参数资料
型号: MAX5858ECM+D
厂商: Maxim Integrated Products
文件页数: 8/23页
文件大小: 0K
描述: IC DAC 10BIT DUAL 300MSPS 48TQFP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 250
设置时间: 11ns
位数: 10
数据接口: 并联
转换器数目: 2
电压电源: 单电源
功率耗散(最大): 816mW
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 48-TQFP 裸露焊盘
供应商设备封装: 48-TQFP 裸露焊盘(7x7)
包装: 托盘
输出数目和类型: 2 电流,单极
采样率(每秒): 300M
MAX5858
Dual, 10-Bit, 300Msps, Current-Output DAC with
4x/2x/1x Interpolation Filters
16
______________________________________________________________________________________
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. MAX5858 in 4x Interpolation Mode
This example demonstrates that 4x interpolation with
digital filtering yields significant benefits in reducing
system complexity, improving dynamic performance
and lowering cost. Data can be written to the MAX5858
at much lower speeds while achieving image attenua-
tion greater than 60dB and image separation beyond
three octaves. The main benefit is in analog reconstruc-
tion filter design. Reducing the filter order eases
gain/phase matching while lowering filter cost and sav-
ing 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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