PCM1808
www.ti.com
SLES177A–APRIL 2006–REVISED AUGUST 2006
ELECTRICAL CHARACTERISTICS
All specifications at TA = 25°C, VCC = 5 V, VDD = 3.3 V, master mode, fS = 48 kHz, system clock = 512 fS, 24-bit data, unless
otherwise noted
PARAMETER
Resolution
DATA FORMAT
TEST CONDITIONS
MIN
TYP
MAX
UNIT
24
Bits
Audio data interface format
Audio data bit length
Audio data format
I2S, left-justified
24
Bits
kHz
MHz
MSB-first, 2s complement
fS
Sampling frequency
8
2.048
3.072
4.096
48
12.288
18.432
24.576
96
24.576
36.864
49.152
256 fS
384 fS
512 fS
System clock frequency
INPUT LOGIC
(1)
VIH
2
0
2
0
VDD
0.8
(1)
VIL
Input logic level
VDC
µA
(2)(3)
(2)(3)
VIH
5.5
VIL
0.8
(2)
IIH
IIL
IIH
IIL
VIN = VDD
VIN = 0 V
VIN = VDD
VIN = 0 V
±10
±10
100
±10
(2)
Input logic current
(1)(3)
(1)(3)
65
OUTPUT LOGIC
(4)
VOH
IOUT = –4 mA
IOUT = 4 mA
2.8
Output logic level
VDC
(4)
VOL
DC ACCURACY
Gain mismatch, channel-to-channel
0.5
±1
±3
±3 % of FSR
±6 % of FSR
Gain error
(5)
DYNAMIC PERFORMANCE
VIN = –0.5 dB, fS = 48 kHz
VIN = –0.5 dB, fS = 96 kHz
VIN = –60 dB, fS = 48 kHz
VIN = –60 dB, fS = 96 kHz
fS = 48 kHz, A-weighted
–93
–87
–37
–39
99
–87
(6)
THD + N
Total harmonic distortion + noise
dB
(6)
95
95
93
Dynamic range
dB
dB
dB
(6)
fS = 96 kHz, A-weighted
fS = 48 kHz, A-weighted
fS = 96 kHz, A-weighted
fS = 48 kHz
101
99
S/N
Signal-to-noise ratio
Channel separation
(6)
101
97
(6)
fS = 96 kHz
91
(1) Pins 7, 8: LRCK, BCK (Schmitt-trigger input, with 50-kΩ typical pulldown resistor, in slave mode)
(2) Pin 6: SCKI (Schmitt-trigger input, 5-V tolerant)
(3) Pins 10–12: MD0, MD1, FMT (Schmitt-trigger input, with 50-kΩ typical pulldown resistor, 5-V tolerant)
(4) Pins 7–9: LRCK, BCK (in master mode), DOUT
(5) Analog performance specifications are tested using a System Two™ audio measurement system by Audio Precision™ with 400-Hz HPF
and 20-kHz LPF in RMS mode.
(6) fS = 96 kHz, system clock = 256 fS.
3
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