AFE5809
- 8-Channel Complete Analog Front-End
- LNA, VCAT, PGA, LPF, ADC, and CW Mixer
- Programmable Gain Low-Noise Amplifier (LNA)
- 24-, 18-, 12-dB Gain
- 0.25-, 0.5-, 1-VPP Linear Input Range
- 0.63-, 0.7-, 0.9-nV/rtHz Input Referred Noise
- Programmable Active Termination
- 40-dB Low-Noise Voltage Controlled Attenuator
(VCAT) - 24-/30-dB Programmable Gain Amplifier (PGA)
- Third-Order Linear Phase Low-Pass Filter (LPF)
- 10,15, 20, 30 MHz
- 14-Bit Analog-to-Digital Converter (ADC)
- 77 dBFS SNR at 65 MSPS
- LVDS Outputs
- Noise, Power Optimizations (Without Digital
Demodulator)- 158 mW/CH at 0.75 nV/rtHz, 65 MSPS
- 101 mW/CH at 1.1 nV/rtHz, 40 MSPS
- 80 mW/CH at CW Mode
- Excellent Device-to-Device Gain Matching
- ±0.5 dB (Typical) and ±1 dB (Maximum)
- Digital I/Q Demodulator after ADC
- Wide Range Demodulation Frequency
- <1 kHz Frequency Resolution
- Decimation Filter Factor M = 1 to 32
- 16xM Tap FIR Decimation Filter
- LVDS Rate Reduction after Demodulation
- On-Chip RAM With 32 Preset Profiles
- Low Harmonic Distortion
- Low-Frequency Sonar Signal Processing
- 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 16×, 8×, 4×, and 1× CW Clocks
- 12-dB Suppression on Third and Fifth
Harmonics - Flexible Input Clocks
- Low Close-in Phase Noise –156 dBc/Hz at 1
- Small Package: 15 mm × 9 mm, 135-BGA
The AFE5809 device is a highly-integrated analog front-end (AFE) solution specifically designed for ultrasound systems in which high performance and small size are required. The AFE5809 device integrates a complete time-gain-control (TGC) imaging path and a CWD path. The device also enables users to select one of various power and noise combinations to optimize system performance. Therefore, the AFE5809 device is a suitable ultrasound AFE solution not only for high-end systems, but also for portable ones.
The AFE5809 device contains eight channels of voltage controlled amplifier (VCA), 14, and 12-bit ADC, and CW mixer. The VCA includes LNA, VCAT, PGA, and 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 ultra-low noise VCAT provides an attenuation control range of 40 dB and improves overall low-gain SNR, which benefits harmonic imaging and near-field imaging. The PGA provides gain options of 24 and 30 dB. Before the ADC, a LPF can be configured as 10, 15, 20, or 30 MHz to support ultrasound applications with different frequencies. In addition, the signal chain of the AFE5809 device can handle signal frequency lower than 100 kHz, which enables the device to be used in both sonar and medical applications. The high-performance 14-bit/65-MSPS ADC in the AFE5809 device achieves 77-dBFS SNR. It ensures excellent SNR at low chain gain. The ADC’s LVDS outputs enable flexible system integration desired for miniaturized systems.
The AFE5809 device integrates a low-power passive mixer and a low-noise summing amplifier to accomplish on-chip CWD beamformer. 16 selectable phase-delays can be applied to each analog input signal. Meanwhile, a unique third- and fifth-order harmonic suppression filter is implemented to enhance CW sensitivity.
The AFE5809 device also includes a digital in-phase and quadrature (I/Q) demodulator and a low-pass decimation filter. The main purpose of the demodulation block is to reduce the LVDS data rate and improve overall system power efficiency. The I/Q demodulator can accept ADC output with up to 65 MSPS sampling rate and 14-bit resolution. For example, after digital demodulation and 4× decimation filtering, the data rate for either in-phase or quadrature output is reduced to 16.25 MSPS and the data resolution is improved to 16 bits, consequently. Hence, the overall LVDS trace reduction can be a factor of 2. This demodulator can be bypassed and powered down completely if it is not needed.
The AFE5809 device is available in a 15-mm × 9-mm, 135-pin BGA package, and it is specified for operation from 0°C to 85°C.
Note: AFE5809 with date code later than 2014, that is date code >41XXXX, has below additional features which can be enabled by Register 61[15,14,13]. Existing analog performance remains the same.
- 61[13] enables an additional voltage clamp at the V2I input of the PGA. This limits the amount of overload signal the PGA sees.
- 61[14] enables a first-order 5-MHz LPF filter to suppress signals >5 MHz or high-order harmonics.
- 61[15] enables a –6-dB PGA clamp setting. The actual PGA output is less than the ADC’s full-scale amplitude, 2 Vpp.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | AFE5809 Fully Integrated, 8-Channel Ultrasound Analog Front End With Passive CW Mixer, and Digital I/Q Demodulator, 0.75 nV/rtHz, 14, 12-Bit, 65 MSPS, 158 mW/CH datasheet (Rev. E) | PDF | HTML | 2014/8/25 | ||
| 設計指南 | SONAR Receiver Path Sub-System Using the AFE5809 Design Guide | 2014/11/23 | ||||
| 應用說明 | Understanding Serial LVDS Capture in High-Speed ADCs | 2013/7/10 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
AFE5809EVM — AFE5809 評估模組
AFE5809 為一專為超音波系統設計，並要求高性能和小體積的高度整合類比前端 (AFE) 解決方案。AFE5809 整合了完整的時間增益控制 (TGC) 影像路徑和連續波都卜勒 (CWD) 路徑。使用者也可以選擇不同的功率/雜訊組合來最佳化系統性能。因此，AFE5809 不僅是適合高階系統的超音波類比前端解決方案，也是適合可攜式系統的超音波類比前端解決方案。
DATACONVERTERPRO-SW — 高速資料轉換器 Pro GUI 安裝程式，v5.31
這款高速資料轉換器專業 GUI 是一款 PC（與 Windows® XP/7/10 相容）程式，旨在協助評估大多數 TI 高速資料轉換器 [類比轉數位轉換器 (ADC) 和數位轉類比轉換器 (DAC)] 和類比前端 (AFE) 平台。DATACONVERTERPRO-SW 旨在支援整個 TSW14xxx 系列資料擷取和模式產生卡，為時域和頻域中的資料轉換器分析提供強大且快速的解決方案，並支援單音、多音和調變訊號。此 GUI 也與 TI 模式產生 GUI 相容，可快速合成單音、多音和調變訊號。
使用者可以向 DATACONVERTERPRO-SW 提供自訂模式，以載入到 TI DAC。支援從 (...)
SLOC276 — AFE5809EVM GUI
TIDA-00419 — 採用八通道類比前端的聲納接收器路徑子系統參考設計
此參考設計展示了使用整合式類比前端 (AFE) AFE5809 的聲納接收路徑子系統。AFE5809 具有八個類比訊號調整 (LNA + VCAT + PGA) 通道和數位處理（ADC + 數位解調器）通道，可實現高度系統接收路徑整合，並為高階聲納系統實現高性能回波位置成像。此參考設計使用根據 AFE5809EVM 修改的電路圖，展示此聲納子系統。包含的測試數據是透過結合 AFE5809EVM 與 TSW1400EVM FPGA 擷取卡及其各自的軟體 GUI 來擷取，以模擬能夠進行高性能測量的接收鏈解決方案。
| 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
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。