TDA1305 Philips Semiconductors, TDA1305 Datasheet - Page 2

• Manufacturer Part Number: TDA1305
• Description: Stereo 1fs data input up-sampling filter with bitstream continuous dual DAC BCC-DAC2
• Manufacturer: Philips Semiconductors

Philips Semiconductors
FEATURES
GENERAL DESCRIPTION
The TDA1305T is a new generation of filter-DAC which
features a unique combination of bitstream and continuous
calibration techniques. The converter functions as a
ORDERING INFORMATION
1995 Dec 08
Easy application
16f
filter incorporated
Selectable system clock (f
I
16, 18 or 20 bits serial input mode (at f
Slave-mode clock system
Cascaded 4-stage digital filter incorporating 2-stage FIR
filter, linear interpolator and sample-and-hold
Smoothed transitions before and after muting
(soft mute)
Digital de-emphasis filter for three sampling rates of
32 kHz, 44.1 kHz and 48 kHz
12 dB attenuation via the attenuation input control
Double speed mode
2nd order noise shaper
96 (f
in normal speed mode
48 (f
in double speed mode
Bitstream continuous calibration concept
Small outline SO28 package
Voltage output 1.5 V (RMS) at line drive level
Low total harmonic distortion
No zero crossing distortion
Inherently monotonic
No analog post filtering required
Superior signal-to-noise ratio
Wide dynamic range (18-bit)
Single rail supply (3.4 to 5.5 V).
Stereo 1fs data input up-sampling filter with
bitstream continuous dual DAC (BCC-DAC2)
2
TYPE NUMBER
S-bus serial input format (at f
s
TDA1305T
Finite-duration Impulse-Response (FIR)
sys
sys
= 384f
= 384f
s
s
) or 128 (f
) or 64 (f
sys
sys
NAME
SO28
sys
= 256f
= 256f
) 256f
sys
s
= 256f
s
) times oversampling
s
) times oversampling
or 384f
plastic small outline package; 28 leads; body width 7.5 mm
sys
s
) or LSB fixed
= 384f
s
s
)
2
DESCRIPTION
bitstream converter for low signals while large signals are
generated using the dynamic continuous calibration
technique, thus resulting in low power consumption, small
chip size and easy application.
The TDA1305T is a dual CMOS DAC with up-sampling
filter and noise shaper. The combination of high
oversampling up to 16f
continuous calibration conversion ensures that only simple
1st order analog post filtering is required.
The TDA1305T supports the I
word lengths of up to 20 bits (at f
fixed serial data input format with word lengths of 16, 18
and 20 bits (at f
increase the oversampling rate to 16 times. A
sample-and-hold function increases the oversampling rate
to 96 times (f
2nd order noise shaper converts this oversampled data to
a bitstream for the 5-bit DACs.
The DACs are of the continuous calibration type and
incorporate a special date coding. This ensures an
extremely high signal-to-noise ratio, superior dynamic
range and immunity to process variation and component
ageing.
Two on-board operational amplifiers convert the
digital-to-analog current to an output voltage. Externally
connected capacitors perform the required 1st order
filtering so that no further post filtering is required.
The unique combination of bitstream and continuous
calibration techniques, together with a high degree of
analog and digital integration, results in a single filter-DAC
with 18-bit dynamic range, high linearity and simple low
cost application.
PACKAGE
sys
sys
= 384f
= 384f
s
s
) or 128 times (f
, 2nd order noise shaping and
s
). Four cascaded FIR filters
2
S-bus data input mode with
Preliminary specification
sys
= 256f
TDA1305T
sys
s
= 256f
SOT136-1
VERSION
) and the LSB
s
). A