ELECTRICAL CHARACTERISTICS: ADC Characteristics
www.ti.com ......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
All specifications at TA = +25°C, VCCAD1 = VCCAD2 = VCCDA1 = VCCDA2 = 5 V, VDD1 = VDD2 = 3.3 V, fS = 48 kHz,
SCKI = 512 fS, 24-bit data, Sampling Mode = Auto for ADC and DAC, and Interface Mode = Slave for ADC and DAC, unless
otherwise noted.
PCM3168A, PCM3168A-Q1
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ADC CHARACTERISTICS
Resolution
16
24
Bits
0.2 ×
VIN = 0 dB, Single-ended
VRMS
VCCAD1
Full-scale input voltage
0.4 ×
VIN = 0 dB, Differential
VRMS
VCCAD1
0.5 ×
Center voltage
V
VCCAD1
Input impedance
45
k
Common-mode rejection ratio
80
dB
DC ACCURACY
Gain mismatch channel-to-channel
Full-scale input, VIN
±2.0
±6
% of FSR
Gain error
Full-scale input, VIN
±2.0
±6
% of FSR
Bipolar zero error
High-pass filter bypass, VIN
±1.0
% of FSR
DYNAMIC PERFORMANCE(1)(2)
fS = 48 kHz, Differential
–93
–87
dB
fS = 96 kHz, Differential
–93
dB
THD+N, VIN = –1 dB
fS = 48 kHz, Single-ended
–93
dB
fS = 96 kHz, Single-ended
–93
dB
fS = 48 kHz, A-weighted, differential
100
107
dB
fS = 96 kHz, A-weighted, differential
107
dB
fS = 48 kHz, A-weighted,
Dynamic range
104
dB
single-ended
fS = 96 kHz, A-weighted,
104
dB
single-ended
fS = 48 kHz, A-weighted, differential
100
107
dB
fS = 96 kHz, A-weighted, differential
107
dB
fS = 48 kHz, A-weighted,
S/N ratio
104
dB
single-ended
fS = 96 kHz, A-weighted,
104
dB
single-ended
fS = 48 kHz, Differential
98
104
dB
fS = 96 kHz, Differential
104
dB
Channel separation
(between one channel and others)
fS = 48 kHz, Single-ended
101
dB
fS = 96 kHz, Single-ended
101
dB
(1)
In differential mode at VINx± pin, fIN = 1 kHz, using Audio Precision System II, RMS mode with 20-kHz low-pass filter and 400-Hz
high-pass filter.
(2)
fS = 48 kHz : SCKI = 512 fS (single), fS = 96 kHz : SCKI = 256 fS (dual), fS = 192 kHz : SCKI = 128 fS (quad).
Copyright 2008, Texas Instruments Incorporated
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