- 您现在的位置：买卖IC网 > PDF目录19022 > DC1370A-L (Linear Technology)BOARD DEMO 25MSPS LTC2256-12 PDF资料下载
参数资料
| 型号： | DC1370A-L |
| 厂商： | Linear Technology |
| 文件页数： | 17/34页 |
| 文件大小： | 0K |
| 描述： | BOARD DEMO 25MSPS LTC2256-12 |
| 软件下载： | QuikEval II System |
| 设计资源： | DC1370A Design Files |
| 标准包装： | 1 |
| 系列： | * |
| 相关产品： | DC718C-ND - DEMO QUIKEVAL-II DATA |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页当前第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页
LTC2258-12
LTC2257-12/LTC2256-12
24
225812fd
For more information www.linear.com/LTC2258-12
Digital Output Randomizer
Interference from the A/D digital outputs is sometimes
unavoidable.Digitalinterferencemaybefromcapacitiveor
inductive coupling or coupling through the ground plane.
Even a tiny coupling factor can cause unwanted tones
in the ADC output spectrum. By randomizing the digital
output before it is transmitted off chip, these unwanted
tones can be randomized which reduces the unwanted
tone amplitude.
The digital output is “randomized” by applying an
exclusive-OR logic operation between the LSB and all
other data output bits. To decode, the reverse opera-
tion is applied—an exclusive-OR operation is applied
between the LSB and all other bits. The LSB, OF and
CLKOUT outputs are not affected. The output random-
izer is enabled by serially programming mode control
register A4.
Alternate Bit Polarity
Another feature that reduces digital feedback on the circuit
board is the alternate bit polarity mode. When this mode
is enabled, all of the odd bits (D1, D3, D5, D7, D9, D11)
are inverted before the output buffers. The even bits (D0,
D2, D4, D6, D8, D10), OF and CLKOUT are not affected.
This can reduce digital currents in the circuit board ground
plane and reduce digital noise, particularly for very small
analog input signals.
When there is a very small signal at the input of the A/D
thatiscenteredaroundmidscale,thedigitaloutputstoggle
between mostly 1s and mostly 0s. This simultaneous
switchingofmostofthebitswillcauselargecurrentsinthe
ground plane. By inverting every other bit, the alternate bit
polarity mode makes half of the bits transition high while
half of the bits transition low. To first order, this cancels
currentflowinthegroundplane,reducingthedigitalnoise.
applicaTions inForMaTion
CLKOUT
OF
D11/D0
D10/D0
D2/D0
D1/D0
D0
225812 F15
OF
D11
D10
D2
D1
D0
RANDOMIZER
ON
D11
FPGA
PC BOARD
D10
D2
D1
D0
225812 F15
D0
D1/D0
D2/D0
D10/D0
D11/D0
OF
CLKOUT
LTC2258-12
Figure 15. Functional Equivalent of Digital Output Randomizer
Figure 16. Unrandomizing a Randomized Digital
Output Signal
相关PDF资料 |
PDF描述 |
|---|---|
| KK3270045 | OSCILLATOR 32.768 KHZ SMD |
| 74 | LAMP T 1-3/4 |
| 393 | LAMP INCAND T1-3/4 MIDGE GROOVE |
| LC1ALG | FLUORESCENT TASK LIGHT |
| 398 | LAMP INCAND T1-3/4 MIDGE GROOVE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DC1370A-M | 制造商:Linear Technology 功能描述:14BIT ADC Eval Brd, Rq. DC718 制造商:Linear Technology 功能描述:14BIT ADC Eval Brd, Rq. DC718; Silicon Manufacturer:Linear Technology; Silicon Core Number:LTC2262-14; Kit Application Type:Data Converter; Application Sub Type:ADC; Kit Contents:Board, Guide; Features:Also works with requred DC718 |
| DC1370A-N | 制造商:Linear Technology 功能描述:12BIT ADC Eval Brd, Rq. DC718 制造商:Linear Technology 功能描述:12BIT ADC Eval Brd, Rq. DC718; Silicon Manufacturer:Linear Technology; Silicon Core Number:LTC2262-12; Kit Application Type:Data Converter; Application Sub Type:ADC; Kit Contents:Board, Guide; Features:Also works with requred DC718 |
| DC1371A | 功能描述:BOARD USB DATA ACQUISITION HS RoHS:是 类别:未定义的类别 >> 其它 系列:* 标准包装:1 系列:* 其它名称:MS305720A |
| DC1379A | 功能描述:BOARD EVAL LTM8025 RoHS:否 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:µModule® 标准包装:1 系列:- 主要目的:DC/DC，步降 输出及类型:1，非隔离 功率 - 输出:- 输出电压:3.3V 电流 - 输出:3A 输入电压:4.5 V ~ 28 V 稳压器拓扑结构:降压 频率 - 开关:250kHz 板类型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名称:497-12113STEVAL-ISA094V1-ND |
| DC1379B | 制造商:Linear Technology 功能描述:BOARD EVAL LTM8025 制造商:Linear Technology 功能描述:EVAL BOARD, LTM8025 BUCK REGULATOR, Silicon Manufacturer:Linear Technology, Silicon Core Number:LTM8025, Kit Application Type:Power Management - Voltage Regulator, Application Sub Type:Synchronous Buck Regulator , RoHS Compliant: NA |
发布紧急采购，3分钟左右您将得到回复。