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ADS1281

ACTIVO

ADC delta-sigma de ultra alta resolución, 4 kSPS y 1 canal para exploración sísmica y energética

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ADS1281

ACTIVO
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Detalles del producto

Resolution (Bits) 31 Sample rate (max) (ksps) 4 Number of input channels 1 Interface type SPI Architecture Delta-Sigma Input type Differential Rating Catalog Reference mode External Input voltage range (max) (V) 2.7, 5 Input voltage range (min) (V) -2.7, 0 Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 12 Analog supply voltage (min) (V) -2.5, 0 Analog supply voltage (max) (V) 2.5, 5 SNR (dB) 130 Digital supply (min) (V) 1.65 Digital supply (max) (V) 3.6
Resolution (Bits) 31 Sample rate (max) (ksps) 4 Number of input channels 1 Interface type SPI Architecture Delta-Sigma Input type Differential Rating Catalog Reference mode External Input voltage range (max) (V) 2.7, 5 Input voltage range (min) (V) -2.7, 0 Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 12 Analog supply voltage (min) (V) -2.5, 0 Analog supply voltage (max) (V) 2.5, 5 SNR (dB) 130 Digital supply (min) (V) 1.65 Digital supply (max) (V) 3.6
TSSOP (PW) 24 49.92 mm² (7.8 mm × 6.4 mm)
  • 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: 10µW
  • Calibration Engine for Offset and
    Gain Correction
  • SYNC Input
  • Analog Supply:
    • Unipolar (+5V) or Bipolar (±2.5V)
  • Digital Supply: 1.8V to 3.3V
  • APPLICATIONS
    • Energy Exploration
    • Seismic Monitoring
    • High-Accuracy Instrumentation

All other trademarks are the property of their respective owners
  • 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: 10µW
  • Calibration Engine for Offset and
    Gain Correction
  • SYNC Input
  • Analog Supply:
    • Unipolar (+5V) or Bipolar (±2.5V)
  • Digital Supply: 1.8V to 3.3V
  • APPLICATIONS
    • Energy Exploration
    • Seismic Monitoring
    • High-Accuracy Instrumentation

All other trademarks are the property of their respective owners

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). The FIR low-pass stage provides both linear and minimum phase response. The HPF features an adjustable corner frequency. On-chip gain and offset scaling registers support system calibration.

The synchronization input (SYNC) can be used to synchronize the conversions of multiple ADS1281s. The SYNC input also accepts a clock input for continuous alignment of conversions from an external source.

Together, the modulator and filter dissipate only 12mW. The ADS1281 is available in a compact TSSOP-24 package and is fully specified from –40°C to +85°C, with a maximum operating range to +125°C.

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). The FIR low-pass stage provides both linear and minimum phase response. The HPF features an adjustable corner frequency. On-chip gain and offset scaling registers support system calibration.

The synchronization input (SYNC) can be used to synchronize the conversions of multiple ADS1281s. The SYNC input also accepts a clock input for continuous alignment of conversions from an external source.

Together, the modulator and filter dissipate only 12mW. The ADS1281 is available in a compact TSSOP-24 package and is fully specified from –40°C to +85°C, with a maximum operating range to +125°C.
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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 High-Resolution A/D Converter datasheet (Rev. D) 1/06/2010
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 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

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

ADS1281 IBIS Model

SBAM109.ZIP (77 KB) - Modelo IBIS
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Soporte y capacitación

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