My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX4431EUK+T
- Part No.:
- MAX4431EUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4431EUK+T.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,756
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX4431EUK+T from Maxim Integrated is a single, dual-supply, voltage-feedback operational amplifier optimized for high-speed, low-distortion ADC driving applications. It features +2V/V minimum stable gain, 215MHz small-signal -3dB bandwidth, 145V/µs slew rate, and 63ns 16-bit (0.0015%) settling time. Designed for precision signal conditioning in 14- and 16-bit data acquisition systems, it delivers 4Vp-p output swing into ≥500Ω loads with 100dB SFDR at 1MHz.
For engineers reviewing the MAX4431EUK+T datasheet, MAX4431EUK+T pinout, MAX4431EUK+T application, or MAX4431EUK+T equivalent, this page provides verified technical context, real-world design meaning of key specs, validated SOT23-5 pin functions, application-specific implementation guidance, and two confirmed alternative op amps with documented functional trade-offs.
Technical Context
The MAX4431EUK+T uses a voltage-feedback architecture internally compensated for closed-loop gains ≥+2V/V, enabling stable operation in noninverting configurations with gain-setting resistors ≥500Ω. Its 215MHz bandwidth and 145V/µs slew rate support fast transient response for sampling rates up to ~100MSPS when driving capacitive ADC inputs.
It achieves 100dB spurious-free dynamic range at 1MHz with 4Vp-p output while maintaining ultra-low 2.8nV/√Hz input voltage noise density and 110dB minimum open-loop gain - critical for preserving SNR in high-resolution analog front-ends. The device operates from ±4.5V to ±5.5V dual supplies and draws only 11mA per amplifier.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal -3dB BW | 215MHz at AVCL = +2 - enables accurate amplification of signals up to ~70MHz fundamental with ≤0.1dB gain flatness. |
| Settling time (16-bit) | 63ns to 0.0015% with 0–4V step - ensures full resolution capture before next ADC sample clock edge. |
| Slew rate | 145V/µs - supports clean reproduction of fast-rising 4Vp-p signals without slewing-induced distortion. |
| Input voltage noise | 2.8nV/√Hz at 100kHz - contributes <0.5 LSB noise in 16-bit, 1MHz-bandwidth systems with 4V full-scale. |
| Open-loop gain | 110dB min - provides ≥90dB loop gain at 100kHz, ensuring precise DC accuracy and linearity in closed-loop gain ≥+2. |
| Output drive | ±60mA into 20Ω - sustains 4Vp-p swing into heavy loads like ADC input RC networks or transmission lines. |
| Supply current | 11mA per amplifier - balances speed and power for portable or thermally constrained high-speed DAQ systems. |
Pinout & Package
MAX4431EUK+T is housed in a 5-pin SOT23-5 package with exposed pad (not electrically connected), optimized for high-frequency layout and thermal performance in space-constrained PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers rail-to-rail capable output swing; requires series isolation resistor (≤10Ω) when driving >15pF capacitive loads to maintain stability. |
| 2 (VEE) | Negative supply | Connect directly to low-impedance ground plane; bypass with 0.1µF ceramic capacitor placed within 2mm of pin. |
| 3 (IN+) | Noninverting input | High-impedance node (1MΩ typical); match DC resistance seen by IN− to minimize offset drift from bias current. |
| 4 (IN−) | Inverting input | Accepts feedback network; RS resistor must be ≤500Ω to preserve phase margin in +2V/V configuration. |
| 5 (VCC) | Positive supply | Connect to clean +5V (±0.5V); bypass identically to VEE with 0.1µF ceramic and remote 10µF tantalum. |
Key Features
| Feature | Design Value |
|---|---|
| +2V/V minimum stable gain | Enables robust noninverting configurations without external compensation, reducing component count vs. unity-gain-stable alternatives. |
| 100dB SFDR at 1MHz, 4Vp-p | Preserves ENOB >15.5 bits in 16-bit ADC interfaces, eliminating need for post-amplifier filtering in wideband receivers. |
| 63ns 16-bit settling | Supports sampling intervals down to 100ns, enabling direct interface to 10MSPS+ successive-approximation ADCs without hold-time violation. |
| 2.8nV/√Hz input voltage noise | Limits integrated input-referred noise to <12µVRMS over 1MHz bandwidth, avoiding SNR degradation in low-level sensor signal chains. |
| ±60mA output drive | Drives 50Ω coaxial cables or 20Ω ADC input termination resistors while maintaining 4Vp-p swing, simplifying inter-stage matching. |
Applications
| High-Speed ADC Preamplifier | IF Amplifier |
|---|---|
Use Scenario: Driving the analog input of a 16-bit, 100MSPS 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 accuracy across full 4Vp-p input range. Use Value: Eliminates need for external passive filtering or additional amplification stages, reducing BOM count and board area while maintaining SFDR >100dB. |
Use Scenario: Amplifying 70MHz IF signals in a cellular base station transceiver before digitization. IC Role / Device Role / Timing Role: Low-distortion, wideband gain block operating at +2V/V with minimal group delay variation across 50–100MHz band. Use Value: Delivers 215MHz bandwidth and 100dB SFDR to preserve adjacent-channel rejection without requiring harmonic suppression filters. |
| Low-Distortion Active Filter | Precision Instrumentation Front-End |
Use Scenario: Implementing a 4th-order Butterworth anti-aliasing filter preceding a 14-bit SAR ADC in automated test equipment. IC Role / Device Role / Timing Role: Unity-gain stable op amp replaced by +2V/V-configured MAX4431EUK+T to improve stopband attenuation and reduce passband ripple. Use Value: Achieves <−80dB THD+N at 1MHz with 2Vp-p output, enabling filter cutoff sharpness unattainable with lower-bandwidth op amps. |
Use Scenario: Conditioning low-amplitude thermocouple or strain gauge signals in a medical patient monitor with 16-bit resolution requirement. IC Role / Device Role / Timing Role: First-stage gain amplifier with 2.8nV/√Hz noise density and 110dB open-loop gain to maximize dynamic range before programmable gain stage. Use Value: Contributes <0.4 LSB total input-referred noise over 10Hz–100kHz, meeting IEC 60601-2-27 ECG signal fidelity requirements. |
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 BW but higher 4.5nV/√Hz noise and 125mA quiescent current. | Better for wideband RF gain blocks where speed dominates noise; less suitable for battery-powered 16-bit ADC drivers. | Select AD8009ARZ only when ≥500MHz bandwidth is required and power budget allows >100mA per channel. |
| LMH6629MA/NOPB | +5V/V minimum stable gain; 880MHz BW; 1.9nV/√Hz noise; requires external compensation network. | Superior noise performance for ultra-low-level signals, but gain inflexibility limits use in variable-gain ADC interfaces. | Choose LMH6629MA/NOPB when 16-bit ENOB must be maintained at sub-1Vp-p levels and system gain is fixed at ≥+5V/V. |
Compared with AD8009ARZ and LMH6629MA/NOPB, the MAX4431EUK+T offers optimal balance of 215MHz bandwidth, +2V/V minimum gain flexibility, 2.8nV/√Hz noise, and 11mA supply current - making it uniquely suited for cost- and power-sensitive 14-/16-bit ADC driver designs requiring rapid settling and high SFDR without external compensation.
Availability
MAX4431EUK+T is available at Aetrix Electronics and suitable for high-speed data acquisition, precision instrumentation, and communications infrastructure requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MAX4431EUK+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, medical, and communications applications.
The MAX4430–MAX4433 family was developed specifically to replace current-feedback amplifiers in high-resolution ADC driver roles, delivering voltage-feedback simplicity with ultra-low distortion and sub-100ns 16-bit settling.
FAQ
What is the minimum stable closed-loop gain for MAX4431EUK+T?
The MAX4431EUK+T is internally compensated for closed-loop gains of +2V/V or greater. It is not unity-gain stable. Attempting to use it in a +1V/V configuration may cause oscillation or excessive overshoot. For unity-gain applications, the pin-compatible MAX4430EUK+T is specified with 180MHz bandwidth and 37ns settling.
Can MAX4431EUK+T drive a 50Ω transmission line directly?
Yes - the MAX4431EUK+T delivers ±60mA output current and supports 4Vp-p swing into 20Ω loads. When driving a 50Ω line, configure it in a +2V/V noninverting setup with proper source termination and use a series 22Ω resistor at the output to isolate reactive load effects and maintain stability per layout guidelines in the datasheet.
What is the maximum capacitive load the MAX4431EUK+T can drive without instability?
The MAX4431EUK+T remains stable with up to 15pF capacitive load when properly bypassed and laid out. For loads >15pF (e.g., ADC input capacitance + PCB trace), add a 5–10Ω isolation resistor in series with the output. This preserves phase margin while introducing negligible gain error (<0.5%) at +2V/V gain.
Does MAX4431EUK+T support single-supply operation?
No - the MAX4431EUK+T is designed exclusively for dual-supply operation from ±4.5V to ±5.5V. Its input common-mode range extends to VEE + 2.5V and VCC − 0.9V, and output swing reaches within 0.6V of each rail. Single-supply use violates absolute maximum ratings and will damage the device.
How does the 63ns 16-bit settling time of MAX4431EUK+T impact ADC interface timing?
The 63ns 16-bit settling time of MAX4431EUK+T means the amplifier fully resolves to 0.0015% accuracy within 63ns after a 0–4V step. This allows reliable interfacing with 14-/16-bit ADCs having aperture times ≤50ns and sampling periods ≥100ns, ensuring no missing codes due to incomplete settling before sample-and-hold closure.
MAX4431EUK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Voltage Feedback
- 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+T FAQ
1.How can I place an order for MAX4431EUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4431EUK+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 MAX4431EUK+T reliable?
The price and inventory of MAX4431EUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4431EUK+T is usually 5 days.
3.What payment methods are accepted for MAX4431EUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4431EUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4431EUK+T?
MAX4431EUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4431EUK+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 MAX4431EUK+T?
For technical support, including MAX4431EUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4431EUK+T requirements.
6.How does Aetrix verify that MAX4431EUK+T is sourced from the original manufacturer or authorized distributors?
All MAX4431EUK+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 MAX4431EUK+T meets industry standards.
7.What is the process for return or replacement of MAX4431EUK+T?
All MAX4431EUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4431EUK+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 MAX4431EUK+T part is unused and in its original packaging.
Return procedure for MAX4431EUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4431EUK+T Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
