Philips Semiconductors
Preliminary specification
Economy audio CODEC for MiniDisc (MD)
home stereo and portable applications
UDA1341TS
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Digital output pins
VOH
VOL
HIGH-level output voltage
LOW-level output voltage
IOH = −2 mA
IOL = 2 mA
0.85VDDD
−
−
−
V
−
0.4
V
Analog-to-digital converter
VADCP
VADCN
Ro(ref)
Ri
positive reference voltage
negative reference voltage
Vref reference output resistance pin 28
−
VDDA
0.0
−
V
0.0
−
0.0
−
V
24
kΩ
input resistance
measured at 1 kHz
stand-alone mode
−
−
−
12.5
6.25
20
−
−
−
kΩ
kΩ
pF
double differential mode
Ci
input capacitance
Programmable gain amplifier (input channel 2)
Ri
input resistance
microphone mode
−
−
12.5
>1
−
−
kΩ
double differential mode
MΩ
Digital-to-analog converter
Ro
output resistance
maximum output current
load resistance
−
−
3
−
0.13
0.22
−
3.0
−
Ω
Io(max)
RL
(THD + N)/S < 0.1%
note 2
mA
kΩ
pF
−
CL
load capacitance
−
50
Reference voltage
Vref
reference voltage
with respect to VSSA
0.45VDDA 0.5VDDA 0.55VDDA
V
Notes
1. All power supply pins (VDD and VSS) must be connected to the same external power supply unit.
2. When higher capacitive loads (above 50 pF) must be driven then a resistor of 100 Ω must be connected in series
with the DAC output in order to prevent oscillations in the output operational amplifier.
1998 Dec 18
22
NXP [ NXP ]
