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Convertidores analógico-digitales (ADC)
ADC de precisión

ADS1287

ACTIVO

ADC delta-sigma de baja potencia, 1 kSPS y 1 canal con PGA para exploración sísmica y energética

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ADS1287

ACTIVO
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Detalles del producto

Resolution (Bits) 24 Sample rate (max) (ksps) 1 Number of input channels 1 Interface type SPI Architecture Delta-Sigma Input type Differential 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) 4.5 Analog supply voltage (min) (V) -2.5, 0 Analog supply voltage (max) (V) 2.5, 5 SNR (dB) 119 Digital supply (min) (V) 2.25 Digital supply (max) (V) 3.6
Resolution (Bits) 24 Sample rate (max) (ksps) 1 Number of input channels 1 Interface type SPI Architecture Delta-Sigma Input type Differential 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) 4.5 Analog supply voltage (min) (V) -2.5, 0 Analog supply voltage (max) (V) 2.5, 5 SNR (dB) 119 Digital supply (min) (V) 2.25 Digital supply (max) (V) 3.6
VQFN (RHF) 24 20 mm² (5 mm × 4 mm)
  • Selectable Operating Modes
  • High-Resolution Mode:
    • SNR: 113 dB (1000 SPS, Gain = 1)
    • Power: 4.5 mW
  • Low-Power Mode:
    • SNR: 110 dB (1000 SPS, Gain = 1)
    • Power: 2.4 mW
  • THD: –115 dB
  • CMRR: 115 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
  • 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
  • Selectable Operating Modes
  • High-Resolution Mode:
    • SNR: 113 dB (1000 SPS, Gain = 1)
    • Power: 4.5 mW
  • Low-Power Mode:
    • SNR: 110 dB (1000 SPS, Gain = 1)
    • Power: 2.4 mW
  • THD: –115 dB
  • CMRR: 115 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
  • 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 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.

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.
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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos ADS1287 Low-Power, 1000-SPS, Wide-Bandwidth, Analog-to-Digital Converter With Programmable Gain Amplifier datasheet (Rev. B) PDF | HTML 27/08/2019
Nota sobre la aplicación Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs (Rev. A) PDF | HTML 18/03/2024
Nota sobre la aplicación QFN and SON PCB Attachment (Rev. C) PDF | HTML 6/12/2023
Nota sobre la aplicación Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 29/03/2023
Libro electrónico Fundamentals of Precision ADC Noise Analysis (Rev. A) 19/06/2020

Diseño y desarrollo

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SBAM326.ZIP (62 KB) - Modelo IBIS
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