User guide

DS686F1 11
CS4270
ADC ANALOG CHARACTERISTICS
Test Conditions (unless otherwise specified): VD = VL = 3.3 V, DGND = AGND = 0 V; T
A
= 25° C; 997 Hz Input
Sine Wave. Figure 15 on page 26 shows the test circuit; Fs = 48/96/192 kHz; Synchronous Mode; Measurement
Bandwidth 10 Hz to 20 kHz.
Note: 8. Referred to the typical full-scale input voltage.
Dynamic Performance
VA = 5 V VA = 3.3 V
Single-Speed Mode Fs = 48 kHz
Symbol Min Typ Max Min Typ Max Unit
Dynamic Range A-weighted
unweighted
99
96
105
102
-
-
96
93
102
99
-
-
dB
dB
Total Harmonic Distortion + Noise (Note 8)
-1 dB
-20 dB
-60 dB
THD+N
-
-
-
-95
-82
-42
-90
-
-
-
-
-
-92
-79
-39
-87
-
-
dB
dB
dB
Double-Speed Mode Fs = 96 kHz
Dynamic Range A-weighted
unweighted
40 kHz bandwidth unweighted
99
96
-
105
102
99
-
-
-
96
93
-
102
99
96
-
-
-
dB
dB
dB
Total Harmonic Distortion + Noise (Note 8)
-1 dB
-20 dB
-60 dB
40 kHz bandwidth unweighted
THD+N
-
-
-
-
-95
-82
-42
-93
-90
-
-
-
-
-
-
-
-92
-79
-39
-89
-87
-
-
-
dB
dB
dB
dB
Quad-Speed Mode Fs = 192 kHz
Dynamic Range A-weighted
unweighted
40 kHz bandwidth unweighted
99
96
-
105
102
99
-
-
-
96
93
-
102
99
96
-
-
-
dB
dB
dB
Total Harmonic Distortion + Noise (Note 8)
-1 dB
-20 dB
-60 dB
40 kHz bandwidth -1 dB
THD+N
-
-
-
-
-95
-82
-42
-93
-90
-
-
-
-
-
-
-
-92
-79
-39
-89
-87
-
-
-
dB
dB
dB
dB
Dynamic Performance - All Sampling Speed Modes
Parameter
Min
Typ Max Unit
Interchannel Isolation - 100 - dB
DC Accuracy
Interchannel Gain Mismatch - 0.1 - dB
Gain Error -3 - +3 %
Gain Drift - 100 - ppm/°C
Analog Input Characteristics
Full-Scale Input Voltage 0.53*VA 0.56*VA 0.58*VA Vpp
Input Impedance - 300 - k