CDB44L11 Cirrus Logic Inc, CDB44L11 Datasheet - Page 2

• Manufacturer Part Number: CDB44L11
• Description: EVALUATION BOARD FOR CS44L11
• Manufacturer: Cirrus Logic Inc
• Series: Popguard®r

Specifications of CDB44L11

• Amplifier Type: Class D
• Output Type: Headphones, 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 23mW x 2 @ 16 Ohm
• Voltage - Supply: 1.8 V ~ 2.4 V
• Operating Temperature: -10°C ~ 70°C
• Board Type: Fully Populated
• Utilized Ic / Part: CS44L11
• Description/function: Audio DSPs
• Operating Supply Voltage: 5 V
• Product: Audio Modules
• For Use With/related Products: CS44L11
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

TABLE OF CONTENTS
LIST OF FIGURES
LIST OF TABLES
2
1. CDB44L11 SYSTEM OVERVIEW ............................................................................................ 3
2. SCHEMATIC DESCRIPTIONS ................................................................................................. 3
3. OPERATION INFORMATION ................................................................................................... 6
4. CONTROL FUNCTIONS ........................................................................................................... 7
5. BILL OF MATERIALS ........................................................................................................... 17
6. REVISION HISTORY .............................................................................................................. 20
Figure 1. CS44L11 PWM Headphone Amplifier ............................................................................ 10
Figure 2. CS8420 S/PDIF Receiver and Sample Rate Converter................................................. 11
Figure 3. Microcontroller................................................................................................................ 12
Figure 4. Power Supply ................................................................................................................. 13
Figure 5. Assembly Drawing ......................................................................................................... 14
Figure 6. Top Layer ....................................................................................................................... 15
Figure 7. Bottom Layer .................................................................................................................. 16
Table 1. Volume Status LED Decodes ............................................................................................ 8
Table 2. Treble/Bass Boost Status LED Decodes........................................................................... 8
Table 3. Initial CS44L11 Register Settings...................................................................................... 9
Table 4. Revision History .............................................................................................................. 20
2.1 CS44L11 Headphone Monitor and Output Filter ................................................................ 3
2.2 Clocking ............................................................................................................................. 4
2.3 CS8420 Sample Rate Converter ....................................................................................... 4
2.4 Microcontroller ................................................................................................................... 4
2.5 Power Supplies and Level-Shifting .................................................................................... 4
3.1 Operating Instructions ........................................................................................................ 6
4.1 Control Buttons .................................................................................................................. 7
4.2 LED Status ......................................................................................................................... 7
4.3 CS44L11 Initialization ........................................................................................................ 9
CDB44L11
DS640DB1