Cirrus-logic CS42L73 User Manual Page 24
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24 DS882F1
CS42L73
STEREO-ADC AND DUAL-DIGITAL-MIC DIGITAL FILTER
CHARACTERISTICS
Test Conditions (unless otherwise specified): Fs = 48 kHz (Note 10), f
DMIC_SCLK
= 3.072 MHz (Note 19).
Notes:
19. Refer to section “Digital Microphone (DMIC) Interface” on page 60 for a description of how the digital mic shift clock
frequency (f
DMIC_SCLK
) relates to the CS42L73‘s internal master clock rate.
20. Responses are clock-dependent and will scale with Fs. Note that the response plots (Figures 48 to 52 on pages 127 and
128) have been normalized to Fs and can be denormalized by multiplying the X-axis scale by Fs.
21. Measurement Bandwidth is from Stopband to 3 Fs.
22. High-pass filter is applied after low-pass filter.
Parameters (Note 2) Min Typ Max Units
Low-Pass Filter Characteristics (Note 20)
Frequency Response (20 Hz to 20 kHz)
-0.07 - +0.02 dB
Passband to -0.05 dB corner
to -3.0 dB corner
-
-
0.41
0.49
-
-
Fs
Fs
Stopband (Note 21)
0.60 - - Fs
Stopband Attenuation
33 - - dB
Total Input Path Digital Filter Group Delay
- 4.3/Fs - s
High-Pass Filter Characteristics (Note 20) (Note 22)
Passband to -3.0 dB corner
to -0.05 dB corner
-
-
4.10x10
-5
3.57x10
-4
-
-
Fs
Fs
Passband Ripple
- - 0.01 dB
Phase Deviation @ 20 Hz
-5.30-Deg
Filter Settling Time (input signal goes to 95% of its final value)
- 12.2x10
3
/Fs - s
-60 dBFS,
1 kHz
0.1 µF
MICx
MICx_REF
100
MICx_BIAS
2.21 k
0.1 µF
100
2.21 k
1.0 µF
Figure 2. MICx Dynamic Range Test Configuration
100 mV
PP
,
25 Hz
100
1 F
LINEINx or
MICy
LINEINx_REF
or MICy_REF
Figure 3. Analog Input CMRR Test Setup
0.1 µF
LINEINx or MICx
LINEIN_REF or MICx_REF
100
300 mV
PP,
1 kHz
0.1 µF
100
Figure 4. LINEIN_REF/MICx_REF Input Voltage Test Setup
- Product Overview 1
- Ultralow Power Consumption 1
- Applications 1
- System Features 1
- General Description 3
- TABLE OF CONTENTS 4
- LIST OF FIGURES 9
- LIST OF TABLES 10
- 12 DS882F1 12
- DS882F1 13 13
- 1.3 Pin/Ball Descriptions 14
- DS882F1 15 15
- 2. TYPICAL CONNECTION DIAGRAM 17
- ABSOLUTE MAXIMUM RATINGS 20
- DC ELECTRICAL CHARACTERISTICS 21
- 22 DS882F1 22
- CHARACTERISTICS 24
- MIC BIAS CHARACTERISTICS 26
- --70-60dB 27
- 0.73•VA 0.79•VA 0.85•VA V 27
- Test Load 28
- Measurement 28
- FILTER CHARACTERISTICS 33
- POWER CONSUMPTION 34
- DMIC_SCLK 37
- = “s” or “m” 38
- Repeated 40
- 4. APPLICATIONS 41
- 4.5 Class H Amplifier 44
- 4.5.1 Power Control Options 44
- 48 DS882F1 48
- 4.5.3 Efficiency 49
- 4.6 DAC Limiter 49
- LIMRRATEx[2:0] 50
- LIMARATEx[2:0] 50
- 4.8 Serial Ports 51
- 4.8.1 Power Management 51
- 4.8.2 I/O 51
- 4.8.3 High-impedance Mode 52
- 4.8.4 Master and Slave Timing 52
- 4.8.4.1 SCLK = MCLK Modes 53
- 4.8.6 Formats 54
- 4.8.6.1 I²S Format 55
- 4.8.6.2 PCM Format 55
- 4.8.7 Mono/Stereo 57
- 4.8.8 Data Bit Depths 57
- 4.8.8.1 I²S Format Bit Depths 57
- 4.8.8.2 PCM Format Bit Depths 58
- 4.10 Input Paths 59
- DMIC_CLK 60
- 4.11 Digital Mixer 61
- 62 DS882F1 62
- 4.11.1 Mono and Stereo Paths 63
- 4.15 Interrupts 70
- 4.16 Control Port Operation 71
- 4.16.1 I²C Control 71
- 7 6 5 4 3 2 1 0 72
- 4.17 Fast Start Mode 73
- SPKLINEOUT 74
- EARSPKOUT 74
- Normal audioNo audio 75
- Clipped/Ramping audio 75
- 5. REGISTER QUICK REFERENCE 76
- DS882F1 77 77
- 78 DS882F1 78
- DS882F1 79 79
- 80 DS882F1 80
- (Read Only) 80
- 6. REGISTER DESCRIPTION 81
- 6.12.2 ASP Sample Rate 90
- 6.13.1 ASP Master/Slave Mode 90
- 6.14.5 VSP SDIN Location 92
- 6.15.1 VSP Master/Slave Mode 92
- 6.16.1 VSP Sample Rate 93
- 6.16.2 XSP Sample Rate 93
- 6.17.1 Digital Swap/Mono 94
- 6.17.2 Input Path Channel B=A 94
- 6.17.4 PGA Soft-Ramp 95
- 6.17.5 Analog Zero Cross 95
- 6.17.6 Digital Soft-Ramp 96
- 6.19.1 Mic PREAMP x Volume 98
- 6.19.2 PGAx Volume 98
- DS882F1 99 99
- DS882F1 103 103
- 104 DS882F1 104
- 76543210 110
- (Address 2Eh) 112
- 6.44.3 ALCx Soft-Ramp Disable 116
- 6.45.3 Mixer Soft-Ramp Enable 117
- 118 DS882F1 118
- DS882F1 119 119
- 120 DS882F1 120
- DS882F1 121 121
- 7. PCB LAYOUT CONSIDERATIONS 125
- 8. PERFORMANCE DATA 126
- DS882F1 127 127
- 128 DS882F1 128
- 8.3 Core Circuitry Attributes 129
- 8.3.1 ASRC Attributes 129
- 8.3.1.1 Response 129
- 8.3.1.2 Group Delay 130
- 8.3.1.3 Lock Time 130
- DS882F1 131 131
- 8.4.2 DAC HPF Response 132
- 8.4.4 Startup Times 133
- 9. PARAMETER DEFINITIONS 134
- 10.PACKAGE DIMENSIONS 135
- BUMP SIDESIDE VIEW 136
- TOP SIDE 136
- 11.THERMAL CHARACTERISTICS 137
- 12.ORDERING INFORMATION 137
- 13.REFERENCES 137
- 14.REVISION HISTORY 138
- DS882F1 139 139
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