Video Amplifiers Integrated Circuit
A Video Amplifier IC is a specialized operational amplifier (op-amp) tailored for video signal processing. Video signals carry dense image data at high frequencies, requiring extreme signal integrity and real-time performance. Standard op-amps often fail these requirements. These ICs are essential for voltage gain, impedance matching, filtering, and driving signals over long distances without distortion.
IC-Mart Your Trusted Source for Video Amplifiers IC Chips
(from leading manufacturers)
Mainstream Models and Manufacturers
1. Texas Instruments (TI)
TI offers the most comprehensive portfolio, led by the THS (High-Speed) and LMH (High-Performance/Broadcast) series.
- Video Reconstruction Filters: * THS7314 / THS7316: Standard 3-channel SDTV/HDTV filters for Set-Top Box (STB) outputs.
- THS7374: 4-channel high-speed amplifier with integrated low-pass filters; supports 1080p.
- Wideband Op-Amps: * OPA690: A classic high-speed voltage feedback amplifier.
- LMH6702: 1.7GHz ultra-wideband, low-distortion amplifier for medical imaging and radar.
- Differential Drivers: * THS4131: Fully differential amplifier with superior noise immunity.
2. Analog Devices (ADI)
By acquiring Linear Technology and Maxim Integrated, ADI now dominates high-end analog signal processing and professional video conversion.
- Professional Drivers & Filters: * AD8001: An industry-standard 800MHz high-speed op-amp with ultra-low power consumption.
- ADA4432-1: Single-channel filter for surveillance cameras with short-circuit protection.
- MAX9502: Ultra-small, low-power video amplifier (formerly Maxim).
- Differential & Cable Transmission: * AD8132 / AD8138: Essential differential drivers for twisted-pair video transmission.
- AD8122: Triple differential receiver supporting cable compensation up to 300 meters.
- Crosspoint Switches: * AD8113: 16×16 high-performance video crosspoint switch.
3. Renesas (formerly Intersil)
Renesas maintains the EL series, which is highly regarded for long-distance transmission and display distribution.
- Distribution Amps: * EL8108: Dual-channel driver with high output current (450mA).
- EL5166: 1.4GHz current feedback amplifier for high-speed cable driving.
- Differential Solutions: * EL5172: 250MHz differential video receiver/driver.
- Video Multiplexing: * EL5211: High-speed op-amp with integrated mux functionality.
4. Nisshinbo Micro Devices (formerly NJR)
NJR is a staple in consumer electronics (AV receivers, automotive infotainment) due to its cost-efficiency and integration.
- Integrated Drivers: * NJM2561: Low-voltage (2.8V-5.5V) amplifier with integrated LPF for portable devices.
- NJM2573: 3-channel driver with LPF for component video.
- Video Switches: * NJM2244: Traditional 3-in/1-out switch for legacy automotive systems.
- NJW1321: Multi-channel selector for AV receivers (AVR).
5. ONsemi
ONsemi focuses on industrial standards and low-power filters.
- Key Models: * FMS6141: Highly competitive single-channel filter.
- FMS6363: 3-channel reconstruction filter supporting 1080p HD.
- FMS6400: Integrated driver/filter for legacy analog display interfaces.
Core Technical Features for Video Amplifier IC
- Ultra-Wide Bandwidth: Standard video amps offer 50MHz to 1.5GHz bandwidth. This prevents phase shifts and signal attenuation across SD, HD, and 4K/8K resolutions.
- High Slew Rate: Essential for sharp image edges and transitions. Typical rates range from 500 V/μs to over 2000 V/μs.
- 75Ω Load Drive: Specifically optimized to drive 75Ω coaxial cables without signal reflection or overheating.
Typical Application Scenarios
- Surveillance (CCTV): Compensates for signal loss over long coaxial cables in analog (CVBS/AHD) systems.
- Consumer Electronics: Integrated into STBs and DVD players as Reconstruction Filters to remove DAC digital noise.
- Automotive: Ensures interference-free video for rear-view cameras and 360-degree surround views.
- Professional AV: Acts as buffers and distributors in broadcast studios and large-scale video matrices.
- Medical & Industrial: Handles high-frequency signals for endoscopes, CT/MRI monitors, and machine vision.
- Differential Transmission: Enables video transmission over distances exceeding 1km using Cat5/6 cables instead of coax.
Classification of Video Amplifier ICs
| Category | Key Logic & Position | Core Metric | Typical Models |
| Reconstruction Filters | Post-DAC; removes aliasing noise. | Cut-off Frequency | THS7314, ADA4432-1, FMS6141 |
| Cable Drivers | End of signal chain; drives 75Ω loads. | Output Current | LT1206, EL5166, THS3001 |
| Differential Amps | Balanced transmission over twisted pair. | CMRR (Noise Rejection) | AD8132, THS4131, EL5172 |
| Mux & Matrix Switches | Multi-channel signal switching. | Isolation | MAX4313, AD8113, NJM2244 |
| Ultra-High Bandwidth | Extreme performance for 4K/8K and Radar. | Bandwidth (GHz) | AD8001, OPA690, LMH6702 |