产品详情

PGA/VGA VGA Number of channels 8 Vs (max) (V) 3.15 Vs (min) (V) 2.85 BW at Acl (MHz) 100 Acl, min spec gain (V/V) 1.8 Slew rate (typ) (V/µs) 300 Gain (max) (dB) 58 Rating Catalog Operating temperature range (°C) -40 to 85
PGA/VGA VGA Number of channels 8 Vs (max) (V) 3.15 Vs (min) (V) 2.85 BW at Acl (MHz) 100 Acl, min spec gain (V/V) 1.8 Slew rate (typ) (V/µs) 300 Gain (max) (dB) 58 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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类型 标题 下载最新的英语版本 日期
* 数据表 Eight-Channel Variable Gain Amplifier 数据表 (Rev. F) 2009年 11月 18日
应用手册 所选封装材料的热学和电学性质 2008年 10月 16日
应用手册 Interfacing the VCA8617 with High-Speed ADCs 2005年 4月 5日
应用手册 VCA8617: Response to Step-Change in Gain Control 2005年 3月 24日
应用手册 AB-170: Ultrasound Processor Supplementary Material 2001年 1月 25日

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  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
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