Analog Devices Inc. 亚德诺半导体 ADA4500-2 零输入交越失真放大器
亚德诺半导体 ADA4500-2 零输入交越失真放大器是 10MHz、14.5nV/√Hz、低功耗放大器，具有轨到轨输入和输出摆幅，采用 2.7V 至 5.5V 单电源工作。ADA4500-2 还兼容行业标准标称电压 +3.0V、+3.3V、+5.0V 和 ±2.5V。ADA4500-2 放大器采用创新的零交越失真电路拓扑，在整个轨到轨输入共模范围内具有高线性，出色的电源电压抑制比（PSRR）与共模抑制比（CMRR）性能，不会产生传统互补轨到轨输入级常见的交越失真。由此产生的运放也具有高精度、高带宽和非常低的偏置电流。ADA4500-2 的特性组合使其成为精密传感器应用的理想选择，因其可降低电源电压变化造成的误差，在整个输入电压范围内保持高 CMRR。ADA4500-2 放大器还适合于驱动模数转换器（ADC），因为其输出不会随共模电压而失真，这样 ADC 就可以使用其满量程输入电压范围，从而最大化转换子系统的动态范围。ADA4500-2 放大器额定运行于宽幅工业温度范围 −40°C 至 +125°C 内，很适合压力 & 位置传感器、远程防盗、医疗监测、过程控制、危险检测与光敏二极管应用。
Employing a novel zero-crossover distortion circuit topology, ADA4500-2 amplifiers provide high linearity over the full, rail-to-rail input common-mode range, with excellent power supply rejection ratio (PSRR) and common-mode rejection ratio (CMRR) performance without the crossover distortion seen with the traditional complementary rail-to-rail input stage. The resulting op-amps also have excellent precision, wide bandwidth, and very low bias current.
ADA4500-2's combination of features makes it an ideal choice for precision sensor applications because it minimizes errors due to power supply variation and maintains high CMRR over the full input voltage range. The ADA4500-2 is also an excellent amplifier for driving analog-to-digital converters (ADCs) because the output does not distort with the common-mode voltage, which enables the ADC to use its full input voltage range, maximizing the dynamic range of the conversion subsystem.
特性
- Rail-to-rail input and output
- PSRR: 98dB minimum
- CMRR: 95dB minimum
- Offset voltage: 120μV maximum
- Single-supply operation: 2.7V to 5.5V
- Dual-supply operation: ±1.35V to ±2.75V
- Wide bandwidth: 10MHz
- Low noise
- 2μV p-p from 0.1Hz to 10Hz
- 14.5nV/√Hz @ 1kHz
- Low input bias current: 2pA maximum
应用
- Pressure and position sensors
- Remote security
- Medical monitors
- Process controls
- Hazard detectors
- Photodiode applications