0
04H
Don’t Care
Don’t Care Don’t Care Don’t Care Don’t Care Don’t Care
AUX1 AUX0
AUX1/AUX0: Auxiliary port High/Low
“0” : Logic output ”Low”
“1” : Logic output ”High”
NJW1184
- 12 -
! TYPICAL CHARACTERISTICS
Supply Current v s Temparature
V+=9V , Vin=No Signal , Volume=0dB
0
1
2
3
4
5
6
7
8
9
10
-50 -25 0 25 50 75 100 125
Temparature []
Supply Current [mA]
Reference Voltage vs Temparature
V+=9V , Vin=No Signal , Volume=0dB
0
1
2
3
4
5
6
7
8
9
10
-50 -25 0 25 50 75 100 125
Temparature []
Reference Voltage [V]
Supply Current vs Supply Voltage
Vin=No Signal , Volume=0dB
0
1
2
3
4
5
6
7
8
9
10
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Supply Voltage [V]
Supply Current [mA]
Ta=85
-40
25
Reference Voltage vs Supply Voltage
Vin=No Signal , Volume=0dB
0
2
4
6
8
10
12
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Supply Voltage[V]
Reference Voltage[V]
Ta=85,25,-40
O ut Noise vs Temparature
V+=9V, Rg=600, A -Weighting
-120
-100
-80
-60
-40
-20
0
-50 -25 0 25 50 75 100 125
Temparature []
Out Noise [dBV]
vol=0dB
vol=mute
Mute Level vs Temparature
V+=9V , Rg=600,Vin=1Vrms , A-Weighting
-120
-100
-80
-60
-40
-20
0
-50 -25 0 25 50 75 100 125
Temparature []
Mute Level [dB]
NJW1184
-13-
! TYPICAL CHARACTERISTICS
THD+N vs Input Volta ge (Temparature)
V+=9V, Vin=CH1, f =1kHz, volume=0dB
Rg=600, BW=400Hz-30kHz, Vout=OUT1
0.01
0.1
1
10
0.01 0.1 1 10
Input Voltage [V]
THD+N[%
]
Ta=85
25
-40
THD+N vs Input Volta g e (Volume Control)
V+=9V, Vin=CH1, f=1kHz, Ta=25
Rg=600, BW=400Hz-30kHz, Vout=OUT1
0.01
0.1
1
10
0.01 0.1 1 10
Input Voltage [V]
THD+N [%
]
vol=0dB
-10dB
-20dB
-30dB
Channel Separation vs Frequency
V+=9V , Vin=1Vrms , A-Weighting , Rg=600
Vin:IN2+IN3+IN4 , Vout:OUT1
-100
-80
-60
-40
-20
0
10 100 1000 10000 100000
Frequency [Hz]
Channel Separation[dB]
Ta=85, 25, -40
Channel Separation vs Frequency
V+=9V , Vin=1Vrms , A-Weighting , Ta=25
Rg=600
-100
-80
-60
-40
-20
0
10 100 1000 10000 100000
Frequency [Hz]
Channel Separation [dB]
OUT1,OUT2,OUT3,OUT4
THD+N vs Output Volta g e (Temparature)
V+=9V, Vin=CH1, f =1kHz, volume=0dB
Rg=600, BW=400Hz-30kHz, Vout=OUT1
0.01
0.1
1
10
0.01 0.1 1 10
Output Voltage [V]
THD+N [%
]
Ta=85
-40
25
THD+N vs O utput Voltage (Volume Contorol)
V+=9V, Vin=CH1, f=1kHz, Ta=25
Rg=600, BW=400Hz-30kHz, Vout=OUT1
0.01
0.1
1
10
0.01 0.1 1 10
Output Voltage [V]
THD+N [%
]
vol=0dB
-10dB
-20dB
-30dB
NJW1184
- 14 -
! TYPICAL CHARACTERISTICS
Gain vs Volume Control (Temparature)
V+=9V, Rg=600, Vin=1Vrms,Vin=IN1
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
0 20406080100120
Volume Control[dB]
Gain[dB]
Ta=85, 25, -40
Vout=OUT1
Channel Balance vs Volume Control (CH1-CH2)
Vin=1Vrms,V+=9V
-5
-4
-3
-2
-1
0
1
2
3
4
5
0 20406080100120
Volume Control [dB]
Channel Balance [dB]
Ta=85, 25, -40
Channel Balance vs Volume Control (CH3-CH4)
Vin=1Vrms,V+=9V
-5
-4
-3
-2
-1
0
1
2
3
4
5
0 20406080100120
Volume Control [dB]
Channel Balance [dB]
Ta=- 40
Ta=85, 25
Gain vs Volume Control
V+=9V, Rg=600, Vin=1Vrms,Ta=25
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
0 20 40 60 80 100 120
Volume Control[dB]
Gain[dB]
Vout=OUT1,2,3,4
Maximum Output Voltage vs RL
V+=9V , THD=1%
0
0.5
1
1.5
2
2.5
3
0.1 1 10 100
R
L
[k]
Maximum Output Voltage [Vrms
]
NJW1184
-15-
[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.
Mouser Electronics
Authorized Distributor
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