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ADS1287D

現行

適用地震和能源勘探，具有 PGA 的低功率 1-kSPS 2 通道 (同步) ΔΣ ADC

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產品規格表

ADS1287D

現行
產品規格表 立即訂購

產品詳細資料

Resolution (Bits) 24 Sample rate (max) (ksps) 1 Number of input channels 2 Interface type SPI Architecture Delta-Sigma Input type Differential Multichannel configuration Simultaneous Sampling Rating Catalog Reference mode External Input voltage range (max) (V) 1.15, 3.75 Input voltage range (min) (V) -1.6, 1 Features PGA Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 4.4 Analog supply voltage (min) (V) -2.5, 0 Analog supply voltage (max) (V) 2.5, 5 Digital supply (min) (V) 2.25 Digital supply (max) (V) 3.6
Resolution (Bits) 24 Sample rate (max) (ksps) 1 Number of input channels 2 Interface type SPI Architecture Delta-Sigma Input type Differential Multichannel configuration Simultaneous Sampling Rating Catalog Reference mode External Input voltage range (max) (V) 1.15, 3.75 Input voltage range (min) (V) -1.6, 1 Features PGA Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 4.4 Analog supply voltage (min) (V) -2.5, 0 Analog supply voltage (max) (V) 2.5, 5 Digital supply (min) (V) 2.25 Digital supply (max) (V) 3.6
VQFN (RHB) 32 25 mm² 5 x 5
  • SNR: 114 dB (50 Hz–200 Hz, Gain = 1)
  • Power: 2.2 mW (Per ADC)
  • THD: –115 dB
  • CMRR: 110 dB
  • High-Impedance CMOS PGA:
    • Gains 1, 2, 4, 8, and 16
  • Data Rates: 62.5 SPS to 1000 SPS
  • Flexible Digital Filter:
    • Sinc + FIR + IIR (Selectable)
    • Linear and Minimum Phase Response
    • Programmable High-Pass Filter
  • Sensor-Test Current Sources
  • Offset and Gain Calibration
  • Synchronization Control
  • SPI™-Compatible Interface
  • Analog Power Supply: 5 V or ±2.5 V
  • Digital Power Supply: 2.5 V to 3.3 V
  • SNR: 114 dB (50 Hz–200 Hz, Gain = 1)
  • Power: 2.2 mW (Per ADC)
  • THD: –115 dB
  • CMRR: 110 dB
  • High-Impedance CMOS PGA:
    • Gains 1, 2, 4, 8, and 16
  • Data Rates: 62.5 SPS to 1000 SPS
  • Flexible Digital Filter:
    • Sinc + FIR + IIR (Selectable)
    • Linear and Minimum Phase Response
    • Programmable High-Pass Filter
  • Sensor-Test Current Sources
  • Offset and Gain Calibration
  • Synchronization Control
  • SPI™-Compatible Interface
  • Analog Power Supply: 5 V or ±2.5 V
  • Digital Power Supply: 2.5 V to 3.3 V

The ADS1287D device is a dual, simultaneous-sampling, 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 low-power, seismic data acquisition.

The ADC features a programmable-gain, high-impedance 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). Dual 100-nA current sources are integrated into the ADC inputs for field testing of sensors.

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.

Total device power consumption is 4.4 mW. The ADC is packaged in a compact 5-mm × 5-mm VQFN package and is fully specified over the –40°C to +85°C temperature range.

The ADS1287D device is a dual, simultaneous-sampling, 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 low-power, seismic data acquisition.

The ADC features a programmable-gain, high-impedance 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). Dual 100-nA current sources are integrated into the ADC inputs for field testing of sensors.

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.

Total device power consumption is 4.4 mW. The ADC is packaged in a compact 5-mm × 5-mm VQFN package and is fully specified over the –40°C to +85°C temperature range.
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重要文件 類型 標題 格式選項 日期
* Data sheet ADS1287D Dual, Simultaneous-Sampling, Low-Power, 1000-SPS, Analog-to-Digital Converter With a Programmable Gain Amplifier datasheet PDF | HTML 2017年 9月 29日
Application note QFN and SON PCB Attachment (Rev. C) PDF | HTML 2023年 12月 6日
Application note Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 2023年 3月 29日
E-book Fundamentals of Precision ADC Noise Analysis (Rev. A) 2020年 6月 19日

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ADS1287D IBIS Model

SBAM322.ZIP (89 KB) - IBIS Model
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ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

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 (...)

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ADC-DAC-TO-VREF-SELECT-DESIGN-TOOL — The ADC-TO-VREF-SELECT tool enables the pairing of TI ADCs, DACs, and series voltage references.

The ADC-TO-VREF-SELECT tool enables the pairing of TI analog-to-digital converters (ADCs) and series voltage references. Users can select an ADC device and the desired reference voltage, and the tool will list up to two voltage reference recommendations.
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PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

PSpice® for TI 是有助於評估類比電路功能的設計和模擬環境。這款全功能設計和模擬套件使用 Cadence® 的類比分析引擎。PSpice for TI 包括業界最大的模型庫之一，涵蓋我們的類比和電源產品組合，以及特定類比行為模型，且使用無需支付費用。

PSpice for TI 設計和模擬環境可讓您使用其內建函式庫來模擬複雜的混合訊號設計。在進行佈局和製造之前，建立完整的終端設備設計和解決方案原型，進而縮短上市時間並降低開發成本。 

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TINA-TI — 基於 SPICE 的類比模擬程式

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
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