CS42L55 Datasheet, PDF (12/73 Pages) Cirrus Logic – Ultra Low Power, Stereo CODEC w/Class H Headphone Amp

CS42L55
ANALOG INPUT CHARACTERISTICS
Test Conditions (unless otherwise specified): Connections to the CS42L55 are shown in the Figure 1. "Typical Connection Dia-
gram" on page 10; Input is a 1 kHz sine wave through the passive input filter, PGA = 0 dB; All Supplies = VA;
GND = AGND = 0 V; T_A = +25°C; Measurement bandwidth is 20 Hz to 20 kHz. Sample Frequency = 48 kHz.
Parameter (Note 4)
Analog In to ADC (PGA bypassed)
Dynamic Range
A-weighted
unweighted
Total Harmonic Distortion + Noise
-1 dBFS
-20 dBFS
-60 dBFS
Analog In to PGA to ADC
Dynamic Range
PGA Setting: 0 dB
A-weighted
unweighted
PGA Setting: +12 dB
A-weighted
unweighted
Total Harmonic Distortion + Noise
PGA Setting: 0 dB
-1 dBFS
-60 dBFS
PGA Setting: +12 dB
-1 dBFS
Common Mode Rejection (Note 5)
DC Accuracy
Interchannel Gain Mismatch
Gain Drift
Offset Error
(Note 6)
Input
Interchannel Isolation (1 kHz)
HP Amp to Analog Input Isolation
R_L = 10 kΩ
R_L = 16 Ω
Full-scale Input Voltage
ADC
PGA (0 dB)
PGA (+12 dB)
Input Impedance (Note 7)
ADC
PGA
VA = 2.5 V
Min
Typ Max
89
95
-
86
92
-
-
-85
-79
-
-72
-
-
-32
-26
88
94
-
85
91
-
81
87
-
78
84
-
-
-87
-81
-
-31
-25
-
-83
-77
-
40
-
-
0.2
-
-
±100
-
-
352
-
-
90
-
-
90
-
-
83
-
0.76•VA
0.78•VA
-
-
0.80•VA
0.82•VA
0.198•VA
60
40
0.84•VA
0.86•VA
-
-
VA = 1.8 V
Min
Typ
Max
86
92
-
83
89
-
-
-85
-79
-
-69
-
-
-29
-23
85
91
-
82
88
-
78
84
-
75
81
-
-
-85
-79
-
-28
-22
-
-81
-75
-
40
-
-
0.2
-
-
±100
-
-
352
-
-
90
-
-
90
-
-
83
-
0.76•VA
0.78•VA
-
-
0.80•VA
0.82•VA
0.198•VA
60
40
0.84•VA
0.86•VA
-
-
Unit
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
ppm/°C
LSB
dB
dB
dB
Vpp
Vpp
Vpp
kΩ
kΩ
4. Referred to the typical full-scale voltage. Applies to all THD+N and Dynamic Range values in the table.
5. See test figure shown below.
6. SDOUT Code with HPFx=1;HPFRZx=0.
7. Measured between AINxx and AGND.
100 mV_PP,
25 Hz
100 Ω _{1 μF}
AINxA
AINxREF
Figure 2. CMRR Test Configuration
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DS773F1