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Analog Devices Inc./Maxim Integrated MAX4286EUT-T
- Part No.:
- MAX4286EUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX4286EUT-T.pdf
- Description:
- IC BUFFER 1 CIRCUIT SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:3,115
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Product details
Overview
MAX4286EUT-T from Maxim Integrated is a single-channel, high-speed voltage-feedback operational amplifier optimized as an ADC input buffer for communications and instrumentation systems. It operates from a +2.85V to +6.5V single supply, delivers 150MHz -3dB bandwidth at minimum gain of +5V/V, achieves 350V/µs slew rate and 8ns (to 0.1%) settling time, and features active-low disable with 40ns enable / 50ns disable timing - enabling multiplexed ADC front-end architectures.
For engineers reviewing the MAX4286EUT-T datasheet, MAX4286EUT-T pinout, MAX4286EUT-T application, or MAX4286EUT-T equivalent, this page provides verified electrical specifications, SOT23-6 package layout context, disable timing behavior, output drive capability (+77mA / –106mA), and real-world ADC driver use cases - all confirmed against Maxim's official 19-1500 Rev 0 datasheet.
Technical Context
The MAX4286EUT-T is internally compensated for stable operation at closed-loop gains ≥ +5V/V, distinguishing it from unity-gain-stable variants like MAX4285. Its voltage-feedback architecture supports high dynamic performance with low distortion (88dBc SFDR at f = 5MHz) and wide common-mode input range extending to VEE (ground in single-supply mode).
It integrates a dedicated active-low DISABLE pin that reduces quiescent current to 1mA and raises output impedance to ~35kΩ when asserted - enabling clean signal routing in time-division multiplexed ADC sampling paths without external switches or isolation resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| -3dB Bandwidth | 150MHz at AV = +5V/V - enables accurate buffering of IF/RF baseband signals up to 75MHz Nyquist zone. |
| Slew Rate | 350V/µs - supports full-scale step response for 12-bit+ ADCs sampling at ≥20MSPS without slewing-induced distortion. |
| Settling Time | 8ns to 0.1% - ensures sub-1-LSB settling before ADC aperture window closes in high-speed sampling systems. |
| Output Drive | +77mA source / –106mA sink - directly drives low-impedance ADC inputs (e.g., 50Ω differential or 100Ω parallel-terminated traces). |
| Disable Timing | 40ns enable / 50ns disable - allows precise synchronization with ADC sample clock edges in time-interleaved or channel-multiplexed systems. |
| Input Voltage Range | Extends to VEE (0V in single supply) - accommodates ground-referenced sensor outputs or DC-coupled baseband signals without level-shifting. |
| Supply Range | +2.85V to +6.5V single supply - compatible with 3.3V and 5V system rails, eliminating need for dual supplies in portable instrumentation. |
Pinout & Package
MAX4286EUT-T is packaged in a 6-pin SOT23-6 surface-mount package (JEDEC MO-178AA), footprint-compatible with industry-standard SOT-23 layouts and reflow-process ready. Thermal resistance θJA = 140°C/W; maximum power dissipation at +70°C ambient is 571mW.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - drives ADC input directly; high-impedance state when DISABLE = low. |
| 2 | N.C. | No internal connection - must be left floating or grounded per layout best practices. |
| 3 | IN– | Inverting input - used in inverting configurations or feedback path; 2pF typical input capacitance affects stability with large RG/RF. |
| 4 | IN+ | Noninverting input - accepts single-ended or differential input signals; common-mode range includes VEE (0V). |
| 5 | DISABLE | Active-low enable control - logic low disables amplifier, reducing supply current to 1mA and raising output Z to ~35kΩ. |
| 6 | VCC | Positive supply rail - bypass with 0.1nF ceramic capacitor placed <1mm from pin to ensure high-frequency PSRR >40dB. |
Key Features
| Feature | Design Value |
|---|---|
| High-speed disable | 40ns enable / 50ns disable with 1mA disabled supply current - enables time-sliced signal routing without external analog switches. |
| Low distortion at 5MHz | 88dBc SFDR - preserves ENOB in 12-bit+ ADC systems sampling baseband or IF signals near Nyquist. |
| Single-supply operation | +2.85V to +6.5V range with rail-to-rail input down to VEE - eliminates level-shifting circuitry for ground-referenced sensors. |
| High output current | +77mA source / –106mA sink into 20Ω loads - drives terminated transmission lines and low-Z ADC inputs without external buffers. |
| Stability at AV ≥ +5V/V | Internally compensated for minimum gain of +5 - avoids external compensation networks required by unity-gain op amps. |
Applications
| Communications Baseband Buffering | Portable Instrumentation Front-End |
|---|---|
Use Scenario: Conditioning I/Q baseband signals prior to 100MSPS ADC in software-defined radio transceivers. IC Role / Device Role / Timing Role: Single-ended to differential conversion and gain-setting buffer with precise disable timing synchronized to ADC sample clock. Use Value: 150MHz bandwidth and 8ns settling preserve modulation accuracy across 20MHz LTE channels; disable feature isolates unused I/Q path during TDD switching. |
Use Scenario: Driving 14-bit, 1MSPS SAR ADC in handheld multimeter or oscilloscope probe interface. IC Role / Device Role / Timing Role: High-impedance input buffer with rail-to-rail input capability, providing gain and drive for low-power ADC input stage. Use Value: Input common-mode range to VEE allows direct connection to ground-referenced DMM input dividers; 3.3V operation minimizes battery drain. |
| Ultrasound Beamformer Channel | CCD Imaging Signal Chain |
Use Scenario: Amplifying and multiplexing analog echo signals from 128-element phased array transducer before digitization. IC Role / Device Role / Timing Role: Per-channel ADC driver with fast disable enabling sequential channel readout without crosstalk. Use Value: 35kΩ disabled output impedance prevents loading of adjacent active channels; 350V/µs slew rate supports 10MHz ultrasound bursts. |
Use Scenario: Buffering low-noise, low-swing analog video output from interline-transfer CCD in industrial machine vision camera. IC Role / Device Role / Timing Role: Low-distortion, low-noise gain stage preceding correlated double sampling (CDS) and ADC. Use Value: 10nV/√Hz input voltage noise and 88dBc SFDR maintain >70dB SNR in 12-bit imaging; 6-pin SOT23 saves board space in compact pixel-processing modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ADC buffer amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4285EUT-T | Unity-gain stable (AV ≥ +1V/V); 250MHz bandwidth; same SOT23-6 package and disable timing. | Better suited for variable-gain or unity-gain configurations where gain may drop below +5V/V. | Select MAX4285EUT-T if system requires flexibility to operate at AV = +1V/V or lower without external compensation. |
| ADA4817-1ARMZ | 1GHz bandwidth, 250V/µs slew rate, no disable function; 6-pin SOT23 package; higher supply current (16mA). | Targeted at ultra-wideband applications (>200MHz) where disable functionality is unnecessary and power budget allows. | Choose ADA4817-1ARMZ only when bandwidth >200MHz is mandatory and disable control is handled externally or omitted. |
Compared with MAX4285EUT-T, MAX4286EUT-T trades unity-gain stability for guaranteed +5V/V minimum gain performance and tighter distortion specs at mid-band frequencies - making it preferable for fixed-gain ADC driver stages. Compared with ADA4817-1ARMZ, it offers integrated disable control and lower quiescent power at the cost of bandwidth, better aligning with cost-sensitive, multiplexed data acquisition systems.
Availability
MAX4286EUT-T is available at Aetrix Electronics and suitable for high-speed data acquisition, portable test equipment, and medical ultrasound systems requiring stable component supply, consistent parametric performance across temperature, and long-term production continuity.
Supply support for MAX4286EUT-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 power management ICs for demanding industrial, communications, and medical applications - emphasizing high performance, small size, and robust operation.
The MAX4285–MAX4288 family was engineered specifically as high-speed, low-distortion ADC buffer amplifiers with integrated disable control - targeting applications where signal integrity, power gating, and space-constrained PCB layouts are critical design constraints.
FAQ
What is the minimum stable gain for MAX4286EUT-T?
The MAX4286EUT-T is internally compensated for stable operation at closed-loop gains of +5V/V or greater. Operating at gains below +5V/V may cause peaking or oscillation unless external compensation is added. This distinguishes it from the MAX4285EUT-T, which is unity-gain stable. Always verify stability with actual load conditions using the recommended 300Ω feedback resistor value.
Does MAX4286EUT-T support true rail-to-rail input?
MAX4286EUT-T supports rail-to-rail input common-mode range down to VEE (0V in single-supply operation), but not up to VCC. The specified input common-mode voltage range extends from VEE to VCC – 1.25V. For a +3.3V supply, this means input signals can go from 0V to +2.05V - sufficient for most ground-referenced sensor and baseband signals, but not for full VCC-swing AC-coupled inputs without offset adjustment.
What is the output impedance of MAX4286EUT-T when disabled?
When the DISABLE pin is pulled low, the MAX4286EUT-T places its output in a high-impedance state with typical output impedance of ~35kΩ. This is confirmed in the "Detailed Description" section and supported by typical operating characteristics showing off-isolation >80dB at 100MHz. The 2pF output capacitance remains, so total output Z is dominated by resistive component above ~500kHz.
Can MAX4286EUT-T drive a 50Ω transmission line directly?
Yes - MAX4286EUT-T delivers ±106mA output current, enabling direct drive of 50Ω loads with up to ±5.3V swing (at VCC = 5V). However, for optimal stability and minimal ringing, Maxim recommends adding a 20Ω to 30Ω series isolation resistor between the amplifier output and the 50Ω line, especially when driving capacitive loads >2pF or long PCB traces. This matches the guidance in Figure 1 of the datasheet.
Is MAX4286EUT-T pin-compatible with MAX4285EUT-T?
Yes - MAX4286EUT-T and MAX4285EUT-T share identical 6-pin SOT23-6 pinouts (OUT, N.C., IN–, IN+, DISABLE, VCC) and thermal/mechanical footprints. They differ only in internal compensation and gain-bandwidth trade-offs. This allows direct substitution in existing layouts when changing from unity-gain to fixed +5V/V gain configurations - provided the application does not require gain < +5V/V.
MAX4286EUT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Buffer
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 385V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 130 MHz
- Current - Input Bias:
- 13 µA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 23mA
- Current - Output / Channel:
- 106 mA
- Voltage - Supply Span (Min):
- 2.85 V
- Voltage - Supply Span (Max):
- 6.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX4286EUT-T FAQ
1.How can I place an order for MAX4286EUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4286EUT-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 MAX4286EUT-T reliable?
The price and inventory of MAX4286EUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4286EUT-T is usually 5 days.
3.What payment methods are accepted for MAX4286EUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4286EUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4286EUT-T?
MAX4286EUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4286EUT-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 MAX4286EUT-T?
For technical support, including MAX4286EUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4286EUT-T requirements.
6.How does Aetrix verify that MAX4286EUT-T is sourced from the original manufacturer or authorized distributors?
All MAX4286EUT-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 MAX4286EUT-T meets industry standards.
7.What is the process for return or replacement of MAX4286EUT-T?
All MAX4286EUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4286EUT-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 MAX4286EUT-T part is unused and in its original packaging.
Return procedure for MAX4286EUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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