The ADS1287 device is a low-power, analog-to-digital converter (ADC), with an integrated programmable gain amplifier (PGA) and finite-impulse-response (FIR) digital filter. The ADC is suitable for the demanding needs of seismic equipment requiring precision digitizing with low power consumption.
The ADC features a programmable-gain, high-impedance complementary metal oxide semiconductor (CMOS) amplifier, suitable for direct connection of geophone and hydrophone sensors to the ADC over a wide range of input signals (±2.5 V to ±0.156 V).
The ADC incorporates a fourth-order, inherently stable, delta-sigma (ΔΣ) modulator. The modulator digital output is filtered and decimated by the internal FIR digital filter to yield the ADC conversion result.
The FIR digital filter provides data rates up to 1000 samples per second (SPS). The high-pass filter (HPF) removes DC and low frequency components from the conversion result. On-chip gain and offset scaling registers support system calibration.
Together, the amplifier, modulator, and digital filter dissipate 4.5 mW in high-resolution mode (2.4 mW in low-power mode). The ADC is packaged in a compact 5-mm × 4-mm VQFN package. The ADC is fully specified over the –40°C to +85°C temperature range.
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 날짜 |
|---|---|---|---|---|
| * | Data sheet | ADS1287 Low-Power, 1000-SPS, Wide-Bandwidth, Analog-to-Digital Converter With Programmable Gain Amplifier datasheet (Rev. B) | PDF | HTML | 2019/08/27 |
| Application note | Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs (Rev. A) | PDF | HTML | 2024/03/18 | |
| Application note | QFN and SON PCB Attachment (Rev. C) | PDF | HTML | 2023/12/06 | |
| Application note | Digital Filter Types in Delta-Sigma ADCs (Rev. A) | PDF | HTML | 2023/03/29 | |
| E-book | Fundamentals of Precision ADC Noise Analysis (Rev. A) | 2020/06/19 |
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The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| VQFN (RHF) | 24 | Ultra Librarian |
Calculator installer
General calculator tool for analog design support.
This is the first release of this tool.