User guide

24 DS679F1
CS42L51
DC ELECTRICAL CHARACTERISTICS
(AGND = 0 V; all voltages with respect to ground.)
22. The DC current draw represents the allowed current draw from the VQ pin due to typical leakage
through electrolytic de-coupling capacitors.
23. Valid with the recommended capacitor values on DAC_FILT+, ADC_FILT+ and VQ. Increasing the ca-
pacitance will also increase the PSRR.
DIGITAL INTERFACE SPECIFICATIONS & CHARACTERISTICS
24. See “Digital I/O Pin Characteristics” on page 9 for serial and control port power rails.
Parameters Min Typ Max Units
VQ Characteristics
Nominal Voltage
Output Impedance
DC Current Source/Sink (Note 22)
-
-
-
0.5•VA
23
-
-
-
10
V
kΩ
µA
DAC_FILT+ Nominal Voltage
ADC_FILT+ Nominal Voltage
-
-
VA
VA
-
-
V
V
VSS_HP Characteristics
Nominal Voltage
DC Current Source
-
-
-0.8•(VA_HP) -
10
V
µA
MIC BIAS Characteristics
Nominal Voltage MICBIAS_LVL[1:0] = 00
MICBIAS_LVL[1:0] = 01
MICBIAS_LVL[1:0] = 10
MICBIAS_LVL[1:0] = 11
DC Current Source
Power Supply Rejection Ratio (PSRR) 1 kHz
-
-
-
-
-
-
0.8•VA
0.7•VA
0.6•VA
0.5•VA
-
50
-
-
-
-
1
-
V
V
V
V
mA
dB
Power Supply Rejection Ratio (PSRR) (Note 23) 1 kHz
-60-dB
Parameters (Note 24) Symbol Min Max Units
Input Leakage Current
I
in
-±10µA
Input Capacitance
-10pF
1.8 V - 3.3 V Logic
High-Level Output Voltage
(I
OH
= -100 µA)
V
OH
VL - 0.2 - V
Low-Level Output Voltage
(I
OL
= 100 µA)
V
OL
-0.2V
High-Level Input Voltage
V
IH
0.68•VL - V
Low-Level Input Voltage
V
IL
- 0.32•VL V