AD605ARZ

产品概述

The AD605ARZ is a dual-channel low noise accurate linear-in-dB Variable Gain Amplifier (VGA) optimized for any application requiring high performance, wide bandwidth variable gain control. Operating from a single 5V supply, the AD605 provides differential inputs and unipolar gain control for ease of use. Added flexibility is achieved with user-determined gain range and an external reference input that provide user-determined gain scaling (dB/V). The high performance linear-in-dB response of the AD605 is achieved with the differential input, single-supply, exponential amplifier (DSX-AMP) architecture. Each of the DSX-AMPs comprises a variable attenuator of 0 dB to -48.4dB followed by a high speed, fixed-gain amplifier. The attenuator is based on a 7-stage R-1.5R ladder network. The attenuation between tap points is 6.908dB and 48.360dB for the entire ladder network.

• 2 Independent linear-in-dB channels
• Differential inputs
• Stable gain with temperature and supply variations
• Single-ended unipolar gain control
• Output common mode independently set
• Power shutdown at lower end of gain control
• Single 5V supply
• Drives ADCs directly
• 20dB/V through 40dB/V Variable gain scaling
• 90mW/channel Low power

应用

测试与测量, 工业