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參數資料
型號: TLV320DAC3100IRHBT
廠商: TEXAS INSTRUMENTS INC
元件分類: DAC
英文描述: DAC WITH PROGRAMMABLE PLL, PQCC32
封裝: 5 X 5 MM, GREEN, PLASTIC, QFN-32
文件頁數: 47/97頁
文件大小: 1134K
代理商: TLV320DAC3100IRHBT
÷ M
GPIO1 (CLKOUT)
CDIV_CLKIN
MCLK
BCLK
DIN
PLL_CLK
DAC_CLK
DAC_MOD_CLK
M = 1, 2, ..., 127, 128
B0363-01
PLL_CLKIN R J.D
PLL_CLK
P
=
www.ti.com
SLAS671 – FEBRUARY 2010
Figure 5-22. General-Purpose Clock Output Options
Table 5-28. Maximum TLV320DAC3100 Clock Frequencies
Clock
DVDD
≥ 1.65 V
CODEC_CLKIN
≤ 110 MHz
DAC_CLK (DAC processing clock)
≤ 49.152 MHz
DAC_MAC_CLK
≤ 49.152 MHz with DRC disabled
≤ 48 MHz with DRC enabled
DAC_MOD_CLK
6.758 MHz
DAC_fS
0.192 MHz
BDIV_CLKIN
55 MHz
CDIV_CLKIN
100 MHz when M is odd
110 MHz when M is even
5.6.1
PLL
For lower power consumption, it is best to derive the internal audio processing clocks using the simple
dividers. When the input MCLK or other source clock is not an integer multiple of the audio processing
clocks, then it is necessary to use the onboard PLL. The TLV320DAC3100 fractional PLL can be used to
generate an internal master clock used to produce the processing clocks needed by the DAC. The
programmability of this PLL allows operation from a wide variety of clocks that may be available in the
system.
The PLL input supports clocks varying from 512 kHz to 20 MHz and is register-programmable to enable
generation of the required sampling rates with fine resolution. The PLL can be turned on by writing to
page 0 / register 5, bit D7. When the PLL is enabled, the PLL output clock, PLL_CLK, is given by the
following equation:
(6)
where
R = 1, 2, 3, ..., 16 (page 0 / register 5, default value = 1)
J = 1, 2,3, … , 63, (page 0 / register 6, default value = 4)
D = 0, 1, 2, …, 9999 (page 0 / register 7 and page 0 / register 8, default value = 0)
P = 1, 2, 3, …, 8 (page 0 / register 5, default value = 1)
Copyright 2010, Texas Instruments Incorporated
APPLICATION INFORMATION
51
Product Folder Link(s): TLV320DAC3100
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