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Amplificadores de ganancia programable y variable (PGA y VGA)

VCA8617

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Amplificador de ganancia variable de 8 canales

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VCA8617

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Detalles del producto

PGA/VGA VGA Number of channels 8 Vs (min) (V) 2.85 Vs (max) (V) 3.15 BW at Acl (MHz) 100 Acl, min spec gain (V/V) 1.8 Gain (max) (dB) 58 Slew rate (typ) (V/µs) 300 Rating Catalog Operating temperature range (°C) -40 to 85
PGA/VGA VGA Number of channels 8 Vs (min) (V) 2.85 Vs (max) (V) 3.15 BW at Acl (MHz) 100 Acl, min spec gain (V/V) 1.8 Gain (max) (dB) 58 Slew rate (typ) (V/µs) 300 Rating Catalog Operating temperature range (°C) -40 to 85
TQFP (PAG) 64 144 mm² (12 mm × 12 mm)
  • 3V OPERATION
  • LOW INPUT NOISE:
    • 1.05nV/√Hz at fIN = 5MHz
  • EXTREMELY LOW POWER OPERATION:
    • 103mW/CHANNEL
  • INTEGRATED LOW-PASS, ANTI-ALIASING BUTTERWORTH FILTER
    • 14.5MHz BANDWIDTH
  • INTEGRATED INPUT CLAMP DIODES
  • DIFFERENTIAL OUTPUT
  • INTEGRATED INPUT LNA
  • READABLE CONTROL REGISTERS
  • INTEGRATED CONTINUOUS WAVE (CW) PROCESSOR
  • 3V OPERATION
  • LOW INPUT NOISE:
    • 1.05nV/√Hz at fIN = 5MHz
  • EXTREMELY LOW POWER OPERATION:
    • 103mW/CHANNEL
  • INTEGRATED LOW-PASS, ANTI-ALIASING BUTTERWORTH FILTER
    • 14.5MHz BANDWIDTH
  • INTEGRATED INPUT CLAMP DIODES
  • DIFFERENTIAL OUTPUT
  • INTEGRATED INPUT LNA
  • READABLE CONTROL REGISTERS
  • INTEGRATED CONTINUOUS WAVE (CW) PROCESSOR

The VCA8617 is an 8-channel variable gain amplifier ideally suited to portable ultrasound applications. Excellent dynamic performance enables use in low-power, high-performance portable applications. Each channel consists of a 20dB gain Low-Noise pre-Amplifier (LNA) and a Variable Gain Amplifier (VGA). The differential outputs of the LNA can be switched through the 8x10 cross-point switch, which is programmable through the serial interface input port.

The output of the LNA is fed directly into the VGA stage. The VGA consists of two parts, a Voltage-Controlled Attenuator (VCA) and a Programmable Gain Amplifier (PGA). The gain and gain range of the PGA can be digitally configured separately. The gain of the PGA can vary between four discrete settings of 25dB, 30dB, 35dB, and 40dB. The VCA has four programmable maximum attenuation settings: 29dB, 33dB, 36.5dB, and 40dB. Also, the VCA can be continuously varied by a control voltage from 0dB to a maximum of 29dB, 33dB, 36.5dB, and 40dB.

The output of the PGA feeds directly into an integrated low-pass filter.

The VCA8617 is an 8-channel variable gain amplifier ideally suited to portable ultrasound applications. Excellent dynamic performance enables use in low-power, high-performance portable applications. Each channel consists of a 20dB gain Low-Noise pre-Amplifier (LNA) and a Variable Gain Amplifier (VGA). The differential outputs of the LNA can be switched through the 8x10 cross-point switch, which is programmable through the serial interface input port.

The output of the LNA is fed directly into the VGA stage. The VGA consists of two parts, a Voltage-Controlled Attenuator (VCA) and a Programmable Gain Amplifier (PGA). The gain and gain range of the PGA can be digitally configured separately. The gain of the PGA can vary between four discrete settings of 25dB, 30dB, 35dB, and 40dB. The VCA has four programmable maximum attenuation settings: 29dB, 33dB, 36.5dB, and 40dB. Also, the VCA can be continuously varied by a control voltage from 0dB to a maximum of 29dB, 33dB, 36.5dB, and 40dB.

The output of the PGA feeds directly into an integrated low-pass filter.
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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 Eight-Channel Variable Gain Amplifier datasheet (Rev. F) 18/11/2009
Nota sobre la aplicación Interfacing the VCA8617 with High-Speed ADCs 5/04/2005
Nota sobre la aplicación VCA8617: Response to Step-Change in Gain Control 24/03/2005
Nota sobre la aplicación AB-170: Ultrasound Processor Supplementary Material 25/01/2001

Diseño y desarrollo

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TQFP (PAG) 64 Ultra Librarian
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