Datasheet

ELECTRICAL CHARACTERISTICS
PCM1795
www.ti.com
........................................................................................................................................................................................................ SLES248 MAY 2009
All specifications at T
A
= +25 ° C, V
CC
1 = V
CC
2L = V
CC
2R = 5 V, V
DD
= 3.3 V, f
S
= 48 kHz, system clock = 256 f
S
, and 32-bit
data, unless otherwise noted.
PCM1795 DB
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
RESOLUTION
Resolution 32 Bits
DATA FORMAT (PCM Mode)
Audio data interface format Standard, I
2
S, left-justified
Audio data bit length 16-, 24-, 32-bit selectable
Audio data format MSB first, twos complement
f
S
Sampling frequency 10 200 kHz
System clock frequency 128, 192, 256, 384, 512, 768 f
S
DATA FORMAT (DSD Mode)
Audio data interface format DSD (direct stream digital)
Audio data bit length 1 Bit
f
S
Sampling frequency 2.8224 MHz
System clock frequency 2.8224 11.2986 MHz
DIGITAL INPUT/OUTPUT
TTL
Logic family
compatible
V
IH
2 VDC
Input logic level
V
IL
0.8 VDC
I
IH
V
IN
= V
DD
10 µ A
Input logic current
I
IL
V
IN
= 0 V 10 µ A
V
OH
I
OH
= 2 mA 2.4 VDC
Output logic level
V
OL
I
OL
= 2 mA 0.4 VDC
DYNAMIC PERFORMANCE (PCM MODE)
(1) (2)
f
S
= 48 kHz 0.0005 0.001 %
THD+N at V
OUT
= 0 dB f
S
= 96 kHz 0.001 %
f
S
= 192 kHz 0.0015 %
EIAJ, A-weighted, f
S
= 48 kHz 120 123 dB
Dynamic range EIAJ, A-weighted, f
S
= 96 kHz 123 dB
EIAJ, A-weighted, f
S
= 192 kHz 123 dB
EIAJ, A-weighted, f
S
= 48 kHz 120 123 dB
Signal-to-noise ratio EIAJ, A-weighted, f
S
= 96 kHz 123 dB
EIAJ, A-weighted, f
S
= 192 kHz 123 dB
f
S
= 48 kHz 116 119 dB
Channel separation f
S
= 96 kHz 118 dB
f
S
= 192 kHz 117 dB
Level linearity error V
OUT
= 120 dB ± 1 dB
(1) Filter condition:
THD+N: 20-Hz high-pass filter (HPF), 20-kHz AES17 low-pass filter (LPF)
Dynamic range: 20-Hz HPF, 20-kHz AES17 LPF, A-weighted
Signal-to-noise ratio: 20-Hz HPF, 20-kHz AES17 LPF, A-weighted
Channel separation: 20-Hz HPF, 20-kHz AES17 LPF
Analog performance specifications are measured using the System Two™ Cascade audio measurement system by Audio Precision™ in
the averaging mode.
(2) Dynamic performance and dc accuracy are specified at the output of the post-amplifier as shown in Figure 52 .
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