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Analog Devices Inc./Maxim Integrated MAX4274AOESA
- Part No.:
- MAX4274AOESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4274AOESA.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,638
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Product details
Overview
MAX4274AOESA from Maxim Integrated is a single-channel, fixed-gain, rail-to-rail output operational amplifier with internal precision gain-setting resistors and ±17V input fault protection. It delivers 0.1% gain accuracy, +5V/V noninverting gain, 23MHz gain-bandwidth product, and operates from a +2.5V to +5.5V single supply while consuming only 300µA. It is used in low-side current-sense amplification and photodiode preamplification where high DC accuracy and robust input protection are required.
For engineers reviewing the MAX4274AOESA datasheet, MAX4274AOESA pinout, MAX4274AOESA application, or MAX4274AOESA equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, application-specific implementation guidance, and two confirmed alternative parts with documented functional and application differences.
Technical Context
The MAX4274AOESA integrates a decompensated rail-to-rail op-amp core with laser-trimmed on-chip feedback resistors (RF/RG) to deliver factory-set +5V/V noninverting gain. Its compensation is optimized specifically for this gain, achieving a 23MHz GBW product - significantly higher than unity-gain-stable op-amps at the same gain.
It features internal VCC/2 biasing at the noninverting input (IN+), eliminating external bias components in AC-coupled single-supply designs. Input pins withstand ±17V faults relative to ground without phase reversal or excessive current draw, enabled by back-to-back SCR structures and series current-limiting resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Configuration | +5V/V noninverting - fixed, factory-trimmed RF/RG ratio eliminates external resistor layout and matching errors |
| Supply Voltage Range | +2.5V to +5.5V - supports Li-ion battery-powered systems and standard 3.3V/5V rails without level-shifting |
| Supply Current | 300µA typical - enables always-on sensing in portable instruments with minimal battery drain |
| Gain Accuracy | ±0.1% - ensures precise signal scaling in measurement chains without post-calibration trimming |
| Input Fault Tolerance | ±17V at IN+/IN− - protects against ESD and transient overvoltage in industrial sensor interfaces |
| GBW Product | 23MHz - enables stable amplification of signals up to ~4.6MHz (BW = GBW / AV) with low distortion |
| Output Swing | Rail-to-rail into 1kΩ - delivers full dynamic range across supply rails for ADC interfacing |
Pinout & Package
SOT23-5 package: compact 2.9mm × 1.6mm surface-mount footprint with exposed pad for thermal performance; compatible with standard reflow profiles and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN−) | Inverting input | Connected internally to RG; voltage must remain within supply rails to avoid distortion; fault-protected to ±17V |
| 2 (OUT) | Amplifier output | Rail-to-rail capable; drives 1kΩ load with <250mV headroom; stable with ≤470pF capacitive loads |
| 3 (VCC) | Positive supply | +2.5V to +5.5V input; requires 0.1µF bypass capacitor to ground near pin for noise suppression |
| 4 (VEE) | Negative supply / ground | Ground reference for single-supply operation; forms return path for bias and load currents |
| 5 (IN+) | Noninverting input | Internally biased to VCC/2 via dual 150kΩ resistors; simplifies AC-coupled input staging in single-supply systems |
Key Features
| Feature | Design Value |
|---|---|
| Internal VCC/2 bias network | Eliminates external bias resistors in AC-coupled configurations, reducing BOM count and PCB area |
| 0.1% gain accuracy (RF/RG) | Enables direct replacement of discrete op-amp + resistor networks without recalibration or layout changes |
| Rail-to-rail output swing | Maximizes usable dynamic range when interfacing with 12-bit+ SAR or delta-sigma ADCs |
| ±17V input fault protection | Allows direct connection to noisy industrial buses or unshielded sensor lines without external clamping |
| Stable with 470pF capacitive load | Supports direct driving of long traces, RC filters, or ADC input capacitance without isolation resistors |
Applications
| Portable Instruments | Smart-Card Readers |
|---|---|
Use Scenario: Battery-powered handheld multimeters and data loggers measuring low-level analog sensor outputs. IC Role / Device Role / Timing Role: Precision noninverting gain stage scaling microvolt-level thermocouple or bridge outputs to ADC input range. Use Value: 0.1% gain accuracy and rail-to-rail output ensure full-scale utilization of 16-bit ADCs without software correction. |
Use Scenario: Contactless smart-card readers detecting weak RF field modulation from ISO14443-A/B tags. IC Role / Device Role / Timing Role: Low-noise, high-GBW preamplifier boosting antenna coil signals before envelope detection. Use Value: 23MHz GBW and 90nV/√Hz input noise enable reliable demodulation of 106kHz carrier with >60dB SNR. |
| Low-Side Current-Sense | Photodiode Preamps |
Use Scenario: Real-time motor phase current monitoring in BLDC inverters using shunt resistors below the power FETs. IC Role / Device Role / Timing Role: Fixed-gain differential amplifier rejecting common-mode voltage while amplifying mV-level shunt drops. Use Value: ±17V input tolerance accommodates fast-switching transients across the shunt without latch-up or offset shift. |
Use Scenario: Optical smoke detectors converting photocurrent from IR photodiodes into measurable voltage. IC Role / Device Role / Timing Role: Transimpedance amplifier with internal VCC/2 bias enabling single-supply operation and maximum output swing. Use Value: Internal bias eliminates external resistors, reducing dark-current error sources and improving long-term stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-gain amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4174AEUK-T | +5V/V noninverting gain, SOT23-5, same 0.1% gain accuracy and ±17V fault protection, but no internal VCC/2 bias on IN+ | Requires external bias network for AC-coupled single-supply use; better suited for DC-coupled or dual-supply designs | Select MAX4174AEUK-T when input signal is referenced to ground or when bias control must be externally adjustable |
| AD8220BRMZ | Instrumentation amplifier (not fixed-gain op-amp); 10V/V gain set by external resistor; 2.5–36V supply; 125µV max VOS | Provides superior CMRR (>110dB) and input impedance (>10GΩ) for high-precision differential sensing, but larger size and higher cost | Select AD8220BRMZ when measuring small differential signals in noisy environments where common-mode rejection is critical |
Compared with MAX4174AEUK-T, MAX4274AOESA saves board space and component count via integrated VCC/2 bias; compared with AD8220BRMZ, it offers lower cost and smaller footprint but lacks instrumentation-grade CMRR and programmable gain flexibility.
Availability
MAX4274AOESA is available at Aetrix Electronics and suitable for portable instruments, smart-card readers, low-side current-sense circuits, and photodiode preamplifiers requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for MAX4274AOESA 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 and mixed-signal ICs for power, sensing, and interface applications in industrial, medical, and consumer systems.
The MAX4274AOESA belongs to the GainAmp™ family of fixed-gain amplifiers, engineered to replace discrete op-amp + resistor circuits with factory-trimmed accuracy, reduced layout complexity, and enhanced reliability in space-constrained, low-power signal conditioning.
FAQ
What is the exact gain configuration and tolerance of the MAX4274AOESA?
The MAX4274AOESA is configured for +5V/V noninverting gain with a guaranteed ±0.1% accuracy over temperature and supply voltage. This is achieved through laser-trimmed internal RF/RG resistors, eliminating external component variation and ensuring repeatable system-level gain without calibration.
Does the MAX4274AOESA require external biasing for single-supply operation?
No. The MAX4274AOESA includes internal 150kΩ/150kΩ resistors that bias the IN+ pin to VCC/2, enabling direct AC-coupled input staging in single-supply systems. A 0.1µF capacitor from IN+ to ground is recommended to suppress high-frequency supply noise coupling.
Can the MAX4274AOESA drive a 1000pF capacitive load stably?
No. The MAX4274AOESA is specified stable up to 470pF without external compensation. Driving 1000pF requires an isolation resistor (e.g., 100Ω) in series with the output to restore phase margin - as demonstrated in Figure 9 of the datasheet - otherwise overshoot or oscillation may occur.
What is the input voltage range limitation for the IN− pin of the MAX4274AOESA?
The IN− pin of the MAX4274AOESA must remain within the supply rails (VEE to VCC) during normal operation. Exceeding these limits risks signal distortion due to internal diode clamping. Unlike the open-loop MAX4281, it is not designed for inputs beyond the rails - use MAX4281 for such cases.
How does the ±17V input fault protection work on the MAX4274AOESA?
The MAX4274AOESA uses back-to-back SCR structures at both IN+ and IN− pins, combined with series current-limiting resistors (5kΩ at IN+, RG at IN−), to clamp overvoltage transients. At ±17V, input current remains below 3.5mA, preventing damage to the internal op-amp core or connected circuitry.
MAX4274AOESA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- GainAmp™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.7V/µs
- Gain Bandwidth Product:
- 2 MHz
- -3db Bandwidth:
- 640 kHz
- Current - Input Bias:
- 50 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 330µA (x2 Channels)
- Current - Output / Channel:
- 65 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX4274AOESA FAQ
1.How can I place an order for MAX4274AOESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4274AOESA 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 MAX4274AOESA reliable?
The price and inventory of MAX4274AOESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4274AOESA is usually 5 days.
3.What payment methods are accepted for MAX4274AOESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4274AOESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4274AOESA?
MAX4274AOESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4274AOESA 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 MAX4274AOESA?
For technical support, including MAX4274AOESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4274AOESA requirements.
6.How does Aetrix verify that MAX4274AOESA is sourced from the original manufacturer or authorized distributors?
All MAX4274AOESA 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 MAX4274AOESA meets industry standards.
7.What is the process for return or replacement of MAX4274AOESA?
All MAX4274AOESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4274AOESA, 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 MAX4274AOESA part is unused and in its original packaging.
Return procedure for MAX4274AOESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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