LM4546AVHX/NOPB National Semiconductor, LM4546AVHX/NOPB Datasheet
LM4546AVHX/NOPB
Specifications of LM4546AVHX/NOPB
Related parts for LM4546AVHX/NOPB
LM4546AVHX/NOPB Summary of contents
Page 1
... The AC97 architecture separates the analog and digital functions of the PC audio system allowing both for system design flex- ibility and increased performance. Block Diagram © 2009 National Semiconductor Corporation 100985 Version 4 Revision 1 LM4546 Key Specifications ■ ...
Page 2
... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Storage Temperature Input Voltage ESD Susceptibility (Note 5) pins 27, 28 pin 3 ESD Susceptibility (Note 6) pin 3 Junction Temperature Soldering Information Electrical Characteristics ...
Page 3
Symbol Parameter Resolution Dynamic Range (Note 2) Frequency Response Digital to Analog Converters Resolution Dynamic Range (Note 2) THD Total Harmonic Distortion Frequency Response Group Delay (Note 2) Out of Band Energy Stop Band Rejection D Discrete Tones T Digital ...
Page 4
Note 1: All voltages are measured with respect to the ground pin, unless otherwise specified. Note 2: These specifications are guaranteed by design and characterization; they are not production tested. Note 3: Absolute Maximum Ratings indicate limits beyond which damage ...
Page 5
Timing Diagrams 100985 Version 4 Revision 1 Clocks 10098510 Data Setup and Hold 10098511 Digital Rise and Fall 10098512 Cold Reset Warm Reset 5 Print Date/Time: 2009/04/29 09:52:43 10098513 10098514 www.national.com ...
Page 6
Typical Application www.national.com FIGURE 2. LM4546 Typical Application Circuit 6 100985 Version 4 Revision 1 Print Date/Time: 2009/04/29 09:52:43 10098503 ...
Page 7
Connection Diagram Pin Descriptions Analog I/O Name Pin Functional Description This is a mono input which gets summed into the stereo line output after the National 3D Sound PC_BEEP 12 I block. The PC_BEEP level can ...
Page 8
Name Pin Functional Description This input can be used to reject common mode signals on the CD_L and CD_R inputs. CD_GND CD_GND ground point and not a DC ground point. This ...
Page 9
Digital I/O and Clocking Name Pin 24.576 MHz crystal input. Use a fundamental-mode type crystal. When operating from a crystal, a XTL_IN 2 I 1MΩ resistor must be connected across pins 2 and 3. 24.576 MHz crystal ...
Page 10
Typical Performance Characteristics ADC Noise Floor 10098515 ADC Frequency Response 10098519 www.national.com DAC Noise Floor 10098516 DAC Frequency Response 10098520 10 100985 Version 4 Revision 1 Print Date/Time: 2009/04/29 09:52:43 Analog Loopthru Noise Floor 10098518 ...
Page 11
Version 4 Revision 1 Print Date/Time: 2009/04/29 09:52:43 www.national.com ...
Page 12
Application Information AC Link Serial Interface Protocol AC Link Output Frame: SDATA_OUT (output from controller, input to LM4546) The audio output frame (output from AC '97 Controller) con- tains control and PCM data targeted for the LM4546 control registers and ...
Page 13
Bit Description 1 = This frame has valid 15 Valid Frame Control register Control Address is valid. address Control register Control Data is valid. data Left Playback Left PCM Data is ...
Page 14
FIGURE 7. Start of Audio Input Frame Bit Description Codec Ready 15 0=Not Ready, 1=Ready Bit 14 Slot 1 data valid Status Address is valid 13 Slot 2 data valid Status Data is valid 12 Slot 3 data valid Left ...
Page 15
Mute Mx5:Mx0 0 00 0000 0dB attenuation 0 01 1111 46.5dB attenuation 0 1X XXXX 46.5dB attenuation 1 XX XXXX Default: 8000h PC ...
Page 16
BIT Function PRO PCM in ADC's and Input Mux powerdown PR1 PCM out DAC's powerdown PR2 Analog Mixer powerdown (VREF still on) PR3 Analog Mixer powerdown (VREF off) Digital Interface (AC Link) powerdown PR4 (external clk off) Pin46 (ID1) NC ...
Page 17
Physical Dimensions inches (millimeters) unless otherwise noted 100985 Version 4 Revision 1 48-Lead , TQFP 1.4mm, JEDEC (M) Order Number LM4546VH NS Package Number VBH48A 17 Print Date/Time: 2009/04/29 09:52:43 www.national.com ...
Page 18
... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...