美信推出MAX14811双通道数字脉冲发生器

MAX14811是高度集成的双通道数字脉冲发生器，采用有源钳位技术，改善脉冲信号质量

MAX14811的概述
The MAX14811 integrated circuit generates high-voltage, high-frequency unipolar or bipolar pulses from low-voltage logic inputs. The dual pulser features independent logic inputs, independent high-voltage pulser outputs with active clamps, and independent high-voltage supply inputs.

The device features fault condition management to protect the outputs. The outputs enter three-state if both INP_ and INN_ are logic-high. The device has a 9Ω output impedance for the high-voltage outputs and a 27Ω impedance for the active clamp. The high-voltage outputs are guaranteed to provide 2.0A (typ) output current. All the pulser outputs and clamp outputs have overvoltage protection.

The device uses three logic inputs per channel to control the positive and negative pulses and active clamp. Also included are two independent enable inputs. Disabling EN_ ensures the output MOSFETs are not accidentally turned on during fast power-supply ramping. This allows for faster ramp times and shorter delays between pulsing modes. A low-power shutdown mode reduces power consumption to less than 1µA. All digital inputs are CMOS compatible.

The device is available in a 7mm x 7mm, 56-pin TQFN exposed-pad package and is specified over the 0°C to +70°C commercial temperature range.

MAX14811的关键特性
Fault Condition Management
Highly Integrated, High-Voltage, High-Frequency Unipolar/Bipolar Pulser
9Ω Output Impedance and 2.0A (typ) Output Current
27Ω Active Clamp
Pulser and Clamp Overvoltage Protection
0 to +220V Unipolar or ±110V Bipolar Outputs
Matched Rise/Fall Times and Matched Propagation Delays
CMOS-Compatible Logic Inputs
7mm x 7mm, 56-Pin TQFN Package

MAX14811的应用/使用
清洗设备
工业成像/缝隙检测
压电驱动器
测试设备
超声医疗成像

MAX14811的内部功能框图