LM49450SQ/NOPB National Semiconductor, LM49450SQ/NOPB Datasheet - Page 26

• Manufacturer Part Number: LM49450SQ/NOPB
• Description: IC AUDIO SUBSYSTEM 2.5W D 32LLP
• Manufacturer: National Semiconductor
• Series: Boomer®r
• Type: Class Dr

Specifications of LM49450SQ/NOPB

• Output Type: 2-Channel (Stereo) with Stereo Headphones
• Max Output Power X Channels @ Load: 2.5W x 2 @ 4 Ohm
• Voltage - Supply: 2.7 V ~ 5.5 V
• Features: 3D, DAC, Depop, I²C, I²S, Mute, Short-Circuit and Thermal Protection, Shutdown, Volume Control
• Mounting Type: Surface Mount
• Package / Case: 32-LLP
• Amplifier Class: D
• No. Of Channels: 2
• Output Power: 1.2W
• Supply Voltage Range: 2.7V To 5.5V
• Load Impedance: 8ohm
• Operating Temperature Range: -40°C To +85°C
• Amplifier Case Style: LLP
• Rohs Compliant: Yes
• For Use With: LM49450SQEVAL - BOARD EVAL FOR LM49450
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM49450SQ; LM49450SQ; LM49450SQTR

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MODE CONTROL REGISTER (0x00h)
Default value is 0x00h.
CLOCK CONTROL REGISTER (0x01h)
Default value is 0x00h.
B5:B0
Bit
B7
B6
B6:B5
Bit
B7
B4
B3
B2
B0
DAC_DITHER_OFF
DAC_DITHER_ON
RDIV_5 (B5)
RDIV_4 (B4)
RDIV_3 (B3)
RDIV_2 (B2)
RDIV_1 (B1)
RDIV_0 (B0)
DAC_MODE_1 (B6)
DAC_MODE_0 (B5)
Name
EXT_REF
ENABLE
COMP
MUTE
Name
SS
B5
0
0
0
0
0
0
1
1
1
0
1
0
1
B4
0
0
0
0
0
0
1
1
1
B6
TABLE 3. Clock Control Register
TABLE 2. Mode Control Register
0
0
1
1
B3
0
0
0
0
0
0
1
1
1
Value
Value
0
1
0
1
0
1
0
1
0
1
TO
B2
0
0
0
0
1
1
1
1
1
B5
26
0
1
0
1
B1
0
0
1
1
0
0
0
1
1
Internal reference selected
External reference selected. See External Reference
section.
Select DAC over sampling Rate
Default DAC compensation filter selected
Programmable DAC compensation filter selected. See
DAC Compensation Filter section.
Fixed frequency oscillator selected
Spread spectrum oscillator selected
Un-mute device
Mute device
Device shutdown. Default state during a POR event
Device enabled.
B0
0
1
0
1
0
1
1
0
1
Default DAC state
Permanently disables DAC dither
Default DAC state
Permanently enables DAC dither
Sets MCLK divider ratio
Description
In 0.5 increments
Bypass divider
125
128
Description
64
32
31.5
1.5
2.5
31
32
1
2
5