Philips Semiconductors
Low-voltage low-power stereo audio
CODEC with DSP features
Product specification
UDA1344TS
AC CHARACTERISTICS
VDDD = VDDA = VDDO = 3.0 V; fi = 1 kHz; Tamb = 25 °C; RL = 5 kΩ; all voltages referenced to ground; unless otherwise
specified.
SYMBOL
PARAMETER
CONDITIONS
TYP. MAX. UNIT
Analog-to-digital converter
Vi(rms)
input voltage (RMS value)
notes 1 and 2
1.0
∆Vi
unbalance between channels
0.1
(THD + N)/S total harmonic distortion-plus-noise to signal ratio at 0 dB
−85
at −60 dB; A-weighted −35
S/N
αcs
PSRR
signal-to-noise ratio
channel separation
power supply rejection ratio
Vi = 0 V; A-weighted
95
100
fripple = 1 kHz;
30
Vripple = 300 mV (p-p)
Digital-to-analog converter
Vo(rms)
output voltage (RMS value)
notes 3 and 4
900
∆Vo
unbalance between channels
0.1
(THD + N)/S total harmonic distortion-plus-noise to signal ratio at 0 dB
−90
at −60 dB; A-weighted −37
S/N
signal-to-noise ratio
code = 0; A-weighted 100
αcs
PSRR
channel separation
power supply rejection ratio
100
fripple = 1 kHz;
50
Vripple = 300 mV (p-p)
−
V
−
dB
−80 dB
−30 dB
−
dB
−
dB
−
dB
−
mV
−
dB
−85 dB
−
dB
−
dB
−
dB
−
dB
Notes
1. The input voltage can be up to 2 V (RMS) when the current through the ADC input pin is limited to approximately
1 mA by using a series resistor.
2. The input voltage to the ADC is inversely proportional with the supply voltage.
3. The output voltage of the UDA1344TS differs from the output voltage of the UDA1340M.
4. The output of the DAC scales proportionally with the supply voltage.
2001 Jun 29
18