LM49370RLX/NOPB National Semiconductor, LM49370RLX/NOPB Datasheet - Page 20

• Manufacturer Part Number: LM49370RLX/NOPB
• Description: IC AUDIO SUBSYSTEM 1.2W 49USMDXT
• Manufacturer: National Semiconductor
• Series: Boomer®, PowerWise®r
• Type: Class Dr

Specifications of LM49370RLX/NOPB

• Output Type: 1-Channel (Mono) with Mono and Stereo Headphones
• Max Output Power X Channels @ Load: 1.2W x 1 @ 8 Ohm; 52mW x 2 @ 16 Ohm
• Voltage - Supply: 2.5 V ~ 5.5 V
• Features: 3D, Depop, I²C, I²S, Microphone, Mute, PCM, Shutdown, SPI, Standby, Volume Control
• Mounting Type: Surface Mount
• Package / Case: 49-MicroSMDxt
• Operational Class: Class-D
• Single Supply Voltage (typ): Not RequiredV
• Dual Supply Voltage (typ): 3/5V
• Supply Current (max): 15.5@3.3VmA
• Power Supply Requirement: Quint
• Rail/rail I/o Type: No
• Power Supply Rejection Ratio: 86dB
• Single Supply Voltage (min): Not RequiredV
• Single Supply Voltage (max): Not RequiredV
• Dual Supply Voltage (min): 1.8/2.5V
• Dual Supply Voltage (max): 4.5/5.5V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 49
• For Use With: LM49370RLEVAL - BOARD EVALUATION LM49370RL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM49370RLX

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Bits
1:0
7:2
12.2 CLOCKS CONFIGURATION REGISTER
This register is used to control the clocks throughout the chip.
DAC_CLK
R_DIV
Field
This selects the clock to be used by the audio DAC system.
This programs the R divider.
DAC_CLK
13 to 61
R_DIV
00
01
10
11
10
11
12
62
63
TABLE 3. CLOCKS (0x01h)
0
1
2
3
4
5
6
7
8
9
2
2
2
2
20
Description
DAC Input Source
PLL_OUTPUT
PCM_CLK_IN
I2S_CLK_IN
Divide Value
Bypass
Bypass
7 to 31
MCLK
31.5
1.5
2.5
3.5
4.5
5.5
6.5
32
2
3
4
5
6