ADS1245
- 20-Bit Effective Resolution
- High-Impedance Buffered Input
- ±2.5V Differential Input Range
- Pin-Compatible with ADS1244
- 0.0006% INL (typ), 0.0015% INL (max)
- Simple Two-Wire Serial Interface
- Simultaneous 50Hz and 60Hz Rejection
- Single Conversions with Sleep Mode
- Single-Cycle Settling
- Self-Calibration
- Well Suited for Multi-Channel Systems
- Easily Connects to the MSP430
- Current Consumption: 158µA
- Analog Supply: 2.5V to 5.25V
- Digital Supply: 1.8V to 3.6V
- APPLICATIONS
- Hand-Held Instrumentation
- Portable Medical Equipment
- Industrial Process Control
- Test and Measurement Systems
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The ADS1245 is a 24-bit, delta-sigma analog-to-digital converter (ADC). It offers excellent performance and very low power in an MSOP-10 package and is well suited for demanding high-resolution measurements, especially in portable and other space- and power-constrained systems.
The buffered input presents an impedance of 3G
, minimizing measurement errors when using high-impedance sources. The ADS1245 is compatible with ADS1244 and offers a direct upgrade path for designs requiring higher input impedance.
A third-order delta-sigma (
) modulator and digital filter form the basis of the ADC. The analog modulator has a ±2.5V differential input range. The digital filter rejects both 50Hz and 60Hz signals, completely settles in one cycle, and outputs data at 15 samples per second (SPS).
A simple, two-wire serial interface provides all the necessary control. Data retrieval, self-calibration, and Sleep mode are handled with a few simple waveforms. When only single conversions are needed, the ADS1245 can be shut down (Sleep mode) while idle between measurements to dramatically reduce the overall power dissipation. Multiple ADS1245s can be connected together to create a synchronously sampling multichannel measurement system. The ADS1245 is designed to easily connect to microcontrollers, such as the MSP430.
The ADS1245 supports 2.5V to 5.25V analog supplies and 1.8V to 3.6V digital supplies. Power is typically less than 470µW in normal operation and less than 1µW during Sleep mode.
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技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | ADS1245: Low-Power, 24-Bit Analog-to-Digital Converter 数据表 (Rev. A) | 2003-8-14 | |||
| 应用手册 | Δ-Σ ADC 中的数字滤波器类型 (Rev. A) | PDF | HTML | 英语版 (Rev.A) | PDF | HTML | 2023-4-13 | |
| 电子书 | Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs | 2015-3-19 | ||||
| 应用手册 | Data Capture with Multiple ADS1244 or ADS1245 Devices in Parallel | 2004-6-2 | ||||
| 应用手册 | Inputs Currents for High-Resolution ADCs | 2003-3-6 |
设计与开发
如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。
ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
模拟工程师计算器旨在加快模拟电路设计工程师经常运用的许多重复性计算。该基于 PC 的工具提供图形界面，其中显示各种常见计算列表，从使用反馈电阻器设置运算放大器增益到选择合适的电路设计元件，以稳定模数转换器 (ADC) 驱动器缓冲器电路。
除了可用作独立工具之外，该计算器还能很好地与模拟工程师口袋参考中所述的概念配合使用。
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| VSSOP (DGS) | 10 | Ultra Librarian |