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AFE5801IRGCR-AFE5801IRGCT
8-channel VGA with ADC
AFE5801
www.ti.com SLOS591D –SEPTEMBER 2008–REVISED MAY 2010
8-Channel Variable-Gain Amplifier (VGA) With Octal High-Speed ADC
Checkfor Samples: AFE5801
1FEATURES RELATED DEVICES AFE5851: 16-Channel VGA+ ADC,• Eight Variable-Gain Amplifiers (VGA)
32.5MSPS/Channel– Eight Differential Buffered Inputs With 2Vpp
Maximum Swing DESCRIPTION– 5.5nV/√Hz VCA Input Noise (31dB Gain)The AFE5801 is an analog front end, targeting
– Variable Gain, –5dBto 31dB With 0.125dB applications where the power and levelof integration
or 1dB Steps are critical. The device contains eight variable-gain
– Digital Gain Control amplifiers (VGA), each followed bya high-speed (up 65MSPS) ADC, fora totalof eight ADCs per
• Third-Order Antialiasing Filter Withdevice.
Programmable Cutoff Frequency (7.5, 10,or
14MHz) Each of the eight differential inputs is buffered,
accepts upto 2Vpp maximum input swing, andis
• Clampingfollowed bya VGA witha gain range from –5dBto
• Analog-to-Digital Converter (ADC) 31dB. The VGA gainis digitally controlled, and the
– Octal Channel, 12Bit, 65MSPS gain curves versus time can be storedin memory
Internal and External Reference Support integrated within the device using the serial interface.
No External Decoupling Required for A selectable clamping and antialias low-pass filter
References (with 3dB attenuationat 7.5, 10,or 14MHz)is also
integrated between VGA and ADC, for every channel.
– Serial LVDS Outputs 1.8V and 3.3V Supplies The VGA/antialias filter outputs are differential
(limited to 2Vpp) and drive the onboard 12bit,
• 50mW Total Power per Channelat 30MSPS 65MSPS ADC. The ADC also scales downits power
• 58mW Total Power per Channelat 50MSPS consumption should a lower sampling rate be
• 64QFN Package (9mm× 9mm) selected. The ADC outputs are serializedin LVDS
streams, which further minimizes power and board
APPLICATIONS area.
Imaging: Ultrasound, PET The AFE5801is availableina 64-pin QFN package
(9mm× 9mm) andis specified over the full industrial
temperature range (–40°Cto 85°C).
