Cirrus Logic CS42L51 - Manual (Page 14)

14 DS679F1
CS42L51
ANALOG INPUT CHARACTERISTICS (AUTOMOTIVE - DNZ)
(Test Conditions (unless otherwise specified): Input sine wave (relative to full scale): 1 kHz through passive input
filter; Measurement Bandwidth is 10 Hz to 20 kHz unless otherwise specified. Sample Frequency = 48 kHz)
4. Measured with DAC delivering full-scale output power into 16
Ω.
VA = 2.5 V (nominal) VA = 1.8 V (nominal)
Parameter (Note 5) Min Typ Max Min Typ Max Unit
Analog In to ADC
Dynamic Range A-weighted
unweighted
91
78 99
96 -
- 88
85 96
93 -
- dB
dB
Total Harmonic Distortion + Noise -1 dBFS
-20 dBFS
-60 dBFS
-
-
- -86
-76
-36 -78
-
-
-
-
- -84
-73
-33 -76
-
-
dB
dB
dB
Analog In to PGA to ADC
Dynamic Range
PGA Setting: 0 dB A-weighted
unweighted
90
87 98
95 -
- 87
84 95
92 -
- dB
dB
PGA Setting: +12 dB A-weighted
unweighted
83
80 91
88 -
- 80
77 88
85 -
- dB
dB
Total Harmonic Distortion + Noise
PGA Setting: 0 dB -1 dBFS
-60 dBFS
-
- -88
-35 -80
-
-
- -86
-32 -78
-
dB
dB
PGA Setting: +12 dB -1 dBFS - -85 -77 - -83 -75 dB
Analog In to MIC Pre-Amp (+16 dB) to PGA to ADC
Dynamic Range
PGA Setting: 0 dB A-weighted
unweighted
-
- 86
83 -
- -
- 83
80 -
- dB
dB
Total Harmonic Distortion + Noise
PGA Setting: 0 dB -1 dBFS - -76 - - -74 - dB
Analog In to MIC Pre-Amp (+32 dB) to PGA to ADC
Dynamic Range
PGA Setting: 0 dB A-weighted
unweighted
-
- 78
74 -
- -
- 75
71 -
- dB
dB
Total Harmonic Distortion + Noise
PGA Setting: 0 dB -1 dBFS - -74 - - -71 - dB
Other Characteristics
DC Accuracy
Interchannel Gain Mismatch - 0.1 - - 0.1 - dB
Gain Drift - ±100 - - ±100 - ppm/°C
Offset Error SDOUT Code with HPF On - 352 - - 352 - LSB
Input
Interchannel Isolation - 90 - - 90 - dB
DAC Isolation (Note 4) - 70 - - 70 - dB
Full-scale Input Voltage ADC
PGA (0 dB)
MIC (+16 dB)
MIC (+32 dB)
0.74•VA
0.75•VA 0.78•VA
0.794•VA
0.129•VA
0.022•VA
0.82•VA
0.83•VA 0.74•VA
0.75•VA 0.78•VA
0.794•VA
0.129•VA
0.022•VA
0.82•VA
0.83•VA Vpp
Vpp
Vpp
Vpp
Input Impedance (Note 6) ADC
PGA
MIC
18
40
50 -
-
- -
-
- 18
40
50 -
-
- -
-
- k Ω
k Ω
k Ω