ADA4433-1

全差分标清视频滤波器放大器,输出具有电池短路保护功能
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产品详情

ADA4433-1是一款完全集成的视频重构滤波器,输出上集成过压保护(电池短路[STB]保护)和接地短路保护[STG],具有出色的视频特性和低功耗特性。凭借STB保护和鲁棒的ESD耐受性能,ADA4433-1能够在恶劣的汽车应用环境中提供卓越的保护。

该器件是一款全差分视频滤波器,可用作差分输入至差分输出滤波器或单端输入至差分输出滤波器。它能够驱动双绞线或同轴电缆,且线路衰减极小。差分信号处理可降低接地噪声对接地参考系统的影响。ADA4433-1适合整个信号链的差分信号处理(增益和滤波),大大简化了单端和差分元件之间的转换。

ADA4433-1集成电池短路保护功能,能够防止受到因电池意外短路导致出现高达18 V电压而引起的直流和瞬态过压事件影响。ADI公司的电池短路保护技术使得无需使用大型输出耦合电容和其它复杂电路来保护标准视频放大器,从而节省了空间和成本。

ADA4433-1内置一个高阶滤波器,该滤波器的−3 dB截止频率响应出现在10 MHz且在27 MHz时提供45 dB抑制性能。该器件还具有大小为2 V/V的内部固定增益,因此非常适合标清视频应用,包括NTSC和PAL。

ADA4433-1采用2.7 V至3.6 V单电源供电,同时提供要求最严苛的视频系统所需的动态范围。

ADA4433-1采用8引脚、3 mm × 3 mm LFCSP封装,额定工作温度范围为−40°C至+125°C的宽汽车应用温度范围。

应用
- 汽车后视摄像头
- 汽车视频电子控制单元(ECU)
- 监控视频系统

产品生命周期

checked 量产

该产品系列中至少有一个型号已量产并可供采购。该产品适合用于新设计,但也可能有更新的替代产品。

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EVAL-ADA4433-1 电路图

产品详情

The ADA4433-1BCP-EBZ evaluation board makes it easy for designers to quickly observe the performance of the ADA4433-1 video filter in real-world applications. Input signals are applied through the SMA jacks (+IN, −IN), and outputs are taken from SMA jacks (+OUT, −OUT). Power is applied through the red +VS test point. Ground the black GND test point. The ADA4433-1 operates on a single-supply voltage ranging from 2.6 V to 3.6 V, and draws approximately 14 mA.

The evaluation board is configured with an input termination resistor (R1) of 75 Ω. Chose this resistor to provide the correct termination or load for the input signal source. For example, current-mode video digital-to-analog converter (DAC) outputs that require a 300 Ω load resistance. In this case, replace R1 with a 300 Ω resistor.

The ADA4433-1 inputs can be driven by either a balanced or an unbalanced source. For unbalanced signals, bias the unused input (−IN) to approximately 0.5 V. For a 3.3 V supply, this can be achieved by using the on-board voltage divider by setting R2 = 1.33 kΩ and R3 = 7.5 kΩ. Populate the decoupling capacitor (C3) with 0.1 μF to help eliminate noise. By default, the ADA4433-1BCP-EBZ is configured for single-ended input operation where the input signal is applied to SMA (+IN). For a balanced input configuration, R4 provides placement for the differential termination resistor.

The ADA4433-1BCP-EBZ evaluation board is configured to drive a back terminated 150 Ω differential load. Series back-termination resistors (37.5 Ω each) are installed on both outputs. These can be changed to match the actual differential load impedance.

The ADA4433-1 can be powered down (disabled) by grounding the green ENA test point at the top left of the evaluation board. On the evaluation board, this pin is pulled up to +VS through the 4.7 kÙ resistor (R7).

In normal operation, the short-to-battery output flag (STB) is held at a logic low. During a short-to-battery fault condition (where a voltage ranging from 5 V to 18 V is applied to either or both outputs), the STB output voltage is driven to a logic high state. The STB yellow test point (lower left side of the evaluation board) can be used to monitor the short-to-battery output flag function.

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ADA4433-1 材料声明
PCN-PDN信息 质量和可靠性 原理图符号和PCB封装

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所示报价为单片价格。所列的美国报价单仅供预算参考,指美元报价(每片美国离岸价),如有修改恕不另行通知。由于地区关税、商业税、汇率及手续费原因,国际报价可能不同。