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Analog Devices Inc./Maxim Integrated MAX4278EUK+T
- Part No.:
- MAX4278EUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4278EUK+T.pdf
- Description:
- IC BUFFER 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,870
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Product details
Overview
MAX4278EUK+T from Maxim Integrated is a +2 voltage-gain (6dB), ±5V dual-supply, high-speed closed-loop 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 with minimal signal degradation.
For engineers reviewing the MAX4278EUK+T datasheet, MAX4278EUK+T pinout, MAX4278EUK+T application, or MAX4278EUK+T equivalent, this page provides verified technical context, real-world design meaning for key specs, SOT23-5 package layout, video-system-specific applications, and two validated alternative parts - all grounded in the official MAX4278 datasheet Rev 2 (11/99).
Technical Context
The MAX4278EUK+T uses a hybrid current-feedback/voltage-feedback architecture: its input stage combines high slew rate and low power (current-mode traits) with low input offset voltage (0.5mV), low bias current (1µA), and high PSRR (70–90dB) - characteristics typical of precision voltage-feedback amplifiers. This enables stable gain accuracy (±1.0% max with 100Ω load) without sacrificing speed.
It operates from ±4.5V to ±5.5V supplies, drives 50Ω or 75Ω loads directly, and maintains 150MHz 0.1dB flatness bandwidth and 250MHz full-power bandwidth (2Vp-p). Short-circuit protection limits output current to 150mA, and 8000V HBM ESD rating supports robust board-level handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| -3dB Bandwidth | 310MHz - supports HD video baseband signals up to ~155MHz Nyquist without attenuation. |
| Voltage Gain | +2 (6dB) - fixed closed-loop gain eliminates external feedback resistor selection and layout sensitivity. |
| Slew Rate | 1600V/µs - ensures <12ns settling to 0.1% for 2V step, critical for fast video transitions and sync pulses. |
| Differential Phase/Gain Error | 0.01° / 0.04% - preserves color fidelity in composite/S-video systems compliant with NTSC/PAL standards. |
| Input Offset Voltage | 0.5mV max - minimizes DC shift in cascaded video stages, reducing need for AC coupling or trimming. |
| Supply Current | 8mA - enables multi-channel video distribution without excessive thermal load in space-constrained SOT23-5 layouts. |
| Output Short-Circuit Current | 150mA - safely drives multiple back-terminated 75Ω cables (up to six ±2Vp-p loads at +25°C). |
Pinout & Package
SOT23-5 surface-mount package (5-pin, 1.6mm × 2.9mm footprint), rated for -40°C to +85°C operation. Pin 1 marked by dot; pin 1–5 arranged left-to-right on top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - drives 75Ω coaxial cable directly; requires no series termination when back-terminated. |
| 2 | IN | Inverting input - accepts single-ended video source; noninverting input internally tied for fixed +2 gain. |
| 3 | GND | Analog ground reference - must connect to low-impedance ground plane to maintain 310MHz bandwidth and low noise. |
| 4 | VEE | Negative supply (–5V) - substrate tied to VEE per chip info; decoupling capacitor required within 5mm. |
| 5 | VCC | Positive supply (+5V) - powers internal current mirrors; separate 0.1µF ceramic bypass per supply pin essential. |
Key Features
| Feature | Design Value |
|---|---|
| Hybrid feedback topology | Combines 1600V/µs slew rate (current-mode) with 0.5mV VOS and 90dB PSRR (voltage-mode) - eliminates trade-off between speed and DC precision. |
| 75Ω video optimization | Specified differential gain/phase error (0.04%/0.01°) and 150MHz 0.1dB flatness ensure broadcast-compliant signal integrity over coax. |
| Capacitive load drive | Stable with up to 100pF load - supports PCB trace capacitance and connector parasitics without isolation resistors in most routing scenarios. |
| Short-circuit protected output | 150mA current limit prevents latch-up or damage during hot-plug or cable fault conditions - enables field-replaceable video modules. |
| 8000V HBM ESD rating | Withstands handling and board assembly without special precautions - reduces yield loss in automated SMT lines. |
Applications
| Broadcast Video Routing | HD Video Switcher Output Stage |
|---|---|
Use Scenario: Distribution of composite or component video from master control room to multiple monitors and recorders via 75Ω coaxial cables. IC Role / Device Role / Timing Role: Fixed-gain +2 buffer isolating switching matrix output while driving six parallel 75Ω terminated lines. Use Value: Maintains 0.01° differential phase error across 3.58MHz color subcarrier - prevents hue shifts and color bleeding in NTSC/PAL feeds. |
Use Scenario: Final output amplification in a 12×12 SDI-embedded or analog video router with hot-swap capability. IC Role / Device Role / Timing Role: High-current driver ensuring 2Vp-p signal integrity into back-terminated 75Ω outputs with <12ns edge fidelity. Use Value: 310MHz bandwidth and 1600V/µs slew rate preserve rise/fall times of sync pulses and active video edges - eliminating timing jitter in genlock-sensitive systems. |
| Medical Endoscopy Imaging | Test Equipment Video Signal Generator |
Use Scenario: Amplifying high-resolution RGB video from CMOS image sensor in rigid endoscope before transmission over miniature coaxial harness. IC Role / Device Role / Timing Role: Low-noise (5nV/√Hz), low-distortion (+2 gain) buffer minimizing SNR degradation in 1080p60 analog video path. Use Value: 0.04% differential gain error prevents luminance nonlinearity that would obscure subtle tissue contrast in diagnostic displays. |
Use Scenario: Output stage of benchtop video pattern generator producing SMPTE color bars, multiburst, and sweep signals. IC Role / Device Role / Timing Role: Precision gain-setting element delivering calibrated 1Vp-p or 2Vp-p levels into 75Ω measurement equipment inputs. Use Value: ±1.0% max gain error with 100Ω load ensures traceable amplitude accuracy - critical for calibration-grade signal sources. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed video buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4278ESA+ | 8-pin SO package; identical electrical specs but larger footprint and higher thermal resistance (5.88mW/°C derating). | Preferred for prototyping or lower-frequency designs where manual soldering or socket use is acceptable. | Select MAX4278ESA+ only if SOT23-5 assembly capability is unavailable; MAX4278EUK+T offers superior high-frequency layout control. |
| THS3202D | Single-channel, +2 gain, 440MHz bandwidth, 3000V/µs slew rate; requires external gain-setting resistors and ±15V supplies. | Used in wideband instrumentation where higher bandwidth justifies complex supply and layout overhead. | Choose THS3202D only when >310MHz bandwidth is mandatory; MAX4278EUK+T provides simpler, more integrated 75Ω video solution. |
Compared with MAX4278ESA+, the MAX4278EUK+T saves board area and improves RF stability via shorter bond wires and tighter parasitic control; compared with THS3202D, it eliminates external resistor networks and dual ±15V rails - reducing BOM count and power conversion complexity in broadcast infrastructure.
Availability
MAX4278EUK+T is available at Aetrix Electronics and suitable for broadcast video routing, HD video switcher output stages, medical endoscopy imaging, and test equipment video signal generation requiring stable component supply across industrial temperature ranges.
Supply support for MAX4278EUK+T 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) designs precision analog and mixed-signal ICs for demanding performance applications, with emphasis on signal integrity, power efficiency, and reliability.
The MAX4278EUK+T belongs to Maxim's high-speed video amplifier product line, engineered specifically for broadcast, medical imaging, and test equipment where differential phase/gain accuracy and 75Ω drive capability are non-negotiable.
FAQ
What is the operating temperature range for the MAX4278EUK+T?
The MAX4278EUK+T is specified for operation from -40°C to +85°C. All electrical parameters in the datasheet are guaranteed over this range for the SOT23-5 package, with 100% testing performed at +25°C and design-based assurance across the full span. This makes the MAX4278EUK+T suitable for industrial video enclosures and broadcast equipment deployed in uncontrolled environments.
Does the MAX4278EUK+T require external gain-setting resistors?
No. The MAX4278EUK+T is a fully integrated, closed-loop buffer preset for a precise +2 voltage gain (6dB). Its internal feedback network eliminates the need for external resistors, reducing layout sensitivity, component count, and gain drift due to resistor tolerance or temperature coefficient - a key advantage over general-purpose op-amps used in video applications.
Can the MAX4278EUK+T drive multiple 75Ω cables simultaneously?
Yes. The MAX4278EUK+T can drive up to six parallel back-terminated 75Ω coaxial cables delivering ±2Vp-p signals at +25°C, thanks to its 150mA short-circuit output current limit and low 0.1Ω typical output impedance. For higher channel counts or wider temperature operation, output current derating must be applied per the datasheet's thermal curves.
What is the maximum capacitive load the MAX4278EUK+T can drive without oscillation?
The MAX4278EUK+T remains stable with capacitive loads up to 100pF without external compensation. This accommodates typical PCB trace capacitance, connector parasitics, and stubs in video routing layouts. Beyond 100pF, ringing or peaking may occur; an isolation resistor (e.g., 20Ω) between OUT and the load restores stability at the cost of minor gain reduction.
How does the MAX4278EUK+T achieve low differential phase and gain error?
The MAX4278EUK+T achieves 0.01° differential phase and 0.04% differential gain error through its hybrid feedback architecture - combining current-mode speed with voltage-mode DC precision - plus laser-trimmed internal resistors and matched transistor pairs. These features minimize nonlinearities across the 3.58MHz color subcarrier frequency critical for NTSC/PAL compatibility, as verified in the datasheet's Figure 19 and 20.
MAX4278EUK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- 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:
- SOT-23-5
MAX4278EUK+T FAQ
1.How can I place an order for MAX4278EUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4278EUK+T 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 MAX4278EUK+T reliable?
The price and inventory of MAX4278EUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4278EUK+T is usually 5 days.
3.What payment methods are accepted for MAX4278EUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4278EUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4278EUK+T?
MAX4278EUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4278EUK+T 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 MAX4278EUK+T?
For technical support, including MAX4278EUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4278EUK+T requirements.
6.How does Aetrix verify that MAX4278EUK+T is sourced from the original manufacturer or authorized distributors?
All MAX4278EUK+T 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 MAX4278EUK+T meets industry standards.
7.What is the process for return or replacement of MAX4278EUK+T?
All MAX4278EUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4278EUK+T, 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 MAX4278EUK+T part is unused and in its original packaging.
Return procedure for MAX4278EUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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