ADS1243
- 24 BITS NO MISSING CODES
- SIMULTANEOUS 50Hz AND 60Hz REJECTION (-90dB MINIMUM)
- 0.0015% INL
- 21 BITS EFFECTIVE RESOLUTION (PGA = 1), 19 BITS (PGA = 128)
- PGA GAINS FROM 1 TO 128
- SINGLE-CYCLE SETTLING
- PROGRAMMABLE DATA OUTPUT RATES
- EXTERNAL DIFFERENTIAL REFERENCE OF 0.1V TO 5V
- ON-CHIP CALIBRATION
- SPI™ COMPATIBLE
- 2.7V TO 5.25V SUPPLY RANGE
- 600µW POWER CONSUMPTION
- UP TO EIGHT INPUT CHANNELS
- UP TO EIGHT DATA I/O
- APPLICATIONS
- INDUSTRIAL PROCESS CONTROL
- LIQUID/GAS CHROMATOGRAPHY
- BLOOD ANALYSIS
- SMART TRANSMITTERS
- PORTABLE INSTRUMENTATION
- WEIGHT SCALES
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The ADS1242 and ADS1243 are precision, wide dynamic range, delta-sigma, analog-to-digital (A/D) converters with 24-bit resolution operating from 2.7V to 5.25V supplies. These delta-sigma, A/D converters provide up to 24 bits of no missing code performance and effective resolution of 21 bits.
The input channels are multiplexed. Internal buffering can be selected to provide a very high input impedance for direct connection to transducers or low-level voltage signals. Burnout current sources are provided that allow for the detection of an open or shorted sensor. An 8-bit digital-to-analog converter (DAC) provides an offset correction with a range of 50% of the FSR (Full-Scale Range).
The Programmable Gain Amplifier (PGA) provides selectable gains of 1 to 128 with an effective resolution of 19 bits at a gain of 128. The A/D conversion is accomplished with a second-order delta-sigma modulator and programmable FIR filter that provides a simultaneous 50Hz and 60Hz notch. The reference input is differential and can be used for ratiometric conversion.
The serial interface is SPI compatible. Up to eight bits of data I/O are also provided that can be used for input or output. The ADS1242 and ADS1243 are designed for high-resolution measurement applications in smart transmitters, industrial process control, weight scales, chromatography, and portable instrumentation.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | 24-Bit Analog-To-Digital Converters datasheet (Rev. H) | 2013/10/8 | |||
| 應用說明 | Digital Filter Types in Delta-Sigma ADCs (Rev. A) | PDF | HTML | 2023/3/29 | |||
| 應用說明 | Measuring Single-Ended 0V-5V Signals with Differential Delta-Sigma ADCs (Rev. A) | 2015/5/18 | ||||
| 應用說明 | The Offset DAC (Rev. A) | 2015/4/1 | ||||
| 電子書 | Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs | 2015/3/19 | ||||
| 應用說明 | Inputs Currents for High-Resolution ADCs | 2003/3/6 |
設計與開發
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ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
類比工程師的計算機旨在加速類比電路設計工程師定期使用的許多重複計算。此基於 PC 的工具提供圖形介面，列出各種常見計算，從使用回饋電阻器設定運算放大器增益到選擇適當的電路設計元件以穩定類比數位轉換器 (ADC) 驅動緩衝電路。
除了作為獨立工具使用外，此計算機還與類比工程師口袋參考中描述的概念相得益彰。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| TSSOP (PW) | 20 | Ultra Librarian |