Instruction Manual
Table Of Contents
- CRD4299-1 AMR: CrystalClear™ AC '97 AMR Reference Design
- Features
- Description
- TABLE OF CONTENTS
- LIST OF FIGURES
- LIST OF TABLES
- Contacting Cirrus Logic Support
- 1. GENERAL INFORMATION
- 2. REFERENCE DESIGN FEATURES
- 3. SCHEMATIC DESCRIPTION
- 4. GROUNDING AND LAYOUT
- 5. AUDIO PERFORMANCE EVALUATION
- Table 1. Reference Designators
- Table 2. Microphone Support Specifications
- Table 3. Full Duplex Specifications
- Table 4. Analog Mixer, Line In to Line Out Specifications
- Table 5. Analog Mixer, Mic In to Line Out Specifications
- 5.1 Plots
- Figure 1. Full Duplex (A-D-PC-D-A): Line In/Out Frequency Response
- Figure 2. Full Duplex (A-D-PC-D-A): Line In/Out Dynamic Range
- Figure 3. Full Duplex (A-D-PC-D-A): Line In/Out THD+N vs. Frequency
- Figure 4. Analog Mixer (A-A): Line In/Out Frequency Response
- Figure 5. Analog Mixer (A-A): Line In/Out Dynamic Range
- Figure 6. Analog Mixer (A-A): Line In/Out THD+N vs. Frequency
- Figure 7. Analog Mixer (A-A): Mic In/Line Out Frequency Response
- Figure 8. Analog Mixer (A-A): Mic In/Line Out Dynamic Range
- Figure 9. Analog Mixer (A-A): Mic In/Line Out THD+N vs. Frequency
- Figure 10. Analog Mixer (A-A): Line In/Out Crosstalk vs. Frequency
- 6. REFERENCES
- 7. SCHEMATIC, LAYOUT, AND BRACKET DRAWINGS
- 8. BILL OF MATERIALS

CRD4299-1 AMR
DS319RD1A1 9
Signal Name Connector Maximum Voltage Reference
Designator
Imp.
(k
Ω)
Line In (A-D-PC-D-A) Jack 2.376 V
RMS
0 dB FS (li)
Line In (A-A) Jack 2.142 V
RMS
0 dB FS (li)
Mic In Jack 0.128 V
RMS
0 dB FS (mi)
Line Out Jack 1.021 V
RMS
0 dB FS (lo) N/A
Table 1. Reference Designators
Microphones Supported Support Comments
3-Pin Phantom Power (power on ring) Yes
2-Pin Dynamic Yes
2-Pin Phantom Power (power on tip)
Table 2. Microphone Support Specifications
Full Duplex (A-D-PC-D-A):
Line In to Line Out Reference Left Right Units Figures
Dynamic Range -91.4 -91.4 dB FS A (lo) 99 - 1NXL
THD+N -3 dB FS (li) -85.2 -85.2 dB FS (lo) 99 - 1DXL
Frequency Response Ac = -0.4 dB 20-20k 20-20k Hz 99 - 1MXL
NOTE: TM004: combined test used in lieu of TM002 and TM003
Table 3. Full Duplex Specifications
Analog Mixer (A-A):
Line In to Line Out Reference Left Right Units Figures
Dynamic Range -95.8 -95.7 dB FS A (lo) 99 - 1NAL
THD+N -3 dB FS (li) -92.9 -92.9 dB FS (lo) 99 - 1DAL
Frequency Response Ac = +-0.2 dB 20-20k 20-20k Hz 99 - 1MAL
Crosstalk f = 10 kHz -66.8 -66.5 dB FS (lo) 99 - 1CAL
Table 4. Analog Mixer, Line In to Line Out Specifications
Analog Mixer (A-A):
Mic In to Line Out Reference Left Right Units Figures
Dynamic Range Gain = 0 dB -94.1 N/A dB FS A (lo) 99 - 1NAM
THD+N -3 dB FS (mi) -91.3 N/A dB FS (lo) 99 - 1DAM
Frequency Response Ac = -3 dB 50-15k N/A Hz 99 - 1MAM
NOTE: Mic In is Mono
Table 5. Analog Mixer, Mic In to Line Out Specifications