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參數(shù)資料
| 型號(hào)： | ISL5216 |
| 廠商： | Intersil Corporation |
| 英文描述： | Four-Channel Programmable Digital DownConverter |
| 中文描述： | 四通道可編程數(shù)字下變頻器 |
| 文件頁(yè)數(shù)： | 12/65頁(yè) |
| 文件大?。?/td> | 1384K |
| 代理商： | ISL5216 |
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12
integrators are slightly oversized to reduce the quantization
noise at each stage.
A CIC filter has a gain of R
and N is the number of stages. Because the CIC filter gain
can become very large with decimation, an attenuator is
provided ahead of the CIC to prevent overflow. The 24 bits of
sample data are placed on the low 24 bits of a 69 bit bus
(width of the first CIC integrator) for a gain of 2
barrel shifter then provides a gain of 2
before passing the data to the CIC. The overall gain in the
pre-CIC attenuator can therefore be programmed to be any
one of 48 values from 2
to 4, inclusive (see IWA=*004,
bits 19:14). This shift factor is adjusted to keep the total
barrel shifter and CIC filter gain between 0.5 and 1.0. The
N
, where R is the decimation factor
-45
. A 48 bit
inclusive
0
to 2
47
-45
equation which should be used to compute the necessary
shift factor is:
Shift Factor = 45 - Ceiling(log
2
(R
N
)).
CIC barrel shifts of greater than 45 will cause MSB bits to be
lost. Most of the floating point modes on the ISL5216 make
use of the CIC barrel shifter for gain. This limits the
maximum usable decimation. In particular, shift factor minus
maximum exponent must be greater than or equal to zero.
Maximum exponent ranges from 0 to 1, 3, or 7 for 1, 2 and 3
exponent bits, representing up to 6, 18, or 42dB of gain,
respectively. See
Floating Point Input Mode
details.
section for
ISL5216
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL5217EVAL1 | Quad Programmable Up Converter |
| ISL5217KI | Quad Programmable Up Converter |
| ISL5217 | Quad Programmable Up Converter |
| ISL5217KIZ | Quad Programmable Up Converter |
| ISL5314INZ | Direct Digital Synthesizer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL5216_05 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Four-Channel Programmable Digital DownConverter |
| ISL5216_07 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Four-Channel Programmable Digital Downconverter |
| ISL5216EVAL1 | 功能描述:EVALUATION BOARD FOR ISL5216KI RoHS:是 類別:RF/IF 和 RFID >> RF 評(píng)估和開發(fā)套件，板 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類型:GPS 接收器 頻率:1575MHz 適用于相關(guān)產(chǎn)品:- 已供物品:模塊 其它名稱:SER3796 |
| ISL5216KI | 功能描述:上下轉(zhuǎn)換器 QUAD DIGITAL DOWNCONVERTER,IND TEMP,0.8M RoHS:否 制造商:Texas Instruments 產(chǎn)品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-128 |
| ISL5216KI-1 | 功能描述:上下轉(zhuǎn)換器 QUAD DIGITAL DOWNCONVERTER,IND TEMP,1.OMM PITCH BGA PACKAG RoHS:否 制造商:Texas Instruments 產(chǎn)品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-128 |
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