AFE5832
- 32-Channel, AFE for Ultrasound Applications:
- Input Attenuator, LNA, LPF, ADC,
and CW Mixer - Digital Time Gain Compensation (DTGC)
- Total Gain Range: 12 dB to 51 dB
- Linear Input Range: 800 mVPP
- Input Attenuator, LNA, LPF, ADC,
- Input Attenuator With DTGC:
- 8-dB to 0-dB Attenuation With 0.125-dB Step
- Supports Matched Impedance for:
- 50-Ω to 800-Ω Source Impedance
- Low-Noise Amplifier (LNA) With DTGC:
- 20-dB to 51-dB Gain With 0.125-dB Step
- Low Input Current Noise: 1.2 pA/√Hz
- 3rd-Order, Linear-Phase, Low-Pass Filter (LPF):
- 5 MHz, 7.5 MHz, 10 MHz, and 12.5 MHz
- 16 ADCs Converting at 12-Bit, 80 MSPS or 10-bit, 100 MSPS:
- Each ADC Converts Two Sets of Inputs at Half Rate
- 12-Bit ADC: 72-dBFS SNR
- 10-Bit ADC: 61-dBFS SNR
- Optimized for Noise and Power:
- 35 mW/Ch at 2.1 nV/√Hz, 40 MSPS
- 42 mW/Ch at 1.4 nV/√Hz, 40 MSPS
- 52 mW/Ch at 1.3 nV/√Hz, 40 MSPS
- 60 mW/Ch in CW Mode
- Excellent Device-to-Device Gain Matching:
- ±0.5 dB (Typical)
- Low Harmonic Distortion: –55 dBc
- Fast and Consistent Overload Recovery
- Continuous Wave (CW) Path With:
- Low Close-In Phase Noise of –151 dBc/Hz
at 1-kHz Frequency Offset Off 2.5-MHz Carrier - Phase Resolution: λ / 16
- Supports 16X CW Clock
- 12-dB Suppression on Third and Fifth Harmonics
- Low Close-In Phase Noise of –151 dBc/Hz
- LVDS Interface With a Speed Up to 1 Gbps
- Small Package: 15-mm × 15-mm NFBGA-289
The AFE5832 device is a highly-integrated, analog front-end solution specifically designed for ultrasound systems where high performance, low power, and small size are required.
The AFE5832 is an integrated analog front-end (AFE) optimized for medical ultrasound application. The device is realized through a multichip module (MCM) with three dies: two voltage-controlled amplifier (VCA) dies and one analog-to-digital converter (ADC) die. Each VCA die has 16 channels and the ADC die converts all of the 32 channels.
Each channel in the VCA die is configured in either of two modes: time gain compensation (TGC) mode or continuous wave (CW) mode. In TGC mode, each channel includes an input attenuator (ATTEN), a low-noise amplifier (LNA) with variable-gain, and a third-order, low-pass filter (LPF). The attenuator supports an attenuation range of 8 dB to 0 dB, and the LNA supports gain ranges from 20 dB to 51 dB. The LPF cutoff frequency can be configured at 5 MHz, 7.5 MHz, 10 MHz, or 12.5 MHz to support ultrasound applications with different frequencies. In CW mode, each channel includes an LNA with a fixed gain of 18 dB, and a low-power passive mixer with 16 selectable phase delays. Different phase delays can be applied to each analog input signal to perform an on-chip beamforming operation. A harmonic filter in the CW mixer suppresses the third and fifth harmonic to enhance the sensitivity of the CW Doppler measurement.
The ADC die has 16 physical ADCs. Each ADC converts two sets of outputs – one from each VCA die. The ADC is configured to operate with a resolution of 12 bits or 10 bits. The ADC resolution can be traded off with conversion rate, and operates at maximum speeds of 80 MSPS and 100 MSPS at 12-bit and 10-bit resolution, respectively. The ADC is designed to scale its power with sampling rate. The output interface of the ADC comes out through a low-voltage differential signaling (LVDS) which can easily interface with low-cost field-programmable gate arrays (FPGAs).
The AFE5832 also allows various power and noise combinations to be selected for optimizing system performance. Therefore, this device is a suitable ultrasound AFE solution for systems with strict battery-life requirements.
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技术文档
| 类型 | 标题 | 下载最新的英语版本 | 日期 | |||
|---|---|---|---|---|---|---|
| * | 数据表 | AFE5832 32-Channel Ultrasound AFE With 35-mW/Channel Power, 2.1 nV/√Hz Noise, 12-Bit, 40-MSPS or 10-Bit, 50-MSPS Output, Passive CW Mixer and LVDS Interface 数据表 (Rev. A) | PDF | HTML | 2018年 4月 19日 | ||
| 应用手册 | 设计适用于超声波智能探头的双极高压 SEPIC 电源 (Rev. A) | PDF | HTML | 英语版 (Rev.A) | PDF | HTML | 2023年 5月 31日 | |
| 应用简报 | AFE5832LP and AFE5832 Ultrasound AFE for Ultra-Portable Applications | 2019年 1月 4日 | ||||
| EVM 用户指南 | AFE5832 32-Channel Analog Front-End Evaluation Module User's Guide | 2017年 8月 25日 | ||||
| 应用手册 | Introduction to Ultrasound | 2017年 7月 10日 |
设计和开发
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AFE5832EVM — AFE5832 具有 LVDS 接口和 CW 无源混频器的 32 通道超声波 AFE 评估模块
AFE5832 评估模块 (EVM) 是一款用于评估 AFE5832 器件的平台。AFE5832 是一款高度集成的模拟前端 (AFE) 解决方案，专为需要实现高性能的小尺寸超声波系统而设计。该器件集成了完整的时间增益控制 (TGC) 成像路径和连续波多普勒 (CWD) 路径。该 32 通道器件支持各种功率和噪声组合，可实现最佳系统性能。因此，AFE5832 是一套适用于高端便携式系统的超声波 AFE 解决方案。
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| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| NFBGA (ZBV) | 289 | Ultra Librarian |
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