NJU7394

NJU7394
Pushbutton Interface EVR
„ GENERAL DESCRIPTION
The NJU7394 is a pushbutton interface electronic volume.
It includes a electronic volume controller with differential input,
attenuator function, some indicator and a stand-by function
(Power-saving mode).
The NJU7394 has also built-in push button interface for its
volume UP/DOWN controls and power ON/OFF controls making application possible without the use of micro-controller.
The NJU7394 is suitable for low power application and also for
application without micro-controller such as mobile audio player
and cradle speaker for mobile game.
„ FEATURES
• Operating Voltage
• Low operating current
„ PACKAGE OUTLINE
NJU7394VC3
+2.7 to +5.5V
2mA typ. (Active mode)
1µA typ. (stand-by mode)
• Pop-noise reduction
• Quasi-differential input
• Pushbutton interface EVR
• Adjustable initial Volume
• Attenuator / Soft MUTE Function
• CMOS Technology
• Package Outline
+6 to -62dB, MUTE
-6dB, -10dB, -14dB, -18dB
-10dB, -15dB, -20dB, MUTE
SSOP20-C3
„ BLOCK DIAGRAM
V+ Power
indicator
Power Button
V+
V+ Volume
indicator
V+
Bias
Power
V+
SWMODE PWSW
PWIND
VOLIND
IREF
Power Contrel
Logic
Standby
V+
VREF
GND
Bias
STBY
Input L
Output L
Attenuator
Electric Volume
Input G
Bypass/Att.
(-10dB, -15dB,
-20dB, Mute)
(+6dB to -62dB, Mute)
Output R
Input R
Volume Control Logic
ATTADJ
VOLADJ
ATT
V
Attenuate level
adjuster
-10,-15,-20dB,Mute
RATT
RINIT
UP
DOWN TEST
+
Initial volume
adjuster
-6,-10,-14,-18 dB
Up
Down
V+
Test mode
V+
Attenuator
NJU7394 Ver.3.3 _E
-1-
NJU7394
„ PIN CONFIGURATION
-2-
20
11
1
10
No.
Symbol
Function
No
Symbol
Function
1
INL
Lch Input
11
VOLIND
Volume Indicator
2
ING
Common Input
12
PWIND
Power Indicator
3
INR
Rch Input
13
VOLADJ
Initial Volume Adjustor
4
SWMODE
Control Mode Setting
14
AT TA D J
Attenuator Adjustor
5
STBY
Standby Setting
15
V+
Power Supply
6
AT T
Attenuator Setting
16
GND
Ground
7
PWSW
Power Switch
17
IREF
Reference Current
8
UP
Volume Up Switch
18
OUTR
Rch Output
9
DOWN
Volume Down Switch
19
VREF
Reference Voltage
10
TEST
Test Terminal
20
OUTL
Lch Output
NJU7394
„ ABSOLUTE MAXIMUM RATING (Ta=25°C)
PARAMETER
SYMBOL
+
Power Supply Voltage
V
Power Dissipation
+7
V
540*
mW
+ 2)
VIMAX
Operating Temperature Range
UNIT
1)
PD
Maximum Input Voltage
RATING
0 to V *
Topr
V
-40 to +85
Storage Temperature Range
Tstg
-40 to +125
*1) EIA/JEDEC STANDARD Test board (76.2x114.3x1.6mm, 2layer, FR-4) mounting
*2) Don’t apply the input voltage that exceeds supply voltage.
o
C
o
C
„ ELECTRICAL RECOMMENDED OPERATING CONDITION (Ta=25°C)
PARAMETER
Operating Voltage
SYMBOL
V
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
-
2.7
3.3
5.5
V
MIN.
TYP.
MAX.
UNIT
-
2.0
3.0
mA
-
0.1
1.0
µA
1.5
1.65
1.8
V
+
„ ELECTRICAL CHARACTERISTICS
+
●DC CHARACTERISTICS (Ta=25°C, V =3.3V, unless otherwise specified)
PARAMETER
Operating Current
Reference Voltage
SYMBOL
IDD1
TEST CONDITION
No Signal, Active
3)
IDD2
No Signal, Standby*
VREF
No signal
*3) In case of the voltage of each terminal SWMODE, STBY, ATT, PWSW, UP, DOWN and TEST is “L”=0V.
●AC CHARACTERISTICS
+
(Ta=25°C, V =3.3V, VIN=500mVrms, f=1kHz, ATT: OFF, VOL: 6dB, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
Maximum Input Voltage
VIM
THD=1%
BW=400Hz-30kHz
500
550
-
mVrms
Output Noise Voltage 1
VNO1
Rg=0Ω, A-weighted
-
-100
(10)
-94
(20)
dBV
(µVrms)
Output Noise Voltage 2
VNO2
Rg=0Ω, A-weighted
VOL=-62dB
-
-100
(10)
-94
(20)
dBV
(µVrms)
THD+N
VIN=250mVrms
BW=400Hz-30kHz
-
0.05
0.1
%
5.0
6.0
7.0
dB
Total Harmonic Distortion
Maximum Gain
GVMAX
Initial Volume 1
GVINIT1
Power-on state
RINIT=0Ω
-8.0
-6.0
-4.0
dB
Initial Volume 2
GVINIT2
Power-on state
RINIT=47kΩ
-12.0
-10.0
-8.0
dB
Initial Volume 3
GVINIT3
Power-on state
RINIT=100kΩ
-16.0
-14.0
-12.0
dB
Initial Volume 4
GVINIT4
Power-on state
RINIT=OPEN
-20.0
-18.0
-16.0
dB
Maximum Attenuate level
GV-62
VOL=-62dB
BW=400Hz-30kHz
-64
-62
-60
dB
Mute Level
Mute
VOL=MUTE
BW=400Hz-30kHz
-
-90
-84
dB
-3-
NJU7394
PARAMETER
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
ATT Level 1
GVATT1
ATT:ON
RATT=0Ω
-12.0
-10.0
-8.0
dB
ATT Level 2
GVATT2
ATT:ON
RATT=47kΩ
-17.0
-15.0
-13.0
dB
ATT Level 3
GVATT3
ATT:ON
RATT=100kΩ
-22.0
-20.0
-18.0
dB
ATT Mute Level
GVATT4
ATT:ON, RATT=OPEN
BW=400Hz-30kHz
-
-100
-90
dB
-1.0
0.0
1.0
dB
80
90
-
dB
Channel Balance
GCB
Channel Separation
CS
Rg=0Ω
BW=400Hz-30kHz
● Indicator Output Block (Ta=25°C, V+=3.3V, unless otherwise specified)
PARAMETER
High Output Voltage
Low Output Voltage
SYMBOL
VOH
VOL
TEST CONDITION
ISOURCE=1mA (pin 11, pin 12)
MIN.
+
V *0.8
ISINK=1mA (pin 11, pin 12)
TYP.
-
MAX.
+
V
+
UNIT
V
0
-
V *0.2
V
MIN.
TYP.
MAX.
UNIT
+
● Control Block (Ta=25°C, V =3.3V, unless otherwise specified)
PARAMETER
High Input Voltage
SYMBOL
VIH
Low Input Voltage
VIL
Pull-Up Resistance
RPULLUP
Mode Resistance range 1/4
TEST CONDITION
pin4, pin5, pin6, pin7, pin8, pin9
+
V *0.8
-
+
V
+
V *0.2
V
pin4, pin5, pin6, pin7, pin8, pin9
0
-
V
-
100
-
kΩ
RMODE1
pin 13, pin 14
0
-
20
kΩ
Mode Resistance range 2/4
RMODE2
pin 13, pin 14
40
-
60
kΩ
Mode Resistance range 3/4
RMODE3
pin 13, pin 14
90
-
110
kΩ
Mode Resistance range 4/4
RMODE4
pin 13, pin 14
150
-
∞
kΩ
Pulse Distinction Time
15
20
25
ms
Auto Increment Distinction Time
0.8
1
1.2
S
Auto Increment cycle
133
167
200
ms
-4-
NJU7394
„ TERMINAL DESCRIPTION
PIN NO.
SYMBOL
FUNCTION
TERMINAL
DC
VOLTAGE
EQUIVALENT CIRCUIT
V+
1
INL
3
INR
Lch Input
Rch Input
V+
52.5Ω
V+/2
100kΩ
10pF
10pF
V+
2
ING
V+
52.5Ω
Common Input
1kΩ
V+/2
10pF
500kΩ
10pF
VREF
V+
4
SWMODE
Control Mode Setting
5
STBY
Standby Setting
6
ATT
Attenuator Setting
V+
It depends
on a mode
setting.
52.5Ω
V+
7
PWSW
Power Switch
8
UP
Volume Up Switch
9
DOWN
Volume Down Switch
10
TEST
Test Terminal
V+
V+
52.5Ω
V+
0V
100kΩ
-5-
NJU7394
PIN NO.
SYMBOL
FUNCTION
V+
11
VOLIND
Volume Indicator
12
PWIND
Power Indicator
TERMINAL
DC
VOLTAGE
EQUIVALENT CIRCUIT
V+
It depends
on a mode
setting.
52.5Ω
V+
V+
V+
V+
12µA
It depends
on a mode
setting.
13
VOLADJ
Initial Volume Adjustor
14
ATTADJ
Attenuator Adjustor
15
V+
Power Supply
V+
16
GND
Ground
0V
-6-
52.5Ω
NJU7394
PIN NO.
SYMBOL
FUNCTION
V+
V+
V+
5kΩ
17
IREF
Reference Current
V+
18
OUTR
Rch Output
20
OUTL
Lch Output
5kΩ
1.2V
V+
V+
+
V /2
V+/2
V+
V+
200kΩ
VREF
V+
52.5Ω
V+
19
TERMINAL
DC
VOLTAGE
EQUIVALENT CIRCUIT
V+
20kΩ
52.5Ω
Reference Voltage
200kΩ
V+/2
20kΩ
-7-
NJU7394
„ PIN DESCRIPTION
SWMODE (pin 4)
PIN CONDITION
FUNCTION
L
PWSW: Momentary SW mode.
H
PWSW: Toggle SW mode.
Momentary SW mode data format
High
Mode Change
[ ex. ON ]
Mode Change
[ ex. OFF ]
Mode Change
[ ex. ON ]
Low
Toggle SW mode data format
High
Mode Change
[ ex. ON ]
Mode Change
[ ex. OFF ]
Mode Change
[ ex. ON ]
Low
STBY (pin 5)
●Toggle SW Mode
PIN CONDITION
FUNCTION
L
When SWMODE and PWSW are Low, IC becomes a standby mode.
H
When PWSW is High, IC becomes active mode.
* The “Momentary SW mode” does not support.
ATT (pin 6)
●Toggle SW Mode
PIN CONDITION
FUNCTION
L
Attenuator: OFF
H
Attenuator: ON
* The “Momentary SW mode” does not support.
PWSW (pin 7)
●Momentary SW mode setting
PIN CONDITION
FUNCTION
OPEN(L)→H
System status is changed to active mode and standby mode alternately.
H→OPEN(L)
No change.
●Toggle SW mode setting
PIN CONDITION
H
OPEN(L)
-8-
FUNCTION
Active mode
Standby Mode.
NJU7394
UP (pin 8)
●Momentary SW mode setting
PIN CONDITION
FUNCTION
OPEN(L)→H
Volume setting is increased 1 step. Long push increase volume setting continuously.
H→OPEN(L)
No change.
* The “Toggle SW mode” does not support.
DOWN (pin 9)
●Momentary SW mode setting
PIN CONDITION
FUNCTION
OPEN(L)→H
Volume setting is decreased 1 step. Long push decrease volume setting continuously.
H→OPEN(L)
No change.
* The “Toggle SW mode” does not support.
TEST (pin 10)
PIN CONDITION
FUNCTION
L
Normal operation mode
H
Test mode. Do not use for normal operation.
VOLADJ (pin 13)
CONNECTED
RESISTANCE
FUNCTION
0Ω to 20kΩ
Volume initial value: -6dB
40Ω to 60kΩ
Volume initial value: -10dB
90kΩ to 110kΩ
Volume initial value: -14dB
150kΩ to OPEN
Volume initial value: -18dB
ATTADJ (pin 14)
CONNECTED
RESISTANCE
FUNCTION
0Ω to 20kΩ
Attenuator initial value: -10dB
40Ω to 60kΩ
Attenuator initial value: -15dB
90kΩ to 110kΩ
Attenuator initial value: -20dB
150kΩ to OPEN
Mute
-9-
NJU7394
„CONTROL DATA
●INITIAL CONDITION (POWER ON)
FUNCTION
TERMINAL
Power
Pin 7
Volume
Pin 8, Pin 9
CONDITION
Standby
-6dB, -10dB, -14dB, -18dB
●Volume gain step setting
Step No.
Volume [dB]
0
MUTE
1
-62
2
-58
3
-54
4
-50
5
-46
6
-42
7
-39
8
-36
9
-33
10
-30
11
-28
12
-26
13
-24
14
-22
15
-20
16
-18(*)
17
-16
18
-14(*)
19
-12
20
-10(*)
21
-8
22
-6(*)
23
-4
24
-2
25
0
26
+1
27
+2
28
+3
29
+4
30
+5
31
+6
(*)
- 10 -
Initial Setting
NJU7394
■ TIMING CHART (Momentary SW mode)
●Standby release (Standby mode Æ Active mode)
PWSW (pin7)
High
Low or
OPEN
PWIND (pin12)
20ms
High
Low
280ms
Output
(pin18, pin20)
40ms
+
V /2
0V
●Standby (Active mode Æ Standby mode)
PWSW (pin7)
High
Low or
OPEN
20ms
High
PWIND (pin12)
Low
40ms
Output
(pin18, pin20)
280ms
V+/2
0V
- 11 -
NJU7394
■ TIMING CHART (Toggle SW mode)
●Standby release (Standby mode Æ Active mode)
High
PWSW (pin7)
Low or
OPEN
PWIND (pin12)
20ms
High
Low
280ms
Output
(pin18, pin20)
+
V /2
0V
●Standby (Active mode Æ Standby mode)
PWSW (pin7)
High
Low or
OPEN
20ms
High
PWIND (pin12)
Low
40ms
Output
(pin18, pin20)
V+/2
0V
- 12 -
280ms
40ms
NJU7394
■ TIMING CHART (Volume UP/DOWN control)
1. Recognition condition of Volume UP/DOWN push button I/F
1-a.) The Volume UP/(DOWN) recognizes the data-command to the case that the DOWN(UP) button has not been pushed,
besides that the UP(DOWN) button is pushed for the longer time than the “Pulse Distinction Time: 20ms".
1-b.) The Volume UP/(DOWN) recognizes the data-command to the case that the UP(DOWN) button has pushed earlier
than the DOWN(UP) button, besides the UP(DOWN) button is pushed for the longer time than the “Pulse Distinction
Time: 20ms".
> Pulse Distinction Time
(20ms typ.)
Recognition
> Pulse Distinction Time
(20ms typ.)
Recognition
UP
UP
DOWN
DOWN
1-a
1-b
2. Invalidity condition of Volume UP/DOWN push button I/F
2-a.) The Volume UP/(DOWN) does NOT recognize the data-command to the case that the UP(DOWN) button has pushed
for the shorter time than the “Pulse Distinction Time: 20ms". (The Chattering prevention function operates.)
2-b.) The Volume UP/(DOWN) does NOT recognize the data-command to the case that the UP(DOWN) button has pushed
for the shorter time than the “Pulse Distinction Time: 20ms" after released button. (The Chattering prevention function
operates.)
2-c.) The Volume UP/(DOWN) does NOT recognize the data-command to the case that the UP(DOWN) button has pushed
before releasing DOWN(UP) button.
< Pulse Distinction Time
(20ms typ.)
< Pulse Distinction Time
(20ms typ.)
UP
UP
UP
DOWN
DOWN
DOWN
2-a
2-b
2-c
- 13 -
NJU7394
■ TIMING CHART (Volume UP/DOWN control)
3. Start condition of Volume UP/DOWN Auto increment function
3-a.) The Auto increment of volume UP(DOWN) is started to the case that the DOWN(UP) button has not been pushed,
besides that the UP(DOWN) button is pushed for the longer time than the “Auto increment Distinction Time: 1s".
> Auto increment Distinction Time
(1s typ.)
Auto increment starts
UP
DOWN
3-a
4. Stop condition of Volume UP/DOWN Auto increment function
4-a.) The Auto increment of volume UP(DOWN) is stopped to the case that the UP(DOWN) button has released for the
longer time than the “Pulse Distinction Time: 20ms" for the Auto increment period.
4-b.) The Auto increment of volume UP(DOWN) is stopped to the case that the DOWN(UP) button has pushed for the Auto
increment period.
Auto increment
Distinction Time
(1s typ.)
Increment start
UP
DOWN
Auto increment
Distinction Time
(1s typ.)
Increment start
UP
Increment stop
4-a
- 14 -
Pulse Distinction Time
(20ms typ.)
DOWN
Increment stop
4-b
NJU7394
■ APPLICATION CIRCUIT
V+
Output L
Output R
V+
V+
PWIND
VOLIND
UP
DOWN
TEST
1
2
3
4
5
6
7
8
9
10
V+
PWSW
11
ATT
12
STBY
13
VOLADJ
14
ATTADJ
15
GND
IREF
16
SWMODE
OUTR
17
RINIT
INR
VREF
18
RATT
ING
19
1µF
100k Ω
INL
20
OUTL
1µF
NJU7394
0.47µF
V+
V+
V+
V+
V+
Input R
Input G
Input L
0.47µF 1µF
[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.
- 15 -