THAT4305Q16-U 模拟引擎动态处理器

  • 预调整的 VCA 和 RMS 电平检测器
  • 宽电源电压范围:±4.5V 至 ±16V
  • 低电源电流:典型值为 3.5 mA。(±15V)
  • 宽动态范围:117 dB (VCA),60 dB(RMS 电平检测器)


电源电压(最低) Supply Voltage (minimum) ±4.5V
电源电压(最大) Supply Voltage (maximum) ±16V
电源类型 Supply Type Dual
电源电流 Supply Current 3.5mA
总谐波失真 Total Harmonic Distortion 0.07%
总增益范围 Total Gain Range ±60dB


THAT4305 是一款单芯片模拟引擎,针对低成本应用进行了优化。

它集成了高性能 Blackmer® 压控放大器 (VCA) 和对数响应 RMS 电平传感器。VCA 和 RMS 检测器在晶圆阶段预先微调,无需进一步调整即可提供低失真。

4305 仅采用小型 (QSOP) 表面贴装封装,面向线路操作的音频应用,例如压缩器/限幅器、门限和其他动态处理器。该部件通常在高达+ 16 Vdc的分离电源电压下工作,在+ 15 V 时仅消耗 3.5 mA 。该 IC 也可在低至+ 4.5 V 的电源电压下工作 ,因此也可用于某些电池供电产品。

4305 专为用于低成本动态处理器而开发。VCA 控制端口和探测器输入和输出都可用于用户配置的连接。因此,该部件极其灵活,可针对各种应用进行配置,包括单频段和多频段压扩器、数字过载保护器、压控推子、电平指示器等。

真正将 4305 与其他制造商的产品区分开来的是其 Blackmer VCA 的透明声音,再加上其准确的真有效值电平检测器。这使得该 IC 可用于各种模拟音频产品

演示板 THAT4305DEMO 可用于该产品。

The THAT4305 is a single-chip Analog Engine optimized for low-cost applications.

It incorporates a high-performance Blackmer® voltage-controlled amplifier (VCA) and log-responding RMS-level sensor. The VCA and RMS detector are pre-trimmed at wafer stage to deliver low distortion without further adjustment.

Available only in a small (QSOP) surface- mount package, the 4305 is aimed at line-operated audio applications such as compressor/limiters, gates, and other dynamic processors. The part normally operates from a split supply voltage up to +16 Vdc, drawing only 3.5 mA at +15 V. This IC also works at supply voltages as low as +4.5 V, making it useful in some battery-operated products as well.

The 4305 was developed specifically for use in low-cost dynamics processors. Both VCA control ports and the detector input and output are available for user configured connection. As a result, the part is extremely flexible and can be configured for a wide range of applications including single- and multi-band companders, digital overload protectors, voltage-controlled faders, level indicators, etc.

What really sets the 4305 apart from other manufacturers' offerings is the transparent sound of its Blackmer VCA, coupled with its accurate true-RMS level detector. This makes the IC useful in a wide range of analog audio products

Demonstration Board THAT4305DEMO is available for this product.


THAT 4301 to 4305 SchematicData SheetTHAT 4301 to 4305 Transition Guide