Datasheet

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SBAS342B − DECEMBER 2004 − REVISED APRIL 2006
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3
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, all characteristics are measured with T
A
= +25°C, V
CC
= +5V, and V
DD
= +3.3V. System clock frequency is set to
24.576 MHz. Device is operated in Slave mode.
PCM4201
PARAMETER CONDITIONS MIN TYP MAX UNITS
RESOLUTION 24 Bits
AUDIO DATA FORMAT
Format Two’s complement, MSB first data Left-Justified / DSP Compatible
Word length 24 Bits
DIGITAL I/O
Input logic level
V
IH
0.7 x V
DD
V
DD
V
Input logic level
V
IL
0 0.3 x V
DD
V
Output logic level
V
OH
I
OH
= −2mA 0.8 x V
DD
V
Output logic level
V
OL
I
OL
= +2mA 0.2 x V
DD
V
Input current
I
IH
V
IN
= V
DD
+10 µA
Input current
I
IL
V
IN
= 0V −10 µA
Input current
(1)
I
IH
V
IN
= V
DD
+25 µA
Input current
(1)
I
IL
V
IN
= 0V −25 µA
DIGITAL SWITCHING
Normal speed, low power 8 54 kHz
Output sampling frequency f
S
Normal speed, high performance 8 54 kHz
Output sampling frequency
f
S
Double speed 54 108 kHz
System clock duty cycle 45 50 55 %
System clock frequency 2.048 27.65 MHz
AUDIO SERIAL-PORT TIMING
Delay from FSYNC rising to BCK rising t
DBK
5 ns
Delay from BCK rising to FSYNC rising t
DLK
5 ns
BCK high pulse width t
BCKH
72 ns
BCK low pulse width t
BCKL
72 ns
Data setup time t
S
10 ns
Data hold time t
H
10 ns
ANALOG INPUTS
Input voltage, full-scale range (FSR) Differential input 5.0 V
PP
Input impedance Per analog input pin 15 kΩ
Common-mode rejection 100 dB
DC PERFORMANCE
Output offset error High-pass filter disabled ±4 % of FSR
Gain error ±4 % of FSR
(1)
Applies to RATE (pin 5) and S/M
(pin 6) inputs.
(2)
All typical dynamic performance specifications were measured using an Audio Precision System Two Cascade or Cascade Plus test system and a PCM4201EVM
evaluation module. For Normal Speed operation, the measurement bandwidth is limited using the Audio Precision 22Hz high-pass filter and 20kHz low-pass filter.
For Double Speed mode, the measurement bandwidth is limited using the Audio Precision 22Hz high-pass filter and a user-defined 40kHz low-pass filter (the
f
S
/2 low pass filter may be utilized with similar results). All A-weighted measurements are made using the Audio Precision A-weighting filter in combination with
the filters previously noted here. Minimum and maximum dynamic performance limits are based upon the capability of the production test solution.