參數(shù)資料
型號(hào)： TLV320DAC32IRHBT
廠商： TEXAS INSTRUMENTS INC
元件分類： DAC
英文描述： SERIAL INPUT LOADING, DAC WITH PROGRAMMABLE PLL, PQCC32
封裝： 5 X 5 MM, GREEN, PLASTIC, QFN-32
文件頁(yè)數(shù)： 19/69頁(yè)
文件大?。?/td> 1242K
代理商： TLV320DAC32IRHBT
2/Q
PLL_CLKIN
DAC
DAC_CLKIN
PLL_OUT
K = J.D
J = 1,2,3,. . . , 62,63
D= 0000,0001, . . . ,9998,9999
R= 1,2,3,4, . . . ,15,16
P= 1,2, . . . . ,7,8
MCLK
BCLK
CLKDIV_IN
PLL_IN
WCLK= Fsref/ Ndac
DAC_FS
Ndac=1,1.5,2, . . ., 5.5,6
DAC DRA => Ndac = 0.5
DAC_CLK = 256*Fsref
CLKDIV_OUT
1/8
PLLDIV_OUT
CLKDIV_CLKIN
Q = 3,3, . . . . ,16,17
K*R/P
SLAS506B – NOVEMBER 2006 – REVISED DECEMBER 2008........................................................................................................................................ www.ti.com
Figure 31. Audio Clock Generation Processing
The TLV320DAC32 can accept an MCLK input from 2-MHz to 50-MHz, which can then be passed through either
a programmable divider or a PLL, to get the proper internal audio master clock needed by the part. Alternatively,
the BCLK input can also be used to generate the internal audio master clock.
A primary concern is proper operation of the dac at various sample rates with the limited MCLK frequencies
available in the application system. This device includes a highly programmable PLL to accommodate such
situations easily. The integrated PLL can generate audio clocks from a wide variety of possible MCLK inputs,
with particular focus paid to the standard MCLK rates already widely used.
When the PLL is disabled,
Where Q = 2, 3, …, 17
CLKDIV_IN can be MCLK or BCLK, selected by register 102, bits D7-D6.
NOTE – when NDAC = 1.5, 2.5, 3.5, 4.5, or 5.5, odd values of Q are not allowed. In this mode, MCLK can be as
high as 50 MHz, and Fsref should fall within 39 kHz to 53 kHz.
When the PLL is enabled,
Fsref = (PLLCLK_IN
K
R) / (2048
P), where
P = 1, 2, 3,…, 8
R = 1, 2, …, 16
K = J.D
26
Copyright 2006–2008, Texas Instruments Incorporated
Product Folder Link(s): TLV320DAC32
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