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PDF NJW1109 Data sheet ( Hoja de datos )
| Número de pieza | NJW1109 | |
| Descripción | Headphone Amplifier | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NJW1109 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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NJW1109
Headphone Amplifier with Electronic Volume
www.datasheet4u.com
s GENERAL DESCRIPTION
The NJW1109 is a headphone amplifier with electronic volume. It
includes widely gain adjustable volume, +20 to –80 dB, and mute
function. These are controlled by I2C bus. The NJW1109 is
suitable for headphone output on TV set.
s PACKAGE OUTLINE
NJW1109D NJW1109M NJW1109V
s FEATURES
q Operating Voltage
q Electronic Volume
q I2C Bus Interface
q Bi-CMOS Technology
q Package Outline
7.5 to 10 V
+20dB to -80dB / 0.5dB step, Mute
DIP14, DMP14, SSOP14
s BLOCK DIAGRAM
CAPa
SDA SCL
I2C
Interface
ADR
IN a VOL
OUTa
s PIN FUNCTION
1
7
IN b VOL
OUTb
Bias Vref
CAPb
V+ GND
No. SYMBOL
FUNCTION
1 V+ Power Supply
14 2 OUTb Bch Output
3 N.C. No Connect
No. SYMBOL
FUNCTION
8 SCL I2C Bus Clock Input
9 Vref Reference voltage stabilized
capacitor connect terminal
10 INa Ach Input
4 CAPb Balance control click noise 11 CAPa Volume control click noise
absorbing capacitor connect
absorbing capacitor connect
terminal
terminal
5 INb Bch Input
12 N.C. No Connect
8
6 ADR I2C Bus Slave Address
Select
7 SDA I2C Bus Data Input
13 OUTa Ach Output
14 GND Ground
–1–
1 page  
sTERMINAL DESCRIPTION
No. SYMBOL
FUNCTION
www.datasheet4u.com
6
ADR
I2C Bus Slave Address
Select
NJW1109
EQUIVALENT CIRCUIT
VOLTAGE
4k
12k
-
7 SDA
8 SCL
I2C Bus Data Input
I2C Bus Clock Input
4k
12k
-
9
Vref
Reference voltage stabilized
capacitor connect terminal
200k
200k
1.3k
V+/2
1 V+
Power Supply
14 GND
Ground
--
--
–5–
5 Page 
NJW1109
s DEFINITION OF I2C REGISTER
q I2C BUS FORMAT
MSB
www.datasheet4u.com
S Slave Address
LSB MSB
A Select Address
LSB MSB
A
1bit 8bit
1bit 8bit 1bit
S: Starting Term
A: Acknowledge Bit
P: Ending Term
q SLAVE ADDRESS
MSB
1000000
10 0 0 0 1 0
q SELECT ADDRESS
The auto-increment function cycles the select address as follows.
00H→01H→00H
Select
Address
D7
D6
D5
D4
BIT
D3
00H VOL
01H CHS
BAL
!CONTROL REGISTER DEFAULT VALUE
Control register default value is all “0”.
Select
BIT
Address
D7
D6
D5
D4
D3
00H 0 0 0 0 0
01H 0 0 0 0 0
!CONTROL COMMAND TABLE
a) Master Volume
Select
Address
D7
D6 D5
00H
•VOL : Master Volume
Attenuation level : +20 to –80dB(0.5dB/step), MUTE
BIT
D4 D3
VOL
b) Balance
Select
Address
D7
D6 D5 D4
01H CHS
BAL
•CHS : Balance channel select
“0” : Ach “Bch is attenuated”
“1” : Bch “Ach is attenuated”
•BAL : Ach and Bch Ach and Bch Balance
Balance Level : 0 to –30dB (1dB/Step) , MUTE
BIT
D3
Data
8bit
LSB
AP
1bit 1bit
LSB
0
0
80H (ADR = Low)
84H (ADR = High)
D2 D1 D0
Don’t Care
D2 D1 D0
000
000
D2 D1 D0
D2 D1 D0
Don’t Care
– 11 –
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet NJW1109.PDF ] | |
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