Dc electrical characteristics – Cirrus Logic CS42L52 User Manual
Page 22
22
DS680F2
CS42L52
3/1/13
DC ELECTRICAL CHARACTERISTICS
AGND = 0 V; All voltages with respect to ground.
17. Valid with the recommended capacitor values on FILT+ and VQ. Increasing the capacitance will also
increase the PSRR.
18. The PGA is biased with VQ, created from a resistor divider from the VA supply. Increasing the capaci-
tance on VQ will also increase the PSRR at low frequencies. A 10 µF capacitor on VQ improves the
PSRR to 42 dB.
DIGITAL INTERFACE SPECIFICATIONS AND CHARACTERISTICS
“I/O Pin Characteristics” on page 10
for serial and control port power rails.
Parameters
Min
Typ
Max
Units
VQ Characteristics
Nominal Voltage
Output Impedance
DC Current Source/Sink
-
-
-
0.5•VA
23
-
-
-
1
V
k
A
MIC BIAS Characteristics
Nominal Voltage
BIASLVL[2:0] = 000
BIASLVL[2:0] = 001
BIASLVL[2:0] = 010
BIASLVL[2:0] = 011
BIASLVL[2:0] = 100
BIASLVL[2:0] = 101
DC Output Current
Power Supply Rejection Ratio (PSRR)
1 kHz
-
-
-
-
-
-
-
-
0.5•VA
0.6•VA
0.7•VA
0.8•VA
0.83•VA
0.91•VA
-
50
-
-
-
-
-
-
1
-
V
V
V
V
V
V
mA
dB
Power Supply Rejection Ratio Characteristics
PSRR @1 kHz
PGA to ADC
ADC
DAC (HP and Line Amps)
-
-
-
44
60
60
-
-
-
dB
dB
dB
PSRR @60 Hz
PGA to ADC
ADC
DAC (HP and Line Amps)
-
-
-
22
42
60
-
-
-
dB
dB
dB
PSRR @217 Hz
Full-Bridge PWM Outputs
-
56
-
dB
Parameters
Symbol Min
Max
Units
Input Leakage Current
I
in
-
±10
A
Input Capacitance
-
10
pF
1.8 V - 3.3 V Logic
High-Level Output Voltage (I
OH
= -100
A)
V
OH
VL - 0.2
-
V
Low-Level Output Voltage (I
OL
= 100
A)
V
OL
-
0.2
V
High-Level Input Voltage
VL = 1.65 V
VL = 1.8 V
VL = 2.0 V
VL > 2.0 V
V
IH
0.85•VL
0.77•VL
0.68•VL
0.65•VL
-
-
-
-
V
V
V
V
Low-Level Input Voltage
V
IL
-
0.30•VL
V