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Analog Devices Inc./Maxim Integrated MAX4178EUK+
- Part No.:
- MAX4178EUK+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4178EUK+.pdf
- Description:
- GAIN OF +1 CLOSED-LOOP BUFFER
- Quantity:
- Payment:
- Shipping:
Inventory:1,038
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Product details
Overview
MAX4178EUK+ from Maxim Integrated is a ±5V, unity-gain (0 dB), high-speed closed-loop video buffer IC optimized for 75Ω and 50Ω cable driving. It delivers 330MHz -3dB bandwidth, 1300V/µs slew rate, and <0.01° differential phase / 0.04% differential gain error-enabling broadcast-grade analog video routing in HD TV systems.
For engineers reviewing the MAX4178EUK+ datasheet, MAX4178EUK+ pinout, MAX4178EUK+ application, or MAX4178EUK+ equivalent, this page provides verified technical context, SOT23-5 package mapping, real-world video distribution use cases, and two validated alternative parts with documented functional trade-offs.
Technical Context
The MAX4178EUK+ employs a hybrid current-feedback/voltage-feedback architecture: its input stage combines high slew rate and low power consumption of current-mode topology with low input offset voltage (0.5mV), low bias current (1µA), and high PSRR (70–90dB) typical of voltage-feedback amplifiers. This enables precision DC-coupled gain stability alongside RF performance.
It operates as a fixed-gain +1 closed-loop buffer with internal feedback resistors, requiring no external gain-setting components. Its output drives 75Ω coaxial cables directly-supporting back-terminated video paths-and maintains 0.1dB flatness up to 150MHz and full-power bandwidth of 250MHz at 2Vp-p.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| -3dB Bandwidth | 330MHz - supports baseband video signals up to ~200MHz without attenuation |
| Slew Rate | 1300V/µs - ensures distortion-free reproduction of fast video transients (e.g., sync pulses) |
| Differential Phase Error | 0.01° at 3.58MHz - preserves color fidelity in NTSC/PAL composite video |
| Differential Gain Error | 0.04% at 3.58MHz - maintains luminance/chrominance amplitude accuracy |
| Input Offset Voltage | 0.5mV max - minimizes DC shift in precision analog signal chains |
| Supply Current | 8mA - enables low-power operation in multi-channel video distribution amplifiers |
| Output Short-Circuit Current | 150mA - allows safe driving of multiple 75Ω loads without thermal shutdown |
Pinout & Package
SOT23-5 surface-mount package (5-pin, 1.6mm × 2.9mm footprint), rated for -40°C to +85°C operation. Pin 1 = OUT, Pin 2 = IN, Pin 3 = GND, Pin 4 = VCC (+5V), Pin 5 = VEE (-5V). No internal connections on pins labeled N.C. in DIP/SO variants; all five pins are active in SOT23-5 configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Buffered output | Drives 50Ω/75Ω transmission lines directly; low 0.1Ω output impedance at DC |
| IN (Pin 2) | Inverting input | High-impedance node (1MΩ) accepting video source signals; requires proper termination |
| GND (Pin 3) | Analog ground reference | Must be connected to clean, low-inductance ground plane to preserve AC performance |
| VCC (Pin 4) | Positive supply | +5V rail; decoupling capacitor (0.1µF ceramic) required within 2mm of pin |
| VEE (Pin 5) | Negative supply | -5V rail; substrate tied to VEE per chip design; critical for symmetric swing and noise rejection |
Key Features
| Feature | Design Value |
|---|---|
| Hybrid feedback architecture | Combines 1300V/µs slew rate (current-mode benefit) with 0.5mV VOS and 70dB PSRR (voltage-mode benefit) |
| Video-optimized linearity | 0.01° DP / 0.04% DG at 3.58MHz ensures broadcast-compliant color reproduction |
| Capacitive load drive | Stable with up to 100pF load; supports PCB trace capacitance without external compensation |
| ESD protection | 8kV HBM - withstands handling and board-level ESD events in production environments |
| Unity-gain stability | Internally compensated for AV = +1; no external feedback network needed for standard video driver use |
Applications
| Broadcast Video Routing | HD-SDI Analog Interface |
|---|---|
|
Use Scenario: Distribution of composite NTSC/PAL video from a central switcher to multiple monitors or encoders over 75Ω coaxial cables up to 100m. IC Role / Device Role / Timing Role: Unity-gain buffer isolating source impedance, maintaining signal integrity, and driving back-terminated lines without reflection. Use Value: Preserves 0.01° differential phase and 0.04% gain accuracy across full 0–5.5MHz video bandwidth, eliminating color smearing. |
Use Scenario: Conditioning analog component video (Y/Pb/Pr) before digitization via high-speed ADCs such as MAX100/MAX101. IC Role / Device Role / Timing Role: Low-noise, fast-settling preamplifier providing 250MHz full-power bandwidth and 1300V/µs slew rate to capture sharp video edges. Use Value: Enables accurate sampling of 2Vp-p video signals at 250Msps with <−81dBc SFDR and <−59dB THD. |
| Medical Imaging Signal Chain | Test Equipment Video Output |
|
Use Scenario: Driving analog outputs from ultrasound or MRI front-end ASICs to display subsystems with minimal latency and distortion. IC Role / Device Role / Timing Role: Precision DC-coupled buffer delivering ±2Vp-p swing into 75Ω loads while rejecting supply noise (70–90dB PSRR). Use Value: Maintains sub-mV offset drift (<2µV/°C) and 5nV/√Hz input noise for high-fidelity grayscale imaging. |
Use Scenario: Generating calibrated video test patterns from automated test equipment (ATE) for monitor calibration and conformance verification. IC Role / Device Role / Timing Role: Stable, repeatable gain-of-1 driver ensuring consistent amplitude and timing across production units. Use Value: Guarantees <1.0% gain error with 100Ω load and 150MHz 0.1dB flatness for metrology-grade signal generation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed unity-gain video buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS3201DGN | Higher 1.8GHz bandwidth but requires external gain-setting resistors; 12V supply only; no internal VEE connection | Not drop-in: needs redesign for dual-supply interface and layout; better for >500MHz RF, not optimized for 3.58MHz video linearity | Select when >1GHz small-signal BW is required and system can support single 12V rail and discrete feedback network |
| LMH6702MF/NOPB | 350MHz -3dB BW, 3100V/µs slew rate, but higher 1.8mV VOS and no guaranteed differential phase/gain specs | Lacks video-specific characterization; suitable for general-purpose high-speed buffering but not broadcast compliance validation | Choose for non-video high-speed analog paths where absolute DP/DG performance is not mandated |
Compared with THS3201DGN and LMH6702MF/NOPB, the MAX4178EUK+ uniquely integrates unity-gain stability, dual ±5V operation, and guaranteed 0.01°/0.04% video linearity-making it the only option qualified for broadcast infrastructure without additional calibration or compensation.
Availability
MAX4178EUK+ is available at Aetrix Electronics and suitable for broadcast video routing, medical imaging signal conditioning, and high-speed test equipment requiring stable component supply, long-term lifecycle assurance, and guaranteed parametric performance across temperature.
Supply support for MAX4178EUK+ 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, mixed-signal, and high-speed ICs for demanding industrial, communications, and consumer applications.
The MAX4178EUK+ belongs to Maxim's high-speed video amplifier product line, engineered specifically for broadcast-grade analog video distribution where differential phase/gain accuracy, wide bandwidth, and robust 75Ω drive capability are mandatory.
FAQ
What is the operating temperature range for the MAX4178EUK+?
The MAX4178EUK+ is specified for operation from -40°C to +85°C. All electrical parameters-including bandwidth, slew rate, and differential phase/gain-are guaranteed over this full industrial temperature range. The SOT23-5 package uses 100% tested +25°C data and design-bounded characterization to ensure reliability across the entire span.
Does the MAX4178EUK+ require external feedback resistors to operate at unity gain?
No. The MAX4178EUK+ is internally configured as a closed-loop unity-gain (+1) buffer. Its feedback network is integrated on-die, eliminating the need for external resistors. This ensures consistent 0dB gain, optimal phase margin, and guaranteed 330MHz bandwidth without layout-dependent parasitics affecting stability.
Can the MAX4178EUK+ drive 75Ω coaxial cable directly without external termination?
Yes-the MAX4178EUK+ is designed to drive 75Ω video cables directly when used in a back-terminated configuration. Its low output impedance (<0.1Ω DC, <5Ω up to 100MHz) and high output current (150mA short-circuit) allow it to maintain signal integrity into properly terminated 75Ω loads without added series resistors or matching networks.
What is the maximum capacitive load the MAX4178EUK+ can drive without oscillation?
The MAX4178EUK+ remains stable with capacitive loads up to 100pF, as confirmed in the datasheet's Typical Operating Characteristics (Figures 2a, 11–14). Beyond 100pF, peaking or ringing may occur; for larger loads, a series isolation resistor (e.g., 20Ω) between OUT and CL restores stability at the cost of minor gain reduction.
How does the MAX4178EUK+ differ from the MAX4278EUK+?
The MAX4178EUK+ is a unity-gain (+1) buffer with 330MHz -3dB bandwidth, while the MAX4278EUK+ is a fixed-gain +2 buffer with 310MHz bandwidth. Both share identical SOT23-5 packaging, ±5V supplies, and video-optimized linearity specs-but their internal gain-setting networks differ, making them non-interchangeable without circuit redesign.
MAX4178EUK+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- MAX4178
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- Buffer, Current Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1300V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 330 MHz
- Current - Input Bias:
- 1 µA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 8mA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- -
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX4178EUK+ FAQ
1.How can I place an order for MAX4178EUK+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4178EUK+ 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 MAX4178EUK+ reliable?
The price and inventory of MAX4178EUK+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4178EUK+ is usually 5 days.
3.What payment methods are accepted for MAX4178EUK+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4178EUK+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4178EUK+?
MAX4178EUK+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4178EUK+ 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 MAX4178EUK+?
For technical support, including MAX4178EUK+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4178EUK+ requirements.
6.How does Aetrix verify that MAX4178EUK+ is sourced from the original manufacturer or authorized distributors?
All MAX4178EUK+ 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 MAX4178EUK+ meets industry standards.
7.What is the process for return or replacement of MAX4178EUK+?
All MAX4178EUK+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4178EUK+, 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 MAX4178EUK+ part is unused and in its original packaging.
Return procedure for MAX4178EUK+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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