Datasheet

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ELECTRICAL CHARACTERISTICS: DIGITAL and DYNAMIC PERFORMANCE
PCM4222
SBAS399A – OCTOBER 2006 – REVISED MARCH 2007
All specifications are at T
A
= +25 ° C, VCC1 = VCC2 = +4.0V and VDD = +3.3V unless otherwise noted.
PCM4222
PARAMETER CONDITIONS MIN TYP MAX UNITS
DIGITAL I/O CHARACTERISTICS
(Applies to all digital I/O pins)
High-level input voltage, V
IH
0.7 × VDD VDD V
Low-level input voltage, V
IL
0 0.3 × VDD V
High-level input current, I
IH
1 10 µ A
Low-level input current, I
IL
1 10 µ A
High-level output voltage, V
OH
I
O
= –2mA 0.8 × VDD VDD V
Low-level output voltage, V
OL
I
O
= +2mA 0 0.2 × VDD V
Input capacitance, C
IN
3 pF
PCM OUTPUT SAMPLING RATE, f
S
Normal mode 8 54 kHz
Double Speed mode 54 108 kHz
Quad Speed mode 108 216 kHz
DSD OUTPUT RATE, f
DSD
64x output mode 0.512 3.456 MHz
128x output mode 1.024 6.912 MHz
MULTI-BIT MODULATOR OUTPUT RATE, f
MOD
1.024 6.912 MHz
MASTER CLOCK INPUT
Normal mode, MCKI = 256f
S
2.048 13.824 MHz
Double Speed mode, MCKI = 128f
S
6.912 13.824 MHz
Quad Speed mode, MCKI = 64f
S
6.912 13.824 MHz
DSD 64x output mode, MCKI = 4 × f
DSD
2.048 13.824 MHz
DSD 128x output mode, MCKI = 2 × f
DSD
2.048 13.824 MHz
Multi-bit modulator output, MCKI = 2 × f
MOD
2.048 13.824 MHz
DYNAMIC PERFORMANCE
(1)
PCM output, Normal mode, f
S
= 48kHz BW = 22Hz to 20kHz
Total harmonic distortion + noise (THD+N) f = 997Hz, –1dB input –108 –101 dB
f = 997Hz, –20dB input –100 dB
f = 997Hz, –60dB input –61 dB
Dynamic range, no weighting f = 997Hz, –60dB input 121 dB
Dynamic range, A-weighted f = 997Hz, –60dB input 118 123 dB
Channel separation/interchannel isolation f = 10kHz, –1dB input 115 135 dB
PCM output, Double Speed mode, f
S
= 96kHz BW = 22Hz to 40kHz
Total harmonic distortion + noise (THD+N) f = 997Hz, –1dB input –108 dB
f = 997Hz, –20dB input –98 dB
f = 997Hz, –60dB input –58 dB
Dynamic range, no weighting f = 997Hz, –60dB input 118 dB
Dynamic range, A-weighted f = 997Hz, –60dB input 123 dB
Channel separation/interchannel isolation f = 10kHz, –1dB input 135 dB
(1) Typical PCM output performance is measured and characterized with an Audio Precision SYS-2722 192kHz test system and a
PCM4222EVM evaluation module using the bandwidth and weighting settings as noted in the Conditions column. Typical DSD and
Multi-Bit output performance is characterized using an Audio Precision SYS-2722 analog generator, a PCM4222EVM evaluation
module, and a separate data acquisition system for collection and signal processing. The bandwidth and input settings used for these
measurements are noted in the Conditions column. Master mode operation is utilized for all modes, with the master clock input
frequency (MCKI) set to 12.288MHz for PCM and MBM output modes, and 11.2896MHz for DSD output mode.
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