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Analog Devices Inc./Maxim Integrated MAX4351EKA
- Part No.:
- MAX4351EKA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8
- Datasheet:
-
MAX4351EKA.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,242
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Product details
Overview
MAX4351EKA from Maxim Integrated is a dual, unity-gain-stable, rail-to-rail output operational amplifier optimized for high-speed video and instrumentation signal conditioning. It operates from ±5V dual supplies, delivers 210MHz -3dB bandwidth, 485V/µs slew rate, and achieves 0.02% differential gain / 0.08° differential phase error into 150Ω loads - making it ideal for NTSC-compliant video line driving and ADC interface buffering.
For engineers reviewing the MAX4351EKA datasheet, MAX4351EKA pinout, MAX4351EKA application, or MAX4351EKA equivalent, key selection criteria include its dual-channel SOT23-8 package, ±4.5V to ±5.5V supply range, rail-to-rail output swing within 125mV of rails, and verified performance in 75Ω/150Ω video termination topologies.
Technical Context
The MAX4351EKA employs a voltage-feedback architecture enhanced with current-feedback techniques to achieve wide bandwidth and fast settling (16ns to 0.1%). Its input stage supports common-mode voltages from VEE to (VCC − 2.25V), enabling ground-sensing operation in single-supply configurations.
Each amplifier channel features low open-loop output impedance (8Ω), 10nV/√Hz input voltage noise, and 1.8pA/√Hz input current noise. Channel-to-channel isolation exceeds 102dB at DC, confirming robust crosstalk suppression in dual-channel operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| -3dB Bandwidth | 210MHz small-signal - enables full HD video (1080p60) baseband amplification without attenuation |
| Slew Rate | 485V/µs - supports clean 2V-step transitions in ≤16ns, critical for fast pulse fidelity |
| Output Swing | Rails ±125mV @ 2kΩ - delivers >9.75Vpp dynamic range from ±5V supplies |
| Differential Gain/Phase | 0.02%/0.08° @ NTSC, 150Ω - meets broadcast-grade video fidelity requirements |
| Supply Current | 6.9mA per amplifier - enables dual-channel high-speed operation under 14mA total quiescent load |
| Input Common-Mode Range | VEE to (VCC − 2.25V) - allows direct interfacing with ground-referenced sensors or DAC outputs |
| Channel Isolation | 102dB at DC - prevents signal coupling between channels in multi-channel video routing |
Pinout & Package
MAX4351EKA is housed in an 8-pin SOT23 package (JEDEC MO-178 compliant), measuring 3.00mm × 1.75mm × 1.30mm with 0.65mm pitch. The package supports reflow soldering and provides thermal resistance θJA ≈ 190°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Amplifier A Output | Low-impedance rail-to-rail output capable of sourcing/sinking ≥55mA into 50Ω |
| 2 (VEE) | Negative Power Supply | Reference for dual-supply operation; supports ground connection in single-supply mode |
| 3 (INA−) | Amplifier A Inverting Input | Differential input node with 70kΩ differential and 3MΩ common-mode input resistance |
| 4 (INA+) | Amplifier A Noninverting Input | High-impedance input accepting common-mode voltages down to VEE |
| 5 (VCC) | Positive Power Supply | +5V nominal supply pin; absolute max +5.3V, min +4.5V per operating spec |
| 6 (INB−) | Amplifier B Inverting Input | Independent second channel input with matched offset voltage (≤1mV vs. INA−) |
| 7 (INB+) | Amplifier B Noninverting Input | Second channel noninverting input, electrically identical to INA+ |
| 8 (OUTB) | Amplifier B Output | Fully independent output with same AC/DC specs as OUTA; no shared internal nodes |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Swings within 125mV of ±5V rails into 2kΩ, preserving >97% of available voltage headroom |
| Unity-gain stability | No external compensation required; stable at AVCL = +1V/V with 24Ω feedback resistor |
| Video-optimized distortion performance | −65dBc SFDR and −63dB THD at 5MHz ensure minimal color bleeding and luminance artifacts |
| Low capacitive-load sensitivity | Stable with ≤68pF load when isolated by 27Ω series resistor - simplifies PCB layout for coaxial drivers |
| Ground-sensing input architecture | Accepts inputs down to VEE (−5V) while maintaining CMRR >70dB across full common-mode range |
Applications
| Surveillance Video Systems | Video Line Drivers |
|---|---|
|
Use Scenario: Amplifying composite video signals from analog CCTV cameras over 75Ω coaxial cable to DVR inputs. IC Role / Device Role / Timing Role: Dual-channel buffer and driver, with one channel handling luminance (Y) and the other chrominance (C) in Y/C separation architectures. Use Value: 0.02%/0.08° differential gain/phase error preserves color fidelity over long cable runs; rail-to-rail output drives back-terminated 75Ω lines without clipping. |
Use Scenario: Driving 75Ω transmission lines in set-top box video output stages (CVBS, S-video). IC Role / Device Role / Timing Role: Unity-gain line driver with 24Ω series feedback resistor optimizing transient response and flatness to 55MHz. Use Value: 210MHz bandwidth and 485V/µs slew rate prevent edge ringing on sharp sync pulses; low 10nV/√Hz noise avoids snow in dark video regions. |
| Analog-to-Digital Converter Interface | Video Routing and Switching Systems |
|
Use Scenario: Buffering high-resolution video signals (e.g., 10-bit 40MSPS RGB) before sampling by high-speed ADCs. IC Role / Device Role / Timing Role: Low-noise, low-distortion gain-of-one driver isolating source impedance from ADC input capacitance. Use Value: 16ns 0.1% settling time ensures accurate sampling of fast video edges; 102dB channel isolation prevents crosstalk between RGB channels. |
Use Scenario: Signal distribution in matrix switchers routing multiple SD/HD video sources to displays or recorders. IC Role / Device Role / Timing Role: Dual-channel fanout buffer providing matched gain and delay across Y/C or RGB paths. Use Value: Matched offset voltage (≤1mV) and gain flatness (±0.1dB to 55MHz) maintain inter-channel timing alignment and color balance during switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed dual op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6702MA/NOPB | Higher 1.7GHz GBW but requires ±5.5V min supply; no rail-to-rail output (clips ~1.2V from rails) | Better for RF IF amplification; unsuitable for rail-limited video swing or ground-sensing inputs | Choose LMH6702MA/NOPB only if >1GHz bandwidth is mandatory and output swing margin >1.2V is acceptable. |
| ADA4817-2ARMZ | Lower 1GHz GBW, 250V/µs slew rate, 4.8mA per amp; rail-to-rail output but narrower 0.1dB flatness (25MHz) | Lower power, better noise (4nV/√Hz), but insufficient gain flatness for broadcast video standards | Choose ADA4817-2ARMZ for portable instrumentation where power <10mA/channel is critical and video fidelity is secondary. |
Compared with MAX4351EKA, LMH6702MA/NOPB trades rail-to-rail output and ground-sensing capability for raw bandwidth, while ADA4817-2ARMZ reduces power and noise at the expense of video-grade differential gain/phase and 0.1dB flatness - making MAX4351EKA uniquely balanced for cost-sensitive, broadcast-compliant dual-channel video systems.
Availability
MAX4351EKA is available at Aetrix Electronics and suitable for surveillance video systems, set-top box designs, and analog-to-digital converter interface circuits requiring stable component supply, consistent parametric performance across temperature, and long-term industrial lifecycle support.
Supply support for MAX4351EKA 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX4350/MAX4351 product line was designed specifically for cost-sensitive, space-constrained video signal-path applications demanding high bandwidth, low distortion, and rail-to-rail output drive - targeting set-top boxes, security cameras, and professional video equipment.
FAQ
What supply voltage range does the MAX4351EKA support?
The MAX4351EKA operates from dual ±4.5V to ±5.5V supplies, with absolute maximum ratings up to ±6V. It is not rated for single-supply operation above +10V or below 0V; however, VEE may be connected to ground for single-supply use with reduced input common-mode range (0V to +2.75V). The MAX4351EKA maintains specified AC performance only within the ±4.5V to ±5.5V range.
Does the MAX4351EKA require external compensation for unity-gain stability?
No, the MAX4351EKA is internally compensated and unity-gain stable. When used in unity-gain configuration, a 24Ω resistor in series with the feedback path (RF) is recommended to optimize AC response and suppress peaking caused by parasitic LC resonance. This resistor is not for compensation but for high-frequency damping - the MAX4351EKA remains stable without it, though with degraded 0.1dB flatness beyond 40MHz.
Can the MAX4351EKA drive 75Ω coaxial cables directly?
Yes, the MAX4351EKA can drive 75Ω coaxial cables when properly terminated: use a 24Ω series resistor (RF) at the output and back-terminate the cable with 75Ω to ground at the load end. This configuration matches impedance, minimizes reflections, and leverages the MAX4351EKA's low output impedance (1.5Ω at 10MHz) and 485V/µs slew rate to preserve signal integrity for NTSC/PAL video waveforms.
What is the input common-mode voltage range of the MAX4351EKA?
The MAX4351EKA supports an input common-mode voltage range from VEE to (VCC − 2.25V), i.e., −5V to +2.75V with ±5V supplies. This "ground-sensing" capability allows direct interfacing with 0V-referenced sources like DAC outputs or sensor amplifiers. Operation outside this range degrades CMRR and may cause nonlinear output behavior, but does not induce phase reversal or latch-up.
How does the MAX4351EKA compare to the single-channel MAX4350 in terms of pin compatibility?
The MAX4351EKA (8-pin SOT23) is not pin-compatible with the MAX4350 (5-pin SC70 or SOT23). Their pinouts differ fundamentally: MAX4350 uses pins 1–5 for OUT/VEE/IN+/IN−/VCC, while MAX4351EKA allocates pins 1–8 across two independent amplifiers with dedicated IN+/IN−/OUT per channel plus shared VEE and VCC. Board redesign is required to substitute MAX4351EKA for MAX4350 or vice versa.
MAX4351EKA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 485V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 210 MHz
- Current - Input Bias:
- 7.5 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 6.9mA (x2 Channels)
- Current - Output / Channel:
- 80 mA
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 11 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX4351EKA FAQ
1.How can I place an order for MAX4351EKA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4351EKA 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 MAX4351EKA reliable?
The price and inventory of MAX4351EKA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4351EKA is usually 5 days.
3.What payment methods are accepted for MAX4351EKA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4351EKA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4351EKA?
MAX4351EKA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4351EKA 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 MAX4351EKA?
For technical support, including MAX4351EKA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4351EKA requirements.
6.How does Aetrix verify that MAX4351EKA is sourced from the original manufacturer or authorized distributors?
All MAX4351EKA 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 MAX4351EKA meets industry standards.
7.What is the process for return or replacement of MAX4351EKA?
All MAX4351EKA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4351EKA, 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 MAX4351EKA part is unused and in its original packaging.
Return procedure for MAX4351EKA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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