CRD4525 Просмотр технического описания (PDF) - Cirrus Logic
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CRD4525 Datasheet PDF : 91 Pages
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CS4525
ANALOG INPUT CHARACTERISTICS
Test Conditions (unless otherwise specified): Input Signal: 1 kHz sine wave through the recommended passive
input filter shown in Figure 27 on page 56; Sample Frequency = 48 kHz, 10 Hz to 20 kHz Measurement Bandwidth.
Power outputs in power-down state (PDnOut1 = 1, PDnOut2 = 1, PDnOut3/4 = 1).
Parameter
Analog In to ADC
Dynamic Range (Note 4)
Total Harmonic Distortion + Noise
DC Accuracy
Interchannel Gain Mismatch
Gain Drift
Input
Interchannel Isolation
Full-scale Input Voltage
Input Impedance
Min
A-weighted
90
unweighted
87
-1 dB
-
-20 dB
-
-60 dB
-
-
-
-
1.96
(Note 5)
40
Typ
95
92
-88
-75
-35
0.1
±100
90
2.18
-
Max
-
-
-82
-
-
-
-
-
2.40
-
Unit
dB
dB
dB
dB
dB
dB
ppm/°C
dB
Vpp
kΩ
Notes: 4. Referred to the typical full-scale voltage.
5. Measured between AINx and AGND.
ADC DIGITAL FILTER CHARACTERISTICS
Parameter
Passband (Frequency Response) (Note 6)
Passband Ripple
Stopband
Stopband Attenuation
Total Group Delay
High-Pass Filter Characteristics
Frequency Response
Phase Deviation
Passband Ripple
Filter Settling Time
Min
to -0.1 dB corner 0
-0.09
(Note 6) 0.6677
48.4
-
Typ
-
-
-
-
2.7/Fs
Max
0.4948
0
-
-
-
Unit
Fs
dB
Fs
dB
s
-3.0 dB -
-0.13 dB -
20 Hz -
-
-
3.7
-
Hz
24.2
-
Hz
10
-
Deg
-
0.17
dB
105/Fs
0
s
Notes: 6. Filter response is clock dependent and scales with the ADC sampling frequency (Fs). With a
27.000 MHz or 24.576 MHz XTAL/SYS_CLK, Fs is equal to the applied clock divided by 512. With an
18.432 MHz XTAL/SYS_CLK, Fs is equal to the applied clock divided by 384.
DS726A1
19
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