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參數(shù)資料
| 型號： | 9042RPFI |
| 廠商： | MAXWELL TECHNOLOGIES |
| 元件分類： | ADC |
| 英文描述： | 12-Bit, 41 MSPS A/D Converter |
| 中文描述： | 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, DFP28 |
| 封裝： | RAD PAK, LDFP-28 |
| 文件頁數(shù)： | 22/26頁 |
| 文件大?。?/td> | 396K |
| 代理商： | 9042RPFI |
M
22
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
Another option for ac-coupling is a transformer. The impedance ratio and frequency characteristics of the transformer
are determned by examning the characteristics of the input signal source (transformer primary connection), and the
9042 input characteristics (transformer secondary connection). “RT” should be chosen to satisfy termnation require-
ments of thesource, given the transformer turns ratio. A blocking capacitor is required to prevent 9042 dc bias currents
fromflowing through the transformer.
Figure 28. Transformer-Coupled Analog Input Signal
When calculating the proper termnation resistor, note that the external load resistor is in parallel with the 9042 analog
input resistance, 250 ohms. The external resistor value can be calculated fromthe following equation:
where Z is desired impedance.
9042
A dc-coupled input configuration (shown below) is limted by the drive amplifier performance. The 9042’s on-chip refer-
ence is buffered using the OP279 dual, rail-to-rail operational amplifier. The resulting voltage is combined with the
analog source using an AD9631. Pending improvements in drive amplifiers, this dc-coupled approach is limted to ~75
dB–80 dB of dynamc performance depending on which drive amplifier is used. The AD9631 and OP279 run off ±5 V.
Figure 29. DC-Coupled Analog Input Circuit
相關PDF資料 |
PDF描述 |
|---|---|
| 9042RPFK | 12-Bit, 41 MSPS A/D Converter |
| 904BC | Super Flux LEDs |
| 904HUYLC | Super Flux LEDs |
| 904HW | Super Flux LEDs |
| 904SGC | Super Flux LEDs |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 9042RPFK | 制造商:MAXWELL 制造商全稱:Maxwell Technologies 功能描述:12-Bit, 41 MSPS A/D Converter |
| 904-2-T43-1-MTF-LR0-0-0-0-0A03 | 制造商:MPE-Garry GmbH 功能描述: |
| 9043 | 功能描述:電路板硬件 - PCB FEMALE SUPPORT .500" NYLON UL 94V-0 RoHS:否 制造商:Harwin 類型:Shield Clip 長度:9.4 mm 螺紋大小: 外徑: 材料:Beryllium Copper 電鍍:Tin |
| 90-43 | 制造商:Coilcraft Inc 功能描述: |
| 904-300 | 功能描述:電路板硬件 - PCB BIVAR NYLON TUBULAR SPACER RoHS:否 制造商:Harwin 類型:Shield Clip 長度:9.4 mm 螺紋大小: 外徑: 材料:Beryllium Copper 電鍍:Tin |
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