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Analog Devices Inc./Maxim Integrated MAX4278EUA+
- Part No.:
- MAX4278EUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4278EUA+.pdf
- Description:
- IC BUFFER 1 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,709
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Product details
Overview
MAX4278EUA+ from Maxim Integrated is a +2-gain, ±5V, high-speed closed-loop video buffer IC optimized for 75Ω video cable driving. It delivers 310MHz -3dB bandwidth, 1600V/µs slew rate, and <0.01°/0.04% differential phase/gain error - enabling broadcast-grade analog video routing in HD TV systems and video switchers.
For engineers reviewing the MAX4278EUA+ datasheet, MAX4278EUA+ pinout, MAX4278EUA+ application, or MAX4278EUA+ equivalent, this page provides verified technical context, real-world design meaning of key specs, µMAX-8 package terminal mapping, low-noise video driver use cases, and two validated alternative parts with functional trade-offs.
Technical Context
The MAX4278EUA+ uses a hybrid current-feedback/voltage-feedback architecture to achieve both high slew rate (1600V/µs) and precision characteristics (0.5mV VOS, 1µA IB), unlike conventional current-feedback amplifiers. Its fixed +2 gain (6dB) is internally configured - no external resistors required.
It operates from dual ±5V supplies, drives 50Ω or 75Ω loads directly, and maintains 0.1dB flatness to 150MHz. The device includes short-circuit protection (150mA typical limit) and 8000V HBM ESD rating, making it robust for field-deployed video infrastructure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| -3dB Bandwidth | 310MHz - supports full NTSC/PAL/HD-SDI baseband video signal integrity without attenuation. |
| Slew Rate | 1600V/µs - ensures distortion-free reproduction of fast video transients (e.g., sync pulses, edge transitions). |
| Differential Phase Error | 0.01° at 3.58MHz - preserves color fidelity in composite video systems. |
| Differential Gain Error | 0.04% at 3.58MHz - maintains consistent luminance/chrominance amplitude relationships. |
| Input Offset Voltage | 0.5mV max - minimizes DC shift in multi-stage video chains requiring precise black-level alignment. |
| Supply Current | 8mA - enables low-power, multi-channel video distribution amplifier designs. |
| Output Short-Circuit Current | 150mA typical - allows safe drive of multiple parallel 75Ω cables without latch-up or damage. |
Pinout & Package
MAX4278EUA+ is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), pin-compatible with SO and PDIP variants. This space-saving package supports high-density PCB layouts for multi-channel video routing boards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 8 | No Connection | Unused pins - must be left floating; no internal connection or function. |
| 2 | IN | Inverting input - accepts single-ended video signal; high-impedance (1MΩ) for minimal loading. |
| 3 | GND | Analog ground reference - requires low-inductance connection to solid ground plane for noise immunity. |
| 4 | OUT | Buffered output - drives 75Ω coaxial cable directly; low output impedance (<0.1Ω) ensures minimal signal reflection. |
| 6 | VCC | Positive supply - connect to +5V with local 0.1µF ceramic bypass capacitor near pin. |
| 7 | VEE | Negative supply - connect to -5V with local 0.1µF ceramic bypass capacitor near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Hybrid feedback topology | Combines current-mode speed (1600V/µs) with voltage-mode precision (0.5mV VOS, 70dB PSRR). |
| Fixed +2 gain configuration | Eliminates external resistor network - reduces layout sensitivity, component count, and gain drift. |
| 75Ω video load compatibility | Optimized output stage delivers ±2Vp-p into 75Ω with <0.04% DG/0.01° DP - meets SMPTE 253M spec. |
| Capacitive load drive capability | Stable with up to 100pF load - supports back-terminated cables and moderate trace capacitance without isolation resistor. |
| ESD robustness | 8000V HBM rating - withstands handling and field installation in broadcast equipment environments. |
Applications
| Broadcast Video Routing | HD-SDI Signal Distribution |
|---|---|
Use Scenario: Distributing composite video from a master source to multiple monitors or recording devices in studio control rooms. IC Role / Device Role / Timing Role: Closed-loop +2 gain buffer driving six parallel 75Ω coaxial cables with back-termination. Use Value: Maintains <0.04% differential gain error across 0–5.5MHz, preserving color saturation and contrast over long cable runs. |
Use Scenario: Conditioning analog component video (Y/Pb/Pr) before digitization in HD-SDI encoder front-ends. IC Role / Device Role / Timing Role: High-fidelity unity-gain or +2 gain buffer isolating ADC inputs from source impedance variations. Use Value: 250MHz full-power bandwidth ensures accurate capture of 1080p/60 video edges without slew-induced distortion. |
| Medical Imaging Display | Video Switcher Output Stage |
Use Scenario: Driving high-resolution analog video outputs from MRI/CT console systems to diagnostic displays. IC Role / Device Role / Timing Role: Precision video buffer ensuring DC-coupled black-level stability and sub-degree phase accuracy. Use Value: 0.5mV input offset and <0.01° differential phase enable pixel-perfect grayscale and color registration on clinical monitors. |
Use Scenario: Final-stage amplification in professional broadcast video switchers handling 10+ input sources. IC Role / Device Role / Timing Role: Fast-settling (+2V step in 12ns) output driver enabling glitch-free transitions between video sources. Use Value: 1300–1600V/µs slew rate eliminates visible artifacts during frame-accurate switching in live production. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar video buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS3201DR | Higher 1.8GHz bandwidth but requires external gain-setting resistors; ±15V supply only; no fixed +2 option. | Better for wideband RF or test equipment; less suitable for drop-in 75Ω video replacement due to supply and layout constraints. | Choose THS3201DR only when >1GHz bandwidth or programmable gain is required - not for direct MAX4278EUA+ substitution. |
| LMH6720MF/NOPB | 350MHz bandwidth, +2 gain available via external resistors; higher 12mA quiescent current; no integrated 75Ω drive optimization. | Acceptable for general-purpose high-speed buffering but lacks guaranteed differential gain/phase specs for broadcast video. | Use LMH6720MF/NOPB where cost is critical and video fidelity specs are relaxed - verify DG/DP performance per board layout. |
Compared with THS3201DR and LMH6720MF/NOPB, the MAX4278EUA+ uniquely delivers factory-trimmed +2 gain, guaranteed 0.04%/0.01° video linearity, and µMAX-8 footprint compatibility - reducing validation effort and PCB area in broadcast-qualified designs.
Availability
MAX4278EUA+ is available at Aetrix Electronics and suitable for broadcast video routing, HD-SDI signal distribution, and medical imaging display applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX4278EUA+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding signal-chain applications.
The MAX4278EUA+ belongs to Maxim's high-speed video buffer product line, designed specifically for broadcast, medical, and professional video equipment requiring precision gain, ultra-low distortion, and robust 75Ω drive capability.
FAQ
What is the operating temperature range for MAX4278EUA+?
The MAX4278EUA+ is rated for operation from -40°C to +85°C. This industrial temperature range ensures reliable performance in broadcast equipment racks, medical imaging consoles, and video switcher chassis where ambient temperatures may fluctuate significantly during extended operation. All electrical specifications in the datasheet are guaranteed across this full range.
Does MAX4278EUA+ require external gain-setting resistors?
No, the MAX4278EUA+ features an internally configured +2 voltage gain (6dB) - no external resistors are needed. This fixed-gain architecture eliminates resistor tolerance errors, thermal drift, and PCB layout sensitivity, making it ideal for production video systems where gain stability and repeatability are critical. The MAX4278EUA+ is distinct from the MAX4178EUA+, which is preset for unity gain.
Can MAX4278EUA+ drive multiple 75Ω coaxial cables simultaneously?
Yes, the MAX4278EUA+ can drive up to six parallel 75Ω back-terminated coaxial cables at ±2Vp-p output level under +25°C conditions. Its high output current (150mA short-circuit limit) and low output impedance (<0.1Ω) ensure minimal signal degradation. At reduced output swing (±1Vp-p), up to twelve 75Ω loads are supported - enabling compact multi-output video distribution amplifiers.
What is the recommended power supply bypassing for MAX4278EUA+?
For optimal high-frequency performance, place a 0.1µF ceramic capacitor between each supply pin (VCC and VEE) and the nearest ground point on the PCB - with leads shorter than 2mm. A second 4.7µF tantalum or ceramic capacitor should be placed near the power entry point. Avoid IC sockets or wire-wrap; use microstrip routing and a solid ground plane to preserve the MAX4278EUA+'s 310MHz bandwidth and low noise floor.
Is MAX4278EUA+ pin-compatible with other packages in the MAX4278 family?
Yes, the MAX4278EUA+ (µMAX-8) shares identical pinout and functionality with the MAX4278ESA (SO-8) and MAX4278EPA (PDIP-8). Pin 1, 5, and 8 are N.C.; Pin 2 = IN; Pin 3 = GND; Pin 4 = OUT; Pin 6 = VCC; Pin 7 = VEE. This allows direct footprint interchangeability across package types during prototyping or volume manufacturing - simplifying BOM consolidation and design reuse.
MAX4278EUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Buffer
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1600V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 310 MHz
- Current - Input Bias:
- 1 µA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 8mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- -
- Voltage - Supply Span (Max):
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX4278EUA+ FAQ
1.How can I place an order for MAX4278EUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4278EUA+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX4278EUA+ reliable?
The price and inventory of MAX4278EUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4278EUA+ is usually 5 days.
3.What payment methods are accepted for MAX4278EUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4278EUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4278EUA+?
MAX4278EUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4278EUA+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX4278EUA+?
For technical support, including MAX4278EUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4278EUA+ requirements.
6.How does Aetrix verify that MAX4278EUA+ is sourced from the original manufacturer or authorized distributors?
All MAX4278EUA+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX4278EUA+ meets industry standards.
7.What is the process for return or replacement of MAX4278EUA+?
All MAX4278EUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4278EUA+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX4278EUA+ part is unused and in its original packaging.
Return procedure for MAX4278EUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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