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Multimedia ICs
16-bit stereo D / A converter
for audio applications
BU9480F
The BU9480F is a 16-bit stereo D / A converter designed for audio applications, and has an internal 2 × oversam-
pling circuit.
•
Applications
16-bit stereo D / A converter for audio applications
•
Features
1) 3.0 to 5.5V operating voltage.
2) Low current consumption because of the CMOS
process.
3) Resistor strings method used.
4) 2-channel common phase output.
5) Internal 2 × oversampling interpolator.
6) 8 - pin plastic package.
7) Supports 4fs. (200kHz operation)
•
Block diagram
LRCK
BCLK
SDAT
LOUT
REF
ROUT
GND
V
CC
1
2
3
4
5
6
7
8
SHIFT REGISTER / LATCH
X2 OVER
SAMPLING
DAC
X2 OVER
SAMPLING
DAC
•
Pin descriptions
Pin name Function I / O Voltage
1R
OUT 1 / 2VCC
1 / 2VCC
—
1 / 2V
CC
—
—
—
—
Right channel analog signal output
2 REF
3 GND
4L
OUT
Left channel analog signal output
5
LRCK
6
7
SDAT
BCLK
VCC
8
Serial data shift clock input
Vcc
Connects the DA ref. voltage pin and ground
Ground
Pin No.
Low-impedance output
High-impedance input
—
Low-impedance output
Logic input
Logic input
Logic input
—
The signal that distinguishes between left and
right channels for serial data (left channe =
high level, right channel = low level).
Serial data input
Input with 2' compliment, MSB first.
Rev.A 1/5
