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Analog Devices Inc./Maxim Integrated MAX4451EKA-T
- Part No.:
- MAX4451EKA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8
- Datasheet:
-
MAX4451EKA-T.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,761
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Product details
Overview
MAX4451EKA-T 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 delivers 210MHz -3dB bandwidth, 485V/µs slew rate, and 0.02%/0.08° differential gain/phase error while operating from a single +4.5V to +11V supply or dual ±2.25V to ±5.5V supplies. Its 8-pin SOT23 package supports compact video line driver and ADC interface designs.
For engineers reviewing the MAX4451EKA-T datasheet, MAX4451EKA-T pinout, MAX4451EKA-T application, or MAX4451EKA-T equivalent, key selection criteria include its 210MHz small-signal bandwidth, rail-to-rail output swing within 55mV of rails, input common-mode range extending beyond VEE, low 6.5mA per-amplifier quiescent current, and verified performance in 75Ω video routing systems.
Technical Context
The MAX4451EKA-T employs voltage-feedback architecture enhanced with current-feedback techniques to achieve high slew rate and wide bandwidth without sacrificing stability at unity gain. Its input stage supports common-mode voltages from (VEE − 0.2V) to (VCC − 2.25V), enabling ground-sensing operation in single-supply systems.
Output stage uses local feedback to maintain low open-loop output impedance (1.5Ω typical), ensuring minimal gain variation across load conditions up to 100Ω. The device is internally compensated and requires only a 24Ω feedback resistor in unity-gain configuration to optimize AC response and suppress parasitic resonance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| -3dB Bandwidth | 210MHz - supports full HD video baseband signal amplification without attenuation |
| Slew Rate | 485V/µs - enables clean 2V step response in ≤16ns, critical for fast video pulse fidelity |
| Differential Gain/Phase | 0.02%/0.08° - meets NTSC/PAL broadcast-grade video linearity requirements |
| Supply Range | +4.5V to +11V single supply - compatible with 5V and 9V industrial and portable systems |
| Quiescent Current | 6.5mA per amplifier - enables dual-channel operation in battery-powered instruments |
| Input Common-Mode Range | Extends 200mV below VEE - allows true ground-referenced input in single-supply 0V–5V systems |
| Rail-to-Rail Output | Swings to within 55mV of VCC/VEE - maximizes dynamic range for 4.9VP-P output on 5V supply |
| THD @ 5MHz | −63dB - ensures low distortion in CCD imaging and analog front-end applications |
Pinout & Package
MAX4451EKA-T is housed in an 8-pin SOT23 package (package code K8-2), measuring 4.0mm × 3.0mm × 1.45mm with gull-wing leads and RoHS-compliant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - INB− | Inverting input, Channel B | Accepts differential or inverting signal path for second amplifier channel |
| 2 - INB+ | Noninverting input, Channel B | Supports single-ended or differential input configurations for Channel B |
| 3 - VEE | Negative supply / ground | Reference node for dual-supply operation or system ground in single-supply mode |
| 4 - OUTB | Output, Channel B | Delivers rail-to-rail output with <1.5Ω source impedance into 100Ω loads |
| 5 - OUTA | Output, Channel A | Independent output capable of driving 75Ω video lines directly when terminated |
| 6 - INA+ | Noninverting input, Channel A | Primary high-impedance input for Channel A; supports common-mode down to VEE − 0.2V |
| 7 - INA− | Inverting input, Channel A | Used in inverting gain configurations or as feedback node in noninverting setups |
| 8 - VCC | Positive supply | Accepts +4.5V to +11V; requires 0.1µF ceramic bypass capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Enables >98% supply utilization (e.g., 4.9VP-P on 5V rail), maximizing SNR in ADC interface circuits |
| 210MHz small-signal bandwidth | Preserves edge integrity in 1080p video signals and fast-settling data acquisition paths |
| 0.02% differential gain error | Meets broadcast video specification limits without external calibration or trimming |
| 6.5mA per amplifier supply current | Allows dual-channel high-speed amplification in thermally constrained handheld instruments |
| Unity-gain stable with 24Ω RF | Eliminates need for external compensation components in video line driver reference designs |
| Input common-mode beyond VEE | Permits direct connection of 0V-referenced sensors or DAC outputs without level-shifting circuitry |
Applications
| Video Line Driver | Analog-to-Digital Converter Interface |
|---|---|
Use Scenario: Driving 75Ω coaxial cable in surveillance camera output stages. IC Role / Device Role / Timing Role: Dual-channel buffer and level shifter delivering full-swing NTSC/PAL signals with minimal group delay. Use Value: 0.02%/0.08° differential gain/phase error ensures color fidelity over 300ft cable runs without post-processing. | Use Scenario: Conditioning analog sensor outputs before sampling by 10-bit+ ADCs in portable test equipment. IC Role / Device Role / Timing Role: High-fidelity signal amplifier with rail-to-rail output matching ADC input range and minimizing headroom loss. Use Value: −63dB THD at 5MHz preserves resolution in wideband sensor digitization without introducing harmonic artifacts. |
| CCD Imaging Systems | Video Routing and Switching Systems |
Use Scenario: Amplifying low-noise, low-level CCD pixel outputs in digital camera image signal processors. IC Role / Device Role / Timing Role: Low-noise (10nV/√Hz), high-slew-rate buffer isolating CCD array from downstream processing stages. Use Value: 485V/µs slew rate supports >10MHz pixel clock rates while maintaining <16ns settling time to 0.1%. | Use Scenario: Selecting and distributing composite video signals among multiple displays in set-top box backplanes. IC Role / Device Role / Timing Role: Dual-channel video switch driver providing isolated, impedance-matched outputs to parallel display paths. Use Value: 102dB channel-to-channel isolation prevents crosstalk between active video sources during switching transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6702MA/NOPB | Higher 1.8GHz bandwidth but 15mA quiescent current; SOIC-8 only; no rail-to-rail output | Better for RF IF amplification; unsuitable for rail-constrained 5V video systems requiring full output swing | Choose LMH6702MA/NOPB only when >1GHz bandwidth is mandatory and power budget allows 2.3× higher current draw. |
| ADA4817-2ARMZ | Faster 1GHz bandwidth and lower 4.3nV/√Hz noise, but requires dual ±5V supply; 8-MSOP package | Preferred for precision low-noise photodiode preamps; incompatible with single +5V video line drivers | Select ADA4817-2ARMZ when ultra-low noise and high DC precision outweigh single-supply convenience and cost sensitivity. |
Compared with MAX4451EKA-T, LMH6702MA/NOPB trades rail-to-rail output and low power for raw bandwidth, while ADA4817-2ARMZ prioritizes noise and DC accuracy over supply flexibility-making MAX4451EKA-T the optimal choice for cost-sensitive, space-constrained, single-supply video signal chains demanding broadcast-grade linearity.
Availability
MAX4451EKA-T is available at Aetrix Electronics and suitable for video line driver, analog-to-digital converter interface, and CCD imaging systems requiring stable component supply across production lifecycles.
Supply support for MAX4451EKA-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) is a U.S.-based semiconductor company specializing in high-performance analog and mixed-signal ICs for industrial, communications, and consumer applications.
The MAX4450/MAX4451 product line was designed specifically for high-fidelity, low-power video signal conditioning-targeting set-top boxes, surveillance systems, and portable instrumentation where bandwidth, linearity, and supply efficiency are jointly critical.
FAQ
What is the maximum capacitive load the MAX4451EKA-T can drive without oscillation?
The MAX4451EKA-T is not optimized for direct capacitive loading. Driving >10pF without isolation causes peaking and instability. A series isolation resistor (20Ω–30Ω) is required for loads >10pF; Figure 3 in the datasheet shows optimal RISO vs. CL. For example, a 68pF load requires ~27Ω RISO to maintain flat frequency response. MAX4451EKA-T must never be used to drive unterminated coaxial cable or large PCB traces without this resistor.
Does the MAX4451EKA-T support dual-supply operation, and what are the valid voltage ranges?
Yes, MAX4451EKA-T supports dual-supply operation from ±2.25V to ±5.5V. Valid combinations include ±2.5V, ±3V, ±5V, and asymmetric rails such as +5V/−2.5V, provided total supply voltage (VCC − VEE) does not exceed +12V. Absolute maximum ratings specify VIN and VOUT must remain within (VEE − 0.3V) to (VCC + 0.3V). MAX4451EKA-T maintains rail-to-rail output swing and input common-mode range across all supported dual-supply configurations.
Can the MAX4451EKA-T be used in a unity-gain follower configuration without external compensation?
Yes, MAX4451EKA-T is unity-gain stable and requires no external compensation. However, a 24Ω resistor must be placed in series with the feedback path (between OUT and IN−) to dampen parasitic LC resonance caused by board layout capacitance and inductance. Omitting this resistor results in gain peaking and potential oscillation above 100MHz. This requirement is explicitly specified in the Applications Information section and validated in Figures 1a and 4 of the MAX4451EKA-T datasheet.
What is the guaranteed operating temperature range for the MAX4451EKA-T?
The MAX4451EKA-T is specified for continuous operation from −40°C to +85°C. All electrical characteristics-including bandwidth, slew rate, THD, and differential gain/phase-are guaranteed across this full industrial temperature range. Thermal derating begins at +70°C, with power dissipation limited to 421mW at ambient (derated by 5.26mW/°C above +70°C for the 8-pin SOT23 package). MAX4451EKA-T has been production-tested at +25°C and characterized via design simulation over temperature extremes.
How does the MAX4451EKA-T achieve rail-to-rail output with only 55mV headroom?
MAX4451EKA-T achieves rail-to-rail output using a patented output stage topology with local feedback that actively regulates saturation voltage across process, voltage, and temperature variations. The 55mV maximum headroom (VOL − VEE and VCC − VOH) is measured under load (2kΩ) and guaranteed across −40°C to +85°C. This architecture eliminates crossover distortion and maintains linearity near the rails-critical for preserving dynamic range in video and ADC interface applications. MAX4451EKA-T's output stage is distinct from conventional push-pull designs and is validated in the "Output Voltage Swing vs. Resistive Load" plot (Figure MAX4450-13).
MAX4451EKA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 485V/µs
- Gain Bandwidth Product:
- 175 MHz
- -3db Bandwidth:
- 210 MHz
- Current - Input Bias:
- 6.5 µA
- Voltage - Input Offset:
- 4 mV
- Current - Supply:
- 6.5mA (x2 Channels)
- Current - Output / Channel:
- 70 mA
- Voltage - Supply Span (Min):
- 4.5 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
MAX4451EKA-T FAQ
1.How can I place an order for MAX4451EKA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4451EKA-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 MAX4451EKA-T reliable?
The price and inventory of MAX4451EKA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4451EKA-T is usually 5 days.
3.What payment methods are accepted for MAX4451EKA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4451EKA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4451EKA-T?
MAX4451EKA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4451EKA-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 MAX4451EKA-T?
For technical support, including MAX4451EKA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4451EKA-T requirements.
6.How does Aetrix verify that MAX4451EKA-T is sourced from the original manufacturer or authorized distributors?
All MAX4451EKA-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 MAX4451EKA-T meets industry standards.
7.What is the process for return or replacement of MAX4451EKA-T?
All MAX4451EKA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4451EKA-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 MAX4451EKA-T part is unused and in its original packaging.
Return procedure for MAX4451EKA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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