ADS1281 高精度 24 位模数转换器
ADS1281 相关产品
- ADS1282 - 器件与被比较器件具有相似功能，但并不功能等效。 4 channel version of ADS1281. Has onboard PGA
- ADS1271 - 器件与被比较器件具有相似功能，但并不功能等效。 Has a lower sampling rate
- ADS1274 - 器件与被比较器件具有相似功能，但并不功能等效。 4 channel device. Lower sampling rate
| ADS1281 | ADS1282 | |
| Resolution(Bits) | 31 | 31 |
| Sample Rate (max) | 4kSPS | 4kSPS |
| Architecture | Delta-Sigma | Delta-Sigma |
| Power Consumption(Typ)(mW) | 12 | 27 |
| SNR(dB) | 130 | 130 |
| SNR(Typ)(dB) | 130 | 130 |
| SFDR(dB) | 123 | 123 |
| DNL(Max)(+/-LSB) | 1 | 1 |
| INL(Max)(+/-LSB) | 0.00006% | 0.00006% |
| No Missing Codes(Bits) | 31 | 31 |
| No. of Supplies | 2 | 2 |
| Analog Voltage AV/DD(Min)(V) | 4.75 | 4.75 |
| Analog Voltage AV/DD(Max)(V) | 5.25 | 5.25 |
| Logic Voltage DV/DD(Min)(V) | 1.65 | 1.65 |
| Logic Voltage DV/DD(Max)(V) | 3.6 | 3.6 |
| Input Configuration Range | 0.5Vref | 0.5Vref/PGA |
| Reference Mode | Ext | Ext |
| Rating | Catalog | Catalog |
| Pin/Package | 24TSSOP | 28TSSOP |
| # Input Channels | 1 | 2 |
The ADS1281 is an extremely high-performance, single-chip analog-to-digital converter (ADC) designed for the demanding needs of energy exploration and seismic monitoring environments. The single-chip design promotes board area savings for improvements in high-density applications.
The converter uses a fourth-order, inherently stable, delta-sigma (
) modulator that provides outstanding noise and linearity performance. The modulator is used either in conjunction with the on-chip digital filter, or can be bypassed for use with post-processing filters.
The digital filter consists of sinc and finite impulse response (FIR) low-pass stages followed by an infinite impulse response (IIR) high-pass filter (HPF) stage. Selectable decimation provides data rates from 250 to 4000 samples per second (SPS).
ADS1281 特性
- High Resolution:
- 130dB SNR (250SPS)
- 127dB SNR (500SPS)
- High Accuracy:
- THD: –122dB (typ), –115dB (max)
- INL: 0.6ppm
- Inherently Stable Modulator with Fast Responding Over-Range Detection
- Flexible Digital Filter:
- Sinc + FIR + IIR (Selectable)
- Linear or Minimum Phase Response
- Programmable High-Pass Filter
- Selectable FIR Data Rates:
- 250SPS to 4kSPS
- Filter Bypass Option
- Low Power Consumption:
- Operating: 12mW
- Shutdown: 10uW
- Calibration Engine for Offset and Gain Correction
- SYNC Input
- Analog Supply
ADS1281 芯片订购指南
| 器件 | 状态 | 价格（美元） | 封装 | 引脚 | 封装数量 | 封装载体 |
| ADS1281IPW | ACTIVE | 34.50 | 1ku | TSSOP (PW) | 24 | 60 | TUBE |
| ADS1281IPWG4 | ACTIVE | 34.50 | 1ku | TSSOP (PW) | 24 | 60 | TUBE |
| ADS1281IPWR | ACTIVE | 28.75 | 1ku | TSSOP (PW) | 24 | 2000 | LARGE T&R |
| ADS1281IPWRG4 | ACTIVE | 28.75 | 1ku | TSSOP (PW) | 24 | 2000 | LARGE T&R |
ADS1281 工具与软件
| 名称 | 型号 | 公司 | 工具/软件类型 |
| 用于模数转换器的抗混淆计算工具 | ANTIALIASINGCALC | Texas Instruments | 计算实用程序 |
| 运算放大器至 ADC 电路拓扑计算器 | ADC-INPUT-CALC | Texas Instruments | 计算实用程序 |
| ADCProTM 模数转换器评估软件 | ADCPRO | Texas Instruments | 应用软件 |
ADS1282 质量与无铅数据
| 器件 | 环保计划* | 铅/焊球涂层 | MSL 等级/回流焊峰 | 环保信息与无铅 (Pb-free) | DPPM / MTBF / FIT 率 |
| ADS1281IPW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | ADS1281IPW | ADS1281IPW |
| ADS1281IPWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | ADS1281IPWG4 | ADS1281IPWG4 |
| ADS1281IPWR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | ADS1281IPWR | ADS1281IPWR |
| ADS1281IPWRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | ADS1281IPWRG4 | ADS1281IPWRG4 |
ADS1281 应用技术支持与电子电路设计开发资源下载
- ADS1281 数据资料 dataSheet 下载.PDF
- TI 德州仪器仪ADC 模数转换器产品选型与价格 . xls
- 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
- 所选封装材料的热学和电学性质 (PDF 645 KB)
- 高速数据转换 (PDF 1967 KB)
- Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
- A Spreadsheet for Calculating the Frequency Response of the ADS1250-54 (PDF 461 KB)
- A Spreadsheet for Calculating the Frequency Response of the ADS1250-54
- Understanding the ADS1251, ADS1253, and ADS1254 Input Circuitry (PDF 39 KB)
- Analog-to-Digital Converter Grounding Practices Affect System Performance (PDF 56 KB)
- Principles of Data Acquisition and Conversion (PDF 50 KB)
- Interleaving Analog-to-Digital Converters (PDF 64 KB)
- What Designers Should Know About Data Converter Drift (PDF 95 KB)
- Giving Delta-Sigma Converters a Gain Boost with a Front End Analog Gain Stage (PDF 70 KB)
- Programming Tricks for Higher Conversion Speeds Utilizing Delta Sigma Converters (PDF 105 KB)