LM4545VH National Semiconductor, LM4545VH Datasheet - Page 7

• Manufacturer Part Number: LM4545VH
• Description: IC AUDIO CODEC '97 18BIT 48LQFP
• Manufacturer: National Semiconductor
• Type: Audio Codec '97r

Specifications of LM4545VH

• Data Interface: Serial
• Resolution (bits): 18 b
• Number Of Adcs / Dacs: 2 / 2
• Sigma Delta: Yes
• Dynamic Range, Adcs / Dacs (db) Typ: 90 / 89
• Voltage - Supply, Analog: 4.2 V ~ 5.5 V
• Voltage - Supply, Digital: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *LM4545VH

PC_BEEP
Connection Diagram
Pin Descriptions
Analog I/O
PHONE
AUX_L
Name
Pin
12
13
14
I / O
I
I
I
Functional Description
This is a mono input which gets summed into both the stereo line and stereo headphone
output after the the National 3D Sound block. The PC_BEEP level can be adjusted from 0dB
to −45dB in 3dB steps, or muted, via register 0Ah.
This is a mono input which gets summed into both the stereo line output after the the
National 3D Sound block. The PHONE level can be adjusted from +12dB to −34.5dB in
1.5dB steps as well as muted via register 0Ch.
This line level input can be routed through the Input Mux and recorded by the left ADC. In
addition, this analog input gets summed into the left output stream. The amount of AUX_L
signal mixed in the left output stream can be adjusted from +12dB to −34.5dB in 1.5dB steps
as well as muted via register 16h.
See NS Package Number VBH48A
Order Number LM4545VH
Top View
7
DS100069-2
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