AFE5805 - 用于超声波的 8 通道模拟前端

AFE5805是TI德州仪器公司的一款医疗电子模拟前端产品，AFE5805是用于超声波的 8 通道模拟前端，本站介绍了AFE5805的封装应用图解、特点和优点、功能等，并给出了与AFE5805相关的TI元器件型号供参考。

AFE5805 - 用于超声波的 8 通道模拟前端 - 医疗电子模拟前端 - 模拟前端(AFE) - 德州仪器

产品描述

The AFE5805 is a complete analog front-end device specifically designed for ultrasound systems that require low power and small size.

The AFE5805 consists of eight channels, including a low-noise amplifier (LNA), voltage-controlled attenuator (VCA), programmable gain amplifier (PGA), low-pass filter (LPF), and a 12-bit analog-to-digital converter (ADC) with low voltage differential signaling (LVDS) data outputs.

The LNA gain is set for 20dB gain, and has excellent noise and signal handling capabilities, including fast overload recovery. VCA gain can vary over a 46dB range with a 0V to 1.2V control voltage common to all channels of the AFE5805.

The PGA can be programmed for gains of 20dB, 25dB, 27dB, and 30dB. The internal low-pass filter can also be programmed to 10MHz or 15MHz.

The LVDS outputs of the ADC reduce the number of interface lines to an ASIC or FPGA, thereby enabling the high system integration densities desired for portable systems. The ADC can either be operated with internal or external references. The ADC also features a signal-to-noise ratio (SNR) enhancement mode that can be useful at high gains.

The AFE5805 is available in a 15mm × 9mm, 135-ball BGA package that is Pb-free (RoHS-compliant) and green. It is specified for operation from 0°C to +70°C.

产品特性

8-Channel Complete Analog Front-End:
- LNA, VCA, PGA, LPF, and ADC
Ultra-Low, Full-Channel Noise:
- 0.85nV/√Hz (TGC)
- 1.1nV/√Hz (CW)
Low Power:
- 122mW/Channel (40MSPS)
- 74mW/Channel (CW Mode)
Low-Noise Pre-Amp (LNA):
- 0.75nV/√Hz
- 20dB Fixed Gain
- 250mVPP Linear Input Range
Variable-Gain Amplifier:
- Gain Control Range: 46dB
PGA Gain Settings: 20dB, 25dB, 27dB, 30dB
Low-Pass Filter:
- Selectable BW: 10MHz, 15MHz
- 2nd-Order
Gain Error: ±0.5dB
Channel Matching: ±0.25dB
Distortion, HD2: –65dBFS at 5MHz
Clamping Control
Fast Overload Recovery: Two Clock Cycles
12-Bit Analog-to-Digital Converter:
- 10MSPS to 50MSPS
- 69.5dB SNR at 10MHz
- Serial LVDS Interface
Integrated CW Switch Matrix
15mm × 9mm, 135-BGA Package:
- Pb-Free (RoHS-Compliant) and Green
APPLICATIONS
- Medical Imaging, Ultrasound
  - Portable Systems

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