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AFE5808A
- 8-Channel Complete Analog Front-End
- LNA, VCAT, PGA, LPF, ADC, and CW Mixer
- Programmable Gain Low-Noise Amplifier (LNA)
- 24-, 18-, or 12-dB Gain
- 0.25-, 0.5-, or 1-VPP Linear Input Range
- 0.63-, 0.7-, or 0.9-nV/√Hz Input-Referred Noise
- Programmable Active Termination
- 40-dB, Low-Noise Voltage-Controlled Attenuator
(VCAT) - 24-, or 30-dB Programmable Gain Amplifier (PGA)
- 3rd-Order, Linear-Phase, Low-Pass Filter (LPF)
- 10 MHz, 15 MHz, 20 MHz, or 30 MHz
- 14-bit Analog-to-Digital Converter (ADC)
- 77-dBFS SNR at 65 MSPS
- LVDS Outputs
- Noise and Power Optimizations (Full Chain)
- 158 mW/CH at 0.75 nV/√Hz, 65 MSPS
- 101 mW/CH at 1.1 nV/√Hz, 40 MSPS
- 80 mW/CH in CW Mode
- Excellent Device-to-Device Gain Matching
- ±0.5 dB (Typical) and ±0.9 dB (Maximum)
- Low Harmonic Distortion
- Fast and Consistent Overload Recovery
- Passive Mixer for Continuous Wave Doppler
(CWD)- Low Close-in Phase Noise: –156 dBc/Hz at 1
KHz Off 2.5-MHz Carrier - Phase Resolution of 1/16λ
- Support 16X, 8X, 4X and 1X CW Clocks
- 12-dB Suppression on 3rd and 5th Harmonics
- Flexible Input Clocks
- Low Close-in Phase Noise: –156 dBc/Hz at 1
- Small Package: 15-mm × 9-mm, 135-Pin NFBGA
The AFE5808A is a highly-integrated, analog front-end (AFE) solution specifically designed for ultrasound systems in which high performance and small size are required. The AFE5808A integrates a complete time-gain-control (TGC) imaging path and a continuous wave Doppler (CWD) path. This device also enables users to select one of various power and noise combinations to optimize system performance. Therefore, the AFE5808A is an outstanding ultrasound analog front-end solution not only for high-end systems, but also for portable ones.
The AFE5808A device contains eight voltage controlled amplifiers (VCA), 14- and 12-bit analog-to-digital converters (ADC), and CW mixers. The VCA includes a low-noise amplifier (LNA), voltage-controlled attenuator (VCAT), programmable gain amplifier (PGA), and low-pass filter (LPF). The LNA gain is programmable to support 250 mVPP to 1 VPP input signals. Programmable active termination is also supported by the LNA. The ultralow noise VCAT provides an attenuation control range of 40 dB, and improves overall low gain SNR that benefits harmonic imaging and near field imaging. The PGA provides gain options of 24 dB and 30 dB. In front of the ADC, a LPF can be configured as 10 MHz, 15 MHz, 20 MHz, or 30 MHz to support ultrasound applications with different frequencies. The high-performance 14-bit, 65-MSPS ADC in the AFE5808A device achieves 77-dBFS SNR, and ensures excellent SNR at low-chain gain. The ADC LVDS outputs enable flexible system integration desired for miniaturized systems.
The AFE5808A device also incorporates a low-power passive mixer and a low-noise summing amplifier to accomplish on-chip CWD beamforming. Sixteen selectable phase-delays can be applied to each analog input signal. A unique 3rd- and 5th-order harmonic-suppression filter is implemented to enhance CW sensitivity.
The AFE5808A is available in a 15-mm × 9-mm, 135-pin BGA package and it is specified for operation from 0°C to 85°C. This device is also pin-to-pin compatible with the AFE5803, AFE5807, and AFE5808.
NOTE: The AFE5808A is an enhanced version of AFE5808 and is recommended for new designs. Compared to the AFE5808, the AFE5808A expands the cutoff frequency range of the digital high-pass filter; increases the handling capability of extreme overload signals; and lowers the correlated noise significantly when high-impedance source appears.
技術文件
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檢視所有 3 | 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | AFE5808A 0.75 nV/√Hz, 65-MSPS, 158 mW/Channel, Fully-Integrated, 8-Channel, 14- and 12-Bit, Ultrasound Analog Front-End With Passive CW Mixer datasheet (Rev. D) | PDF | HTML | 2015年 7月 6日 |
| EVM User's guide | AFE5808/08A (Rev E) Evaluation Module.. (Rev. B) | 2015年 3月 5日 | ||
| Application note | Understanding Serial LVDS Capture in High-Speed ADCs | 2013年 7月 10日 |
設計與開發
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開發板
AFE5808AEVM — AFE5808A 評估模組
AFE5808AEVM 為評估 AFE5808A 提供了便利的平台。AFE5808A 是 AFE5808 的增強型版本，建議用於新設計。與 AFE5808 相比，其擴展了數位高通濾波器的截斷頻率範圍；可在出現高阻抗來源時降低相關雜訊；提升了處理極端過載訊號的能力。
AFE5808A 是一款具備連續波 (CW) 都卜勒混波器的 8 通道完全整合類比前端 (AFE)，適用於頻譜都卜勒超音波設備。EVM 套件包括使用指南、軟體、USB 纜線，以及已完全組裝的電路板。使用者需要提供來自訊號產生器的輸入訊號以進行測量。使用者必須具有可附加與分析 AFE5808 LVDS 資料流之資料的方法。
使用指南: PDF
模擬工具
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PSpice for TI 設計和模擬環境可讓您使用其內建函式庫來模擬複雜的混合訊號設計。在進行佈局和製造之前，建立完整的終端設備設計和解決方案原型，進而縮短上市時間並降低開發成本。
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| NFBGA (ZCF) | 135 | Ultra Librarian |
訂購與品質
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- 產品標記
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- 材料內容
- 認證摘要
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