AFE5801

AFE5801 www.ti.com SLOS591D – SEPTEMBER 2008 – REVISED MAY 2010 8-Channel Variable-Gain Amplifier (VGA) With Octal High-Speed ADC Check for Samples: AFE5801 FEATURES 1 Eight Variable-Gain Amplifiers (VGA) – Eight Differential Buffered Inputs With 2Vpp Maximum Swing – 5.5nV/√Hz VCA Input Noise (31dB Gain) – Variable Gain, –5dB to 31dB With 0.125dB or 1dB Steps – Digital Gain Control Third-Order Antialiasing Filter With Programmable Cutoff Frequency (7.5, 10, or 14MHz) Clamping Analog-to-Digital Converter (ADC) – Octal Channel, 12Bit, 65MSPS – Internal and External Reference Support – No External Decoupling Required for References – Serial LVDS Outputs 1.8V and 3.3V Supplies 50mW Total Power per Channel at 30MSPS 58mW Total Power per Channel at 50MSPS 64QFN Package (9mm × 9mm) APPLICATIONS Imaging: Ultrasound, PET RELATED DEVICES AFE5851: 16-Channel VGA + ADC, 32.5MSPS/Channel DESCRIPTION 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...