Datasheet

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SBAS327A − JUNE 2004 − REVISED SEPTEMBER 2004
www.ti.com
3
ELECTRICAL CHARACTERISTICS
Unless otherwise noted, all characteristics specified with T
A
= +25°C, V
CC
= +5V, V
DD
= +3.3V, system clock (SCKI) is 512f
S
for Single Rate
Sampling, 256f
S
for Dual Rate Sampling, or 128f
S
for Quad Rate Sampling. The device is operated in Master mode for all dynamic performance
measurements.
PCM4204
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
RESOLUTION 24 Bits
DATA FORMAT
Audio Data Formats (PCM) Left and Right Justified, I
2
S, TDM
Audio Data Word Length (PCM) 24 Bits
Binary Data Format (PCM) Two’s Complement Binary, MSB First
DSD Output Format and Word Length 1-Bit Data Bits
DIGITAL INPUT/OUTPUT
Input Logic Level V
IH
0.7 x V
DD
V
DD
V
V
IL
0 0.3 x V
DD
V
Output Logic Level V
OH
I
OH
= −2mA 0.8 x V
DD
V
DD
V
V
OL
I
OH
= +2mA 0 0.2 x V
DD
V
Input Leakage
Current
(1)
I
IH
V
IN
= V
DD
+1 +10 µA
I
IL
V
IN
= 0V −1 −10 µA
Input Leakage
Current
(2)
I
IH
V
IN
= V
DD
+35 +100 µA
I
IL
V
IN
= 0V −35 −100 µA
CLOCK FREQUENCIES
System Clock Frequency, f
SCKI
Single Rate Sampling Mode 6.144 38.4 MHz
Dual Rate Sampling Mode 12.8 38.4 MHz
Quad Rate Sampling Mode 12.8 38.4 MHz
Sampling Frequency, f
S
Single Rate Sampling Mode 24 54 kHz
Dual Rate Sampling Mode 54 108 kHz
Quad Rate Sampling Mode 108 216 kHz
ANALOG INPUTS
Full Scale Input Voltage Differential Input 6.0 V
PP
Average Input Impedance 3 kΩ
Common-mode Rejection 85 dB
DC SPECIFICATIONS
V
COM
12, V
COM
34 Output Voltage +2.5 V
V
COM
12, V
COM
34 Output Current 200 µA
(1)
Applies to the FMT0, FMT1, FMT2, S/M, FS0, FS1, FS2, HPFD, BCK, LRCK, SUB, DSDCLK, DSD1, DSD2, DSD3, DSD4, and SCKI pins.
(2)
Applies to the TEST and RST pins.
(3)
Typical performance is measured using an Audio Precision System Two Cascade or Cascade Plus test system. The measurement bandwidth
is limited using the Audio Precision 22Hz high-pass filter in combination with either a 20kHz low-pass filter for f
S
= 48kHz or a 40kHz low-pass
filter for f
S
= 96kHz and 192kHz. All A-weighted measurements are performed using the A-weighting filter in combination with the band limiting
filters already mentioned. The measurements are made with the RMS detector selected.
(4)
A 256f
S
system clock is used at final production test for f
S
= 48kHz measurements.
(5)
Typical DSD performance is measured using an Audio Precision System Two Cascade or Cascade Plus test system. The measurement
bandwidth is limited using the Audio Precision 22Hz high-pass filter in combination with a 20kHz low-pass filter. All A-weighted measurements
are performed using the A-weighting filter in combination with the band limiting filter already mentioned. The measurements are made with the
RMS detector selected. The 1-bit DSD data is converted to 24-bit linear PCM data for measurement using a PCM4204 configured for DSD input
mode.