Features
- Low Supply Current 5.8mA
- High Input Impedance 1MΩ
- Wide -3dB Bandwidth 330MHz
- Very Fast Slew Rate 1000V/µs
- Gain Flatness (to 75MHz) ±0.1dB
- Differential Gain 0.02%
- Differential Phase 0.03 Degrees
- Pin Compatible Upgrade for CLC406
HFA1105 Functional Diagram
Description
The HFA1105 is a High-Speed, low power current feedback amplifier built with Intersil's proprietary complementary bipolar UHF-1 process. This amplifier features an excellent combination of low power dissipation (58mW) and high performance. The slew rate, bandwidth, and low output impedance (0. 08Ω) make this amplifier a good choice for driving Flash ADCs. Component and composite video systems also benefit from this op amp's excellent gain flatness, and good differential gain and phase specifications. The HFA1105 is ideal for interfacing to Intersil's line of video crosspoint switches (HA4201, HA4600, HA4314, HA4404, HA4344), to create high performance, low power switchers and routers. The HFA1105 is a low power, high performance upgrade for the CLC406. For a comparable amplifier with output disable or output limiting functions, please see the data sheets for the HFA1145 and HFA1135 respectively. For Military grade product, please refer to the HFA1145/883 data sheet.
Applications
- Flash A/D Drivers
- Video Switching and Routing
- Professional Video Processing
- Video Digitizing Boards/Systems
- Multimedia Systems
- RGB Preamps
- Medical Imaging
- Hand Held and Miniaturized RF Equipment
- Battery Powered Communications
| Part Number | Status | Samples | Stock | RoHS | Package | Lead Count (#) | Carrier Type | Moisture Sensitivity Level (MSL) | Pb (Lead) Free | Pb Free Category | Temp. Range (°C) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| HFA1105IBZ | Obsolete | N/A | In Stock | RoHS:EN | SOIC | 8# | Tube | 3 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C |
| HFA1105IBZ96 | Obsolete | N/A | Out of Stock | RoHS:EN | SOIC | 8# | Reel | 3 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°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.
- Price Increase NoticePDF 257 KB PIN19006 Mar 01, 2019
- 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.
- Product Change NoticePDF 152 KB PCN12085 Nov 07, 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 843 KB an535 Jun 05, 2002AI-generated Summary: 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.
- Application NotePDF 405 KB an9663 Apr 12, 1999AI-generated Summary: The document explains converting voltage-feedback amplifiers (VFAs) to current-feedback amplifiers (CFAs), emphasizing the critical role of the feedback resistor in stability and bandwidth. It highlights layout considerations to minimize stray capacitance and noise, advises on component selection, and discusses noise characteristics and accuracy differences between CFAs and VFAs. CFAs offer better high-frequency performance and cost advantages but require careful design adjustments.
- Application NotePDF 312 KB an9202 Aug 22, 1998AI-generated Summary: This document provides important legal notices and disclaimers regarding the use of Renesas Electronics products, including limitations of liability, warranty disclaimers, and intellectual property rights. It classifies products into standard and high-quality grades with specific application guidelines. Users must comply with environmental and export regulations and ensure safe design practices. Renesas disclaims liability for misuse, modifications, or use outside specified conditions. Contact information for global sales offices is provided.
- Application NotePDF 334 KB an9787 Aug 20, 1998AI-generated Summary: Current Feedback Amplifiers (CFAs) offer improved high-frequency performance and stability control through the adjustment of feedback resistor RE, which trades bandwidth for stability. CFAs maintain bandwidth largely independent of closed loop gain, unlike Voltage Feedback Amplifiers (VFAs). Slew rate depends on error current and input buffer performance, with inverting gain configurations achieving faster slew rates. CFAs require a feedback resistor and cannot replace VFAs in unity gain configurations without it. Excessive input capacitance or long PCB traces can cause instability. CFAs do not support classic inverting integrators but can use non-inverting integrators instead.
- Application NotePDF 328 KB an9757 Aug 19, 1998AI-generated Summary: The document presents design examples for single supply DC-coupled operational amplifier circuits using resistor ratio calculations derived from given input-output voltage data. It explains how to solve simultaneous equations to determine slope and intercept, then applies these to select resistor values for practical circuit implementation. The conclusion emphasizes that single supply op amp designs are as feasible as split supply designs if proper biasing and input protection are included. It also highlights limitations such as input voltage range and output saturation. Additionally, the document includes important legal disclaimers and contact information for Renesas Electronics sales offices worldwide.
- Application NotePDF 585 KB an9420 Aug 19, 1998AI-generated Summary: The document explains current feedback amplifier (CFA) theory, focusing on non-inverting and inverting circuit models, stability criteria using Bode plots, and the impact of feedback and input impedances on stability and bandwidth. It highlights the minor effect of closed loop gain on stability due to input buffer impedance and discusses the trade-off between DC precision and stability. The analysis includes frequency-dependent behavior of key parameters and the influence of input capacitance on stability.
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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.
- 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 843 KB an535 Jun 05, 2002AI-generated Summary: 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.
- Application NotePDF 405 KB an9663 Apr 12, 1999AI-generated Summary: The document explains converting voltage-feedback amplifiers (VFAs) to current-feedback amplifiers (CFAs), emphasizing the critical role of the feedback resistor in stability and bandwidth. It highlights layout considerations to minimize stray capacitance and noise, advises on component selection, and discusses noise characteristics and accuracy differences between CFAs and VFAs. CFAs offer better high-frequency performance and cost advantages but require careful design adjustments.View More (9)
Application Notes & White Papers (9)
- Price Increase NoticePDF 257 KB PIN19006 Mar 01, 2019
- Product Change NoticePDF 152 KB PCN12085 Nov 07, 2012
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