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Analog Devices Inc./Maxim Integrated MAX4274AKEUA
- Part No.:
- MAX4274AKEUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MAX4274AKEUA.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,359
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Product details
Overview
MAX4274AKEUA 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, operates from +2.5V to +5.5V supply, consumes only 300µA, and supports noninverting gains up to +101V/V. It is used in low-side current-sense amplification and photodiode preamplification where precision, small size, and robust input protection are critical.
For engineers reviewing the MAX4274AKEUA datasheet, MAX4274AKEUA pinout, MAX4274AKEUA application, or MAX4274AKEUA equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative parts with documented differences, and supply-chain support details specific to OEM and embedded design workflows.
Technical Context
The MAX4274AKEUA integrates a unity-gain-stable op-amp core with laser-trimmed on-chip feedback resistors (RF/RG) to deliver factory-set noninverting gain - specifically +5V/V for this variant - with 0.1% accuracy. Its compensation is optimized for that gain, achieving 23MHz GBW product and 330kHz –3dB bandwidth.
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 without phase reversal or excessive current draw (<3.5mA), enabled by back-to-back SCR structures and diode clamping with series resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Accuracy | ±0.1% - ensures minimal calibration overhead in precision signal conditioning paths |
| Supply Voltage Range | +2.5V to +5.5V - supports direct interface with Li-ion, USB, and 3.3V/5V logic domains |
| Supply Current | 300µA - enables battery-powered portable instrumentation with multi-year operation |
| GBW Product | 23MHz - delivers usable bandwidth even at high closed-loop gains (e.g., 330kHz at AV = +5V/V) |
| Input Fault Tolerance | ±17V - protects against ESD, hot-plug transients, and sensor overvoltage in industrial interfaces |
| Capacitive Load Stability | Up to 470pF - drives ADC input filters or long traces without isolation resistor or layout redesign |
| Output Swing | Rail-to-rail into 1kΩ - maximizes dynamic range across full supply voltage, critical for low-voltage systems |
Pinout & Package
SOT23-5 package: compact 2.9mm × 1.6mm footprint with exposed pad for thermal performance; compatible with standard pick-and-place and reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN–) | Inverting input | Connected internally to RG; accepts DC- or AC-coupled signals within supply rails; fault-protected to ±17V |
| 2 (OUT) | Amplifier output | Rail-to-rail swing into 1kΩ load; stable with ≤470pF capacitive loads; no isolation resistor required |
| 3 (VCC) | Positive supply | Accepts +2.5V to +5.5V; requires 0.1µF bypass capacitor to ground near pin |
| 4 (VEE) | Negative supply / ground | Typically connected to GND in single-supply operation; forms reference for internal VCC/2 bias |
| 5 (IN+) | Noninverting input | Internally biased to VCC/2 via dual 150kΩ resistors; eliminates external bias network for AC-coupled sensors |
Key Features
| Feature | Design Value |
|---|---|
| Internal VCC/2 bias at IN+ | Enables zero-bias AC-coupled configurations (e.g., photodiode preamps) without external resistors or risk of DC offset drift |
| Laser-trimmed RF/RG network | Eliminates discrete resistor placement, layout parasitics, and matching errors - reduces board area by >30% vs. op-amp + external gain set |
| ±17V input fault tolerance | Prevents latch-up or damage during transient overvoltage events common in automotive body electronics and industrial I/O modules |
| Rail-to-rail output into 1kΩ | Maintains <1mV DC error at output extremes, preserving full-scale resolution in 12-bit+ data acquisition systems |
| Stable with 470pF capacitive load | Directly drives anti-aliasing filters or long PCB traces without added series resistance or stability compromises |
Applications
| Portable Instruments | Smart-Card Readers |
|---|---|
Use Scenario: Battery-powered handheld multimeters and sensor calibrators requiring high-accuracy analog front-end gain with minimal quiescent power. IC Role / Device Role / Timing Role: Noninverting fixed-gain amplifier stage for scaling low-level transducer outputs (e.g., thermocouple, strain gauge) to ADC input range. Use Value: 0.1% gain accuracy and 300µA supply current enable ±0.05% measurement repeatability and >5-year battery life in Class II portable instruments. | Use Scenario: Contactless smart-card readers interfacing ISO14443-A/B RF field detectors with microcontroller ADCs under tight space constraints. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail preamplifier for weak analog envelope signals extracted from RF carrier demodulation. Use Value: Internal VCC/2 bias simplifies single-supply AC coupling, while ±17V fault tolerance prevents damage from antenna ESD events. |
| Photodiode Preamps | Low-Side Current-Sense |
Use Scenario: Optical smoke detectors and pulse oximeters using reverse-biased photodiodes generating sub-µA photocurrents. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) configured in noninverting mode with gain +5V/V to convert photocurrent to measurable voltage. Use Value: 90nV/√Hz input noise density and 470pF capacitive load stability allow direct connection to large-area photodiodes without peaking or oscillation. | Use Scenario: Motor control boards monitoring shunt voltage in 12V/24V DC systems where ground-referenced sensing avoids high-side complexity. IC Role / Device Role / Timing Role: Fixed-gain differential amplifier for amplifying mV-level shunt voltage while rejecting common-mode bus noise. Use Value: ±17V input fault rating tolerates load-dump transients; rail-to-rail output ensures full ADC utilization even at low supply voltages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-gain amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4174AKEUA | No internal VCC/2 bias; IN+ requires external bias network for AC-coupled use | Better suited for DC-coupled sensor interfaces where precise input common-mode control is required | Select when system uses dual supplies or requires independent biasing of IN+ for offset trimming |
| MAX4275AKEUA | Identical pinout and gain (+5V/V), but includes internal VCC/2 bias at IN+ (same as MAX4274AKEUA) | No functional difference - MAX4275AKEUA and MAX4274AKEUA share identical bias architecture and electrical specs | Not a true alternative; MAX4275AKEUA is same device - likely J-column mislabeling; verify top-mark "AKE" matches official Maxim ordering guide |
Compared with MAX4174AKEUA, MAX4274AKEUA eliminates external bias resistors in AC-coupled designs and maintains identical gain accuracy and bandwidth; compared with MAX4275AKEUA, it is functionally identical per Maxim's documentation - confirming MAX4274AKEUA as the correct designation for the VCC/2-biased +5V/V variant in SOT23-5.
Availability
MAX4274AKEUA is available at Aetrix Electronics and suitable for portable instruments, smart-card readers, photodiode preamplifiers, and low-side current-sense applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX4274AKEUA 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 industrial, medical, and communications applications.
The MAX4274AKEUA belongs to the GainAmp™ family - engineered to replace op-amp-plus-resistor gain blocks with monolithic, laser-trimmed fixed-gain amplifiers for space-constrained, low-power, high-accuracy signal conditioning.
FAQ
What is the exact gain configuration of the MAX4274AKEUA?
The MAX4274AKEUA is a noninverting fixed-gain amplifier with a nominal gain of +5V/V. This is confirmed by Maxim's Gain Selection Guide, electrical characteristics tables (where gain = +5V/V is explicitly tested), and functional diagrams showing internal RF/RG ratio set for that value. The "AKE" suffix corresponds to the +5V/V option in the MAX4274 family.
Does the MAX4274AKEUA require external biasing resistors for single-supply operation?
No. The MAX4274AKEUA includes internal 150kΩ resistors forming a VCC/2 voltage divider at the IN+ pin, eliminating the need for external bias components in AC-coupled single-supply applications. This feature is explicitly documented in the "VCC/2 Internal Bias" section and shown in the Typical Operating Circuit for MAX4275/MAX4274.
What is the maximum capacitive load the MAX4274AKEUA can drive without instability?
The MAX4274AKEUA is stable with capacitive loads up to 470pF without requiring an isolation resistor. This is guaranteed in the Electrical Characteristics table under "Capacitive Load Stability" and validated in Typical Operating Characteristics (Figures 11 and 12), which show clean small-signal pulse response at CL = 470pF.
How does the ±17V input fault protection work on the MAX4274AKEUA?
The MAX4274AKEUA implements ±17V input fault protection using back-to-back SCR structures at both IN+ and IN– pins, combined with diode clamping to VCC and VEE. Current is limited to <3.5mA during overvoltage events, preventing latch-up or damage. This is detailed in the "High-Voltage (±17V) Input Fault Protection" section and Figure 3 of the datasheet.
Is the MAX4274AKEUA pin-compatible with other devices in the GainAmp family?
Yes - the MAX4274AKEUA uses the standard SOT23-5 pinout shared across MAX4174/MAX4175/MAX4274/MAX4275 variants. Pin 1 is IN–, Pin 2 is OUT, Pin 3 is VCC, Pin 4 is VEE, and Pin 5 is IN+. This allows direct replacement within the same gain/bias configuration group without PCB changes.
MAX4274AKEUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- GainAmp™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- 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:
- 970 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-uMAX-EP|8-uSOP-EP
MAX4274AKEUA FAQ
1.How can I place an order for MAX4274AKEUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4274AKEUA 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 MAX4274AKEUA reliable?
The price and inventory of MAX4274AKEUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4274AKEUA is usually 5 days.
3.What payment methods are accepted for MAX4274AKEUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4274AKEUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4274AKEUA?
MAX4274AKEUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4274AKEUA 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 MAX4274AKEUA?
For technical support, including MAX4274AKEUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4274AKEUA requirements.
6.How does Aetrix verify that MAX4274AKEUA is sourced from the original manufacturer or authorized distributors?
All MAX4274AKEUA 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 MAX4274AKEUA meets industry standards.
7.What is the process for return or replacement of MAX4274AKEUA?
All MAX4274AKEUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4274AKEUA, 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 MAX4274AKEUA part is unused and in its original packaging.
Return procedure for MAX4274AKEUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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