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Convertidores analógico-digitales (ADC)
ADC de precisión

ADS8638

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SAR bipolar de 12 bits y 8 canales con rangos de entrada seleccionables por software

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Hoja de datos

ADS8638

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Detalles del producto

Resolution (Bits) 12 Sample rate (max) (ksps) 1000 Number of input channels 8 Interface type SPI Architecture SAR Input type Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 10 Input voltage range (min) (V) -10 Features Comparator Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 14.45 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.25 SNR (dB) 71.8 Digital supply (min) (V) 1.65 Digital supply (max) (V) 5.25
Resolution (Bits) 12 Sample rate (max) (ksps) 1000 Number of input channels 8 Interface type SPI Architecture SAR Input type Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 10 Input voltage range (min) (V) -10 Features Comparator Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 14.45 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.25 SNR (dB) 71.8 Digital supply (min) (V) 1.65 Digital supply (max) (V) 5.25
VQFN (RGE) 24 16 mm² (4 mm × 4 mm)
  • Selectable Input Range:
    ±10V, ±5V, ±2.5V, 0V to 10V, or
    0V to 5V
    Up to ±12V with External Reference
  • No Latent Conversions Up to 1MSPS
  • Outstanding Performance:
    12 Bits No Missing Codes
    INL: ±0.9LSB
    SNR: 71.8dB
  • Highly Integrated:
    4- or 8-Channel Input Mux
    Temperature Sensor
    Internal Voltage Reference
    Alarm Thresholds for Each Channel
  • Low Power:
    14.45mW at 1MSPS
    5.85mW at 0.1MSPS
    Flexible Power-Down Mode
  • SPI™-Compatible Serial Interface
  • Extended Temperature Range:
    –40°C to +125°C
  • Small Footprint: 4mm × 4mm QFN Package
  • Selectable Input Range:
    ±10V, ±5V, ±2.5V, 0V to 10V, or
    0V to 5V
    Up to ±12V with External Reference
  • No Latent Conversions Up to 1MSPS
  • Outstanding Performance:
    12 Bits No Missing Codes
    INL: ±0.9LSB
    SNR: 71.8dB
  • Highly Integrated:
    4- or 8-Channel Input Mux
    Temperature Sensor
    Internal Voltage Reference
    Alarm Thresholds for Each Channel
  • Low Power:
    14.45mW at 1MSPS
    5.85mW at 0.1MSPS
    Flexible Power-Down Mode
  • SPI™-Compatible Serial Interface
  • Extended Temperature Range:
    –40°C to +125°C
  • Small Footprint: 4mm × 4mm QFN Package

The ADS8634 and ADS8638 (ADS8634/8) are 12-bit analog-to-digital converters (ADCs) capable of measuring inputs up to ±10V at 1MSPS. Using a successive approximation register (SAR) core, these ADCs provide a sample-and-hold front-end with no latency in conversions. The ADS8634 includes an input multiplexer (mux) for measuring up to four inputs. The ADS8638 can measure up to eight inputs.

In addition to the input multiplexer, the ADS8634/8 feature an internal temperature sensor, voltage reference, and a digital comparator for setting alarm thresholds on each input; therefore, a minimal amount of external components are required. A simple SPI-compatible interface provides for communication and control. The digital supply operates from 5V all the way down to 1.8V for direct connection to a wide range of processors and controllers.

Ideal for demanding industrial measurement applications, the ADS8634/8 are fully specified over the extended industrial temperature range of –40°C to +125°C and are available in a small form-factor QFN-24 package.

The ADS8634 and ADS8638 (ADS8634/8) are 12-bit analog-to-digital converters (ADCs) capable of measuring inputs up to ±10V at 1MSPS. Using a successive approximation register (SAR) core, these ADCs provide a sample-and-hold front-end with no latency in conversions. The ADS8634 includes an input multiplexer (mux) for measuring up to four inputs. The ADS8638 can measure up to eight inputs.

In addition to the input multiplexer, the ADS8634/8 feature an internal temperature sensor, voltage reference, and a digital comparator for setting alarm thresholds on each input; therefore, a minimal amount of external components are required. A simple SPI-compatible interface provides for communication and control. The digital supply operates from 5V all the way down to 1.8V for direct connection to a wide range of processors and controllers.

Ideal for demanding industrial measurement applications, the ADS8634/8 are fully specified over the extended industrial temperature range of –40°C to +125°C and are available in a small form-factor QFN-24 package.
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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 12-Bit, 1MSPS, 4-/8-Chan, Bipolar-Input, SAR ADC w/ Software-Selectable Ranges datasheet (Rev. A) 3/08/2011
Application brief Precision ADCs in Servo Drives (Rev. A) PDF | HTML 29/10/2025
Libro electrónico Best of Baker's Best: Precision Data Converters -- SAR ADCs 21/05/2015
Nota sobre la aplicación Determining Minimum Acquisition Times for SAR ADCs, part 2 17/03/2011

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