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可編程與可變增益放大器 (PGA 與 VGA)

VCA8617

現行

8 通道可變增益放大器

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產品規格表

VCA8617

現行
產品規格表 立即訂購

產品詳細資料

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 x 12
  • 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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技術文件

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重要文件 類型 標題 格式選項 日期
* Data sheet Eight-Channel Variable Gain Amplifier datasheet (Rev. F) 2009年 11月 18日
Application note Interfacing the VCA8617 with High-Speed ADCs 2005年 4月 5日
Application note VCA8617: Response to Step-Change in Gain Control 2005年 3月 24日
Application note AB-170: Ultrasound Processor Supplementary Material 2001年 1月 25日

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