NJW1109 Datasheet, PDF (1/14 Pages) New Japan Radio – Headphone Amplifier with Electronic Volume

NJW1109
Headphone Amplifier with Electronic Volume
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–