ADS1218
- 24 BITS NO MISSING CODES
- 0.0015% INL
- 22 BITS EFFECTIVE RESOLUTION (PGA = 1), 19 BITS (PGA = 128)
- 4K BYTES OF FLASH MEMORY PROGRAMMABLE FROM 2.7V TO 5.25V
- PGA FROM 1 TO 128
- SINGLE CYCLE SETTLING MODE
- PROGRAMMABLE DATA OUTPUT RATES UP TO 1kHz
- PRECISION ON-CHIP 1.25V/2.5V REFERENCE:
ACCURACY: 0.2%
DRIFT: 5ppm/°C - EXTERNAL DIFFERENTIAL REFERENCE OF 0.1V TO 2.5V
- ON-CHIP CALIBRATION
- PIN-COMPATIBLE WITH ADS1216
- SPI™ COMPATIBLE
- 2.7V TO 5.25V
- < 1mW POWER CONSUMPTION
- APPLICATIONS
- INDUSTRIAL PROCESS CONTROL
- LIQUID/GAS CHROMATOGRAPHY
- BLOOD ANALYSIS
- SMART TRANSMITTERS
- PORTABLE INSTRUMENTATION
- WEIGHT SCALES
- PRESSURE TRANSDUCERS
SPI is a trademark of Motorola.
All trademarks are the property of their respective owners.
The ADS1218 is a precision, wide dynamic range, delta-sigma, Analog-to-Digital (A/D) converter with 24-bit resolution and Flash memory operating from 2.7V to 5.25V supplies. The delta-sigma, A/D converter provides up to 24 bits of no missing code performance and effective resolution of 22 bits.
The eight 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 (D/A) converter provides an offset correction with a range of 50% of the FSR (Full-Scale Range).
The PGA (Programmable Gain Amplifier) 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 sinc filter. The reference input is differential and can be used for ratiometric conversion. The on-board current DACs (Digital-to-Analog Converters) operate independently with the maximum current set by an external resistor.
The serial interface is SPI-compatible. Eight bits of digital I/O are also provided that can be used for input or output. The ADS1218 is designed for high-resolution measurement applications in smart transmitters, industrial process control, weight scales, chromatography, and portable instrumentation.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | 8-Channel, 24-Bit, Analog-to-Digital Converter with FLASH Memory datasheet (Rev. C) | 2005. 9. 26 | ||
| 애플리케이션 노트 | Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs (Rev. A) | PDF | HTML | 2024. 3. 18 | ||
| 애플리케이션 노트 | Digital Filter Types in Delta-Sigma ADCs (Rev. A) | PDF | HTML | 2023. 3. 29 | ||
| e북 | Fundamentals of Precision ADC Noise Analysis (Rev. A) | 2020. 6. 19 | |||
| 애플리케이션 노트 | Measuring Temperature with the ADS1216, ADS1217, or ADS1218 (Rev. B) | 2017. 11. 16 | |||
| 애플리케이션 노트 | Measuring Single-Ended 0V-5V Signals with Differential Delta-Sigma ADCs (Rev. A) | 2015. 5. 18 | |||
| 애플리케이션 노트 | The Offset DAC (Rev. A) | 2015. 4. 1 | |||
| e북 | Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs | 2015. 3. 19 | |||
| 애플리케이션 노트 | Calibration Routines and Register Value Generation for the ADS121x Series | 2003. 6. 19 | |||
| 애플리케이션 노트 | Inputs Currents for High-Resolution ADCs | 2003. 3. 6 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
아날로그 엔지니어의 계산기는 아날로그 회로 설계 엔지니어가 정기적으로 사용하는 많은 반복 계산의 속도를 높이도록 설계되었습니다. 이 PC 기반 툴은 피드백 저항을 사용한 연산 증폭기 게인 설정부터 아날로그-디지털 컨버터(ADC) 드라이브 버퍼 회로 안정화를 위한 적절한 회로 설계 요소 선택에 이르기까지 다양한 일반적인 계산 목록이 포함된 그래픽 인터페이스를 제공합니다.
이 계산기는 독립 실행형 툴로 유용할 뿐만 아니라 아날로그 엔지니어의 포켓 레퍼런스에 설명된 개념과도 잘 어울립니다.
ADC-DAC-TO-VREF-SELECT-DESIGN-TOOL — The ADC-TO-VREF-SELECT tool enables the pairing of TI ADCs, DACs, and series voltage references.
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| TQFP (PFB) | 48 | Ultra Librarian |