uda1321 NXP Semiconductors, uda1321 Datasheet - Page 3

• Manufacturer Part Number: uda1321
• Description: Universal Serial Bus Usb Digital-to-analog Converter Dac
• Manufacturer: NXP Semiconductors

Philips Semiconductors
The control information becomes accessible at the
microcontroller. The audio information becomes available
at the digital I/O output or is fed directly to the ADAC.
The microcontroller handles the high-level USB protocols,
translates the incoming control requests and manages the
user interface via General Purpose (GP) pins and an
I
The ADAC enables the wide and continuous range of input
sampling frequencies. By means of a Sample Frequency
Generator (SFG), the ADAC is able to reconstruct the
average sample frequency from the incoming audio
samples. The ADAC also performs the sound processing.
QUICK REFERENCE DATA
Notes
1. V
2. The audio information from the USB interface is fed directly to the ADAC.
3. The power-save mode (power management) is not supported in the UDA1321/N101;
1998 Oct 06
2
Supplies
V
I
I
Dynamic performance DAC
S/N
V
General characteristics
f
T
THD
---------------------- -
DD(tot)
DD(ps)
i(sample)
C-bus.
SYMBOL
amb
DD
o(FS)(rms)
Universal Serial Bus (USB)
Digital-to-Analog Converter (DAC)
All V
see Chapter “USB-DAC UDA1321/N101 (Firmware sw 2.1.1.7)”.
bz
S
DD
+
N
is the supply voltage on pins V
DD
and V
supply voltage
total supply current
supply current in power-save
mode
total harmonic
distortion-plus-noise to signal
ratio
signal-to-noise ratio at bipolar
zero
full-scale output voltage
(RMS value)
audio sample input frequency
operating ambient temperature
SS
pins must be connected to the same supply or ground respectively.
PARAMETER
DDA
, V
DDE
, V
note 1
note 3
f
A-weighted at code 0000H
V
s
DD
= 44.1 kHz; R
at input signal of 1 kHz (0 dB)
at input signal of 1 kHz ( 60 dB)
DDI
= 3.3 V
and V
3
CONDITIONS
The ADAC consists of FIFO registers, a unique audio
feature processing DSP, the SFG, digital up-sampling
filters, a variable hold register, a Noise Shaper (NS) and a
Filter Stream DAC (FSDAC) with integrated filter and line
output drivers. The audio information is applied to the
ADAC via the USB processor or via the digital I/O input.
An external DSP can be used for adding extra sound
processing features via the digital I/O-bus.
The UDA1321 supports the standard I
format and the LSB-justified serial data input format with
word lengths of 16, 18 and 20 bits.
The wide dynamic range of the bitstream conversion
technique used in the UDA1321 guarantees a high audio
sound quality.
DDX
. V
L
= 5 k
SS
is the ground on pins V
3.0
90
5
0
MIN.
SSA
3.3
50
18
0.0032 0.01
3.2
95
0.66
25
Preliminary specification
TYP.
90
30
, V
(2)
(2)
2
SSE
S-bus data input
UDA1321
3.6
10
55
70
MAX.
, V
80
20
SSI
and V
V
mA
mA
dB
%
dB
%
dBA
V
kHz
UNIT
C
SSX
.