Features
- 4.5MHz gain bandwidth product
- 900µA supply current (per amplifier)
- 1.8mV maximum offset voltage
- 1pA typical input bias current
- Down to 2.4V single supply operation
- Rail-to-rail input and output
- -40 °C to +125 °C operation
- Pb-free (RoHS compliant)
ISL28148_ISL28248 Functional Diagram
Description
The ISL28248 is a 4.5MHz low-power dual operational amplifier. The part is optimized for single supply operation from 2.4V to 5.5V, allowing operation from one lithium cell or two NiCd batteries. The 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 0.25V above the positive supply and to 100mV below the negative supply with only a slight degradation of the CMRR performance. The output operation is rail-to-rail. The parts draw minimal supply current (900μA per amplifier) while meeting excellent DC accuracy, AC performance, noise and output drive specifications. Operation is guaranteed across the -40 °C to +125 °C temperature range.
Applications
- Low-end audio
- 4mA to 20mA current loops
- Medical devices
- Sensor amplifiers
- ADC buffers
- DAC output amplifiers
| Part Number | Status | Samples | Stock | RoHS | Package | Lead Count (#) | Carrier Type | Moisture Sensitivity Level (MSL) | Pitch (mm) | Pkg. Dimensions (mm) | Pb (Lead) Free | Pb Free Category | Temp. Range (°C) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ISL28248FBZ | Obsolete | N/A | In Stock | RoHS:EN | SOICN | 8# | Tube | 3 | 1.3mm | 4.9 x 3.9 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C |
| ISL28248FBZ-T7 | Obsolete | N/A | In Stock | RoHS:EN | SOICN | 8# | Reel | 3 | 1.3mm | 4.9 x 3.9 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C |
| ISL28248FUZ | Obsolete | N/A | In Stock | Contact | MSOP | 8# | Tube | 2 | 0.7mm | 3.0 x 3.0 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C |
| ISL28248FUZ-T7 | Obsolete | N/A | Out of Stock | Contact | MSOP | 8# | Reel | 2 | 0.7mm | 3.0 x 3.0 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C |
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- Application NotePDF 263 KB r13an0003eu0100-biasing-op-amps Dec 06, 2019AI-generated Summary: Proper biasing of operational amplifiers is essential to avoid malfunction in AC-coupled circuits. A missing DC bias path causes long stabilization times and potential failures. Adding input resistors to ground provides a DC path for bias currents, minimizing offset errors. For single-supply AC-coupled amplifiers, biasing uses a reference voltage, ideally from a high-PSRR voltage reference or buffered voltage divider, to maintain signal symmetry and reduce noise. Understanding frequency responses of input and feedback components is crucial for setting bandwidth and gain characteristics.
- 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 2 KB isl28138-design-model Nov 17, 2017
- PCB Design FilesZIP 216 KB isl28248soiceval1zbom_design Nov 17, 2017
- Product Change NoticePDF 98 KB PCN12094 Dec 19, 2012
- Product Change NoticePDF 152 KB PCN12085 Nov 07, 2012
- Product Change NoticePDF 135 KB PCN12084 Oct 15, 2012
- Product Change NoticePDF 117 KB PCN11059 Jun 17, 2011
- Product Change NoticePDF 52 KB PCN10052 Aug 20, 2010
Recommended Documents (1)
Datasheets (1)
- Manual - Development ToolsPDF 469 KB an1419 Feb 02, 2007
Manuals & Guides (1)
- Application NotePDF 263 KB r13an0003eu0100-biasing-op-amps Dec 06, 2019AI-generated Summary: Proper biasing of operational amplifiers is essential to avoid malfunction in AC-coupled circuits. A missing DC bias path causes long stabilization times and potential failures. Adding input resistors to ground provides a DC path for bias currents, minimizing offset errors. For single-supply AC-coupled amplifiers, biasing uses a reference voltage, ideally from a high-PSRR voltage reference or buffered voltage divider, to maintain signal symmetry and reduce noise. Understanding frequency responses of input and feedback components is crucial for setting bandwidth and gain characteristics.
- 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.View More (8)
Application Notes & White Papers (8)
- Product Change NoticePDF 98 KB PCN12094 Dec 19, 2012
- Product Change NoticePDF 152 KB PCN12085 Nov 07, 2012View More (8)
Product Notices (PCN, EOL, etc) (8)
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- PCB Design FilesZIP 216 KB isl28248soiceval1zbom_design Nov 17, 2017
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Renesas Boards & Kits
ISL28248SOICEVAL1Z
Active
4.5MHz, Dual Precision RRIO Op Amp with Very Low Input Bias Current Evaluation Board
The ISL28248SOICEVAL1Z evaluation board is a design platform containing all the circuitry needed to characterize critical performance parameters of the ISL28248 operational amplifier in the SOIC-8 package, using a variety of user-defined test circuits.
The ISL28248 is a 4.5MHz low-power dual... Read More
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- PCB Design FilesZIP 216 KB isl28248soiceval1zbom_design Nov 17, 2017
- Model - SPICETXT 2 KB isl28138-design-model Nov 17, 2017
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