Features
- 39µA typical supply current
- 5nA max input bias current
- 250kHz gain bandwidth product (AV = 1)
- 2.4V to 5.5V single supply voltage range
- Rail-to-rail input and output
- Enable pin
- Pb-free (RoHS compliant)
ISL28156 Functional Diagram
Description
Support is limited to customers who have already adopted these products.
The ISL28156 is a micropower precision operational amplifier optimized for single supply operation at 5V and can be operated down to 2. 4V. This device features an Input Range Enhancement Circuit (IREC), which enables it to maintain CMRR performance for input voltages greater than the positive supply. The input signal is capable of swinging 0. 5V above a 5. 0V supply (0. 25V for a 2. 5V supply) and to within 10mV from ground. The output operation is rail-to-rail. The 1/f corner of the voltage noise spectrum is at 1kHz. This results in low frequency noise performance, which can only be found on devices with an order of magnitude higher than the supply current. The ISL28156 can be operated from one lithium cell or two Ni-Cd batteries. The input range includes both positive and negative rail. The output swings to both rails.
Applications
- Battery- or solar-powered systems
- 4mA to 20mA current loops
- Handheld consumer products
- Medical devices
- Sensor amplifiers
- ADC buffers
| Part Number | Status | Samples | Stock | Package | Lead Count (#) | Carrier Type | Pitch (mm) | Pkg. Dimensions (mm) | Pb (Lead) Free | Temp. Range (°C) |
|---|---|---|---|---|---|---|---|---|---|---|
| ISL28156FBZ | Obsolete | N/A | In Stock | SOICN | 8# | Tube | 1.3mm | 4.9 x 3.9 x 0.00 | No | -40 to +125°C |
| ISL28156FBZ-T7 | Obsolete | N/A | Out of Stock | SOICN | 8# | Reel | 1.3mm | 4.9 x 3.9 x 0.00 | No | -40 to +125°C |
| ISL28156FHZ-T7 | Obsolete | N/A | Out of Stock | SOT23 | 6# | Reel | 1mm | 2.9 x 1.6 x 0.00 | No | -40 to +125°C |
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- Application NotePDF 564 KB an1993 May 22, 2018AI-generated Summary: 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.
- Model - SPICETXT 5 KB isl28156-design-model Nov 17, 2017
- End Of Life NoticePDF 200 KB PLC15033 Jun 11, 2015
- Product Change NoticePDF 557 KB PCN13022 Feb 28, 2013
- Product Change NoticePDF 152 KB PCN12085 Nov 07, 2012
- Product Change NoticePDF 135 KB PCN12084 Oct 15, 2012
- Application NotePDF 357 KB an1694 Jan 19, 2004AI-generated Summary: 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.
- Application NotePDF 1.02 MB an1613 Jan 19, 2004AI-generated Summary: 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.
- Application NotePDF 556 KB an1561 Jan 19, 2004AI-generated Summary: 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.
- Application NotePDF 2.04 MB an1560 Jan 19, 2004AI-generated Summary: 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.
- Application NotePDF 976 KB an1556 Jan 19, 2004AI-generated Summary: 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.
- Application NotePDF 8.19 MB an1548 Jan 19, 2004AI-generated Summary: The iSim Active Filter Designer sequences poles from high Q to low Q in ascending gains to reduce output clipping and noise. It allows manual or semi-automatic pole and gain entry, placing real poles last for noise and stopband advantages. The design process involves defining constraints, selecting op amps, and simulating solutions. Users can preview filter shapes or manually input poles from external tools. The tool supports multi-stage designs with selectable op amps based on supply voltage and output swing requirements.
Recommended Documents (1)
Datasheets (1)
Manuals & Guides (1)
- Application NotePDF 564 KB an1993 May 22, 2018AI-generated Summary: 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.
- Application NotePDF 357 KB an1694 Jan 19, 2004AI-generated Summary: 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.
- Application NotePDF 1.02 MB an1613 Jan 19, 2004AI-generated Summary: 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.
- Application NotePDF 556 KB an1561 Jan 19, 2004AI-generated Summary: 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.
- Application NotePDF 2.04 MB an1560 Jan 19, 2004AI-generated Summary: 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.View More (8)
Application Notes & White Papers (8)
- End Of Life NoticePDF 200 KB PLC15033 Jun 11, 2015
- Product Change NoticePDF 557 KB PCN13022 Feb 28, 2013
- Product Change NoticePDF 152 KB PCN12085 Nov 07, 2012
- Product Change NoticePDF 135 KB PCN12084 Oct 15, 2012
Product Notices (PCN, EOL, etc) (5)
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