Analog Devices Inc. AD8338 18MHz 可变增益放大器
Analog Devices AD8338 是一款可变增益放大器(VGA)，适合要求全差分信号路径、低功耗、低噪声和在LF至18MHz频段内具有精确定义增益的应用。如果需要的话，该器件也可以采用单端信号源工作。基本增益函数为线性dB，标称增益范围为0dB至80dB；标称增益范围与增益引脚上0.1V至1.1V的控制电压相对应。增益范围可以通过直接连接至内部求和结点的INPD和INMD引脚进行上下调节。AD8338包含额外的电路来实现失调校正和自动增益控制功能。该ADI VGA适用于电感遥测系统前端等多种场合。
特性
- 3mA supply current at gain of 40dB
- Low frequency (LF) to 18MHz operation
- 3.0V to 5.0V Supply range
- Adjustable gain range
- Low noise:
- 4.5nV/√Hz
- 1.5nV/√Hz with 50√Hz input resistors
- Fully differential signal path
- Offset correction (offset null) feature
- Adjustable bandwidth
- Internal 1.5V reference
- 16-lead LFCSP
- Automatic gain control feature
- Wide gain range for high dynamic range signals
应用
- Front end for inductive telemetry systems
- Ultrasonic signal receivers
- RF baseband signal conditioning
- Portable and hand held instrumentation
- Low power PGA, VGA or AGC applications
Additional Resources
Design a Powerful Signal Generator Output Stage
How to design a small and inexpensive output stage with a voltage gain amplifier (VGA) and a current feedback amplifier (CFA).
Block Diagram
发布日期: 2013-06-28
| 更新日期: 2022-03-11