LM4549BVHX/NOPB National Semiconductor, LM4549BVHX/NOPB Datasheet - Page 21

• Manufacturer Part Number: LM4549BVHX/NOPB
• Description: IC AUDIO CODEC 2MULTICH 48-LQFP
• Manufacturer: National Semiconductor
• Type: Audio Codec '97r

Specifications of LM4549BVHX/NOPB

• 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: 3.3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM4549BVHX

AC Link Serial Interface Protocol
SDATA_IN: Slot 4 – PCM Record Right Channel
This slot contains sampled data from the right channel of the
stereo ADC. The signal to be digitized is selected using the
Record Select register (1Ah) and subsequently routed
through the Record Select Mux and the Record Gain ampli-
fier to the ADC.
This is a 20-bit slot and the digitized 18-bit PCM data is
transmitted in an MSB justified format. The remaining 2
LSBs are stuffed with zeros.
(Continued)
Bits
1:0
Description
SLOT 3, INPUT FRAME (Continued)
Reserved
Stuffed with "0"s by LM4549B
Comment
21
SDATA_IN: Slots 5 to 12 – Reserved
Slots 5 – 12 of the AC Link Input Frame are not used for data
by the LM4549B and are always stuffed with zeros.
Bits
19:2
1:0
Right Channel
PCM Record
Description
Reserved
data
SLOT 4, INPUT FRAME
18-bit PCM sample from right
ADC
Stuffed with "0"s by LM4549B
Comment
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