AFE5851

AFE5851 www.ti.com SLOS574B – SEPTEMBER 2008 – REVISED MAY 2010 16 CHANNEL VARIABLE GAIN AMPLIFIER (VGA) WITH OCTAL HIGH SPEED ADC Check for Samples: AFE5851 FEATURES 1 16 Variable Gain Amplifiers (VGA) – 16 Single-Ended Buffered Inputs With 1VPP Maximum Swing – 5.5nV/√Hz VCA Input Noise (31dB Gain). – Variable Gain –5dB to 31dB With 0.125dB Steps – Digital Gain Control 3rd Order Anti-Aliasing Filter With Programmable Cut-Off Frequency (7.5, 10 and 14MHz). Clamping Analog-to-Digital Converter (ADC) – Octal channel 12-bit, 65 MSPS – 32.5 MSPS Maximum per Input Channel – 2 VGA Outputs Alternately Sampled by Each ADC – Internal and External Reference Support – No External Decoupling Required for References – Serial LVDS Outputs 1.8V and 3.3V Supply 39 mW Total Power per Channel at 32.5 MSPS 64-QFN Package (9mm × 9mm) APPLICATIONS Imaging: Ultrasound, PET DESCRIPTION The AFE5851 is an analog front-end targeting applications where the power and level of integration are critical. The device contains 16 variable gain amplifiers (VGA), followed by an octal high speed (up to 65 MSPS) analog to digital converter (ADC). Each of the 16 single ended inputs is buffered, accepts up to 1VPP maximum input swing and it 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 anti-alias low pass fi...