CS42L56 查看數據表（PDF） - Cirrus Logic
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CS42L56 Datasheet PDF : 92 Pages
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CS42L56
DC CHARACTERISTICS
Test Conditions (unless otherwise specified): Connections to the CS42L56 are shown in the “Typical Connection Diagrams” on
page 11; GND = AGND = 0 V; all voltages with respect to ground.
Parameters
Min
Typ
Max Units
VHPFILT Characteristics (Note 27)
VCP Mode
+VHPFILT -
-VHPFILT -
VCP
-VCP
-
V
-
V
VCP/2 Mode
+VHPFILT
-
-VHPFILT -
VCP/2
-VCP/2
-
V
-
V
MIC BIAS Characteristics
Nominal Voltage
BIAS_LVL[1:0] = 00
-
BIAS_LVL[1:0] = 01
-
BIAS_LVL[1:0] = 10
-
BIAS_LVL[1:0] = 11
-
0.9•VA
0.8•VA
0.7•VA
0.6•VA
-
V
-
V
-
V
-
V
DC Output Current (Note 28)
-
-
1.22 mA
Power Supply Rejection Ratio (PSRR) @ 1 kHz
BIAS_LVL[1:0] = 00
-
45
-
dB
BIAS_LVL[1:0] = 01
-
50
-
dB
BIAS_LVL[1:0] = 10
-
50
-
dB
BIAS_LVL[1:0] = 11
-
50
-
dB
Misc. DC Filter Characteristics
FILT+
-
VQ
-
VDFILT
-
VA
VA/2
0.9
-
V
-
V
-
V
Power Supply Rejection Ratio (PSRR) Characteristics
PSRR with 100 mVpp, 1 kHz signal (Note 29)
PGA to ADC
-
47
-
dB
PGA (Pseudo Differential) to ADC
-
58
-
dB
ADC
-
57
-
dB
PGA to HP & Line Amps
-
44
-
dB
PGA (Pseudo Differential) to HP & Line Amps
-
54
-
dB
DAC to HP & Line Amps
-
56
-
dB
PSRR with 100 mVpp, 60 Hz signal (Notes 29, 30)
PGA to ADC -
35
-
dB
ADC
-
25
-
dB
PGA to HP & Line Amps
-
50
-
dB
DAC to HP & Line Amps
-
60
-
dB
Notes:
27. No load connected to HPOUTx and LINEOUTx.
28. VA = 2.71 V, BIAS_LVL[1:0] = 00, total equivalent external impedance to ground = 2 k.
29. Valid with the recommended capacitor values on FILT+ and VQ, no load on HP and Line. Increasing
the capacitance on FILT+ and VQ will also increase the PSRR.
30. The PGA is biased with VQ, created by a resistor divider from the VA supply. Increasing the capacitance
on FILT+ and VQ will also increase the PSRR at low frequencies. A 10 µF capacitor on VQ improves
the PSRR to 42 dB.
26
DS851F2
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