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Analog Devices Inc./Maxim Integrated MAX4112EUA
- Part No.:
- MAX4112EUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4112EUA.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,889
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Product details
Overview
MAX4112EUA from Maxim Integrated is a single-channel, low-power current-feedback amplifier optimized for closed-loop gains ≥2V/V, delivering 400MHz -3dB bandwidth, 1200V/µs slew rate, and ±3.5V output swing into 100Ω - ideal for RGB video line driving and high-speed ADC buffering in broadcast and professional camera systems.
For engineers reviewing the MAX4112EUA datasheet, MAX4112EUA pinout, MAX4112EUA application, or MAX4112EUA equivalent, key selection criteria include its 400MHz small-signal bandwidth at AVCL = +2, 280MHz full-power bandwidth (2VP-P), 0.02% differential gain error, and µMAX-8 package compatibility with space-constrained video signal-path layouts.
Technical Context
The MAX4112EUA operates as a current-feedback op amp with transimpedance architecture (ZOL ≈ 500kΩ), enabling gain-bandwidth independence at low closed-loop gains. Its inverting input (IN−) serves as high-impedance current summing node, while noninverting input (IN+) provides unity-gain buffer path to minimize input capacitance effects.
Designed for ±5V dual supplies, it features matched input bias currents (±3.5µA typ), 2.2nV/√Hz input voltage noise, and 13–14pA/√Hz input current noise - critical for preserving SNR in wideband video and pulse amplification where distortion and settling time dominate system fidelity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| -3dB Bandwidth | 400MHz at AVCL = +2 - supports full HD RGB timing without gain roll-off up to pixel clock frequencies. |
| Slew Rate | 1200V/µs - enables clean 2VP-P square-wave reproduction up to 280MHz full-power bandwidth. |
| Output Swing | ±3.5V into 100Ω - drives standard 75Ω coaxial video lines with 1VPP headroom at ±5V supplies. |
| Differential Gain | 0.02% - meets SMPTE 253M broadcast video accuracy requirements for color fidelity. |
| Supply Current | 5mA per channel - enables multi-amplifier video channel designs with thermal budget under 100mW/channel. |
| Input Noise | 2.2nV/√Hz voltage noise + 13pA/√Hz (IN+) / 14pA/√Hz (IN−) - preserves dynamic range in 10-bit+ imaging front-ends. |
| Settling Time | 25ns to 0.1% (AVCL = +2) - satisfies sub-10ns pixel period constraints in 1080p60 systems. |
Pinout & Package
The MAX4112EUA is housed in an 8-pin µMAX package (U8-1), a compact 3mm × 3mm exposed-pad SO-style封装 with thermal enhancement for high-speed analog operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 8 | No Connection | Internally unconnected; must remain floating or grounded per layout best practices to avoid parasitic coupling. |
| 2 | IN− | Inverting input - high-impedance current-summing node; requires external feedback network (RF) for stability and gain control. |
| 3 | IN+ | Noninverting input - low-capacitance (2pF) buffer input; used for unity-gain follower or noninverting configurations. |
| 4 | VEE | Negative supply - connect directly to -5V with local 1000pF + 0.01µF ceramic bypass to ground plane. |
| 6 | OUT | Amplifier output - capable of sourcing/sinking 80mA; drive 75Ω/100Ω loads directly with <0.03° differential phase error. |
| 7 | VCC | Positive supply - connect directly to +5V with identical bypassing as VEE; symmetric supply essential for rail-to-rail swing. |
Key Features
| Feature | Design Value |
|---|---|
| Current-feedback architecture | Enables stable operation at AVCL ≥2 with minimal peaking; bandwidth remains flat across gain settings unlike voltage-feedback alternatives. |
| Low-distortion video driver | 0.02% differential gain / 0.03° differential phase error at 3.58MHz ensures broadcast-grade color reproduction in RGB and composite video paths. |
| High-output-current capability | 80mA drive strength allows direct termination of 75Ω coaxial cables without external buffers - reducing BOM count and board area. |
| Optimized power-speed tradeoff | 5mA supply current delivers 400MHz bandwidth - 2.5× higher speed-per-mA than comparable voltage-feedback op amps in same class. |
| Robust capacitive-load handling | Stable with ≤10pF load when using 5–22Ω isolation resistor (RS); eliminates oscillation in PCB trace or connector parasitics. |
Applications
| Broadcast Video Line Driver | RGB Signal Conditioning |
|---|---|
Use Scenario: Driving 75Ω coaxial cable between video processing ASIC and SDI/HDMI transmitter in studio equipment. IC Role / Device Role / Timing Role: Final-stage current-feedback buffer providing gain, level-shifting, and impedance matching with minimal group delay. Use Value: 0.02% differential gain error preserves chroma integrity over 100m cable runs; 400MHz bandwidth accommodates 3G-SDI pixel clocks. | Use Scenario: Amplifying R/G/B analog outputs from graphics controller to CRT/LCD panel interface in medical imaging displays. IC Role / Device Role / Timing Role: High-fidelity, low-noise gain stage maintaining sub-nanosecond edge alignment across three parallel channels. Use Value: 25ns settling time ensures pixel-edge fidelity at 1920×1080@60Hz; ±3.5V swing matches panel input dynamic range. |
| High-Speed ADC Input Buffer | Pulse Amplifier for Ultrasound |
Use Scenario: Buffering sensor signals into 12-bit, 100MSPS ADC in portable test equipment with tight THD budget. IC Role / Device Role / Timing Role: Low-noise, low-distortion driver minimizing aperture uncertainty and harmonic corruption before sampling. Use Value: 2.2nV/√Hz input noise contributes <0.5 LSB noise floor; 1200V/µs slew rate prevents slewing-induced distortion on fast transients. | Use Scenario: Amplifying narrow-pulse echoes (1–15MHz) from piezoelectric transducers in handheld ultrasound probes. IC Role / Device Role / Timing Role: Wideband, low-phase-shift gain block preserving pulse shape and time-of-flight accuracy. Use Value: 0.03° differential phase error minimizes beamforming timing skew; 280MHz full-power bandwidth captures 15MHz harmonics cleanly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS3091DR | Higher 2100V/µs slew rate but 7.5mA supply current; 375MHz bandwidth at AVCL = +2; no specified differential gain/phase. | Better for ultra-fast pulse shaping but lacks broadcast video characterization; requires tighter layout control due to higher bandwidth. | Select THS3091DR only when >2000V/µs slew is mandatory and video accuracy is secondary. |
| LMH6720MA | 450MHz bandwidth at AVCL = +2, 1800V/µs slew, 6.5mA supply; differential gain 0.05% - looser than MAX4112EUA's 0.02%. | Acceptable for industrial video but not SMPTE-compliant broadcast systems; higher power dissipation limits channel density. | Choose LMH6720MA for cost-sensitive industrial cameras where 0.05% gain error is acceptable. |
Compared with THS3091DR and LMH6720MA, the MAX4112EUA uniquely balances broadcast-grade video accuracy (0.02% DG), low 5mA power, and 400MHz bandwidth in a 3mm × 3mm µMAX package - making it optimal for space-constrained, multi-channel HD video systems requiring guaranteed differential performance.
Availability
MAX4112EUA is available at Aetrix Electronics and suitable for broadcast video line drivers, RGB signal conditioning, and high-speed ADC buffering requiring stable component supply across industrial, medical, and professional imaging programs.
Supply support for MAX4112EUA 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 signal-chain applications including communications, sensing, and power management.
The MAX4112EUA belongs to Maxim's high-speed current-feedback amplifier product line, engineered specifically for broadcast video, medical ultrasound, and instrumentation systems requiring wide bandwidth, low distortion, and low power in miniature packages.
FAQ
What is the recommended power-supply bypassing scheme for MAX4112EUA?
For optimal AC performance, place a 1000pF ceramic capacitor between each supply pin (VCC and VEE) and the ground plane, located as close to the package as possible. In parallel, add a 0.01µF to 0.1µF ceramic capacitor. Then use a 10µF to 15µF low-ESR tantalum capacitor at the PCB power entry point. The MAX4112EUA requires symmetric ±5V supplies with this multi-tier bypassing to maintain 400MHz bandwidth and low distortion.
Can MAX4112EUA drive a 75Ω coaxial cable directly?
Yes, the MAX4112EUA can directly drive a 75Ω coaxial cable when configured as a video line driver with proper termination. Its ±3.5V output swing into 100Ω and 80mA output current support 1VPP signal levels on 75Ω lines. For SMPTE 253M compliance, use RG = RF = 600Ω feedback network and ensure differential gain remains at 0.02% - verified in the MAX4112EUA datasheet under 3.58MHz conditions.
What is the maximum closed-loop gain for stable operation of MAX4112EUA?
The MAX4112EUA is optimized for closed-loop gains of 2V/V or greater. Operation below AVCL = +2 may cause instability or peaking due to reduced phase margin. The device's current-feedback architecture maintains flat bandwidth up to AVCL = +10, but gain flatness degrades beyond that; for AVCL > +10, external compensation or alternative amplifiers like MAX4113EUA (optimized for ≥8V/V) are recommended.
How does MAX4112EUA compare to MAX4113EUA in terms of bandwidth and application fit?
The MAX4112EUA offers 400MHz -3dB bandwidth at AVCL = +2 and 280MHz full-power bandwidth, targeting RGB video and medium-gain ADC buffering. In contrast, the MAX4113EUA is optimized for AVCL ≥8V/V, delivering 270MHz -3dB bandwidth and 240MHz full-power bandwidth with superior 0.1dB gain flatness to 115MHz - making it better suited for high-gain pulse amplification and RF IF stages where flatness matters more than raw bandwidth.
Is thermal performance adequate in the µMAX-8 package for continuous 5mA operation?
Yes - the MAX4112EUA in the µMAX-8 package (U8-1) has a specified continuous power dissipation of 330mW at TA = +70°C (derating 4.10mW/°C above). At 5mA per channel with ±5V supplies, total power is ~50mW, well within thermal limits. The exposed pad enhances thermal conduction; PCB layout should include ≥2cm² copper pour connected to VEE for optimal heat sinking, ensuring junction temperature stays <85°C in typical +60°C ambient environments.
MAX4112EUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1200V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 400 MHz
- Current - Input Bias:
- 3.5 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 5mA
- 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:
- 8-µMAX
MAX4112EUA FAQ
1.How can I place an order for MAX4112EUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4112EUA 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 MAX4112EUA reliable?
The price and inventory of MAX4112EUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4112EUA is usually 5 days.
3.What payment methods are accepted for MAX4112EUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4112EUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4112EUA?
MAX4112EUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4112EUA 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 MAX4112EUA?
For technical support, including MAX4112EUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4112EUA requirements.
6.How does Aetrix verify that MAX4112EUA is sourced from the original manufacturer or authorized distributors?
All MAX4112EUA 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 MAX4112EUA meets industry standards.
7.What is the process for return or replacement of MAX4112EUA?
All MAX4112EUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4112EUA, 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 MAX4112EUA part is unused and in its original packaging.
Return procedure for MAX4112EUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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