Cirrus-logic CS42L73 User Manual Page 26
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26 DS882F1
CS42L73
MIC BIAS CHARACTERISTICS
Test Conditions (unless otherwise specified): Connections to the CS42L73 are shown in the “Typical Connection Diagram” on
page 17; GND = AGND = PGND = CPGND = DGND = 0 V; all voltages are with respect to ground (GND); VA = 1.80 V, VP =
3.70 V; T
A
= +25 C; I
OUT
= 500 A; only one bias output is powered up at a time; VP_MIN = 1b, MIC_BIAS_CTRL = 1b.
Notes:
27. The output voltage includes attenuation due to the Mic Bias Output Resistance (R
OUT
).
28. Specifies use limits for the normal operation and MIC2 short conditions.
29. Dropout Voltage indicates the point where an output’s voltage starts to vary significantly with reductions to its supply
voltage. When the VP supply voltage drops below the programmed MIC2_BIAS output voltage plus the Dropout Volt-
age, the MIC2_BIAS output voltage will progressively decrease as its supply decreases. Dropout Voltage is measured
by reducing the VP supply until MIC2_BIAS drops 10 mV from its initial voltage with the default typical test condition VP
voltage (= 3.80 V from table heading above). The difference between the VP supply voltage and the MIC2_BIAS voltage
at this point is the dropout voltage. For instance, if the initial MIC2_BIAS output is 2.86 V when VP = 3.80 V and VP =
3.19 V when MIC2_BIAS drops to 2.85 V (-10mV), the Dropout Voltage is 340 mV (3.19 V – 2.85 V).
Parameters (Note 2) Min Typ Max Units
MIC1_BIAS and MIC2_BIAS Characteristics
Output Voltage (Note 27) MIC_BIAS_CTRL = 0b
MIC_BIAS_CTRL = 1b
1.85
2.59
2.00
2.75
2.15
2.89
V
V
DC Output Current (I
OUT
) Per output
(Note 28) Total for both outputs
-
-
-
-
3.0
5.0
mA
mA
Output Resistance (R
OUT
)
-35-
Dropout Voltage (Note 29)
- - 340 mV
PSRR with 100 mV
PP
signal AC-coupled to VA supply
217 Hz
1 kHz
20 kHz
-
-
-
105
100
90
-
-
-
dB
dB
dB
PSRR with 100 mV
PP
signal AC-coupled to VP supply
VP_MIN = 0b, VP = 3.10 V (Note 3) 217 Hz
1 kHz
20 kHz
PSRR with 1 V
PP
signal AC-coupled to VP supply
VP_MIN = 1b, VP = 3.70 V 217 Hz
1 kHz
20 kHz
-
-
-
-
-
-
90
90
70
110
105
90
-
-
-
-
-
-
dB
dB
dB
dB
dB
dB
- 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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