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參數(shù)資料
| 型號(hào)： | ISL5216KI-1Z |
| 廠商： | INTERSIL CORP |
| 元件分類： | 無(wú)繩電話/電話 |
| 英文描述： | Four-Channel Programmable Digital DownConverter |
| 中文描述： | TELECOM, CELLULAR, BASEBAND CIRCUIT, PBGA196 |
| 封裝： | 15 X 15 MM, 1 MM PITCH, ROHS COMPLIANT, PLASTIC, BGA-196 |
| 文件頁(yè)數(shù)： | 12/65頁(yè) |
| 文件大?。?/td> | 1076K |
| 代理商： | ISL5216KI-1Z |
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12
July 8, 2005
integrators are slightly oversized to reduce the quantization
noise at each stage.
A CIC filter has a gain of R
N
, where R is the decimation factor
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
-45
. A 48 bit
barrel shifter then provides a gain of 2
0
to 2
47
inclusive
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
-45
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
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
section for
details.
ISL5216
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL5216KIZ | Four-Channel Programmable Digital DownConverter |
| ISL5216KI-1 | Four-Channel Programmable Digital DownConverter |
| ISL5216KI | Four-Channel Programmable Digital DownConverter |
| ISL5216 | Four-Channel Programmable Digital DownConverter |
| ISL5217EVAL1 | Quad Programmable Up Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL5216KIZ | 功能描述:上下轉(zhuǎn)換器 W/ANNEAL QD DIGTL DWNCNVRTR IND TEMP 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 |
| ISL5217 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Quad Programmable Up Converter |
| ISL5217_05 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Quad Programmable Up Converter |
| ISL5217EVAL1 | 功能描述:EVALUATION BOARD FOR ISL5217KI 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 |
| ISL5217KI | 功能描述:上下轉(zhuǎn)換器 196BGA,-40+85C PROGRAMMABLE QUAD UP CONVERTER 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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