
CS6420
DS205PP2
5
ANALOG TRANSMISSION CHARACTERISTICS
(T
A
= 25°C, DVDD = AVDD = 5V, f
XTAL
=
20.480 MHz, RVol=TVol=RGain=TGain= 0 dB, HD=TSD=RSD=1, analog inputs and ouputs loaded with resistors
and capacitors as shown in the typical connection diagram, Figure 2)
Parameter
Symbol
Min
Typ
Max
-69
Units
dBV
dBrnC0
dBm0p
dB
dBrnC0
dBm0p
%
dB
Idle Channel Noise
(Inputs grounded
through a capacitor)
Signal-to-Noise Ratio
(Full Scale, 1 kHz
sine wave input)
Total Harmonic Distortion
Programmable Gain
A-weighted (0-20 kHz)
C-Message weighted (0-4 kHz)
Psophometrically weighted (0-4 kHz)
A-weighted (0-20 kHz)
C-Message weighted (0-4 kHz)
Psophometrically weighted (0-4 kHz)
C-Message Weighted (0-4 kHz)
17
-67
SNR
69
17
-67
THD
0.1
RGain/TGain = 00
RGain/TGain = 01
RGain/TGain = 10
RGain/TGain = 11
0
6
9.5
12
3
1.0
1.0
Volume Control Stepsize (TVol/RVol)
ADC Full-scale Voltage Input
DAC Full-scale Voltage Output
ADC Noise Floor
DAC Noise Floor, DAC muted C-Message Weighted (0-4 kHz)
dB
Vrms
Vrms
dBV
dBV
0.9
1.1
-80
-85
C-Message Weighted (0-4 kHz)
MICROPHONE AMPLIFIER
(T
A
= 25°C, DVDD = AVDD = 5V,f
XTAL
= 20.480 MHz)
Parameter
Symbol
A
mic
SNR
m
Z
inm
V
offm
Min
Typ
34
Max
Units
dB
Gain (Zsource = 50
)
Signal-to-Noise Ratio
A-weighted (0-20 kHz)
63
dB
k
V
Input Impedance
5
Input Offset Voltage
2.12
DIGITAL CHARACTERISTICS
(T
A
= 25°C, DVDD = AVDD = 5V,f
XTAL
= 20.480 MHz)
Parameter
Symbol
V
IH
V
IL
I
leak
C
IN
Min
Typ
Max
Units
V
High-Level Input Voltage
DVDD-1.0
Low-Level Input Voltage
1.0
V
μ
A
pF
Input Leakage Current
10
Input Capacitance
5