參數(shù)資料
型號(hào): 9042
廠(chǎng)商: Maxwell Technologies, Inc
英文描述: 12-Bit, 41 MSPS A/D Converter
中文描述: 12位,41 MSPS的A / D轉(zhuǎn)換
文件頁(yè)數(shù): 23/26頁(yè)
文件大?。?/td> 396K
代理商: 9042
M
23
All data sheets are subject to change without notice
2005 Maxwell Technologies
All rights reserved.
12-Bit, 41 MSPS A/D Converter
9042
01.07.05 REV 7
Power Supplies
Care should be taken when selecting a power source. Linear supplies are strongly recommended as switching sup-
plies tend to have radiated components that may be “received” by the 9042. Each of the power supply pins should be
decoupled as closely to the package as possible using 0.1 mF chip capacitors. The 9042 has separate digital and ana-
log +5 V pins. The analog supplies and the denoted A
VCC
digital supply pins are denoted D
VCC
. Although analog and
digital supplies may be tied together, best performance is achieved when the supplies are separate. This is because
the fast digital output swings can couple switching noise back into the analog supplies. Note that A
VCC
must be held
within 5% of 5 volts, however the D
VCC
supply may be varied according to output digital logic famly (i.e., D
VCC
should
be connected to the supply for the digital circuitry).
Output Loading
Care must be taken when designing the data receivers for the AD9042. It is recommended that the digital outputs
drive a series resistor of 499 ohms followed by a CMOS gate like the 74AC574. To mnimze capacitive loading, there
should only be one gate on each output pin. The digital outputs of the 9042 have a unique constant slew rate output
stage. The output slew rate is about 1 V/ns independent of output loading. A typical CMOS gate combined with PCB
trace and through hole will have a load of approximately 10 pF. Therefore as each bit switches, 10 mA
of dynamc current per bit will flow in or out of the device. A full- scale transition can cause up to 120 mA (12bits ′10
mA/bit) of current to flow through the digital output stage. The series resistor will mnimze the output currents that can
flow in the output stage. These switching currents are confined between ground and the D
VCC
pin. Standard TTL gates
should be avoided since they can appreciably add to the dynamc switching currents of the 9042.
相關(guān)PDF資料
PDF描述
9042RPFE 12-Bit, 41 MSPS A/D Converter
9042RPFH 12-Bit, 41 MSPS A/D Converter
9042RPFI 12-Bit, 41 MSPS A/D Converter
9042RPFK 12-Bit, 41 MSPS A/D Converter
904BC Super Flux LEDs
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
90-42 制造商:COILCRAFT 制造商全稱(chēng):Coilcraft lnc. 功能描述:Axial Lead Chokes
9042 LINE UPL1111-1-62-253-B 制造商:n/a 功能描述:Breaker Assy
904-200 功能描述:支架與墊片 Plastic Spcr .2 in Nylon White RoHS:否 制造商:Schurter 類(lèi)型:Transipillar Spacers 長(zhǎng)度:16 m 螺紋大小:M4 外徑:10 mm 材料:Nylon with Steel 電鍍:Zinc
9042000000 功能描述:STRIPSY RED LINE RoHS:是 類(lèi)別:未定義的類(lèi)別 >> 其它 系列:* 標(biāo)準(zhǔn)包裝:1 系列:* 其它名稱(chēng):MS305720A
90420-0002 功能描述:集管和線(xiàn)殼 Molok Pn Cont Hdr Ls LsePce SAu Plt 2Ckt RoHS:否 產(chǎn)品種類(lèi):1.0MM Rectangular Connectors 產(chǎn)品類(lèi)型:Headers - Pin Strip 系列:DF50 觸點(diǎn)類(lèi)型:Pin (Male) 節(jié)距:1 mm 位置/觸點(diǎn)數(shù)量:16 排數(shù):1 安裝風(fēng)格:SMD/SMT 安裝角:Right 端接類(lèi)型:Solder 外殼材料:Liquid Crystal Polymer (LCP) 觸點(diǎn)材料:Brass 觸點(diǎn)電鍍:Gold 制造商:Hirose Connector