Overview
The AFE5805EVM is an evaluation module designed by Texas Instruments to characterize and evaluate the performance of the AFE5805, an analog front-end (AFE) device specifically tailored for ultrasound systems. The AFE5805EVM provides a comprehensive platform to test the functionalities and performance of the AFE5805, which includes an 8-channel voltage-controlled amplifier (VCA) and an 8-channel, 50-MSPS analog-to-digital converter (ADC).
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltages (AVDD1, AVDD2, DVDD) | 3.15 | 3.3 | 3.47 | V |
| Supply Voltages (AVDD_5V) | 4.75 | 5 | 5.25 | V |
| Supply Voltages (LVDD) | 1.7 | 1.8 | 1.9 | V |
| ADC Sampling Rate | 10 | - | 50 | MSPS |
| VCA Gain Range | - | - | 46 dB | - |
| PGA Gain Settings | - | - | 20 dB, 25 dB, 27 dB, 30 dB | - |
| Low-Pass Filter Bandwidth | - | - | 10 MHz, 15 MHz | - |
| Signal-to-Noise Ratio (SNR) | - | - | 59.8 dBFS (at 2 MHz, PGA = 30 dB) | - |
| Second-Harmonic Distortion (HD2) | -65 | - | -54 | dBFS (at 5 MHz, PGA = 30 dB) |
| Power Dissipation (Total) | 980 | - | 1080 | mW (all channels, TGC mode, no signal) |
| Operating Temperature Range | 0 | - | 70 | °C |
Key Features
- Includes an 8-channel voltage-controlled amplifier (VCA) and an 8-channel, 50-MSPS analog-to-digital converter (ADC).
- Provides 8-channel low-voltage differential signal (LVDS) outputs from the ADC.
- Compatible with the standard TI LVDS deserializer ADSDeSer-50EVM or TSW1250EVM.
- Communicates with a personal computer (PC) through a USB interface and optionally via RS-232 interface for microcontroller control.
- Includes multiple power management solutions for the AFE5805 and other devices, and an onboard Vcntl generator (0 V - 1.2 V).
- Fast overload recovery within two clock cycles.
- Programmable low-pass filter with selectable bandwidths of 10 MHz or 15 MHz.
- Signal-to-noise ratio (SNR) enhancement mode useful at high gains.
Applications
The AFE5805EVM is primarily designed for evaluating the AFE5805 in ultrasound systems. It is particularly useful in medical imaging applications where high signal integrity and low noise are critical. The module can be used in various ultrasound system designs to optimize the performance of the AFE5805, ensuring high-quality imaging and diagnostic capabilities.
Q & A
- What is the primary purpose of the AFE5805EVM?
The AFE5805EVM is an evaluation module designed to characterize and evaluate the performance of the AFE5805, an analog front-end device for ultrasound systems.
- What are the key components of the AFE5805?
The AFE5805 includes an 8-channel voltage-controlled amplifier (VCA) and an 8-channel, 50-MSPS analog-to-digital converter (ADC).
- What type of outputs does the AFE5805 provide?
The AFE5805 provides 8-channel low-voltage differential signal (LVDS) outputs from the ADC.
- How does the AFE5805EVM communicate with a PC?
The AFE5805EVM communicates with a personal computer (PC) through a USB interface and optionally via RS-232 interface for microcontroller control.
- What are the power supply requirements for the AFE5805EVM?
The AFE5805EVM requires only ±5-V power supplies for operation.
- What is the significance of the LEDs on the AFE5805EVM board?
The LEDs indicate the normal operation of the power supplies and the MCU. LED1 and LED2 indicate +3.3-V power supply operation, LED3 indicates MCU operation, and LED4 indicates 1.8-V power supply operation.
- Can the AFE5805EVM be used with external references?
- What is the signal-to-noise ratio (SNR) of the AFE5805?
- How does the AFE5805 handle overload recovery?
- What are the typical applications of the AFE5805EVM?
