Analog Devices Inc. Analog Devices ADA4530-1放大器
Analog Devices ADA4530-1毫微微安级 (10A - 15A) 输入偏置电流静电计放大器适用于作为包括集成保护缓存的静电计。集成保护缓冲器使输入针脚与印刷电路板 (PCB) 的泄漏信号分离开，使板上元件最少，并使系统设计变得容易。ADA4530-1 放大器工作电压范围为 4.5V 至 16V，这使它可以方便应用于 5V 和 10V 单电压及 ±2.5V 和 ±5V 双电源供电的系统中。该器件具有±20fA的超低输入偏置电流（TA= 25°C时），超过指定CMRR范围时的最大50μV低偏移电压，0.13μV/°C的低失调漂移（典型值），以及10KHz时14nV/√Hz的低电压噪声密度。使系统动态范围最大化，ADA4530-1放大器具有轨到轨输出机制，可以驱动低于10千欧负载小于30mV内的电源轨。ADA4530-1放大器采用行业标准的表面安装8引脚SOIC封装，其经过优化的独特引脚分配可防止敏感输入引脚、电源和输出引脚之间的信号发生耦合，同时确保方便实现护圈路由跟踪。
- Isolate the input pins from leakage in the printed circuit board (PCB)
- Minimize board component count
- Enable ease of system design
The ADA4530-1 amplifiers have a 4.5V to 16V operating voltage range. The voltage range allows the amplifiers to operate in conventional 5V and 10V single-supply systems as well as ±2.5V and ±5V dual supply systems.
The devices provide ultra-low input bias currents of ±20fA at TA = 25°C, the low offset voltage of 50μV maximum over specified CMRR range, low offset drift of 0.13μV/°C (typical), and low voltage noise density of 14nV/√Hz at 10kHz. To maximize the dynamic range of the system, the ADA4530-1 amplifiers have a rail-to-rail output stage that can typically drive to within 30mV of the supply rails under a 10 kΩ load.
The ADA4530-1 amplifiers are available in an industry-standard surface-mount 8-lead SOIC package with a unique pinout optimized to prevent signals from the coupling between the sensitive input pins, the power supplies, and the output pin while enabling easy routing of the guard ring traces.
特性
- Low offset voltage: 50μV maximum over specified CMRR range
- Offset drift: 0.13μV/°C typical, 0.5μV/°C maximum
- Integrated guard buffer with 100μV maximum offset
- Low voltage noise density: 14nV/√Hz at 10kHz
- Wide bandwidth: 2MHz unity-gain crossover
- Supply voltage: 4.5V to 16V (±2.25V to ±8V)
- Operating temperature: −40°C to +125°C
Simplified Schematic
Pin Connection Diagram
