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AFE5801,pdf(8-Channel Variable
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2010-06-12
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The AFE5801 is an analog front end, targeting
applications where the power and level of integration
are critical. The device contains eight variable-gain
amplifiers (VGA), each followed by a high-speed (up
to 65MSPS) ADC, for a total of eight ADCs per
device.
Each of the eight differential inputs is buffered,
accepts up to 2Vpp maximum input swing, and is
followed by a VGA with a gain range from –5dB to
31dB. The VGA gain is digitally controlled, and the
gain curves versus time can be stored in memory
integrated within the device using the serial interface.
A selectable clamping and antialias low-pass filter
(with 3dB attenuation at 7.5, 10, or 14MHz) is also
integrated between VGA and ADC, for every channel.
The VGA/antialias filter outputs are differential
(limited to 2Vpp) and drive the onboard 12bit,
65MSPS ADC. The ADC also scales down its power
consumption should a lower sampling rate be
selected. The ADC outputs are serialized in LVDS
streams, which further minimizes power and board
area.
The AFE5801 is available in a 64-pin QFN package
(9mm × 9mm) and is specified over the full industrial
temperature range (–40°C to 85°C).
applications where the power and level of integration
are critical. The device contains eight variable-gain
amplifiers (VGA), each followed by a high-speed (up
to 65MSPS) ADC, for a total of eight ADCs per
device.
Each of the eight differential inputs is buffered,
accepts up to 2Vpp maximum input swing, and is
followed by a VGA with a gain range from –5dB to
31dB. The VGA gain is digitally controlled, and the
gain curves versus time can be stored in memory
integrated within the device using the serial interface.
A selectable clamping and antialias low-pass filter
(with 3dB attenuation at 7.5, 10, or 14MHz) is also
integrated between VGA and ADC, for every channel.
The VGA/antialias filter outputs are differential
(limited to 2Vpp) and drive the onboard 12bit,
65MSPS ADC. The ADC also scales down its power
consumption should a lower sampling rate be
selected. The ADC outputs are serialized in LVDS
streams, which further minimizes power and board
area.
The AFE5801 is available in a 64-pin QFN package
(9mm × 9mm) and is specified over the full industrial
temperature range (–40°C to 85°C).
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