CS42L55 Datasheet, PDF (19/73 Pages) Cirrus Logic – Ultra Low Power, Stereo CODEC w/Class H Headphone Amp

CS42L55
POWER SUPPLY REJECTION (PSRR) CHARACTERISTICS
Test Conditions (unless otherwise specified): Connections to the CS42L55 are shown in the “Typical Connection Diagram” on
page 10; GND = AGND = 0 V; all voltages with respect to ground.
Parameters
Min
Typ
Max Units
PSRR with 100 mVpp, 1 kHz signal (Note 20)
PGA to ADC -
55
-
dB
ADC ^-
50
-
dB
PGA to HP & Line Amps -
50
-
dB
DAC to HP & Line Amps ^-
50
-
dB
PSRR with 100 mVpp, 60 Hz signal (Note 20)
PGA to ADC (Note 21) ^-
35
-
dB
ADC -
25
-
dB
PGA to HP & Line Amps ^-
50
-
dB
DAC to HP & Line Amps ^-
60
-
dB
Notes:
20. 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.
21. The PGA is biased with VQ, created by a resistor divider from the VA supply.
DIGITAL INTERFACE SPECIFICATIONS & CHARACTERISTICS
Parameters (Note 22)
Input Leakage Current
Input Capacitance
1.8 V - 3.3 V Logic
High-Level Output Voltage (I_OH = -100 μA)
Low-Level Output Voltage (I_OL = 100 μA)
High-Level Input Voltage
Low-Level Input Voltage
HPDETECT Input
High-Level Input Voltage
Low-Level Input Voltage
Symbol
Min
I_in
-
-
V_OH
V_OL
VL = 1.65 V
V_IH
VL = 1.8 V
VL = 2.0 V
VL > 2.0 V
V_IL
HPDV_IH
HPDV_IL
VL - 0.2
-
0.83•VL
0.76•VL
0.68•VL
0.65•VL
-
0.65•VA
-
Max
±10
10
-
0.2
-
-
-
-
0.30•VL
-
0.35•VA
22. See “I/O Pin Characteristics” on page 9 for serial and control port power rails.
VCP
2.2 µF
VA
0.1 µF
VLDO
0.1 µF
VL
GND/AGND
0.1 µF
1Ω
1Ω
1Ω
1Ω
Power Supply
+
-
+
-
Voltmeter
+
-
+
-
Note: Current is derived from the voltage drop across
a 1 Ω resistor in series with each supply input.
Figure 8. Power Consumption Test Configuration
Units
μA
pF
V
V
V
V
V
V
DS773F1
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