The AD600ARZ is a dual-channel low noise variable Gain Amplifier is optimized for use in ultrasound imaging systems but is applicable to any application requiring precise gain, low noise and distortion and wide bandwidth. Each independent channel provides a gain of 0 to +40dB. The decibel gain is directly proportional to the control voltage, accurately calibrated, supply and temperature stable. To achieve the difficult performance objectives, a proprietary circuit form, the X-AMPR, was developed. Each channel of the X-AMP comprises a variable attenuator of 0 dB to -42.14dB followed by a high speed fixed gain amplifier. In this way, the amplifier never has to cope with large inputs and can benefit from the use of negative feedback to precisely define the gain and dynamics. The attenuator is realized as a 7-stage R-2R ladder network having an input resistance of 100R, laser trimmed to ±2%.
- 2-channel with independent gain control
- Signal gating function for each amplifier
- Drive high speed ADCs
- ±0.3dB Accurate absolute gain
- ±2ns Stable group delay
- 125mW (maximum) per amplifier Low power
音频, 射频通信, 工业, 测试与测量
