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CS6420-CS Datasheet(PDF) 5 Page - Cirrus Logic

Part No. CS6420-CS
Description  FULL DUPLEX SPEAKERPHONE CHIP
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Maker  CIRRUS [Cirrus Logic]
Homepage  http://www.cirrus.com
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CS6420
DS205PP2
5
ANALOG TRANSMISSION CHARACTERISTICS (T
A = 25°C, DVDD = AVDD = 5V, fXTAL =
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
Units
Idle Channel Noise
A-weighted (0-20 kHz)
(Inputs grounded
C-Message weighted (0-4 kHz)
through a capacitor)
Psophometrically weighted (0-4 kHz)
17
-67
-69
dBV
dBrnC0
dBm0p
Signal-to-Noise Ratio
A-weighted (0-20 kHz)
(Full Scale, 1 kHz
C-Message weighted (0-4 kHz)
sine wave input)
Psophometrically weighted (0-4 kHz)
SNR
69
17
-67
dB
dBrnC0
dBm0p
Total Harmonic Distortion
C-Message Weighted (0-4 kHz)
THD
0.1
%
Programmable Gain
RGain/TGain = 00
RGain/TGain = 01
RGain/TGain = 10
RGain/TGain = 11
0
6
9.5
12
dB
Volume Control Stepsize (TVol/RVol)
3
dB
ADC Full-scale Voltage Input
0.9
1.0
Vrms
DAC Full-scale Voltage Output
1.0
1.1
Vrms
ADC Noise Floor
C-Message Weighted (0-4 kHz)
-80
dBV
DAC Noise Floor, DAC muted C-Message Weighted (0-4 kHz)
-85
dBV
MICROPHONE AMPLIFIER (T
A = 25°C, DVDD = AVDD = 5V,fXTAL = 20.480 MHz)
Parameter
Symbol
Min
Typ
Max
Units
Gain (Zsource = 50
Ω)
Amic
34
dB
Signal-to-Noise Ratio
A-weighted (0-20 kHz)
SNRm
63
dB
Input Impedance
Zinm
5k
Input Offset Voltage
Voffm
2.12
V
DIGITAL CHARACTERISTICS (T
A = 25°C, DVDD = AVDD = 5V,fXTAL = 20.480 MHz)
Parameter
Symbol
Min
Typ
Max
Units
High-Level Input Voltage
VIH
DVDD-1.0
V
Low-Level Input Voltage
VIL
1.0
V
Input Leakage Current
Ileak
10
µA
Input Capacitance
CIN
5pF




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