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Analog Devices Inc./Maxim Integrated MAX4431ESA
- Part No.:
- MAX4431ESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4431ESA.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,986
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Product details
Overview
MAX4431ESA 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 MAX4431ESA datasheet, MAX4431ESA pinout, MAX4431ESA application, or MAX4431ESA equivalent, key selection criteria include closed-loop gain stability requirement (+2V/V), bandwidth vs. settling trade-off versus the unity-gain-stable MAX4430ESA, output drive capability under capacitive load, and SO-8 package compatibility with board-level layout constraints for high-frequency analog signal paths.
Technical Context
The MAX4431ESA uses a voltage-feedback architecture with internal compensation tailored for closed-loop gains of +2V/V or greater-distinct from the unity-gain-stable MAX4430ESA. Its 215MHz bandwidth and 145V/µs slew rate enable accurate amplification of fast transient signals without slewing-induced distortion.
It achieves 100dB spurious-free dynamic range (SFDR) 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 resolution when driving high-speed SAR or pipeline ADC inputs with dynamic ranges ≥4Vp-p.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal -3dB Bandwidth | 215MHz - supports signal fidelity up to Nyquist frequency of ≥100MSPS ADCs in +2V/V configuration |
| Settling Time to 16 Bit | 63ns (0.0015%) - ensures full-resolution accuracy within one ADC sampling period at ≥15MSPS |
| Slew Rate | 145V/µs - prevents nonlinear distortion on large-amplitude, fast-rising input transients |
| Input Voltage Noise Density | 2.8nV/√Hz - contributes <0.5 LSB noise in 16-bit, 1MHz-bandwidth systems with 4Vp-p FS |
| Spurious-Free Dynamic Range | 100dB at 1MHz, 4Vp-p - meets SFDR requirements for LTE, radar, and medical imaging front ends |
| Output Drive Current | ±60mA - drives ADC input capacitance and series termination resistors without gain error or droop |
| Operating Supply Range | ±4.5V to ±5.5V - compatible with standard ±5V analog rails and tolerant of supply ripple |
Pinout & Package
MAX4431ESA is housed in an 8-pin SO (SOIC-N) surface-mount package with standard 150mil width and 1.27mm pitch. Pin 1 is located at the top-left corner with notch or dot marking; pins are numbered counterclockwise.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | N.C. | No internal connection; must be left floating or tied to ground per layout best practice |
| 2 | VCC | Positive power supply terminal; requires local 0.1µF ceramic bypass to ground |
| 3 | OUT | Amplifier output; capable of ±60mA drive and ≥4Vp-p swing into 500Ω |
| 4 | N.C. | No internal connection; must be left floating or tied to ground |
| 5 | VEE | Negative power supply terminal; requires local 0.1µF ceramic bypass to ground |
| 6 | IN+ | Noninverting input; high-impedance node (1MΩ common-mode, 12kΩ differential) |
| 7 | IN− | Inverting input; matched to IN+ for optimal CMRR and offset performance |
| 8 | N.C. | No internal connection; must be left floating or tied to ground |
Key Features
| Feature | Design Value |
|---|---|
| +2V/V Minimum Stable Gain | Enables higher closed-loop bandwidth than unity-gain designs while avoiding oscillation in gain ≥2 configurations |
| 100dB SFDR at 1MHz, 4Vp-p | Preserves spectral purity in IF sampling and direct-conversion receiver chains without post-amplifier filtering |
| 63ns 16-Bit Settling Time | Supports full-scale step response accuracy in high-throughput data loggers and digital oscilloscope front ends |
| 2.8nV/√Hz Input Voltage Noise | Limits integrated input-referred noise to <1.2µVRMS over 1MHz bandwidth-well below 16-bit LSB at 4Vp-p |
| ±60mA Output Drive | Directly drives 50Ω coaxial traces, 100Ω differential ADC inputs, and RC anti-aliasing networks without buffer stage |
Applications
| High-Speed ADC Preamplifier | IF Amplifier in Direct-Conversion Receiver |
|---|---|
Use Scenario: Driving the analog input of a 16-bit, 25MSPS pipeline ADC in a software-defined radio front end. IC Role / Device Role / Timing Role: Precision gain-stage amplifier providing low-noise, low-distortion signal conditioning immediately prior to ADC sampling. Use Value: 63ns settling ensures full 16-bit accuracy within one sample period; 100dB SFDR maintains ENOB >14.5 bits at 1MHz IF. |
Use Scenario: Amplifying 70MHz IF signal after quadrature downconversion in a cellular base station receiver. IC Role / Device Role / Timing Role: High-linearity, wideband IF buffer with minimal group delay variation across channel bandwidth. Use Value: 215MHz bandwidth accommodates 20MHz LTE channels; 2.8nV/√Hz noise floor avoids degrading receiver sensitivity. |
| Low-Distortion Active Filter Stage | Precision Instrumentation Signal Chain |
Use Scenario: Implementing a 4th-order Butterworth anti-aliasing filter preceding a 14-bit, 10MSPS ADC in test equipment. IC Role / Device Role / Timing Role: Active filter op amp configured in multiple feedback topology with precise pole placement. Use Value: 145V/µs slew rate prevents clipping on filter passband transients; low THD preserves harmonic integrity below −100dBc. |
Use Scenario: Conditioning low-level sensor outputs (e.g., strain gauge bridge) before digitization in industrial PLC analog input modules. IC Role / Device Role / Timing Role: Low-drift, low-noise gain block operating from ±5V supplies with high CMRR against field noise. Use Value: 120dB typical CMRR and 7µV/°C VOS drift ensure stable DC accuracy; 110dB open-loop gain enables precise closed-loop gain control. |
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 |
|---|---|---|---|
| MAX4430ESA | Unity-gain stable; 180MHz BW; 37ns 16-bit settling; lower slew rate (100V/µs) | Better suited for variable-gain or unity-gain buffer applications where stability at AV = 1 is required | Select MAX4430ESA when circuit gain may drop to +1V/V or when wider input common-mode range is needed |
| AD8009ARZ | Current-feedback architecture; 1GHz BW; 5,000V/µs slew rate; higher quiescent current (15mA) | Preferred for ultra-wideband (>500MHz) applications but exhibits gain-dependent bandwidth and poorer DC precision | Choose AD8009ARZ only when bandwidth >500MHz is mandatory and DC specs (VOS, CMRR) are secondary |
Compared with MAX4430ESA and AD8009ARZ, the MAX4431ESA offers the optimal balance of bandwidth, settling speed, and DC precision for fixed-gain ≥+2V/V ADC driver roles-delivering 215MHz bandwidth without sacrificing 110dB open-loop gain or 100dB SFDR.
Availability
MAX4431ESA is available at Aetrix Electronics and suitable for high-speed data acquisition, communications infrastructure, and precision instrumentation requiring stable component supply, long-term manufacturability, and guaranteed SO-8 package consistency.
Supply support for MAX4431ESA 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 and power applications.
The MAX4430–MAX4433 family was designed specifically to replace current-feedback amplifiers in high-resolution ADC driver roles-emphasizing voltage-feedback precision, low distortion, and robust capacitive-load drive without external compensation.
FAQ
What is the minimum stable closed-loop gain for MAX4431ESA?
The MAX4431ESA is internally compensated for closed-loop gains of +2V/V or greater. Operating at gains below +2V/V risks instability and peaking in frequency response. For unity-gain or variable-gain applications, use the MAX4430ESA instead. This gain constraint is hard-coded in the device's compensation network and cannot be overridden externally.
Can MAX4431ESA drive a 1000pF capacitive load?
No-MAX4431ESA is not characterized for stable operation with 1000pF loads. The datasheet specifies a maximum capacitive load of 47pF without sustained oscillations. For larger loads, insert a 10Ω–50Ω isolation resistor (RISO) in series with the output, as shown in Figure 3 of the datasheet. This preserves stability but introduces minor gain error and reduces effective bandwidth.
What is the input common-mode voltage range for MAX4431ESA?
The input common-mode voltage range for MAX4431ESA is specified as VEE + 2.5V to VCC − 0.9V under typical conditions (e.g., ±5V supplies → −2.5V to +4.1V). This range is guaranteed by CMRR testing and ensures linear operation and specified offset performance. Exceeding these limits degrades CMRR and may cause phase reversal or increased input bias current.
Does MAX4431ESA support single-supply operation?
No-MAX4431ESA is a dual-supply op amp requiring both positive (VCC) and negative (VEE) rails. Its input common-mode and output swing specifications assume symmetric ±4.5V to ±5.5V operation. Single-supply use violates absolute maximum ratings and results in undefined behavior, including rail-to-rail input stage saturation and loss of output swing symmetry.
How does MAX4431ESA differ from MAX4431EUK-T?
MAX4431ESA and MAX4431EUK-T share identical electrical specifications and temperature range (−40°C to +85°C), but differ only in packaging: MAX4431ESA uses an 8-pin SOIC-N (SO) package, while MAX4431EUK-T uses a 5-pin SOT23 package. The SO version provides better thermal dissipation (471mW max at +70°C) and easier probing/handling, whereas the SOT23 offers space savings for ultra-compact layouts.
MAX4431ESA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 8-SOIC
MAX4431ESA FAQ
1.How can I place an order for MAX4431ESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4431ESA 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 MAX4431ESA reliable?
The price and inventory of MAX4431ESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4431ESA is usually 5 days.
3.What payment methods are accepted for MAX4431ESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4431ESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4431ESA?
MAX4431ESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4431ESA 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 MAX4431ESA?
For technical support, including MAX4431ESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4431ESA requirements.
6.How does Aetrix verify that MAX4431ESA is sourced from the original manufacturer or authorized distributors?
All MAX4431ESA 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 MAX4431ESA meets industry standards.
7.What is the process for return or replacement of MAX4431ESA?
All MAX4431ESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4431ESA, 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 MAX4431ESA part is unused and in its original packaging.
Return procedure for MAX4431ESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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