LM49370RLX/NOPB National Semiconductor, LM49370RLX/NOPB Datasheet - Page 24

• 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
7:0
12.6 PLL N DIVIDER CONFIGURATION REGISTER
This register is used to control the feedback divider of the PLL. (Note 13)
The N divider should be set such that the output of the divider is between 0.5 MHz and 5 MHz. (Fin/M)*N will be the target resting
VCO frequency, F
(comparison frequency) or F
The integer division of the N divider is derived from PLL_N such that:
Note 13: See Further Notes on PLL Programming for further details.
PLL_N
Field
VCO
. The N divider should be set such that 40 MHz < (Fin/M)*N < 60 MHz. Fin/M is often referred to as F
This programs the PLL feedback divider as follows:
ref
(reference frequency), in this document F
250 to 255
For 9 < PLL_N < 251: N = PLL_N
PLL_N
0 to 10
249
11
12
13
14
TABLE 7. PLL_N (0x03h)
…
24
Description
comp
is used.
Feedback Divider Value
249
250
10
11
12
13
14
…
comp