TDA1314T Datasheet, PDF (1/15 Pages) NXP Semiconductors – Quadruple filter DAC

Philips Semiconductors
Quadruple filter DAC
Product specification
TDA1314T
FEATURES
• High dynamic range to enable digital DSP (Digital Signal
Processor) volume control
• 18 bits data input format for each of the four channels
• Four times bit-serial oversampling filter
• 1st-order 4f_as (audio sampling frequency) noise shaper
• Four very low noise DACs
• Only 1st-order analog post filtering required
• Smooth power-on of the DAC output currents
• Because of the automatic digital PLL divider range
setting the master clock is selectable in a wide 4f_as
integer range
• Insensitive to jitter on the I²S-bus signals with respect to
the DAC total harmonic distortion deterioration.
APPLICATIONS
• Stand-alone quadruple low noise DAC
• Car radio DAC in conjunction with DSP.
GENERAL DESCRIPTION
The TDA1314T is a quadruple very low noise high
dynamic range DAC which is intended for use in motor
cars and is controlled by the car radio DSP. Each channel
incorporates an 8th-order IIR up-sampling filter from 1ASF
to 4ASF followed by a 1st-order noise shaper and DAC.
The DAC currents are converted to audio voltage signals
using operational amplifiers (one per channel).
QUICK REFERENCE DATA
V_ref = 2.5 and 5 V; T_amb = 25 °C; all voltages referenced to ground; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
V_DDA
V_DDD
I_O(DAC)
V_O(DAC)
RES
(THD + N)/S
DR
DS
P_tot
T_amb
analog supply voltage
digital supply voltage
DAC output current (FS)
DAC output voltage,
nominal DAC operational
amplifier output voltage
DAC resolution
total harmonic distortion
plus noise-to-signal ratio
dynamic range of DAC
digital silence
total power dissipation
operating ambient
temperature
R_ref = 20.5 kΩ
R_L ≥ 5 kΩ; R_fb = 3 kΩ
4.5
4.5
±0.4
1.0
length of data input word −
f_i = 1 kHz;
−
0 dB signal level
f_i = 1 kHz;
92
−60 dB signal level
no signal; A-weighted
−
−
−40
5.0
5.0
±0.5
−
−
−66
96
−110
85
+25
MAX.
5.5
5.5
±0.6
4.0
18
−56
−
−100
−
+85
UNIT
V
V
mA
V
bits
dB
dB
dB
mW
°C
ORDERING INFORMATION
TYPE NUMBER
TDA1314T
NAME
SO28
PACKAGE
DESCRIPTION
plastic small outline package; 28 leads; body width 7.5 mm
VERSION
SOT136-1
August 1994
2