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Convertidores analógico-digitales (ADC)
ADC de precisión

ADS7947

ACTIVO

ADC SAR serie uPower de 12 bits, 2 MSPS, doble canal, pseudodiferencial

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ADS7947

ACTIVO
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Detalles del producto

Resolution (Bits) 12 Sample rate (max) (ksps) 2000 Number of input channels 2 Interface type SPI Architecture SAR Input type Pseudo-Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 5.5 Input voltage range (min) (V) 0 Features Small Size Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 7.5 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.5 SNR (dB) 73 Digital supply (min) (V) 1.65 Digital supply (max) (V) 5.5
Resolution (Bits) 12 Sample rate (max) (ksps) 2000 Number of input channels 2 Interface type SPI Architecture SAR Input type Pseudo-Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 5.5 Input voltage range (min) (V) 0 Features Small Size Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 7.5 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.5 SNR (dB) 73 Digital supply (min) (V) 1.65 Digital supply (max) (V) 5.5
WQFN (RTE) 16 9 mm² (3 mm × 3 mm)
  • Sample rate: 2 MSPS
  • Pin-compatible family: 12-, 10-, 8-bit
  • High resolution, high throughput:
    • ADS7947: 12 bit, 2.1 MSPS
    • ADS7948: 10 bit, 2.57 MSPS
    • ADS7949: 8 bit, 3 MSPS
  • Excellent performance:
    • No missing codes
    • INL: 1 LSB (max)
    • SNR: 72 dB (min)
  • Low power:
    • 7.5 mW at 2-MSPS operation
    • Auto power-down at lower speeds:
      • 3.8 mW at 500 kSPS
      • 0.8 mW at 100 kSPS
      • 0.16 mW at 20 kSPS
  • Wide supply range:
    • Analog: 2.7 V to 5.5 V
    • Digital: 1.65 V to AVDD
  • SPI-compatible serial interface
  • Extended temperature range: –40°C to +125°C
  • Tiny footprint: 3-mm × 3-mm WQFN
  • Sample rate: 2 MSPS
  • Pin-compatible family: 12-, 10-, 8-bit
  • High resolution, high throughput:
    • ADS7947: 12 bit, 2.1 MSPS
    • ADS7948: 10 bit, 2.57 MSPS
    • ADS7949: 8 bit, 3 MSPS
  • Excellent performance:
    • No missing codes
    • INL: 1 LSB (max)
    • SNR: 72 dB (min)
  • Low power:
    • 7.5 mW at 2-MSPS operation
    • Auto power-down at lower speeds:
      • 3.8 mW at 500 kSPS
      • 0.8 mW at 100 kSPS
      • 0.16 mW at 20 kSPS
  • Wide supply range:
    • Analog: 2.7 V to 5.5 V
    • Digital: 1.65 V to AVDD
  • SPI-compatible serial interface
  • Extended temperature range: –40°C to +125°C
  • Tiny footprint: 3-mm × 3-mm WQFN

The ADS7947, ADS7948, and ADS7949 are pin-compatible 12-bit, 10-bit, and 8-bit, 2-MSPS, analog-to-digital converters (ADCs), respectively. The devices operate at a 2-MSPS sample rate with a standard 16 clock data frame. In addition, the ADS7947 (12-bit) can be operated at 2.1 MSPS, the ADS7948 (10-bit) at 2.57 MSPS, and the ADS7949 (8-bit) at 3 MSPS with a short data frame optimized for the number of clocks sufficient for conversion with no drop in performance. The devices feature both outstanding dc precision and excellent dynamic performance. This family of pin-compatible devices includes a two-channel input multiplexer and a low-power successive approximation register (SAR) ADC.

The ADS7947, ADS7948, and ADS7949 support a wide analog supply range that supports the full-scale input range up to 5 V. A simple SPI digital interface, with a digital supply that can operate as low as 1.65 V, allows for easy interfacing to a wide variety of digital controllers. Automatic power-down can be enabled when operating at slower speeds to dramatically reduce power consumption.

Offered in a tiny 3-mm × 3-mm WQFN package, the ADS7947, ADS7948, and ADS7949 are fully specified over the extended temperature range of –40°C to +125°C and are suitable for a wide variety of data acquisition applications where high performance, low power, and small size are key.

The ADS7947, ADS7948, and ADS7949 are pin-compatible 12-bit, 10-bit, and 8-bit, 2-MSPS, analog-to-digital converters (ADCs), respectively. The devices operate at a 2-MSPS sample rate with a standard 16 clock data frame. In addition, the ADS7947 (12-bit) can be operated at 2.1 MSPS, the ADS7948 (10-bit) at 2.57 MSPS, and the ADS7949 (8-bit) at 3 MSPS with a short data frame optimized for the number of clocks sufficient for conversion with no drop in performance. The devices feature both outstanding dc precision and excellent dynamic performance. This family of pin-compatible devices includes a two-channel input multiplexer and a low-power successive approximation register (SAR) ADC.

The ADS7947, ADS7948, and ADS7949 support a wide analog supply range that supports the full-scale input range up to 5 V. A simple SPI digital interface, with a digital supply that can operate as low as 1.65 V, allows for easy interfacing to a wide variety of digital controllers. Automatic power-down can be enabled when operating at slower speeds to dramatically reduce power consumption.

Offered in a tiny 3-mm × 3-mm WQFN package, the ADS7947, ADS7948, and ADS7949 are fully specified over the extended temperature range of –40°C to +125°C and are suitable for a wide variety of data acquisition applications where high performance, low power, and small size are key.
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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 ADS794x Ultra-Low Power, 12-, 10-, and 8-Bit, Dual-Channel, SAR ADCs datasheet (Rev. A) PDF | HTML 11/09/2019
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
Nota sobre la aplicación Determining Minimum Acquisition Times for SAR ADCs, part 1 (Rev. A) 10/11/2010

Diseño y desarrollo

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Modelo de simulación

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SBAM054 (48 KB) - Modelo IBIS
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