特性
- 120µA typical supply current for both channels
- 30pA max input bias current
- 100dB CMRR, PSRR
- 0.7µV/°C offset voltage temperature coefficient
- 180kHz 3dB Bandwidth - ISL28271
- 100kHz 3dB Bandwidth - ISL28272
- 0.5V/µs slew rate
- Single supply operation
- Rail-to-rail input and output (RRIO)
- Input is capable of swinging above V+ and below V- (ground sensing)
- 0.081%1 typical gain error - ISL28271
- -0.19%1 typical gain error - ISL28272
- Pb-free available (RoHS compliant)
ISL28271 Functional Diagram
描述
Support is limited to customers who have already adopted these products.
The ISL28271 and ISL28272 are dual micropower instrumentation amplifiers (in-amps) optimized for single supply operation over the +2. 4V to +5. 5V range. Both devices feature an Input Range Enhancement Circuit (IREC) which maintains CMRR performance for input voltages equal to the positive and negative supply rails. The input signal is capable of swinging 10% above the positive supply rail and to 100mV below the negative supply with only a slight degradation of the CMRR performance. The output operation is rail-to-rail. The ISL28271 is compensated for a minimum gain of 10 or more. For higher gain applications, the ISL28272 is compensated for a minimum gain of 100. The in-amps have CMOS input devices for maximum input common voltage range. The amplifiers can be operated from one lithium cell or two Ni-Cd batteries.
应用
- Battery- or solar-powered systems
- Strain gauge
- Sensor signal conditioning
- Medical devices
- Industrial instrumentations
| Part Number | Status | Samples | Stock | Package | Lead Count (#) | Carrier Type | Pb (Lead) Free | Temp. Range (°C) |
|---|---|---|---|---|---|---|---|---|
| ISL28271FAZ | Obsolete | N/A | In Stock | QSOP | 16# | Tube | No | -40 to +125°C |
| ISL28271FAZ-T7 | Obsolete | N/A | Out of Stock | QSOP | 16# | Reel | No | -40 to +125°C |
加载中
- 应用说明英语PDF 564 KB an1993 2018年5月22日AI 生成的摘要: Voltage feedback (VFB) amplifiers use a differential input pair, a high-impedance stage, and an output buffer to convert input voltage differences into output voltage. The VFB amplifier's gain decreases at a dominant pole frequency due to compensation capacitors. Current feedback (CFB) amplifiers include a class AB input amplifier, current mirror, high-impedance stage, and output buffer. CFB amplifiers provide faster switching and higher slew rates by drawing charge/discharge currents directly from supply rails, unlike VFB amplifiers which are limited by biasing current sources.
- EOL 通告英语PDF 200 KB PLC15033 2015年6月11日
- 产品变更通告英语PDF 529 KB PCN12091 2012年12月04日
- 应用说明英语PDF 1.59 MB an1298 2009年1月22日AI 生成的摘要: The document explains various instrumentation amplifier configurations, including difference amplifiers, two-amplifier, and classic three-amplifier topologies, focusing on gain setting, common mode rejection ratio (CMRR), and resistor matching requirements. It highlights the importance of resistor tolerance for high CMRR and discusses input impedance and voltage limitations. The document also describes monolithic instrumentation amplifiers with integrated resistor trimming, gain setting via external resistors, and key specifications such as input stage types, supply current, bandwidth, and noise performance.
- 应用说明英语PDF 357 KB an1694 2004年1月19日AI 生成的摘要: The document outlines the four fundamental internal blocks of an operational amplifier and presents a simple 2:1 stage circuit diagram. It includes important legal notices from Renesas Electronics regarding the use, liability, and intellectual property rights of their semiconductor products. The document clarifies product quality grades, intended applications, and restrictions on use in life-critical or hazardous systems. It emphasizes compliance with applicable laws and safety responsibilities when using Renesas products. Contact information for Renesas sales offices worldwide is also provided.
- 应用说明英语PDF 1.02 MB an1613 2004年1月19日AI 生成的摘要: The document details the process of importing SPICE netlists into Allegro Design Entry CIS for simulation. It guides users through verifying no errors during schematic translation, associating and replacing symbols for SPICE models, and mapping model pins to symbol pins. It also explains setting up new projects, creating simulation profiles, adding libraries, and configuring analysis types such as AC Sweep/Noise. The instructions emphasize selecting appropriate symbols based on pin count and ensuring all files reside in the same directory for smooth simulation setup.
- 应用说明英语PDF 556 KB an1561 2004年1月19日AI 生成的摘要: This document investigates radiated interference in audio circuits using precision amplifiers. It compares the ISL28291 bipolar input and EL5220 MOSFET input operational amplifiers across frequencies from 100kHz to 6GHz. Results show the EL5220 exhibits significantly lower interference, especially in Bluetooth frequency bands. Higher feedback resistor values and RFI capacitors reduce interference, but placing the antenna near the IC increases it. MOSFET inputs prove less susceptible to interference than bipolar types. Antenna placement and radiation patterns critically affect circuit performance in sensitive audio applications.
- 应用说明英语PDF 2.04 MB an1560 2004年1月19日AI 生成的摘要: This document explains how to accurately measure voltage and current noise in operational amplifiers down to 0.1Hz. It details the importance of setting the post amplifier gain to overcome the dynamic signal analyzer's noise floor, using external AC coupling to avoid measurement errors, and employing a Faraday cage to reduce environmental noise. It also discusses selecting the appropriate series resistor to distinguish current noise from Johnson noise and optimizing measurement algorithms to separate internal and external noise components.
- 应用说明英语PDF 976 KB an1556 2004年1月19日AI 生成的摘要: The document details building an accurate SPICE model for low noise, low power precision amplifiers, focusing on the ISL28127 device. It explains the modeling of various amplifier stages, including the voltage noise stage, input stage, gain stages, mid supply reference, common mode gain, supply isolation, and output stage. Key modeling techniques involve noise reduction, gain setting, current sourcing, and output short circuit protection. The document also describes how voltage-controlled current sources operate within the model to simulate amplifier behavior accurately.
- 应用说明英语PDF 843 KB an535 2002年6月05日AI 生成的摘要: A Data Acquisition System (DAS) requires careful design of signal conditioning, transducer selection, and signal transmission to ensure high accuracy. Signal conditioning includes multiplexing, amplification, filtering, and calibration, ideally performed near the transducer. Transducers convert physical variables to electrical signals, often voltage, with low source resistance preferred. Signal paths can be single-ended or differential; differential paths better reject common mode noise, especially for low-level signals. Shielded twisted pairs and balanced lines reduce interference. Filters, typically Butterworth low-pass, prevent aliasing and maintain signal integrity.
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- 应用说明英语PDF 564 KB an1993 2018年5月22日AI 生成的摘要: Voltage feedback (VFB) amplifiers use a differential input pair, a high-impedance stage, and an output buffer to convert input voltage differences into output voltage. The VFB amplifier's gain decreases at a dominant pole frequency due to compensation capacitors. Current feedback (CFB) amplifiers include a class AB input amplifier, current mirror, high-impedance stage, and output buffer. CFB amplifiers provide faster switching and higher slew rates by drawing charge/discharge currents directly from supply rails, unlike VFB amplifiers which are limited by biasing current sources.
- 应用说明英语PDF 1.59 MB an1298 2009年1月22日AI 生成的摘要: The document explains various instrumentation amplifier configurations, including difference amplifiers, two-amplifier, and classic three-amplifier topologies, focusing on gain setting, common mode rejection ratio (CMRR), and resistor matching requirements. It highlights the importance of resistor tolerance for high CMRR and discusses input impedance and voltage limitations. The document also describes monolithic instrumentation amplifiers with integrated resistor trimming, gain setting via external resistors, and key specifications such as input stage types, supply current, bandwidth, and noise performance.
- 应用说明英语PDF 357 KB an1694 2004年1月19日AI 生成的摘要: The document outlines the four fundamental internal blocks of an operational amplifier and presents a simple 2:1 stage circuit diagram. It includes important legal notices from Renesas Electronics regarding the use, liability, and intellectual property rights of their semiconductor products. The document clarifies product quality grades, intended applications, and restrictions on use in life-critical or hazardous systems. It emphasizes compliance with applicable laws and safety responsibilities when using Renesas products. Contact information for Renesas sales offices worldwide is also provided.
- 应用说明英语PDF 1.02 MB an1613 2004年1月19日AI 生成的摘要: The document details the process of importing SPICE netlists into Allegro Design Entry CIS for simulation. It guides users through verifying no errors during schematic translation, associating and replacing symbols for SPICE models, and mapping model pins to symbol pins. It also explains setting up new projects, creating simulation profiles, adding libraries, and configuring analysis types such as AC Sweep/Noise. The instructions emphasize selecting appropriate symbols based on pin count and ensuring all files reside in the same directory for smooth simulation setup.
- 应用说明英语PDF 556 KB an1561 2004年1月19日AI 生成的摘要: This document investigates radiated interference in audio circuits using precision amplifiers. It compares the ISL28291 bipolar input and EL5220 MOSFET input operational amplifiers across frequencies from 100kHz to 6GHz. Results show the EL5220 exhibits significantly lower interference, especially in Bluetooth frequency bands. Higher feedback resistor values and RFI capacitors reduce interference, but placing the antenna near the IC increases it. MOSFET inputs prove less susceptible to interference than bipolar types. Antenna placement and radiation patterns critically affect circuit performance in sensitive audio applications.查看更多 (8)
应用说明和白皮书 (8)
- EOL 通告英语PDF 200 KB PLC15033 2015年6月11日
- 产品变更通告英语PDF 529 KB PCN12091 2012年12月04日
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