Features
- User Programmable For Closed-Loop Gains of +1, -1 or +2 Without Use of External Resistors
- Wide -3dB Bandwidth 350MHz
- Low Supply Current 6mA/Buffer
- Excellent Gain Flatness (to 100MHz) ±0.08dB
- Low Differential Gain and Phase 0.03%/0.02 Degree
- Very Fast Slew Rate 1650V/µs
- Fast Settling Time (0.1%) 28ns
- High Output Current 55mA
- Excellent Gain Accuracy 0.99V/V
- Overdrive Recovery 10ns
- Standard Operational Amplifier Pinout
- Pb-Free Plus Anneal Available (RoHS Compliant)
HFA1412 Functional Diagram
Description
Support is limited to customers who have already adopted these products.
The HFA1412 is a quad closed loop Buffer featuring user programmable gain and high speed video performance. A unique feature of the HFA1412's pinout allows the user to select a voltage gain of +1, -1, or +2 (see the Application Information section). The on-chip gain setting resistors eliminate eight external resistors, thus saving board space or freeing up space for termination resistors. The on-chip feedback resistor is preset at the optimum value, and also eliminates worries about parasitic feedback capacitance. Additionally, the capacitance sensitive summing node is buried inside the package where it is unaffected by PCB parasitics. Compatibility with existing op amp pinouts provides flexibility to upgrade low gain amplifiers, while decreasing component count. Unlike most buffers, the standard pinout provides an upgrade path should a higher closed loop gain be needed at a future date. The HFA1412 is an excellent choice for component and composite video systems as indicated by the excellent gain flatness, and 0. 03%/0. 02 Degree Differential Gain/Phase specifications (RL = 150Ω). Its ability to deliver a gain of +2 with no external resistors makes it particularly desirable for applications driving double terminated cables. For Military product, refer to the HFA1412/883 data sheet.
Applications
- Video Distribution Amps
- Flash A/D Drivers
- Video Cable Drivers
- Video Switchers and Routers
- Medical Imaging Systems
- RGB Video Processing
- High Speed Oscilloscopes and Analyzers
| Part Number | Status | Samples | Stock | Package | Lead Count (#) | Carrier Type | Pb (Lead) Free | Temp. Range (°C) |
|---|---|---|---|---|---|---|---|---|
| HFA1412IBZ | Obsolete | N/A | Out of Stock | SOICN | 14# | Tube | No | -40 to +85°C |
Loading
Filters
Applied Filters
Log in required to subscribe
- 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.
- End Of Life NoticePDF 200 KB PLC15033 Jun 11, 2015
- 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 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.
Recommended Documents (1)
Datasheets (1)
No Results Found.
Check Spelling
Make sure all keywords are spelled correctly.
Make sure all keywords are spelled correctly.
Adjust Keywords
Try fewer, different, or more general terms to vary your search.
Try fewer, different, or more general terms to vary your search.
Review Filters
If you have filters applied, consider deselecting some to broaden your results.
If you have filters applied, consider deselecting some to broaden your results.
Need help?
- Search our extensive knowledgebase, designed to help customers with their FAQs.
- Get help from our expert Renesas technical staff and community on our support forums.
- 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.
- 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.View More (7)
Application Notes & White Papers (7)
- End Of Life NoticePDF 200 KB PLC15033 Jun 11, 2015
- Product Change NoticePDF 152 KB PCN12085 Nov 07, 2012
Product Notices (PCN, EOL, etc) (2)
No Results Found.
Check Spelling
Make sure all keywords are spelled correctly.
Make sure all keywords are spelled correctly.
Adjust Keywords
Try fewer, different, or more general terms to vary your search.
Try fewer, different, or more general terms to vary your search.
Review Filters
If you have filters applied, consider deselecting some to broaden your results.
If you have filters applied, consider deselecting some to broaden your results.
Need help?
- Search our extensive knowledgebase, designed to help customers with their FAQs.
- Get help from our expert Renesas technical staff and community on our support forums.
No Results Found.
Check Spelling
Make sure all keywords are spelled correctly.
Make sure all keywords are spelled correctly.
Adjust Keywords
Try fewer, different, or more general terms to vary your search.
Try fewer, different, or more general terms to vary your search.
Review Filters
If you have filters applied, consider deselecting some to broaden your results.
If you have filters applied, consider deselecting some to broaden your results.
Need help?
- Search our extensive knowledgebase, designed to help customers with their FAQs.
- Get help from our expert Renesas technical staff and community on our support forums.
No Results Found.
Check Spelling
Make sure all keywords are spelled correctly.
Make sure all keywords are spelled correctly.
Adjust Keywords
Try fewer, different, or more general terms to vary your search.
Try fewer, different, or more general terms to vary your search.
Review Filters
If you have filters applied, consider deselecting some to broaden your results.
If you have filters applied, consider deselecting some to broaden your results.
Need help?
- Search our extensive knowledgebase, designed to help customers with their FAQs.
- Get help from our expert Renesas technical staff and community on our support forums.
No Results Found.
Check Spelling
Make sure all keywords are spelled correctly.
Make sure all keywords are spelled correctly.
Adjust Keywords
Try fewer, different, or more general terms to vary your search.
Try fewer, different, or more general terms to vary your search.
Review Filters
If you have filters applied, consider deselecting some to broaden your results.
If you have filters applied, consider deselecting some to broaden your results.
Need help?
- Search our extensive knowledgebase, designed to help customers with their FAQs.
- Get help from our expert Renesas technical staff and community on our support forums.
No Results Found.
Check Spelling
Make sure all keywords are spelled correctly.
Make sure all keywords are spelled correctly.
Adjust Keywords
Try fewer, different, or more general terms to vary your search.
Try fewer, different, or more general terms to vary your search.
Review Filters
If you have filters applied, consider deselecting some to broaden your results.
If you have filters applied, consider deselecting some to broaden your results.
Need help?
- Search our extensive knowledgebase, designed to help customers with their FAQs.
- Get help from our expert Renesas technical staff and community on our support forums.
No Results Found.
Check Spelling
Make sure all keywords are spelled correctly.
Make sure all keywords are spelled correctly.
Adjust Keywords
Try fewer, different, or more general terms to vary your search.
Try fewer, different, or more general terms to vary your search.
Review Filters
If you have filters applied, consider deselecting some to broaden your results.
If you have filters applied, consider deselecting some to broaden your results.
Need help?
- Search our extensive knowledgebase, designed to help customers with their FAQs.
- Get help from our expert Renesas technical staff and community on our support forums.
Marketing Collateral (1)
Other (1)
No Results Found.
Check Spelling
Make sure all keywords are spelled correctly.
Make sure all keywords are spelled correctly.
Adjust Keywords
Try fewer, different, or more general terms to vary your search.
Try fewer, different, or more general terms to vary your search.
Review Filters
If you have filters applied, consider deselecting some to broaden your results.
If you have filters applied, consider deselecting some to broaden your results.
Need help?
- Search our extensive knowledgebase, designed to help customers with their FAQs.
- Get help from our expert Renesas technical staff and community on our support forums.
Loading
Filters
Applied Filters
Software & Tools
Filter by Type
Filter by Provider
Sample Code
Filter by Application
Filter by Function
Filter by Compiler
Filter by IDE
Simulation Models
Partner Solutions
No Results Found.
Check Spelling
Make sure all keywords are spelled correctly.
Make sure all keywords are spelled correctly.
Adjust Keywords
Try fewer, different, or more general terms to vary your search.
Try fewer, different, or more general terms to vary your search.
Review Filters
If you have filters applied, consider deselecting some to broaden your results.
If you have filters applied, consider deselecting some to broaden your results.
Need help?
- Search our extensive knowledgebase, designed to help customers with their FAQs.
- Get help from our expert Renesas technical staff and community on our support forums.
No Results Found.
Check Spelling
Make sure all keywords are spelled correctly.
Make sure all keywords are spelled correctly.
Adjust Keywords
Try fewer, different, or more general terms to vary your search.
Try fewer, different, or more general terms to vary your search.
Review Filters
If you have filters applied, consider deselecting some to broaden your results.
If you have filters applied, consider deselecting some to broaden your results.
Need help?
- Search our extensive knowledgebase, designed to help customers with their FAQs.
- Get help from our expert Renesas technical staff and community on our support forums.
No Results Found.
Check Spelling
Make sure all keywords are spelled correctly.
Make sure all keywords are spelled correctly.
Adjust Keywords
Try fewer, different, or more general terms to vary your search.
Try fewer, different, or more general terms to vary your search.
Review Filters
If you have filters applied, consider deselecting some to broaden your results.
If you have filters applied, consider deselecting some to broaden your results.
Need help?
- Search our extensive knowledgebase, designed to help customers with their FAQs.
- Get help from our expert Renesas technical staff and community on our support forums.
Simulation Models (1)
No Results Found.
Check Spelling
Make sure all keywords are spelled correctly.
Make sure all keywords are spelled correctly.
Adjust Keywords
Try fewer, different, or more general terms to vary your search.
Try fewer, different, or more general terms to vary your search.
Review Filters
If you have filters applied, consider deselecting some to broaden your results.
If you have filters applied, consider deselecting some to broaden your results.
Need help?
- Search our extensive knowledgebase, designed to help customers with their FAQs.
- Get help from our expert Renesas technical staff and community on our support forums.
Support Communities
Get quick technical support online from Renesas Engineering Community technical staff.
Knowledge Base
Browse our knowledge base for helpful articles, FAQs, and other useful resources.
