LM49370RL/NOPB National Semiconductor, LM49370RL/NOPB Datasheet - Page 24
LM49370RL/NOPB
Manufacturer Part Number
LM49370RL/NOPB
Description
IC AUDIO SUBSYSTEM 1.2W 49USMDXT
Manufacturer
National Semiconductor
Series
Boomer®, PowerWise®r
Type
Class Dr
Datasheet
1.LM49370RLNOPB.pdf
(100 pages)
Specifications of LM49370RL/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
Dc
07+
For Use With
LM49370RLEVAL - BOARD EVALUATION LM49370RL
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM49370RLTR
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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
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