产品信息
特性
- Eight Variable-Gain Amplifiers (VGA)
- Eight Differential Buffered Inputs With 2Vpp Maximum Swing
- 5nV/√Hz VCA Input Noise (30dB Gain)
- Variable Gain, -6dB to 30dB With 0.125dB or 1dB Steps
- Digital Gain Control
- Second-Order Antialiasing Filter With Programmable Cutoff Frequency (10, 14, or 20MHz)
- 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
- 44mW Total Power per Channel at 30MSPS
- 58mW Total Power per Channel at 50MSPS
- 64QFN Package (9mm × 9mm)
- APPLICATIONS
- RELATED DEVICES
- AFE5851: 16Channel VGA + ADC, 32.5MSPS/Channel
说明
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 -6dB to 30dB. 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 6dB attenuation at 10, 14, or 20MHz) 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 64pin QFN package (9mm × 9mm) and is specified over the full industrial temperature range (-40°C to 85°C).
