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參數資料
| 型號： | TLV320DAC3101IRHBR |
| 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： | 23/100頁 |
| 文件大小： | 1281K |
| 代理商： | TLV320DAC3101IRHBR |
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LargestPositiveNumber:
=0.111 1111 1111 111
=0.999969482421875=1.0 – 1LSB
1
LargestNegativeNumber:
=1.0000 0000 0000 000
=0x8000= –1.0(bydefinition)
1
S.xxxx xxxx xxxx xxx
..
x
SignBit
2
Bit
–1
2
Bit
–4
2
Bit
–15
Fraction
Point
www.ti.com
SLAS666 – JANUARY 2010
5.5.1.3
DAC User-Programmable Filters
Depending on the selected processing block, different types and orders of digital filtering are available. Up
to six biquad sections are available for specific processing blocks.
The coefficients of the available filters are arranged as sequentially-indexed coefficients in two banks. If
adaptive filtering is chosen, the coefficient banks can be switched in real time.
When the DAC is running, the user-programmable filter coefficients are locked and cannot be accessed
for either read or write.
However, the TLV320DAC3101 offers an adaptive filter mode as well. Setting page 8 / register 1,
bit D2 = 1 turns on double buffering of the coefficients. In this mode, filter coefficients can be updated
through the host and activated without stopping and restarting the DAC. This enables advanced adaptive
filtering applications.
In the double-buffering scheme, all coefficients are stored in two buffers (buffers A and B). When the DAC
is running and the adaptive filtering mode is turned on, setting page 8 / register 1, bit D0 = 1 switches the
coefficient buffers at the next start of a sampling period. This bit is set back to 0 after the switch occurs. At
the same time, page 8 / register 1, bit D1 toggles.
The flag in page 8 / register 1, bit D1 indicates which of the two buffers is actually in use.
Page 8 / register 1, bit D1 = 0: buffer A is in use by the DAC processing block; bit D1 = 1: buffer B is in
use.
While the device is running, coefficient updates are always made to the buffer not in use by the DAC,
regardless of the buffer to which the coefficients have been written.
Table 5-12. Adaptive-Mode Filter-Coefficient Buffer Switching
DAC Running? Page 8 / Register 1, Bit D1 Coefficient Buffer in Use
Writing to
Updates
No
0
None
Buffer A (Pages 8 and 9)
No
0
None
Buffer B (Pages 12 and 13)
Yes
0
Buffer A
Buffer A (Pages 8 and 9)
Buffer B (Pages 12 and 13)
Yes
0
Buffer A
Buffer B (Pages 12 and 13)
Yes
1
Buffer B
Buffer A (Pages 8 and 9)
Yes
1
Buffer B
Buffer B (Pages 12 and 13)
Buffer A (Pages 8 and 9)
The user-programmable coefficients for the DAC processing blocks are defined on pages 8 and 9 for
buffer A and pages 12 and 13 for buffer B.
The coefficients of these filters are each 16-bit, 2s-complement format, occupying two consecutive 8-bit
registers in the register space. Specifically, the filter coefficients are in 1.15 (one dot 15) format with a
range from –1.0 (0x8000) to 0.999969482421875 (0x7FFF) as shown in Figure 5-13.
Figure 5-13.
Copyright 2010, Texas Instruments Incorporated
APPLICATION INFORMATION
29
Product Folder Link(s): TLV320DAC3101
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| TLV320DAC3101IRHBT | 功能描述:音頻數/模轉換器 IC Low-Pwr audio DAC RoHS:否 制造商:Texas Instruments 轉換器數量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| TLV320DAC3120 | 制造商:TI 制造商全稱:Texas Instruments 功能描述: |
| TLV320DAC3120_10 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Low-Power Mono Audio DAC With Embedded miniDSP and Mono Class-D Speaker Amplifier |
| TLV320DAC3120EVM-U | 功能描述:音頻 IC 開發工具 TLV320DAC3120EVM-U Eval Mod RoHS:否 制造商:Texas Instruments 產品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| TLV320DAC3120IRHBR | 功能描述:音頻數/模轉換器 IC Lo-Pwr Audio DAC w/ Audio Proc RoHS:否 制造商:Texas Instruments 轉換器數量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
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