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Analog Devices Inc./Maxim Integrated MAX4431EUK
- Part No.:
- MAX4431EUK
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4431EUK.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:473
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Product details
Overview
MAX4431EUK from Maxim Integrated is a single, dual-supply, voltage-feedback operational amplifier optimized for high-speed 14- and 16-bit ADC driving applications. It features +2V/V minimum stable gain, 215MHz small-signal -3dB bandwidth, 145V/µs slew rate, 63ns 16-bit (0.0015%) settling time, and 2.8nV/√Hz input voltage noise density. Its 5-pin SOT23 package supports space-constrained signal-chain front-ends.
For engineers reviewing the MAX4431EUK datasheet, MAX4431EUK pinout, MAX4431EUK application, or MAX4431EUK equivalent, key selection criteria include closed-loop gain stability at +2V/V, 4Vp-p output swing into ≥500Ω loads, 100dB SFDR at 1MHz, low 11mA quiescent current per amplifier, and compatibility with fast-switching capacitive ADC inputs.
Technical Context
The MAX4431EUK employs a voltage-feedback architecture with internal compensation for closed-loop gains of +2V/V or greater-distinct from unity-gain-stable MAX4430/MAX4432 variants. Its 215MHz bandwidth and 145V/µs slew rate enable accurate amplification of wideband IF/RF signals up to ~20MHz without distortion-induced harmonic folding.
Designed for dual-supply operation (±4.5V to ±5.5V), it delivers rail-to-rail-capable output swing (VEE + 2.6V to VCC – 0.6V at 500Ω) and 60mA output drive, supporting direct interface to modern high-resolution ADCs requiring ≥4Vp-p dynamic range and low glitch energy during acquisition cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal -3dB Bandwidth | 215MHz at AVCL = +2V/V - enables clean amplification of signals up to Nyquist frequency of 100+ MSPS ADCs |
| Settling Time to 16 Bit | 63ns (0.0015%) for 0–4V step - ensures full accuracy before ADC sampling aperture closes |
| Slew Rate | 145V/µs - supports large-signal fidelity without slewing-induced distortion in fast transient events |
| Input Voltage Noise Density | 2.8nV/√Hz at 100kHz - preserves SNR in low-level preamplifier stages feeding 16-bit converters |
| Spurious-Free Dynamic Range | 100dBc at 1MHz, 4Vp-p output - minimizes harmonic interference in sensitive receiver IF chains |
| Quiescent Supply Current | 11mA per amplifier - balances high-speed performance with power efficiency in multi-channel systems |
| Open-Loop Gain | 110dB (min) - provides sufficient loop gain for precision DC-coupled gain configurations |
Pinout & Package
MAX4431EUK is housed in a 5-pin SOT23 package (JEDEC MO-178AA), with exposed pad not internally connected. The compact 2.9mm × 1.6mm footprint supports high-density PCB layouts in portable and instrumentation designs.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output node - capable of sourcing/sinking ±60mA, drives ADC input directly with minimal external components |
| 2 | VEE | Negative supply terminal - must be decoupled to ground with ≤1nF ceramic capacitor placed within 2mm of pin |
| 3 | IN+ | Noninverting input - high-impedance (1MΩ common-mode, 12kΩ differential) node for precision signal routing |
| 4 | IN− | Inverting input - matched to IN+ for optimal CMRR; requires symmetrical layout and termination for stability at high gain |
| 5 | VCC | Positive supply terminal - requires local 0.1µF ceramic bypass to ground; shared supply rails demand careful sequencing in multi-amplifier systems |
Key Features
| Feature | Design Value |
|---|---|
| 16-bit accurate settling | 63ns to 0.0015% for 0–4V step - eliminates timing margin uncertainty in sub-100ns ADC sampling windows |
| High-output drive capability | ±60mA into 500Ω - sustains full 4Vp-p swing while driving typical switched-capacitor ADC input impedance |
| Low distortion at high frequency | 100dB SFDR at 1MHz - prevents harmonic aliasing into baseband during undersampling architectures |
| Wide output voltage swing | VEE + 2.6V to VCC – 0.6V (RL = 500Ω) - matches input range of 14-/16-bit ADCs without level-shifting circuitry |
| Stable at AVCL ≥ +2V/V | No external compensation required for noninverting gain ≥2 - simplifies design of fixed-gain IF amplifiers and active filters |
Applications
| High-Speed ADC Preamplifier | IF Amplifier |
|---|---|
Use Scenario: Driving the analog input of a 100MSPS 16-bit pipeline ADC in a software-defined radio receiver. IC Role / Device Role / Timing Role: High-fidelity buffer and gain stage that settles within 63ns to preserve 16-bit linearity prior to sampling aperture closure. Use Value: Enables full ENOB utilization by maintaining <0.0015% error during acquisition, avoiding gain/offset drift from thermal effects in slower op amps. |
Use Scenario: Amplifying 70MHz IF signal from mixer output before digitization in a cellular base station transceiver. IC Role / Device Role / Timing Role: Low-noise, low-distortion voltage-feedback amplifier operating at fixed +2V/V gain with 215MHz bandwidth. Use Value: Delivers 100dB SFDR at 1MHz offset, suppressing intermodulation products that would otherwise fold into adjacent channels during ADC sampling. |
| Low-Distortion Active Filter | Precision Instrumentation Front-End |
Use Scenario: Implementing a 4th-order Butterworth bandpass filter centered at 25MHz for EMI-sensitive medical imaging sensor conditioning. IC Role / Device Role / Timing Role: Unity-gain-stable variant not applicable; MAX4431EUK used in +2V/V gain sections of cascaded filter topology. Use Value: Maintains flat group delay and <0.1dB passband ripple up to 20MHz due to 145V/µs slew rate and 215MHz bandwidth. |
Use Scenario: Conditioning low-amplitude thermocouple or strain gauge signals in a portable data logger with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Precision noninverting amplifier with matched input resistors, leveraging 110dB min open-loop gain for <1ppm gain error. Use Value: Achieves 2.8nV/√Hz input noise and 7µV/°C offset drift - critical for resolving µV-level signals across industrial temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, low-distortion op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8009ARZ | Unity-gain stable; 1GHz bandwidth; 5,500V/µs slew rate; higher 17mA supply current | Better suited for >100MHz small-signal amplification but less optimized for 4Vp-p ADC driving due to lower output drive (±45mA) | Select AD8009ARZ when bandwidth >500MHz is required and load is resistive; MAX4431EUK preferred for cost-sensitive, power-constrained ADC driver roles |
| THS3201DGN | Current-feedback architecture; 1.8GHz bandwidth; 6,000V/µs slew rate; requires external feedback resistor network | Superior high-frequency pulse fidelity but demands careful layout and lacks integrated gain stability - no internal compensation | Choose THS3201DGN only for ultra-wideband (>500MHz) applications where layout expertise and board area permit discrete feedback tuning |
Compared with AD8009ARZ and THS3201DGN, the MAX4431EUK offers a balanced trade-off: guaranteed +2V/V stability without external components, 60mA output drive tailored for ADC loads, and 11mA quiescent current enabling multi-channel integration without thermal derating.
Availability
MAX4431EUK is available at Aetrix Electronics and suitable for high-speed data acquisition, RF receiver front-ends, and precision instrumentation requiring stable component supply across extended temperature ranges (-40°C to +85°C).
Supply support for MAX4431EUK 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 computing applications.
The MAX4430–MAX4433 family was engineered specifically for high-fidelity signal conditioning in high-speed data conversion systems-emphasizing low noise, fast settling, and robust drive capability into dynamic ADC inputs.
FAQ
What is the minimum stable gain configuration for MAX4431EUK?
The MAX4431EUK is internally compensated for closed-loop gains of +2V/V or greater. It is not unity-gain stable; using it in a gain-of-1 configuration may cause oscillation. For unity-gain applications, the MAX4430EUK is the appropriate variant. Always verify stability with actual load conditions and PCB parasitics during prototype validation.
Can MAX4431EUK drive a 100Ω load while maintaining 4Vp-p output swing?
No. The MAX4431EUK specifies ±60mA output current into 500Ω loads, yielding a 4Vp-p swing. Driving 100Ω would require ±20mA for 2Vp-p, but output voltage swing degrades significantly below 500Ω due to internal resistance and thermal limits. For 100Ω loads, consider buffer amplifiers or parallel-output configurations.
Does MAX4431EUK support single-supply operation?
No. MAX4431EUK is specified for dual-supply operation only, with absolute maximum ratings of ±5.5V and recommended operating range of ±4.5V to ±5.5V. Its input common-mode range (VEE + 2.5V to VCC – 0.9V) and output swing (VEE + 2.6V to VCC – 0.6V) assume symmetric rails. Single-supply use violates datasheet specifications and risks parametric failure.
What is the maximum capacitive load the MAX4431EUK can drive without instability?
The MAX4431EUK remains stable with up to 47pF capacitive load without sustained oscillations. Beyond this, output ringing increases due to phase-margin reduction. For larger loads (e.g., ADC input capacitance >10pF plus trace capacitance), add a 5Ω–50Ω isolation resistor in series with the output to restore stability-accepting minor gain error and reduced bandwidth.
How does the 63ns settling time of MAX4431EUK compare to the MAX4430EUK?
The MAX4431EUK achieves 63ns 16-bit settling for a 0–4V step, whereas the unity-gain-stable MAX4430EUK settles in 37ns under identical conditions. This difference arises from the MAX4431EUK's higher bandwidth (215MHz vs. 180MHz) and optimized compensation for higher closed-loop gain, trading raw speed for stability margin at AVCL ≥ +2V/V.
MAX4431EUK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 145V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 215 MHz
- Current - Input Bias:
- 11 µA
- Voltage - Input Offset:
- 1.25 mV
- Current - Supply:
- 11mA
- Current - Output / Channel:
- 60 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:
- SOT-23-5
MAX4431EUK FAQ
1.How can I place an order for MAX4431EUK through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4431EUK 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 MAX4431EUK reliable?
The price and inventory of MAX4431EUK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4431EUK is usually 5 days.
3.What payment methods are accepted for MAX4431EUK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4431EUK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4431EUK?
MAX4431EUK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4431EUK 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 MAX4431EUK?
For technical support, including MAX4431EUK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4431EUK requirements.
6.How does Aetrix verify that MAX4431EUK is sourced from the original manufacturer or authorized distributors?
All MAX4431EUK 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 MAX4431EUK meets industry standards.
7.What is the process for return or replacement of MAX4431EUK?
All MAX4431EUK units undergo pre-shipment inspection (PSI). If there is an issue with MAX4431EUK, 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 MAX4431EUK part is unused and in its original packaging.
Return procedure for MAX4431EUK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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