CS6422-CS Cirrus Logic Inc, CS6422-CS Datasheet - Page 42

• Manufacturer Part Number: CS6422-CS
• Description: IC CODEC SPKRPHONE 2CH 20-SOIC
• Manufacturer: Cirrus Logic Inc
• Type: Audio Processorr

Specifications of CS6422-CS

• Mounting Type: Surface Mount
• Package / Case: 20-SOIC
• Applications: Speakerphones
• Peak Reflow Compatible (260 C): No
• Termination Type: SMD
• Supply Voltage Max: 5.5V
• Leaded Process Compatible: No
• Supply Voltage Min: 4.5V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 598-1199-5

5. PIN DESCRIPTIONS
Analog Interface
AO - Acoustic Interface Output, Pin 3
NO - Network Interface Output, Pin 4
API - Acoustic Interface Preamplifier Input, Pin 20
APO - Acoustic Interface Preamplifier Output, Pin 18
MB - Microphone Bias Voltage Output, Pin 19
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Analog voltage output for the acoustic side (near-end output/receive output). Maximum output signal is
1.1 V
output is pre-compensated to expect a single-pole RC low pass filter with a corner frequency of 4 kHz.
Analog voltage output for the network side (far-end output/transmit output). Maximum output signal is
1.1 V
single-pole RC low pass filter with a corner frequency of 4 kHz.
Input to the acoustic side microphone preamplifier. Signal source resistance at this pin will reduce the
34 dB gain inherent in the preamplifier. The maximum input signal level to avoid clipping is 20 mV
(57 mV
Output of the acoustic side microphone preamplifier and input to the acoustic side analog-to-digital
converter (near-end input/transmit input). This input expects a single-pole RC anti-aliasing filter with a
corner frequency of 8 kHz. Maximum signal level before clipping at this point is 0.9 V
assuming default settings for TGain.
Output of 3.5 VDC provides the internal voltage reference for the CS6422. MB must be decoupled with
a 10 µF and 0.1 µF capacitor to prevent noise from affecting the on-chip voltage reference. MB must
not be connected to any load.
rms
rms
pp
(3.1 V
(3.1 V
), assuming default settings.
pp
pp
). This output can drive down to 10 kΩ and is usually followed by a speaker driver. The
). This output can drive down to 10 kΩ. The output is pre-compensated to expect a
STROBE
AGND
AVDD
DRDY
DATA
RST
NC1
NC2
AO
NO
1
2
3
4
5
6
7
8
9
10
CS6422
20
19
18
17
16
15
14
13
12
11
API
MB
APO
NI
DVDD
DGND
CLKI
CLKO
NC4
NC3
rms
CS6422
CS6422
(2.5 V
DS295F1
pp
rms
),