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Analog Devices Inc./Maxim Integrated MAX4387EUA
- Part No.:
- MAX4387EUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4387EUA.pdf
- Description:
- IC BUFFER 2 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,274
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Product details
Overview
MAX4387EUA from Maxim Integrated is a dual, high-speed, unity-gain stable voltage-feedback operational amplifier optimized as an ADC buffer driver. It operates from a single +2.85V to +6.5V supply, delivers 150MHz -3dB bandwidth (at AV = +5V/V), 350V/µs slew rate, and achieves 88dBc SFDR at 5MHz - enabling high-fidelity signal conditioning for 12–14-bit, 40+ MSPS analog-to-digital converters in communications and medical ultrasound front-ends.
For engineers reviewing the MAX4387EUA datasheet, MAX4387EUA pinout, MAX4387EUA application, or MAX4387EUA equivalent, this page provides verified circuit role, package mapping (8-pin µMAX), disable timing (40ns enable / 50ns disable), output drive (±77mA/±106mA), and validated alternative options for ADC input buffering in space-constrained, high-dynamic-range systems.
Technical Context
The MAX4387EUA is a dual-channel op amp with internal compensation for stable operation at minimum gain of +5V/V. Its voltage-feedback architecture supports fast settling (6ns to 0.1%) and low distortion across wide load ranges (100Ω to 1kΩ), while maintaining 85dBc crosstalk suppression at 10MHz between channels.
It features active-low disable control per channel (DISABLEA/DISABLEB), placing outputs in high-impedance state (typ. 35kΩ) with quiescent current reduced to 1mA per amplifier. Input common-mode range extends to VEE (ground in single-supply mode), supporting rail-to-rail input signal acquisition prior to ADC sampling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| -3dB Bandwidth | 150MHz at AV = +5V/V - sufficient for driving 12-bit ADCs sampling up to 40MSPS without gain peaking or phase error degradation. |
| Slew Rate | 350V/µs - enables full-scale step response within 1.4ns for 500mV output swing, critical for transient fidelity in pulse-based instrumentation. |
| SFDR @ 5MHz | 88dBc - ensures spurious-free resolution >14.6 ENOB for baseband signal chains in CCD imaging and ultrasound beamforming. |
| Output Drive | +77mA source / −106mA sink - directly drives 300Ω ADC input termination without external buffers, reducing BOM count and layout area. |
| Enable/Disable Time | 40ns enable / 50ns disable - supports time-multiplexed multi-channel ADC architectures with sub-100ns channel switching latency. |
| Input Voltage Range | VEE to VCC − 1.25V - accommodates ground-referenced sensor signals and allows DC-coupled interfacing to single-supply ADCs. |
| Quiescent Current | 24mA per amplifier (normal mode), 1mA (disabled) - enables dynamic power gating in battery-powered portable test equipment. |
Pinout & Package
MAX4387EUA is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), thermally enhanced with exposed paddle for improved power dissipation in high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - INA− | Inverting input, Channel A | Accepts differential or single-ended feedback; requires matched trace length to INA+ for optimal CMRR above 10MHz. |
| 2 - INA+ | Noninverting input, Channel A | DC-coupled input node; common-mode range includes VEE, enabling ground-referenced sensor interface. |
| 3 - VEE | Negative supply / Ground | Must be connected to low-impedance ground plane; shared return path for both amplifiers and ADC reference. |
| 4 - DISABLEA | Active-low disable, Channel A | Pulled high (≥VCC − 1V) for normal operation; driven low to place OUTA in 35kΩ high-Z state. |
| 5 - OUTA | Output, Channel A | Capable of ±106mA drive into 20Ω loads; requires 20–30Ω series isolation resistor when driving >5pF capacitive loads. |
| 6 - OUTB | Output, Channel B | Independent output with identical drive capability; crosstalk <−85dBc at 10MHz enables simultaneous dual-channel sampling. |
| 7 - INB+ | Noninverting input, Channel B | Functionally identical to INA+; layout symmetry critical to match propagation delay between channels. |
| 8 - INB− | Inverting input, Channel B | Paired with INB+ for differential configuration; pin 1 and pin 8 must maintain equal trace impedance for balanced noise rejection. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain unstable, +5V/V compensated | Guarantees stability with ≥5V/V closed-loop gain, eliminating need for external compensation in gain-of-5 ADC driver configurations. |
| High-output-impedance disable mode | 35kΩ typical output impedance during disable - enables clean channel multiplexing without signal contention or loading effects. |
| Low 2pF input capacitance | Minimizes interaction with PCB trace capacitance, preserving bandwidth when routing long traces to remote ADC inputs. |
| 85dBc crosstalk at 10MHz | Prevents inter-channel interference in dual-sampling applications such as I/Q demodulation or stereo ultrasound receive paths. |
| −106mA/−77mA output asymmetry | Optimized sink strength supports heavy capacitive loading during falling edges, improving settling in asymmetric ADC input networks. |
Applications
| Communications Baseband Receiver | Ultrasound Beamformer Front-End |
|---|---|
|
Use Scenario: Conditioning I/Q analog signals from RF downconverters before digitization in LTE/5G small-cell receivers. IC Role / Device Role / Timing Role: Dual-channel ADC driver providing matched gain, phase, and settling for simultaneous I/Q sampling at 65MSPS. Use Value: 150MHz bandwidth and 88dBc SFDR preserve EVM <1.5% at 20MHz channel bandwidth; disable pins enable TDD mode power gating. |
Use Scenario: Amplifying echo signals from 128-element transducer arrays in portable ultrasound systems. IC Role / Device Role / Timing Role: Low-noise, high-drive buffer isolating multiplexed transducer elements from ADC input capacitance. Use Value: 35kΩ disabled output impedance prevents crosstalk between adjacent channels; 6ns settling supports 100MHz sampling for 15cm depth imaging. |
| High-Speed Data Acquisition System | CCD Imaging Signal Chain |
|
Use Scenario: Driving dual 14-bit, 40MSPS ADCs in automated test equipment capturing transient waveforms. IC Role / Device Role / Timing Role: Precision buffer delivering full-scale 2Vpp signals with <0.01% harmonic distortion at 5MHz. Use Value: 88dBc SFDR ensures >14.6 ENOB; ±106mA sink current handles fast ADC input current spikes without droop. |
Use Scenario: Buffering pixel charge outputs from linear CCD sensors in industrial inspection cameras. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail input amplifier converting photodiode current to voltage prior to correlated double sampling. Use Value: Input common-mode range to VEE enables direct connection to CCD's grounded cathode; 10nV/√Hz noise preserves SNR in low-light conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4287EUA | 250MHz bandwidth at AV = +1V/V; unity-gain stable; no disable function. | Better suited for unity-gain ADC drivers where disable is unnecessary and higher bandwidth is required. | Select MAX4287EUA when system requires maximum small-signal bandwidth and does not require channel gating. |
| ADA4897-2ARMZ | 210MHz bandwidth, 280V/µs slew rate, 1.2nV/√Hz voltage noise; no disable pin; SOIC-8 package. | Lower noise and higher precision, but lacks high-Z disable and uses larger SOIC-8 footprint. | Choose ADA4897-2ARMZ for low-noise instrumentation where disable functionality is not needed and board area permits SOIC-8. |
Compared with MAX4387EUA, MAX4287EUA offers higher bandwidth but no disable capability, while ADA4897-2ARMZ provides lower noise and better dc precision at the cost of missing channel-level power control and requiring larger PCB real estate.
Availability
MAX4387EUA is available at Aetrix Electronics and suitable for high-speed data acquisition, ultrasound imaging, and communications baseband receiver designs requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for MAX4387EUA 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, mixed-signal, and power management ICs for demanding signal-chain applications.
The MAX4285–MAX4388 family was designed specifically for high-dynamic-range ADC driver applications, balancing speed, linearity, power efficiency, and integration in compact packages for portable and high-channel-count systems.
FAQ
What is the minimum recommended gain for stable operation of the MAX4387EUA?
The MAX4387EUA is internally compensated for stable operation at a minimum closed-loop gain of +5V/V. Operating at gains below +5V/V may result in peaking, overshoot, or oscillation due to insufficient phase margin. For unity-gain or lower-gain applications, consider the MAX4287EUA instead, which is unity-gain stable. Always verify stability under actual load conditions using the recommended 20–30Ω isolation resistor on the output.
Does the MAX4387EUA support single-supply operation with ground-referenced inputs?
Yes, the MAX4387EUA supports true single-supply operation with input common-mode voltage range extending to VEE (ground). This allows direct interfacing with ground-referenced sensors or DAC outputs without level-shifting circuitry. The output swing is specified from VEE + 0.4V to VCC − 0.4V, making it compatible with most 3V or 5V single-supply ADCs that accept rail-to-rail input signals.
What is the purpose of the DISABLEA and DISABLEB pins on the MAX4387EUA?
The DISABLEA and DISABLEB pins are active-low logic inputs that independently place each amplifier's output into a high-impedance state (typ. 35kΩ) while reducing quiescent current to 1mA per channel. This enables time-multiplexed use of a single ADC input by multiple signal sources, eliminates channel crosstalk during idle periods, and reduces system power in TDD or burst-mode applications. Both pins must be pulled high (≥VCC − 1V) for normal operation.
Can the MAX4387EUA drive a 300Ω ADC input directly without external components?
Yes, the MAX4387EUA is rated for ±77mA source and ±106mA sink current into resistive loads, making it capable of directly driving standard 300Ω ADC input terminations. However, when driving reactive loads (e.g., ADC input capacitance >5pF), a 20–30Ω series isolation resistor is recommended at the output to maintain stability and minimize ringing, as confirmed in the device's "Output Capacitive Loading and Stability" section.
How does the MAX4387EUA compare to the MAX4287EUA in terms of bandwidth and disable functionality?
The MAX4387EUA offers 150MHz −3dB bandwidth at AV = +5V/V and includes independent DISABLEA/DISABLEB pins for channel-level power gating. In contrast, the MAX4287EUA provides 250MHz bandwidth at AV = +1V/V but has no disable function and is unity-gain stable. Thus, MAX4387EUA prioritizes controlled power efficiency in gain-of-5 ADC driver roles, while MAX4287EUA targets maximum bandwidth in unity-gain configurations.
MAX4387EUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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
- 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 FAQ
1.How can I place an order for MAX4387EUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4387EUA 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 reliable?
The price and inventory of MAX4387EUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4387EUA is usually 5 days.
3.What payment methods are accepted for MAX4387EUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4387EUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4387EUA?
MAX4387EUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4387EUA 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?
For technical support, including MAX4387EUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4387EUA requirements.
6.How does Aetrix verify that MAX4387EUA is sourced from the original manufacturer or authorized distributors?
All MAX4387EUA 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 meets industry standards.
7.What is the process for return or replacement of MAX4387EUA?
All MAX4387EUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4387EUA, 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 part is unused and in its original packaging.
Return procedure for MAX4387EUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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