參數(shù)資料
型號: MAX5858AECM+D
廠商: Maxim Integrated Products
文件頁數(shù): 9/25頁
文件大?。?/td> 0K
描述: IC DAC 10BIT DUAL 300MSPS 48TQFP
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 250
設(shè)置時間: 11ns
位數(shù): 10
數(shù)據(jù)接口: 并聯(lián)
轉(zhuǎn)換器數(shù)目: 2
電壓電源: 單電源
功率耗散(最大): 816mW
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 48-TQFP 裸露焊盤
供應(yīng)商設(shè)備封裝: 48-TQFP 裸露焊盤(7x7)
包裝: 托盤
輸出數(shù)目和類型: 2 電流,單極
采樣率(每秒): 300M
MAX5858A
Dual, 10-Bit, 300Msps, DAC with 4x/2x/1x
Interpolation Filters and PLL
______________________________________________________________________________________
17
fOUT
20MHz
±10MHz
IMAGE
fDAC - fOUT
48MHz
IMAGE
fDAC + fOUT
108MHz
fDAC
78MHz
IMAGE SEPARATION = 18MHz
LESS THAN ONE OCTAVE
HIGH ORDER ANALOG FILTER
SOLUTION 1
fOUT
20MHz
BW =
±10MHz
IMAGE
fDAC - fOUT
210MHz
IMAGE
fDAC + fOUT
270MHz
fDAC
240MHz
LOWER ORDER
ANALOG FILTER
IMAGE SEPARATION = 180MHz
HIGH-SPEED CLK = 240MHz
SOLUTION 2
FREQUENCY AXIS NOT TO SCALE
fOUT
20MHz
BW =
±10MHz
IMAGE
fDAC - fOUT
256MHz
IMAGE
fDAC + fOUT
316MHz
fDAC
286MHz
fDATA
71.6MHz
SIMPLE ANALOG FILTER
NEW FIRST IMAGE SEPARATION > 3 OCTAVES
SOLUTION 3
FREQUENCY AXIS NOT TO SCALE
DIGITAL FILTER
ATTENUATION >60dB
Figure 3. MAX5858A in 4x Interpolation Mode
This example demonstrates that 4x interpolation with
digital filtering yields significant benefits in reducing sys-
tem complexity, improving dynamic performance and
lowering cost. Data can be written to the MAX5858A at
much lower speeds while achieving image attenuation
greater than 60dB and image separation beyond three
octaves. The main benefit is in analog reconstruction fil-
ter design. Reducing the filter order eases gain/phase
matching while lowering filter cost and saving board
space. Because the data rate is lowered to 71.6MHz,
the setup and hold times are manageable and the clock
signal source is simplified, which results in improved
system reliability and lower cost.
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