Analog Devices Inc. 亚德诺半导体 ADA4610-2 精密放大器
亚德诺半导体 ADA4610-2 放大器是一款双通道、精密 JFET 放大器，具有独特结构，将高精密性和高速特性集成到高压和低功耗运放中。JFET 输入级结构提供了低输入偏置电流、高带宽、高增益、低噪声等优点，当施加的输入电压超过最大共模电压范围时，ADA4610-2 不会发生输出反相。输出级为轨到轨，有高驱动特性和低压差，适合拉电流和灌电流。ADA4610-2 放大器对所有增益配置均为无条件稳定，即使容性负载大幅超出 1nF 也是如此。该器件设计有内部保护电路，允许将超出电源电压 0.3V 的电压施加在任一端子，而不会引起损害。ADA4610-2 B 级可达到小于 0.4mV 的失调电压和 4μV/°C 的失调电压漂移，这通常是在非常高精密的双极输入放大器上才会出现的特性。ADA4610-2 系列的低功耗特性降低了裸片温度，即使环境温度升高也能确保较低的输入偏置电流，从而使这些放大器成为需要低泄露而无需主动冷却的应用的理想选择。ADA4610-2 放大器在从 ±5V 到 ±15V 的电源电压下额定工作于 −40°C 到 +125°C 的扩展工业温度范围内，是仪器仪表、医疗仪器、多极滤波器、精密电流测量、光电二极管放大器、音频和传感器应用的理想选择。
The JFET input stage architecture offers the advantages of low input bias current, high bandwidth, high gain, low noise, and no phase reversal when the applied input signal exceeds the common voltage range. The output stage is rail to rail with high drive characteristics and low dropout voltage for both sinking and sourcing currents. ADA4610-2 amplifiers are unconditionally stable for all gain configurations, even with capacitive loads well in excess of 1nF.
The devices are designed with internal protective circuitry that allows voltages as high as 0.3V beyond the supplies to be applied at the input of either terminal without causing damage. The ADA4610-2 B grades achieve less than 0.4mV of offset and 4μV/°C of offset drift, which are characteristics that are usually associated with very high precision bipolar input amplifiers.
The low power consumption characteristic of the ADA4610-2 family minimizes the die temperature, which warrants low input bias currents even at elevated ambient temperatures, making the amplifiers ideal for applications that require low leakage specifications without active cooling.
Fully specified with supply voltages from ±5V to ±15V over the extended industrial temperature range of −40°C to +125°C, ADA4610-2 Amplifiers are ideal for instrumentation, medical instruments, multipole filters, precision current measurement, photodiode amplifiers, audio, and sensors.
特性
- Low offset voltage:
- B grade: 0.4mV maximum
- A grade: 1mV maximum
- Low offset voltage drift:
- B grade: 4μV/°C maximum
- A grade: 8μV/°C maximum
- Low input bias current of 5pA typical at VSY = ±15V
- Dual-supply operation of ±4.5V to ±15V
- Low noise:
- 7.3nV/√Hz typical at f = 1kHz
- 0.45μVp-p at 0.1Hz to 10Hz
- Low distortion of 0.00025%
- No phase reversal
- Rail-to-Rail Output
- Unity gain stable
应用
- Instrumentation
- Medical Instruments
- Multipole filters
- Precision current measurement
- Photodiode amplifiers
- Sensors
- Audio
Additional Resources
Understanding the Fundamentals of Earthquake Signal Sensing Networks
Modern, low cost MEMs based ground sensing technology is now capable of measurements that are on par with traditional instruments. Using the wide range of Analog Devices products, a sensing device can be implemented to cater different seismic sensing applications.
Learn More
Can You Really Get ppm Accuracies from Op Amps?
There is a march toward 1ppm accurate systems, especially now that 1 ppm linear ADCs are becoming common. This article presents op amp accuracy limitations and how to choose the few op amps that have a chance of 1ppm accuracy.
Learn More