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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 x 4
  • 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 Fecha
* Data sheet ADS1287 Low-Power, 1000-SPS, Wide-Bandwidth, Analog-to-Digital Converter With Programmable Gain Amplifier datasheet (Rev. B) PDF | HTML 27 ago 2019
Application note Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs (Rev. A) PDF | HTML 18 mar 2024
Application note QFN and SON PCB Attachment (Rev. C) PDF | HTML 06 dic 2023
Application note Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 29 mar 2023
E-book Fundamentals of Precision ADC Noise Analysis (Rev. A) 19 jun 2020

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Modelo de simulación

ADS1287 IBIS Model

SBAM326.ZIP (62 KB) - IBIS Model
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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
VQFN (RHF) 24 Ultra Librarian
Se aplican los Términos y condiciones estándar de TI para los elementos de evaluación.

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL)/reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

Soporte y capacitación

Foros de TI E2E™ con asistencia técnica de los ingenieros de TI

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