Overview
The AFE5808A, produced by Texas Instruments, is a highly-integrated, 8-channel ultrasound analog front-end (AFE) solution. This device is specifically designed for ultrasound systems that require high performance and compact size. It integrates a complete time-gain-control (TGC) imaging path and a continuous wave Doppler (CWD) path, making it suitable for both high-end and portable ultrasound systems. The AFE5808A allows users to select various power and noise combinations to optimize system performance, enhancing its versatility and efficiency.
Key Specifications
| Parameter | Specification |
|---|---|
| Channels | 8-channel complete analog front-end |
| Low-Noise Amplifier (LNA) Gain | 24-, 18-, or 12-dB |
| LNA Input Range | 0.25-, 0.5-, or 1-V PP |
| LNA Input-Referred Noise | 0.63-, 0.7-, or 0.9-nV/√Hz |
| Voltage-Controlled Attenuator (VCAT) | 40-dB, low-noise |
| Programmable Gain Amplifier (PGA) | 24- or 30-dB |
| Low-Pass Filter (LPF) | 3rd-order, linear-phase; 10 MHz, 15 MHz, 20 MHz, or 30 MHz |
| Analog-to-Digital Converter (ADC) | 14-bit, 65 MSPS; 77-dBFS SNR |
| Output Interface | LVDS outputs |
| Power Consumption | 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 |
| Package | 15-mm × 9-mm, 135-pin NFBGA |
| Operating Temperature | 0°C to 85°C |
Key Features
- Programmable gain low-noise amplifier (LNA) with 24-, 18-, or 12-dB gain options
- Programmable active termination and 40-dB low-noise voltage-controlled attenuator (VCAT)
- 24- or 30-dB programmable gain amplifier (PGA)
- 3rd-order, linear-phase low-pass filter (LPF) with configurable frequencies (10 MHz, 15 MHz, 20 MHz, or 30 MHz)
- 14-bit, 65-MSPS analog-to-digital converter (ADC) with 77-dBFS SNR
- LVDS outputs for flexible system integration
- Noise and power optimizations across the full signal chain
- Excellent device-to-device gain matching (±0.5 dB typical, ±0.9 dB maximum)
- Low harmonic distortion and fast, consistent overload recovery
- Passive mixer for continuous wave Doppler (CWD) with low close-in phase noise and harmonic suppression
- Sixteen selectable phase-delays for each analog input signal
Applications
The AFE5808A is designed for use in various ultrasound systems, including both high-end and portable devices. Its high performance, compact size, and flexible power and noise optimization make it suitable for a wide range of applications such as:
- High-end ultrasound imaging systems
- Portable ultrasound devices
- Continuous wave Doppler (CWD) systems
- Time-gain-control (TGC) imaging systems
Q & A
- What is the AFE5808A?
The AFE5808A is a highly-integrated, 8-channel ultrasound analog front-end (AFE) solution produced by Texas Instruments.
- What are the key components of the AFE5808A?
The AFE5808A includes a low-noise amplifier (LNA), voltage-controlled attenuator (VCAT), programmable gain amplifier (PGA), low-pass filter (LPF), analog-to-digital converter (ADC), and a continuous wave Doppler (CWD) mixer.
- What are the gain options for the LNA and PGA?
The LNA has gain options of 24-, 18-, or 12-dB, and the PGA has gain options of 24- or 30-dB.
- What is the resolution and sampling rate of the ADC?
The ADC is a 14-bit converter with a sampling rate of 65 MSPS, achieving a 77-dBFS SNR.
- What is the power consumption of the AFE5808A?
The power consumption is 158 mW/CH at 0.75 nV/√Hz, 65 MSPS; 101 mW/CH at 1.1 nV/√Hz, 40 MSPS; and 80 mW/CH in CW mode.
- What is the package type and size of the AFE5808A?
The AFE5808A is available in a 15-mm × 9-mm, 135-pin NFBGA package.
- What are the operating temperature ranges for the AFE5808A?
The operating temperature range is from 0°C to 85°C.
- Is the AFE5808A pin-to-pin compatible with other models?
Yes, it is pin-to-pin compatible with the AFE5803, AFE5807, and AFE5808.
- What are the key features of the CWD path in the AFE5808A?
The CWD path includes a passive mixer, low close-in phase noise, and a unique 3rd- and 5th-order harmonic-suppression filter.
- How does the AFE5808A optimize system performance?
The AFE5808A allows users to select various power and noise combinations to optimize system performance.
