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NJW1156A
2-CHANNEL ELECTRONIC VOLUME WITH INPUT SELECTOR
s GENERAL DESCRIPTION NJW1156A is a two channel electronic volume with 5 input selector. It's suitable for Input signal trimmer of audio equipments such as DVD / HDD recorder and 2 VCR. These functions are controlled by I C Bus. NJW1156A changes high input impedance (38.5k)
compared with NJW1156.
s PACKAGE OUTLINE
NJW1156AV
s FEATURES q Operating Voltage 2 q I C Bus control q 5 Input Selector q Volume q Bi-CMOS Technology q Package Outline s BLOCK DIAGRAM
8 to 13V 0 to -39.5dB/0.5dBstep, MUTE SSOP20
A/D
I2C Interface
INPUTS
I2C Control
V+ INPUTS GND
V+
GND
A/D
-1-
NJW1156A
s PIN FUNCTION
No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 SYMBOL GND R1IN R2 IN R3IN R4IN R5IN ROUT VSSOUT SCL SDA VDDOUT VREFOUT V+ VREFIN LOUT L5IN L4IN L3IN L2IN L1IN FUNCTION
Ground R channel Input 1 R channel Input 2 R channel Input 3 R channel Input 4 R channel Input 5 R channel Output Internal VSS Noise Rejection Capacitor Terminal I2C Clock Input I2C Data Input Internal VDD Noise Rejection Capacitor Terminal Reference Voltage Output Power Supply Reference Voltage Noise Rejection Capacitor Terminal L channel Output L channel Input 5 L channel Input 4 L channel Input 3 L channel Input 2 L channel Input 1
20
11
1
10
s ABSOLUTE MAXIMUM RATING (Ta=25C) PARAMETER SYMBOL
Power Supply Voltage Power Dissipation Operating Temperature Range Storage Temperature Range V+ PD Topr Tstg
RATING
15 300 -20 to +75 -40 to +125
UNIT
V mW C C
s ELECTRICAL CHARACTERISTICS (Ta=25C,V+=+12V) PARAMETER x Power Supply Operating Voltage Reference Voltage Supply Current x Input/Output Characteristics
Maximum Output Voltage Voltage Gain 1 Voltage Gain 2 Voltage Gain 3 Voltage Gain Error Mute Level Output Noise Total Harmonic Distortion VOM GV1 GV2 GV3 GV Mute VNO THD f=1kHz,THD=1% Volume=0dB VIN=1Vrms, f=1kHz Volume=0dB VIN=1Vrms, f=1kHz Volume=-20dB VIN=1Vrms, f=1kHz Volume=-39.5dB VIN=1Vrms, f=1kHz Volume=-20dB , Ach - Bch f=1kHz, VIN=1Vrms Volume=Mute, A-weight Volume=0dB, Rg=0,A-weight f=1kHz,Vo=1Vrms, Volume=0dB BW : 400Hz - 30kHz f=1kHz,Vo=1Vrms, Volume=0dB Rg=0, A-weight 3.0 -0.5 -21 -42.0 -0.5 4.0 0 -20 -39.5 0 -100 -110 (3.2) 0.0015 0.5 -19 -37.0 0.5 -100 (10) 0.05 Vrms dB dB dB dB dB dBV (Vrms) % V+ Vref ICC No signal 8 5.5 12 6 4.5 13 6.5 6.8 V V mA
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
Channel Separation
CS
-
-100
-90
dB
-2-
NJW1156A
s I C BUS BLOCK CHARACTERISTICS (SDA,SCL)
PARAMETER High Level Input Voltage Low Level Input Voltage High Level Input Current Low Level Input Current Low Level Output Voltage (3mA at SDA pin) Maximum Output Current Maximum Clock Frequency Data Change Minimum Waiting Time Data Transfer Start Minimum Waiting Time Low Level Clock Pulse Width High Level Clock Pulse Width Minimum Start Preparation Waiting Time Minimum Data Hold Time Minimum Data Preparation Time Rise Time Fall Time Minimum Stop Preparation Waiting Time SYMBOL VIH VIL IIH IIL VOL IOL fSCL tBUF tHD:STA tLOW tHIGH tSU:STA tHD:DAT tSU:DAT tR tF tSU:STO MIN. 2.5 0 0 -3.0 4.7 4.0 4.7 4.0 4.7 0 250 4.0 TYP. MAX. 5.0 1.5 10 10 0.4 100 3.45 1.0 300 UNIT V V A A V mA kHz
2
s s s s s s ns s ns s
I C BUS Load Condition:
2
Pull up resistance 4k (Connected to +5V) Load capacitance 200pF (Connected to GND)
SDA
tBUF
tR
tF
tHD:STA
SCL
tHD:STA tLOW P S
tHD:DAT
tHIGH
tSU:DAT Sr
tSU:STA
tSU:STO P
-3-
NJW1156A
TERMINAL DESCRIPTION
PIN NO. SYMBOL FUNCTION EQUIVALENT CIRCUIT TERMINAL DC VOLTAGE
2 3 4 5 6 16 17 18 19 20
R1IN R2IN R3IN R4IN R5IN L5IN L4IN L3IN L2IN L1IN
R channel Input 1 R channel Input 2 R channel Input 3 R channel Input 4 R channel Input 5 L channel Input 5 L channel Input 4 L channel Input 3 L channel Input 2 L channel Input 1
V+
300 150K GND VREF 50K VREF
V /2
+
V+ 400
7 15
ROUT LOUT
Rch Output Lch Output
V /2
+
GND
V+ VSS_OUT =Vref - 2.5V VDD_OUT =Vref + 2.5V GND
8 11
VSS_OUT VDD_OUT
Internal VSS Noise Rejection Capacitor Terminal Internal VDD Noise Rejection Capacitor Terminal
4K
9
SCL
I C Clock Input
8K GND
2
-
-4-
NJW1156A
TERMINAL DESCRIPTION
PIN NO. SYMBOL FUNCTION EQUIVALENT CIRCUIT TERMINAL DC VOLTAGE
4K
10
SDA
I C Data Input
8K GND
2
-
V+ 400
12
VREFOUT
Reference Voltage Output
V /2
+
GND
13
V+
Power Supply
GND
V+
V+
50K
14
VREFIN
Reference Voltage Noise Rejection Capacitor Terminal
V /2
50K
+
GND
-5-
NJW1156A
s APPLICATION CIRCUIT
1 10F R1IN 10F R2IN 10F R3IN 10F R4IN 10F R5IN 10F ROUT 10F 8 7 6 5 4 3 2
GND
20 10F 19 10F 18 17 16 10F 15 10F VREFIN 14 1F 100F
L1IN L2IN L3IN 10F L4IN 10F L5IN LOUT
VSSOUT V+ I2C Interface
13 12
SCL SDA
9 10
VREFOUT VDDOUT 11
10F 10F
-6-
NJW1156A
s DEFINITION OF I C REGISTER 2 I C BUS FORMAT
MSB LSB MSB LSB MSB LSB
2
S
1bit
Slave Address
8bit
A
1bit
Select Address
8bit
A
1bit
Data
8bit
A
1bit
P
1bit
S: Starting Term A: Acknowledge Bit P: Ending Term
SLAVE ADDRESS
MSB LSB
1
0
0
0
0
0
1
0
CONTROL REGISTER TABLE
The select address sets each function (Volume, Selector). The auto increment function cycles the select address as follows. 00H01H02H00H
Select Address 00H 01H 02H
BIT D7
Don't Care Don't Care Don't Care
D6
D5
D4
D3 VOL-L VOL-R
D2
D1
D0
TEST
Don't Care
Selector
CONTROL REGISTER DEFAULT VALUE Control register default values are as follows :
Select Address 00H 01H 02H BIT D7 D6 D5 D4 D3 D2 D1 D0
1 1
0
1 1
0
1 1
0
1 1
0
1 1
0
1 1
0
1 1
0
1 1
0
-7-
NJW1156A
s CONTROL COMMAND TABLE a) Master Volume
Select Address 00H 01H BIT D7
Don't Care Don't Care
D6
D5
D4
D3 VOL-L VOL-R
D2
D1
D0
*VOL-L / VOL-R: Lch and Rch volume level setting from 0dB to -39.5dB with 0.5dB step.
VOL-L / VOL-R D3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 *** 1 1
Gain (dB) 0 -0.5 -1 -1.5 -2 -2.5 -3 -3.5 -4 -4.5 -5 -5.5 -6 -6.5 -7 -7.5 -8 -8.5 -9 -9.5 -10 -10.5 -11 -11.5 -12 -12.5 -13 -13.5 -14 -14.5 -15 -15.5 -16 -16.5 -17 -17.5 -18 -18.5 -19 -19.5 -20 *** -39.5 Mute
D6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 *** 1 1
D5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 *** 0 1
D4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 *** 0 1
D2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 *** 1 1
D1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 *** 1 1
D0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 *** 1 1
-8-
NJW1156A
b)Input Selector
Select Address 02H BIT D7
Don't Care
D6 TEST
D5
D4
Don't Care
D3
D2
D1 Selector
D0
*TEST : Test Mode(User Inhibit). The command "TEST"(D6, D5) must be "0". *Selector : Input signal selecting
Selector Input
L1IN / R1IN L2IN / R2IN L3IN / R3IN L4IN / R4IN L5IN / R5IN
D2 0 0 0 0 1
D1 0 0 1 1 0
D0 0 1 0 1 0
-9-
NJW1156A
TYPICAL CHARACTERISTICS
Operating Current vs. Supply Voltage Ta=25oC 4.5 4 3.5 Operating Current [mA] Voltage Gain [dB] 3 2.5 2 1.5 1 0.5 0 0 5 10 Supply Voltage [V] THD+N vs. Input Level V +=12V, VOL=0dB, BW=10Hz-80kHz INPUT:L1IN, OUTPUT:LOUT 10 15 0 -5 -10 -15 -20 -25 -30 -35 -40 -45 0 -5 -10 -15 -20 -25 -30 -35 -40 -45 Attenuator Set Level [dB] THD+N vs. Input Level V +=12V, f=1kHz, BW=10Hz-80kHz INPUT:L1IN, OUTPUT:LOUT L1,R1IN Voltage Gain vs. Attenuater Set Level Ta=25oC
10
-20dB
1 THD+N [%] 1
0.1
THD+N [%]
-30dB
0.1
20kHz
0.01
0.01
0dB
20Hz,1kHz
0.001 -40 -20 0 Input Level [dB] 20 0.001 -40
-10dB
-20 0 Input Level [dB] 20
Operating Current vs. Supply Voltage
5
Operating Current vs. Ambient Temperature V +=12V 5
4
3
Operating Current [mA]
25oC
Operating Current [mA]
4.5
4
2
125 C
o
-40oC
3.5
1
0 0 5 Supply Voltage [V] 10 15
3 -50
0
50
100
150
Ambient Temperature [oC]
- 10 -
NJW1156A
TYPICAL CHARACTERISTICS
Voltage Gain vs. Ambient Temperature V +=12V,V in=1V,f=1kHz,Vol=0dB 1.0 -10 Attenuation Level vs. Ambient Temperature V +=12V,V in=1V,f=1kHz,Vol=-20dB
0.5 Attenuation Level [dB] Voltage Gain [dB]
-15
0.0
-20
-0.5
L1,R1IN
-25
L1,R1IN
-1.0 -50 0 50 100 150 Ambient Temperature [oC] Attenuation Level vs. Ambient Temperature V+=12V,Vin=1V,f=1kHz,Vol=-39.5dB -30
-30 -50 0 50 100 150 Ambient Temperature [oC] Attenuation Level vs. Ambient Temperature V+=12V,Vin=1V,f=1kHz,Vol=Mute -80 -85 -90
-35 Attenuation Level [dB] Attenuation Level [dB] -95 -100 -105 -110 -115 -120 -125 -50 -50 -130 -50
R1IN
-40
-45
L1,R1IN
L1IN
0
50
100
150
0
50
100
150
Ambient Temperature [oC]
Ambient Temperature [oC]
Maximam Output Voltage vs. Ambient Temperature V+=12V,f=1kHz,THD+N=1%,Vol=0dB 13.0 12.5 Maximum Output Voltage [dBV] Output Noise Level [dBV] 12.0 11.5 11.0 -60 -70 -80 -90 -100 -110 -120
Output Noise Level vs. Ambient Temperature V+=12V,Rg=0,Vol=0dB,A-w eight
L1,R1IN
10.5 10.0 9.5 9.0 -50 0 50 100 150 Ambient Temperature [oC]
R1IN
L1IN
0 50 100 150
-130 -50
Ambient Temperature [oC]
- 11 -
NJW1156A
TYPICAL CHARACTERISTICS
THD+N vs. Ambient Temperature V +=12V,V in=1V,f=1kHz,THD+N=1%,Vol=0dB 10
1
THD+N [%]
0.1
0.01
L1IN
0.001 -50
R1IN
0 50 100 150
Ambient Temperature [oC]
[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.
- 12 -

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