Cirrus Logic CS6422 - Manual (Page 6)

CS6422
6
ANALOG TRANSMISSION CHARACTERISTICS
(T
A
= 25°C, DVDD = AVDD = 5 V, f
XTAL
=
20.480 MHz, RVol=TVol=RGain=TGain= 0 dB, HDD=TSD=RSD=1, analog inputs and outputs loaded with
resistors and capacitors as shown in the typical connection diagram, Figure 4)
MICROPHONE AMPLIFIER
(T
A
= 25°C, DVDD = AVDD = 5 V, f
XTAL
= 20.480 MHz)
DIGITAL CHARACTERISTICS
(T
A
= 25°C, DVDD = AVDD = 5 V,f
XTAL
= 20.480 MHz)
Parameter Symbol Min Typ Max Units
Idle Channel Noise C-Message weighted (0-4 kHz)
(Inputs grounded C-Message weighted (0-4 kHz)
through a capacitor) Psophometrically weighted (0-4 kHz)
-80
11
-78
-73 dBV
dBrnC0
dBm0p
Signal-to-Noise Ratio C-Message weighted (0-4 kHz)
(1.0 V
rms,
1 kHz sine wave input)
SNR 73 80 dB
Total Harmonic Distortion C-Message weighted (0-4 kHz)
(1.0 V
rms,
1 kHz sine wave input)
THD 0.030 0.1 %
Programmable Analog 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 V
rms
DAC Full-scale Voltage Output 1.0 1.2 V
rms
ADC Noise Floor C-Message weighted (0-4 kHz) -83 dBV
DAC Noise Floor, DAC muted C-Message weighted (0-4 kHz) -83 dBV
Parameter Symbol Min Typ Max Units
Gain (Z
source
= 50
Ω)
A
mic
34 dB
Signal-to-Noise Ratio C-Message weighted (0-4 kHz) SNRm 70 dB
Input Impedance Z
inm
8 k Ω
Input Offset Voltage V
offm
2.12 V
Parameter Symbol Min Typ Max Units
High-Level Input Voltage V
IH
DVDD-1.0 V
Low-Level Input Voltage V
IL
1.0 V
Input Leakage Current I
leak
10 µA
Input Capacitance C
IN
5 pF
CS6422
6 DS295F1