参数资料
| 型号： | AD1893JSTZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 20/20页 |
| 文件大小： | 0K |
| 描述： | IC SAMPLE-RATE CONV 16BIT 44TQFP |
| 标准包装： | 1 |
| 系列： | SamplePort™ |
| 类型： | 采样率转换器 |
| 应用： | 多媒体 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-LQFP |
| 供应商设备封装： | 44-LQFP（10x10） |
| 包装： | 托盘 |
AD1893
REV. A
–9–
AMP
TIME
SUBFILTER COEFFICIENTS
ALIGNED TO THE LEFT
TSIN = 1/FSIN
FREQ
FSIN/2
PHASE
DELAY = NOMINAL
DELAY = NOMINAL – .25/FSIN
DELAY = NOMINAL – .5/FSIN
DELAY = NOMINAL – .75/FSIN
Figure 3. Four Polyphase Subfilters Realigned to Coarse Time Grid
POLYPHASE FILTER 1
POLYPHASE FILTER 2
POLYPHASE FILTER 3
POLYPHASE FILTER 4
POLYPHASE FILTER 5
POLYPHASE FILTER 6
POLYPHASE FILTER 7
INPUT
SIGNAL
POLYPHASE FILTER N-1
POLYPHASE FILTER N
SELECT
N TO 1
MUX
OUTPUT
SIGNAL
SAMPLE
CLOCK
TRACKING
CIRCUIT
Figure 4. Polyphase Filter Bank Model—Conceptual Block
Diagram
The full set of subfilters can be considered to form a parallel
bank of “polyphase” filters which have decrementing, linear
phase group delays. All of the polyphase filters conceptually
process the input signal simultaneously, as illustrated in Figure
4, at the input sample rate.
Asynchronous sample rate conversion under the polyphase filter
bank model is accomplished by selecting the output of a particu-
lar polyphase filter on the basis of the temporal relationship
between the input sample clock and the output sample clock
events. Figure 5 shows the desired filter group delay as a func-
tion of the relative time difference between the current output
sample clock and the last input sample clock. If an output
sample is requested late in the input sample period, then a short
filter delay is required, and if an output sample is requested
early in the input sample period, then a long filter delay is re-
quired. This nonintuitive result arises from the fact that FIR
filters always produce some delay, so that selecting a filter with
shorter delay moves the interpolated sample closer to the newest
input sample.
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| AD1893JSTZRL | 功能描述:IC SAMPLE-RATE CONV 16BIT 44TQFP RoHS:是 类别:集成电路 (IC) >> 线性 - 音频处理 系列:SamplePort™ 其它有关文件:STA321 View All Specifications 标准包装:1 系列:Sound Terminal™ 类型:音频处理器 应用:数字音频 安装类型:表面贴装 封装/外壳:64-LQFP 裸露焊盘 供应商设备封装:64-LQFP EP（10x10） 包装:Digi-Reel® 其它名称:497-11050-6 |
| AD1895 | 制造商:AD 制造商全称:Analog Devices 功能描述:192 kHz Stereo Asynchronous Sample Rate Converter |
| AD1895AYRS | 制造商:Analog Devices 功能描述:Sample Rate Converter 28-Pin SSOP 制造商:Rochester Electronics LLC 功能描述:192KHZ 8:1 STEREO ASYNC SAMPLE RATE CONV - Bulk 制造商:Analog Devices 功能描述:IC STEREO ASR CONVERTER |
| AD1895AYRSRL | 制造商:Analog Devices 功能描述:Sample Rate Converter 28-Pin SSOP T/R |
| AD1895AYRSZ | 功能描述:IC CONV SAMPLE RATE ASYNC 28SSOP RoHS:是 类别:集成电路 (IC) >> 线性 - 音频处理 系列:- 其它有关文件:STA321 View All Specifications 标准包装:1 系列:Sound Terminal™ 类型:音频处理器 应用:数字音频 安装类型:表面贴装 封装/外壳:64-LQFP 裸露焊盘 供应商设备封装:64-LQFP EP（10x10） 包装:Digi-Reel® 其它名称:497-11050-6 |
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