ADS1278
- Simultaneously Measure Four/Eight Channels
- Up to 144kSPS Data Rate
- AC Performance:
70kHz Bandwidth
111dB SNR (High-Resolution Mode)
–108dB THD - DC Accuracy:
0.8µV/°C Offset Drift
1.3ppm/°C Gain Drift - Selectable Operating Modes:
High-Speed: 144kSPS, 106dB SNR
High-Resolution: 52kSPS, 111dB SNR
Low-Power: 52kSPS, 31mW/ch
Low-Speed: 10kSPS, 7mW/ch - Linear Phase Digital Filter
- SPI™ or Frame-Sync Serial Interface
- Low Sampling Aperture Error
- Modulator Output Option (digital filter bypass)
- Analog Supply: 5V
- Digital Core: 1.8V
- I/O Supply: 1.8V to 3.3V
- Vibration/Modal Analysis
- Multi-Channel Data Acquisition
- Acoustics/Dynamic Strain Gauges
- Pressure Sensors
PowerPAD is a trademark of Texas Instruments, Inc.
SPI is a trademark of Motorola, Inc.
All other trademarks are the property of their respective owners.
Based on the single-channel ADS1271, the ADS1274 (quad) and ADS1278 (octal) are 24-bit, delta-sigma (ΔΣ) analog-to-digital converters (ADCs) with data rates up to 144k samples per second (SPS), allowing simultaneous sampling of four or eight channels. The devices are offered in identical packages, permitting drop-in expandability.
Traditionally, industrial delta-sigma ADCs offering good drift performance use digital filters with large passband droop. As a result, they have limited signal bandwidth and are mostly suited for dc measurements. High-resolution ADCs in audio applications offer larger usable bandwidths, but the offset and drift specifications are significantly weaker than respective industrial counterparts. The ADS1274 and ADS1278 combine these types of converters, allowing high-precision industrial measurement with excellent dc and ac specifications.
The high-order, chopper-stabilized modulator achieves very low drift with low in-band noise. The onboard decimation filter suppresses modulator and signal out-of-band noise. These ADCs provide a usable signal bandwidth up to 90% of the Nyquist rate with less than 0.005dB of ripple.
Four operating modes allow for optimization of speed, resolution, and power. All operations are controlled directly by pins; there are no registers to program. The devices are fully specified over the extended industrial range (–40°C to +105°C) and are available in an HTQFP-64 PowerPAD™ package.
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | Quad/Octal, Simultaneous Sampling, 24-Bit Analog-to-Digital Converters 数据表 (Rev. F) | 2011年 2月 17日 | |||
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年 4月 13日 | |
电子书 | Fundamentals of Precision ADC Noise Analysis | 2020年 6月 19日 | ||||
白皮书 | Voltage-reference impact on total harmonic distortion | 2016年 8月 1日 | ||||
电子书 | Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs | 2015年 3月 19日 | ||||
模拟设计期刊 | 使用负输入电压的单电源全差动放大器驱动 ADC | 英语版 | 2011年 4月 4日 | |||
应用手册 | Analog Front-End Design for ECG Systems Using Delta-Sigma ADCs (Rev. A) | 2010年 4月 13日 | ||||
应用手册 | 所选封装材料的热学和电学性质 | 2008年 10月 16日 | ||||
应用手册 | 模数规格和性能特性术语表 (Rev. A) | 最新英语版本 (Rev.B) | 2008年 10月 16日 | |||
应用手册 | 高速数据转换 | 英语版 | 2008年 10月 16日 |
设计和开发
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封装 | 引脚 | CAD 符号、封装和 3D 模型 |
---|---|---|
HTQFP (PAP) | 64 | Ultra Librarian |
订购和质量
- RoHS
- REACH
- 器件标识
- 引脚镀层/焊球材料
- MSL 等级/回流焊峰值温度
- MTBF/时基故障估算
- 材料成分
- 鉴定摘要
- 持续可靠性监测
- 制造厂地点
- 封装厂地点
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