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ADC de precisión

ADS7946

ACTIVO

ADC SAR de 14 bits, 2 MSPS, dos canales, unipolar, pseudodiferencial y potencia en u

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ADS7946

ACTIVO
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Detalles del producto

Resolution (Bits) 14 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) 5.25 Input voltage range (min) (V) 0 Features Small Size Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 10.5 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.25 SNR (dB) 82 Digital supply (min) (V) 1.65 Digital supply (max) (V) 5.25
Resolution (Bits) 14 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) 5.25 Input voltage range (min) (V) 0 Features Small Size Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 10.5 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.25 SNR (dB) 82 Digital supply (min) (V) 1.65 Digital supply (max) (V) 5.25
WQFN (RTE) 16 9 mm² 3 x 3
  • Sample Rate: 2 MSPS
  • 14-Bit, Pin-Compatible with 8/10/12-bit ADS7947/8/9 Family (ADS7946)
  • Outstanding Performance:
    • SNR: 84 dB (ADS7945)
    • No Missing Codes
    • INL: 1.5 LSB (max) (ADS7945)
  • Low Power:
    • 11.6 mW at 2 MSPS Operation
    • Auto Power-Down at Lower Speeds: 7.2 mW at 500 kSPS1.4 mW at 100 kSPS0.3 mW at 20 kSPS
  • Wide Supply Range:
    • Analog: 2.7 V to 5.25 V
    • Digital: 1.65 V to AVDD
  • Simple Serial Interface (SPI)
  • Fully Specified from –40°C to +125°C
  • Tiny Footprint: 3 mm × 3 mm QFN
  • Sample Rate: 2 MSPS
  • 14-Bit, Pin-Compatible with 8/10/12-bit ADS7947/8/9 Family (ADS7946)
  • Outstanding Performance:
    • SNR: 84 dB (ADS7945)
    • No Missing Codes
    • INL: 1.5 LSB (max) (ADS7945)
  • Low Power:
    • 11.6 mW at 2 MSPS Operation
    • Auto Power-Down at Lower Speeds: 7.2 mW at 500 kSPS1.4 mW at 100 kSPS0.3 mW at 20 kSPS
  • Wide Supply Range:
    • Analog: 2.7 V to 5.25 V
    • Digital: 1.65 V to AVDD
  • Simple Serial Interface (SPI)
  • Fully Specified from –40°C to +125°C
  • Tiny Footprint: 3 mm × 3 mm QFN

The ADS7945/6 are 14-bit, 2 MSPS analog-to-digital converters (ADCs), with differential and single-ended inputs, respectively. The devices operate at a 2 MSPS sample rate with a standard 16-clock data frame. The devices feature both outstanding dc precision and excellent dynamic performance; the ADS7946 is pin-compatible with the 8/10/12-bit ADS7947/8/9 devices. The devices include a two-channel input multiplexer and a low-power successive approximation register (SAR) ADC with an inherent sample-and-hold (S/H) input stage.

The ADS7945/6 support a wide analog supply range that allows the full-scale input range to extend to ±5 V differential or 5 V single-ended. A simple SPI™, 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 QFN package, the ADS7945/6 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 package size are key.

The ADS7945/6 are 14-bit, 2 MSPS analog-to-digital converters (ADCs), with differential and single-ended inputs, respectively. The devices operate at a 2 MSPS sample rate with a standard 16-clock data frame. The devices feature both outstanding dc precision and excellent dynamic performance; the ADS7946 is pin-compatible with the 8/10/12-bit ADS7947/8/9 devices. The devices include a two-channel input multiplexer and a low-power successive approximation register (SAR) ADC with an inherent sample-and-hold (S/H) input stage.

The ADS7945/6 support a wide analog supply range that allows the full-scale input range to extend to ±5 V differential or 5 V single-ended. A simple SPI™, 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 QFN package, the ADS7945/6 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 package size are key.
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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Fecha
* Data sheet 14-Bit, 2-MSPS, Dual-Channel, Differential/Single-Ended, Ultralow-Power ADCs datasheet (Rev. B) 15 sep 2011
E-book Best of Baker's Best: Precision Data Converters -- SAR ADCs 21 may 2015
Application note Determining Minimum Acquisition Times for SAR ADCs, part 2 17 mar 2011
Application note Determining Minimum Acquisition Times for SAR ADCs, part 1 (Rev. A) 10 nov 2010

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

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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
WQFN (RTE) 16 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

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Soporte y capacitación

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