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Analog Devices Inc./Maxim Integrated MAX4112EUA-T
- Part No.:
- MAX4112EUA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4112EUA-T.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
The MAX4112EUA-T from Maxim Integrated is a single-channel, low-power current-feedback operational amplifier optimized for closed-loop gains ≥2V/V, delivering 400MHz -3dB small-signal bandwidth, 1200V/µs slew rate, and ±3.5V output swing into 100Ω - enabling high-fidelity RGB video line driving and pulse amplification in broadcast and professional imaging systems.
For engineers reviewing the MAX4112EUA-T datasheet, MAX4112EUA-T pinout, MAX4112EUA-T application, or MAX4112EUA-T equivalent, this page provides verified technical context, package-specific pin functions, real-world application mappings, and validated alternative options for video signal conditioning, high-speed ADC buffering, and medical ultrasound front-ends.
Technical Context
The MAX4112EUA-T employs a current-feedback architecture with 250kΩ open-loop transimpedance (ZOL) and 30Ω input resistance at the inverting node, enabling gain-bandwidth independence at AVCL ≥ 2. Its internal biasing supports ±5V dual supplies and delivers 0.02% differential gain / 0.03° differential phase error at 3.58MHz into 150Ω, meeting broadcast video fidelity requirements.
Designed for coaxial video line driving with matched 75Ω termination, it achieves 115MHz 0.1dB gain flatness only when configured per recommended feedback networks (e.g., RF = RG = 600Ω for AVCL = +2), and requires strict high-frequency layout practices including localized 1000pF + 0.01µF ceramic bypassing at VCC/VEE pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| -3dB Bandwidth | 400MHz at AVCL ≥ 2 - supports full HD RGB pixel rates without attenuation |
| Slew Rate | 1200V/µs - enables clean 2VP-P pulse response with <0.8ns rise/fall times |
| Output Drive | ±3.5V swing into 100Ω, 80mA continuous - drives terminated 75Ω video lines with headroom |
| Supply Current | 5mA per channel at ±5V - enables multi-channel video systems with low thermal load |
| Input Noise | 2.2nV/√Hz voltage noise + 13–14pA/√Hz current noise - preserves SNR in low-level video signals |
| Differential Error | 0.02% DG / 0.03° DP at 3.58MHz - meets SMPTE 259M and ITU-R BT.601 broadcast standards |
| Harmonic Distortion | -75dBc 2nd/3rd harmonics at 5MHz, 2VP-P - ensures minimal color bleeding in composite video |
Pinout & Package
MAX4112EUA-T is housed in an 8-pin µMAX® package (U8-1), a 3mm × 3mm, 0.8mm height, thermally enhanced thin-profile SO-style package with exposed paddle for improved power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connection | Internally unconnected; must be left floating or grounded per layout best practice |
| 2 | Inverting Input (IN−) | Current-summing node for feedback network; requires low-inductance trace to OUT |
| 3 | Noninverting Input (IN+) | High-impedance reference input; shield from RF coupling and guard with ground traces |
| 4 | VEE | Negative supply pin (−5V); bypass with 1000pF + 0.01µF ceramics directly to ground plane |
| 5 | No Connection | Internally unconnected; no routing or stitching required |
| 6 | Output (OUT) | Low-impedance current-source output; route as controlled-impedance microstrip to load |
| 7 | No Connection | Internally unconnected; leave unconnected or tie to ground if mechanical stability needed |
| 8 | VCC | Positive supply pin (+5V); bypass identically to VEE with local ceramic capacitors |
Key Features
| Feature | Design Value |
|---|---|
| 400MHz −3dB bandwidth at AVCL ≥ 2 | Enables distortion-free amplification of 1080p60 RGB signals without external equalization |
| 1200V/µs slew rate | Supports <1ns edge fidelity for digital video clock recovery and pulse shaping circuits |
| 0.02% differential gain error | Meets broadcast-grade color fidelity requirements for studio monitors and camera chains |
| 5mA supply current per channel | Allows integration of four independent video channels on a single 250mW PCB power budget |
| ±3.5V output swing into 100Ω | Provides 2.1VP-P headroom for 1VP-P video signals with DC restoration margin |
Applications
| Broadcast Video Line Driver | RGB Signal Conditioning |
|---|---|
|
Use Scenario: Driving 75Ω coaxial cable between SDI transmitter and monitor in OB vans. IC Role / Device Role / Timing Role: Current-feedback video amplifier configured as unity-gain buffer with 75Ω source/load termination. Use Value: Maintains 0.02% differential gain and 0.03° phase accuracy across NTSC/PAL frequencies, eliminating hue/saturation shift. |
Use Scenario: Amplifying R/G/B analog outputs from graphics controller to LCD timing controller. IC Role / Device Role / Timing Role: High-speed, low-noise gain stage (AV = +2) with DC-coupled inputs and outputs. Use Value: Delivers 400MHz bandwidth and 2.2nV/√Hz noise floor to preserve 10-bit color depth in 4K display pipelines. |
| Ultrasound Receive Chain | High-Speed ADC Driver |
|
Use Scenario: Post-amplification of echo signals before digitization in portable ultrasound probes. IC Role / Device Role / Timing Role: Low-distortion, wide-dynamic-range driver for 12–14-bit, 40–80MSPS ADCs. Use Value: −75dBc harmonic distortion at 5MHz ensures >72dB SFDR for accurate tissue characterization. |
Use Scenario: Buffering sensor outputs (e.g., high-speed photodiode, RF detector) into SAR ADCs. IC Role / Device Role / Timing Role: Full-power bandwidth amplifier (280MHz at 2VP-P) with fast settling (<25ns to 0.01%). Use Value: Enables accurate sampling of transient events with minimal aperture uncertainty and droop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6702MF/NOPB | Higher 1.7GHz GBW but 12mA supply current; 1000V/µs slew rate; SO-8 package only | Better bandwidth for >1Gbps serial links; less suitable for battery-powered video systems | Select when >1GHz small-signal BW is required and power budget allows +7mA/channel |
| AD8001ARZ | 320MHz −3dB BW, 1600V/µs slew, 7mA supply current; SO-8, same pinout as MAX4112EUA-T | Lower bandwidth but superior PSRR (70dB vs. 60dB) and lower input capacitance (1.5pF vs. 2pF) | Prefer for noisy industrial environments where supply rejection matters more than raw speed |
Compared with LMH6702MF/NOPB and AD8001ARZ, the MAX4112EUA-T offers optimal balance of 400MHz bandwidth, 5mA quiescent current, and broadcast-grade video linearity - making it the preferred choice for space-constrained, multi-channel RGB video systems requiring low thermal footprint and SMPTE-compliant fidelity.
Availability
MAX4112EUA-T is available at Aetrix Electronics and suitable for broadcast video infrastructure, professional camera signal chains, and medical ultrasound equipment requiring stable component supply and long-term production continuity.
Supply support for MAX4112EUA-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, mixed-signal, and high-speed ICs for demanding performance applications in communications, computing, and industrial systems.
The MAX4112EUA-T belongs to Maxim's high-speed current-feedback op amp family, engineered specifically for broadcast video, medical imaging, and instrumentation where bandwidth, linearity, and low power must coexist.
FAQ
What is the maximum closed-loop gain supported by the MAX4112EUA-T without bandwidth degradation?
The MAX4112EUA-T is optimized for closed-loop gains of 2V/V or greater. At AVCL = +2, it delivers full 400MHz −3dB bandwidth and 1200V/µs slew rate. Gains below +2 cause peaking and instability due to reduced phase margin; the datasheet explicitly warns against use at AVCL < 2. For higher gains, bandwidth scales inversely - e.g., AVCL = +5 reduces −3dB BW to ~145MHz. The MAX4112EUA-T must be used within its specified gain range to ensure stability and performance.
Can the MAX4112EUA-T drive a 75Ω coaxial cable directly without external components?
Yes - the MAX4112EUA-T is designed for direct 75Ω video line driving. When configured as a gain-of-2 amplifier with RF = RG = 600Ω and terminated with 75Ω at both source and load ends (per Figure 4 in the datasheet), it achieves 0.02% differential gain and 0.03° differential phase error at 3.58MHz. No series resistor or external equalization is needed. However, proper PCB layout - including ground-plane integrity, short microstrip traces, and localized 1000pF + 0.01µF bypassing - is mandatory to maintain this performance.
What is the recommended power-supply bypassing scheme for the MAX4112EUA-T?
Per Maxim's layout guidelines, each supply pin (VCC and VEE) of the MAX4112EUA-T requires two parallel ceramic capacitors placed as close as possible to the pin: a 1000pF capacitor and a 0.01µF to 0.1µF capacitor. These must connect directly to a solid, low-impedance ground plane. Additionally, a 10µF to 15µF low-ESR tantalum capacitor should be placed at the PCB power entry point, with short, direct traces from it to the VCC/VEE pins. This three-tier bypassing prevents high-frequency oscillation and preserves 400MHz bandwidth.
Does the MAX4112EUA-T support single-supply operation?
No - the MAX4112EUA-T is specified only for dual-supply operation from ±4.5V to ±5.5V (±5V typical). Its input common-mode range is ±2.5V and output swing is symmetric about ground (±3.5V into 100Ω). It lacks rail-to-rail input or output capability and does not function correctly with single-ended supplies. For single-supply video applications, consider alternatives like the THS3201 or ADA4891-1, which are explicitly characterized for 3V–5V operation.
How does the MAX4112EUA-T compare to the MAX4113EUA-T in terms of video performance?
The MAX4112EUA-T and MAX4113EUA-T are complementary: MAX4112EUA-T is optimized for AVCL ≥ 2 (400MHz BW, 1200V/µs), while MAX4113EUA-T targets AVCL ≥ 8 (270MHz BW, 1800V/µs). For RGB video (typically AV = +2), MAX4112EUA-T delivers superior bandwidth and lower differential phase error (0.03° vs. 0.04°). MAX4113EUA-T excels in high-gain pulse amplification but sacrifices small-signal flatness below 115MHz. Neither is a drop-in replacement - pinouts differ, and gain optimization is hardwired in the internal compensation.
MAX4112EUA-T 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-T FAQ
1.How can I place an order for MAX4112EUA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4112EUA-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 MAX4112EUA-T reliable?
The price and inventory of MAX4112EUA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4112EUA-T is usually 5 days.
3.What payment methods are accepted for MAX4112EUA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4112EUA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4112EUA-T?
MAX4112EUA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4112EUA-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 MAX4112EUA-T?
For technical support, including MAX4112EUA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4112EUA-T requirements.
6.How does Aetrix verify that MAX4112EUA-T is sourced from the original manufacturer or authorized distributors?
All MAX4112EUA-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 MAX4112EUA-T meets industry standards.
7.What is the process for return or replacement of MAX4112EUA-T?
All MAX4112EUA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4112EUA-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 MAX4112EUA-T part is unused and in its original packaging.
Return procedure for MAX4112EUA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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