Intersil ISL28x17 40V精密低功耗运算放大方案

Intersil 公司的ISL28117 和ISL28217是 40V非常高精密的低功耗(440μA)运算放大器,具有低噪音(8nV/Hz),低输入失调(±50μV),低IBIAS低IBIAS电流(±1nA)和低温度漂移(±5pA/℃),非常适合用在高DC精度和高AC性能的地方如精密仪表,医疗仪表,频谱分析仪,有源滤波器,数据采集和电源控制.本文介绍ISL28117 和ISL28217主要特性, SPICE 电路图, Sallen-Key 低通滤波器(10kHz)电路图, 放大基本配置电路图以及评估板ISL282X7SOICEVAL2Z 电路图和元件列表.

40V Precision Low Power Operational Amplifiers ISL28117, ISL28217

The ISL28117 and ISL28217 are a family of very high precision amplifiers featuring low noise vs power consumption, low offset voltage, low IBIAS current and low temperature drift making them the ideal choice for applications requiring both high DC accuracy and AC performance. The combination of precision, low noise, and small footprint provides the user with outstanding value and flexibility relative to similar competitive parts.

Applications for these amplifiers include precision active filters, medical and analytical instrumentation, precision power supply controls, and industrial controls.

The ISL28117 single and ISL28217 dual are offered in an 8 Ld SOIC package. Both devices are offered in standard pin configurations and operate over the extended temperature range to -40℃ to +125℃.

ISL28x17主要特性:

• Low Input Offset . . . . . . . . . . . . . . ±50μV, Max.

• Superb Offset TC . . . . . . . . . . . . 0.6μV/¡ãC, Max.

• Input Bias Current . . . . . . . . . . . . . . ±1nA, Max.

• Input Bias Current TC . . . . . . . . . .±5pA/℃, Max.

• Low Current Consumption . . . . . . . . . . . . . 440μA

• Voltage Noise. . . . . . . . . . . . . . . . . . . . . 8nV/Hz

• Wide Supply Range. . . . . . . . . . . . . . 4.5V to 40V

• Operating Temperature Range . . -40℃to +125℃

• Small Package Offerings in Single and Dual

• Pb-Free (RoHS Compliant)

ISL28x17应用:

• Precision Instruments

• Medical Instrumentation

• Spectral Analysis Equipment

• Active Filter Blocks

• Thermocouples and RTD Reference Buffers

• Data Acquisition

• Power Supply Control


图1.ISL28x17 SPICE 电路图

图2.ISL28x17 Sallen-Key 低通滤波器(10kHz)

The ISL282X7SOICEVAL2Z evaluation board is a design platform containing all the circuitry needed to characterize critical performance parameters of the ISL282X7 operational amplifiers in SOIC-8 package, using a variety of user defined test circuits.

The ISL282X7 operational amplifiers feature low bias current, low noise, and low offset and temperature drift.

评估板ISL282X7SOICEVAL2Z主要特性:

Evaluation Board Key Features

The ISL282X7SOICEVAL2Z is designed to enable the IC to operate from a single supply, +4.5VDC to +40VDC or from split supplies, ±2.25VDC to ±20V. The board is configured for a dual op amp connected for differential input with a closed loop gain of 10. A single external reference voltage (VREF) pin and provisions for a user-selectable voltage divider - filter are included.

图3.ISL28x17放大基本配置电路图

图4. 评估板ISL282X7SOICEVAL2Z 电路图

评估板ISL282X7SOICEVAL2Z 元件列表: