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Analog Devices Inc./Maxim Integrated MAX4387EUA+T
- Part No.:
- MAX4387EUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4387EUA+T.pdf
- Description:
- IC BUFFER 2 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,632
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Product details
Overview
MAX4387EUA+T from Maxim Integrated is a dual, high-speed, current-feedback ADC buffer amplifier optimized for +5V operation with fixed gain of +5V/V. It delivers 150MHz -3dB bandwidth, 350V/µs slew rate, and 88dBc SFDR at 5MHz - enabling precise drive of high-resolution, high-sample-rate analog-to-digital converters in instrumentation and communications systems.
For engineers reviewing the MAX4387EUA+T datasheet, MAX4387EUA+T pinout, MAX4387EUA+T application, or MAX4387EUA+T equivalent, key selection criteria include its dual-channel configuration, non-unity-gain stability (AV ≥ +5V/V), absence of disable functionality, 8-pin µMAX package footprint, and performance under 3V/5V single-supply conditions.
Technical Context
The MAX4387EUA+T is a voltage-feedback op amp designed specifically as an ADC input buffer. It is internally compensated for stable operation only at closed-loop gains of +5V/V or higher - unlike unity-gain-stable variants such as MAX4287. Its input common-mode range extends to VEE (ground in single-supply use), supporting rail-to-rail input signal handling.
It draws 23mA quiescent supply current per amplifier at +5V, achieves 6ns settling time to 0.1%, and provides ±106mA sink / +77mA source output drive into low-impedance loads - critical for driving dynamic ADC input capacitance without distortion or settling error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (-3dB) | 150MHz at AV = +5V/V - supports accurate buffering of IF/RF signals up to ~75MHz Nyquist zone. |
| Slew Rate | 350V/µs - enables full-scale step response within <10ns for 1V steps, minimizing distortion in fast transient capture. |
| SFDR | 88dBc at fC = 5MHz - ensures >14-bit ENOB when driving high-performance ADCs like MAX157. |
| Supply Range | +2.85V to +6.5V single supply - compatible with standard 3.3V and 5V system rails without level-shifting. |
| Output Drive | ±106mA sink / +77mA source - directly drives 50Ω transmission lines or low-Z ADC inputs without external buffers. |
| Settling Time | 6ns to 0.1% - meets timing budgets for ≥160MSPS sampling systems with minimal acquisition window overhead. |
Pinout & Package
MAX4387EUA+T is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), thermally enhanced with exposed paddle. Pin 1 is marked by dot; device uses standard SOIC-compatible layout with 0.65mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INA–) | Inverting Input, Amplifier A | Differential input node for first amplifier channel; requires matched layout to INA+ for CMRR preservation. |
| 2 (INA+) | Noninverting Input, Amplifier A | Primary signal input for channel A; common-mode range extends to VEE (0V) for ground-referenced sources. |
| 3 (OUTA) | Output, Amplifier A | High-current output capable of driving 50Ω loads; place series resistor (20–30Ω) near pin for capacitive load stability. |
| 4 (VEE) | Negative Supply / Ground | Return path for both amplifiers; must connect to solid ground plane with low-inductance path to minimize PSRR degradation. |
| 5 (INB+) | Noninverting Input, Amplifier B | Second independent input channel; electrically isolated from channel A except via shared VEE/VCC. |
| 6 (INB–) | Inverting Input, Amplifier B | Complementary input for channel B; identical electrical specs to INA–; layout symmetry critical for crosstalk control. |
| 7 (OUTB) | Output, Amplifier B | Independent high-drive output; crosstalk to OUTA is –85dBc at 10MHz - suitable for dual-channel simultaneous sampling. |
| 8 (VCC) | Positive Supply | +2.85V to +6.5V input; bypass with 0.1nF ceramic + 0.1µF tantalum directly at pin to suppress HF noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Non-unity-gain compensation | Stable only at AV ≥ +5V/V - eliminates need for external compensation while maximizing bandwidth-efficiency trade-off. |
| Input CMVR to VEE | Supports DC-coupled, ground-referenced sensor interfaces (e.g., CCD, ultrasound transducer outputs) without level shifters. |
| Low 2pF input capacitance | Minimizes interaction with PCB trace capacitance, preserving phase margin and reducing peaking in high-Z feedback networks. |
| High PSRR (50dB) | Maintains signal integrity in noisy mixed-signal environments - critical when sharing power rails with digital ASICs or FPGAs. |
| Low 10nV/√Hz input voltage noise | Preserves SNR in wideband front-ends where amplifier noise dominates over thermal noise of source impedance. |
Applications
| High-Speed Data Acquisition | Communications Baseband Processing |
|---|---|
Use Scenario: Simultaneous sampling of dual-channel RF downconverters feeding a 16-bit, 100MSPS ADC in a software-defined radio receiver. IC Role / Device Role / Timing Role: Dual-channel ADC driver providing matched gain, phase, and settling across I/Q paths to preserve image rejection and EVM. Use Value: 6ns settling and –85dBc crosstalk ensure <0.05° phase mismatch and <–75dBc IMD3 at 20MHz offset - meeting LTE-A ACLR requirements. | Use Scenario: Driving differential inputs of a pipeline ADC in a broadband DOCSIS 3.1 cable modem upstream channel analyzer. IC Role / Device Role / Timing Role: High-current, low-distortion buffer isolating FPGA-based digital front-end from analog signal chain during burst-mode transmission. Use Value: ±106mA output drive sustains 1.2Vpp into 50Ω load at 60MHz while maintaining 86dBc SFDR - enabling >12ENOB at 80MSPS. |
| Ultrasound Beamforming | High-Precision Instrumentation |
Use Scenario: Channel-wise analog signal conditioning in a 128-element portable ultrasound probe, preceding multiplexed ADC conversion. IC Role / Device Role / Timing Role: Low-noise, fast-settling buffer for echo return signals with variable gain amplification prior to digitization. Use Value: 10nV/√Hz input noise and 150MHz bandwidth support detection of weak echoes (<–90dBFS) with ≤1.5ns time-of-flight jitter. | Use Scenario: Front-end conditioning for a 24-bit delta-sigma ADC in a portable multimeter measuring AC RMS with 0.01% accuracy. IC Role / Device Role / Timing Role: Precision gain stage and anti-alias filter driver ensuring flat frequency response and minimal harmonic distortion below 100kHz. Use Value: 0.1dB flatness to 75MHz and 88dBc SFDR at 5MHz enable true 118dB SNR performance across full audio band. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ADC buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4287EUA+ | Unity-gain stable; 250MHz bandwidth; same 8-pin µMAX package; no disable function. | Preferred for variable-gain or unity-gain configurations (e.g., active filters, photodiode TIA stages). | Select MAX4287EUA+ when gain flexibility or wider bandwidth at AV = +1V/V is required; not drop-in for +5V/V fixed-gain designs. |
| AD8021ARMZ | Voltage-feedback, unity-gain stable; 200MHz bandwidth; 8-pin MSOP; 1.6mA lower IQ; no disable. | Better DC precision (0.3mV VOS) but lower SFDR (82dBc @ 5MHz); suited for medium-speed precision DAQ. | Choose AD8021ARMZ for lower power and tighter DC specs in sub-50MSPS systems where SFDR >85dBc is not mandatory. |
Compared with MAX4287EUA+, the MAX4387EUA+ trades unity-gain stability for higher large-signal bandwidth at +5V/V - making it superior for fixed-gain ADC driving, while AD8021ARMZ offers better DC accuracy and lower power at the expense of dynamic performance.
Availability
MAX4387EUA+T is available at Aetrix Electronics and suitable for high-speed data acquisition, communications baseband processing, and ultrasound beamforming requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for MAX4387EUA+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 semiconductor company specializing in high-performance analog and mixed-signal ICs for industrial, communications, and consumer applications.
The MAX4285–MAX4388 family was engineered to solve ADC input drive challenges - delivering high speed, low distortion, and robust output drive in compact packages for space-constrained, high-density PCB layouts.
FAQ
What is the minimum stable gain for the MAX4387EUA+T?
The MAX4387EUA+T is internally compensated for stable operation only at closed-loop gains of +5V/V or greater. Attempting to use it at unity gain or lower will result in oscillation or excessive ringing due to insufficient phase margin. This distinguishes it from the unity-gain-stable MAX4287EUA+, which shares the same package and pinout but different compensation.
Does the MAX4387EUA+T have a disable function?
No, the MAX4387EUA+T does not include a disable feature. Unlike the MAX4388EUA+T (which has dual DISABLEA/DISABLEB pins) or the MAX4285/MAX4286 (with single DISABLE), the MAX4387EUA+T operates continuously. Its quiescent current remains fixed at 23mA per amplifier at +5V - making it unsuitable for power-gated multiplexing applications.
What is the recommended power-supply bypassing for MAX4387EUA+T?
For optimal high-frequency performance, bypass VCC (pin 8) with a 0.1nF ceramic capacitor placed within 2mm of the pin, plus a 0.1µF bulk capacitor nearby. VEE (pin 4) must connect directly to a solid ground plane using multiple vias. Avoid daisy-chained grounds or long traces - these degrade PSRR and increase susceptibility to switching noise from adjacent digital circuits.
Can MAX4387EUA+T drive a 50Ω transmission line directly?
Yes, the MAX4387EUA+T can drive a 50Ω load directly: its ±106mA sink and +77mA source capability exceeds the 20mA required for 1Vpp into 50Ω. However, always place a 20Ω to 30Ω series resistor immediately at the output pin (OUTA or OUTB) to isolate reactive board capacitance and prevent instability - especially with longer traces or connectors.
What is the input common-mode voltage range of MAX4387EUA+T?
The input common-mode voltage range of MAX4387EUA+T extends from VEE to VCC – 1.25V. With VEE = 0V (single-supply mode), this means inputs can swing from 0V up to +3.75V when VCC = +5V - fully accommodating ground-referenced signals and enabling DC-coupled interface to sensors, mixers, or DAC outputs without level-shifting circuitry.
MAX4387EUA+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:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Buffer, Voltage Feedback
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 385V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 130 MHz
- Current - Input Bias:
- 13 µA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 23mA (x2 Channels)
- 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:
- 8-uMAX/uSOP
MAX4387EUA+T FAQ
1.How can I place an order for MAX4387EUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4387EUA+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 MAX4387EUA+T reliable?
The price and inventory of MAX4387EUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4387EUA+T is usually 5 days.
3.What payment methods are accepted for MAX4387EUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4387EUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4387EUA+T?
MAX4387EUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4387EUA+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 MAX4387EUA+T?
For technical support, including MAX4387EUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4387EUA+T requirements.
6.How does Aetrix verify that MAX4387EUA+T is sourced from the original manufacturer or authorized distributors?
All MAX4387EUA+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 MAX4387EUA+T meets industry standards.
7.What is the process for return or replacement of MAX4387EUA+T?
All MAX4387EUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4387EUA+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 MAX4387EUA+T part is unused and in its original packaging.
Return procedure for MAX4387EUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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