AFE5801 - 具有 ADC 的 8 通道 VGA

AFE5801是TI德州仪器公司的一款医疗电子模拟前端产品，AFE5801是具有 ADC 的 8 通道 VGA，本站介绍了AFE5801的封装应用图解、特点和优点、功能等，并给出了与AFE5801相关的TI元器件型号供参考。

AFE5801 - 具有 ADC 的 8 通道 VGA - 医疗电子模拟前端 - 模拟前端(AFE) - 德州仪器

产品描述

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).

产品特性

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
APPLICATIONS
- AFE5851: 16-Channel VGA + ADC, 32.5MSPS/Channel

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