參數(shù)資料
型號(hào)： ADS5240IPAPG4
元件分類： ADC
英文描述： 4-Channel, 12-Bit, 40MSPS ADC with Serial LVDS Interface
中文描述： 4通道，12位，40MSPS的ADC的串行LVDS接口
文件頁(yè)數(shù)： 20/24頁(yè)
文件大?。?/td> 418K
代理商： ADS5240IPAPG4
www.ti.com
POWER-DOWN MODE
The ADS5240 has a power-down pin, PD. Pulling PD
high causes the device to enter the power-down
mode. In this mode, the reference and clock circuitry
as well as all the channels are powered down. Device
power consumption drops to less than 100mW in this
mode. Individual channels can also be selectively
powered down by programming registers.
LAYOUT OF PCB WITH PowerPAD
THERMALLY-ENHANCED PACKAGES
The ADS5240 is housed in an 64-lead PowerPAD
thermally-enhanced package. To make optimum use
of
the
thermal
efficiencies
PowerPAD package, the printed circuit board (PCB)
must be designed with this technology in mind.
Please refer to PowerPAD brief SLMA004
PowerPAD
Made Easy
(refer to our web site at www.ti.com),
which addresses the specific considerations required
when integrating a PowerPAD package into a PCB
design. For more detailed information, including ther-
mal modeling and repair procedures, please see
technical
brief
SLMA002,
mally-Enhanced Package
(available for download at
www.ti.com).
CONNECTING HIGH-SPEED,
MULTI-CHANNEL ADCs TO XILINX FPGAs
A separate application note (XAPP774) describing
how to connect TI's high-speed, multi-channel ADCs
with serial LVDS outputs to XILINX FPGAs can be
downloaded
directly
from
(http://www.xilinx.com).
SUPPLY SEQUENCE
The following supply sequence is recommended for
powering up the device:
1. AVDD is powered up.
2. LVDD is powered up.
ADS5240
SBAS326C–JUNE 2004–REVISED DECEMBER 2004
It is recommended that the isolation be maintained
onboard by using separate supplies to drive AVDD
and LVDD, as well as separate ground planes for
AVSS and LVSS.
If this sequencing is not possible, then it is rec-
ommended that AVDD and LVDD be powered up
simultaneously.
After the supplies have stabilized, it is required to
give the device an active RESET pulse. This results
in all internal registers getting reset to their default
value of 0 (inactive). Without RESET, it is possible
that some registers might be in their non-default state
on
power-up.
This
could
malfunction.
The use of LVDS buffers reduces the injected noise
considerably, compared to CMOS buffers. The cur-
rent in the LVDS buffer is independent of the direction
of switching. Also, the low output swing as well as the
differential nature of the LVDS buffer results in
low-noise coupling.
cause
the
device
to
designed
into
the
The ADS5240 also has an internal circuit that moni-
tors the state of stopped clocks. If ADCLK is stopped
(or if it runs at a speed < 3MHz), this monitoring
circuit generates a logic signal that puts the device in
a power-down state. As a result, the power consump-
tion of the device is reduced when ADCLK is
stopped. This circuit can also be disabled using
register options.
PowerPAD
Ther-
the
XILINX
website
During the power-up ramp, the AVDD and LVDD
supplies should track each other to within 0.6V.
20
相關(guān)PDF資料
PDF描述
ADS5240IPAPT 4-Channel, 12-Bit, 40MSPS ADC with Serial LVDS Interface
ADS5240IPAPTG4 4-Channel, 12-Bit, 40MSPS ADC with Serial LVDS Interface
ADS5270 8-Channel, 12-Bit, 40MSPS ADC with Serial LVDS Interface
ADS5270IPFP 8-Channel, 12-Bit, 40MSPS ADC with Serial LVDS Interface
ADS5270IPFPT 8-Channel, 12-Bit, 40MSPS ADC with Serial LVDS Interface
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADS5240IPAPT 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 4-Ch 12-bit 40MSPS w/Ser LVDS Interface RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS5240IPAPTG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 4-Ch 12-bit 40MSPS w/Ser LVDS Interface RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS5242 制造商:TI 制造商全稱:Texas Instruments 功能描述:4-Channel, 12-Bit, 65MSPS Analog-to-Digital Converter with Serial LVDS Interface
ADS5242EVM 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開(kāi)發(fā)工具 ADS5242 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評(píng)估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V
ADS5242IPAP 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 4-Ch 12-bit 65MSPS w/Ser LVDS Interface RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
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