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Analog Devices Inc./Maxim Integrated MAX4274BKEUA
- Part No.:
- MAX4274BKEUA
- 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:
-
MAX4274BKEUA.pdf
- Description:
- IC OPAMP GAIN 50 R-TO-R 8-UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:861
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Product details
Overview
MAX4274BKEUA from Maxim Integrated is a single-channel, noninverting fixed-gain amplifier with internal precision resistors, rail-to-rail output, and VCC/2 biasing at the noninverting input. It delivers +5V/V gain accuracy of ±0.1%, operates from +2.5V to +5.5V supply, consumes only 300µA, and supports stable operation with up to 470pF capacitive load - ideal for low-power single-supply signal conditioning in portable instrumentation.
For engineers reviewing the MAX4274BKEUA datasheet, MAX4274BKEUA pinout, MAX4274BKEUA application, or MAX4274BKEUA 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 layout implications.
Technical Context
The MAX4274BKEUA integrates a rail-to-rail output op-amp core with laser-trimmed on-chip feedback resistors (RF/RG) to achieve factory-set +5V/V noninverting gain and 0.1% DC accuracy. Its internal VCC/2 bias network (dual 150kΩ resistors) eliminates external bias components for AC-coupled inputs in single-supply systems.
It features ±17V fault-protected inputs, 23MHz gain-bandwidth product at AV = +25V/V to +101V/V, and is decompensated per gain tier to maximize usable bandwidth - delivering 1.1MHz -3dB bandwidth at +5V/V. Input common-mode range extends from VEE to VCC − 1.2V, and output swings within 25mV of rails into 100kΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +5V/V noninverting, fixed by internal laser-trimmed RF/RG; enables drop-in replacement of op-amp + external resistor networks without layout change. |
| Gain Accuracy | ±0.1% (typical); ensures precise signal scaling in measurement front-ends without calibration overhead. |
| Supply Voltage | +2.5V to +5.5V single supply; compatible with Li-ion, USB, and 3.3V/5V system rails without level-shifting. |
| Supply Current | 300µA (typical at VCC = 5V); supports battery-powered designs with multi-year runtime in low-duty-cycle sensing. |
| -3dB Bandwidth | 1.1MHz at +5V/V; sufficient for DC–100kHz sensor signals including thermocouple, RTD, and photodiode outputs. |
| Input Fault Protection | ±17V on IN+/IN−; prevents latch-up or damage during hot-plug, ESD transients, or sensor overvoltage events. |
| Capacitive Load Stability | Stable up to 470pF without isolation resistor; simplifies driving ADC input filters or long PCB traces directly. |
Pinout & Package
SOT23-5 package: compact 2.9mm × 1.6mm surface-mount outline with exposed pad for thermal enhancement; suitable for space-constrained portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN−) | Inverting input | Connected internally to RG; must remain within VEE to VCC to avoid distortion; not internally biased. |
| 2 (OUT) | Amplifier output | Rail-to-rail capable; drives 1kΩ load while maintaining DC accuracy; stable with ≤470pF capacitive load. |
| 3 (VCC) | Positive supply | Accepts +2.5V to +5.5V; requires 0.1µF bypass capacitor placed adjacent to pin for noise suppression. |
| 4 (VEE) | Negative supply / ground | Typically connected to GND in single-supply operation; forms reference for internal VCC/2 bias divider. |
| 5 (IN+) | Noninverting input | Internally biased to VCC/2 via dual 150kΩ resistors; enables AC-coupled input without external bias network. |
Key Features
| Feature | Design Value |
|---|---|
| VCC/2 internal bias | Eliminates two external resistors and one capacitor in AC-coupled noninverting configurations, reducing BOM count and layout area by ~30%. |
| Laser-trimmed gain resistors | 0.1% gain tolerance reduces system-level calibration steps and improves channel-to-channel matching in multi-sensor arrays. |
| Rail-to-rail output | Delivers full dynamic range across supply rails into 100kΩ, maximizing SNR when interfacing with 12–16-bit SAR ADCs. |
| ±17V input fault tolerance | Withstands transient overvoltage without current limiting or shutdown, enabling robust front-end protection in industrial I/O modules. |
| 470pF capacitive load drive | Directly drives RC anti-aliasing filters (e.g., 10kΩ + 470pF = 34kHz cutoff) without stability-compromising isolation resistors. |
Applications
| Portable Instrumentation | Smart-Card Readers |
|---|---|
|
Use Scenario: Amplifying low-level analog sensor outputs (e.g., thermistor, strain gauge) in handheld multimeters and data loggers. IC Role / Device Role / Timing Role: Noninverting fixed-gain signal conditioner with integrated bias, providing precise DC-coupled amplification before ADC sampling. Use Value: Eliminates external bias network and trimming resistors, reducing component count and board area while maintaining 0.1% gain accuracy over temperature. |
Use Scenario: Conditioning analog signals from contactless smart-card RF front-ends prior to demodulation and decoding. IC Role / Device Role / Timing Role: AC-coupled noninverting amplifier with internal VCC/2 bias, enabling rail-to-rail signal swing from 13.56MHz carrier envelope detection. Use Value: Supports single-supply 3.3V operation with no external bias components, minimizing power consumption and EMI-sensitive passive count near RF section. |
| Photodiode Preamps | Low-Side Current-Sense |
|
Use Scenario: Transimpedance amplification of weak photocurrents (nA–µA range) in optical smoke detectors and pulse oximeters. IC Role / Device Role / Timing Role: Fixed-gain noninverting amplifier used in transimpedance configuration with external feedback resistor; internal bias sets DC operating point. Use Value: Internal VCC/2 bias stabilizes quiescent output voltage, preventing saturation during dark-current drift and enabling consistent baseline recovery. |
Use Scenario: Amplifying mV-level shunt voltage in battery management systems for charge/discharge current monitoring. IC Role / Device Role / Timing Role: Precision noninverting gain block converting 10–100mV shunt drops to 50–500mV full-scale for 12-bit ADC input. Use Value: ±17V input fault rating protects against load-dump transients; 300µA quiescent current extends battery life in always-on monitoring circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-gain amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4174EUK-T | +5V/V noninverting gain, same SOT23-5 package, but lacks internal VCC/2 bias at IN+; requires external bias network for single-supply AC coupling. | Requires additional 2 resistors + 1 capacitor for biasing; less suitable for space-constrained portable designs where board area is premium. | Select when DC-coupled operation or dual-supply use is required, and external bias components are acceptable. |
| AD8236ARMZ | Instrumentation amplifier with 10V/V fixed gain, 1.8V to 5.5V supply, 55µA ICC, but no internal VCC/2 bias and different pinout (MSOP-8). | Higher CMRR (>100dB) and lower power, but larger footprint and no built-in bias; requires redesign for pin compatibility and layout. | Select when high common-mode rejection is critical (e.g., ECG front-end), and MSOP-8 layout rework is feasible. |
Compared with MAX4174EUK-T, MAX4274BKEUA saves three passive components and simplifies layout for AC-coupled single-supply use; versus AD8236ARMZ, it offers smaller size and integrated bias at the cost of lower CMRR and no differential input stage.
Availability
MAX4274BKEUA is available at Aetrix Electronics and suitable for portable instrumentation, smart-card readers, photodiode preamplifiers, and low-side current-sense applications requiring stable component supply, guaranteed gain accuracy, and long-term production continuity.
Supply support for MAX4274BKEUA 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 demanding industrial, medical, and portable applications, emphasizing integration, reliability, and low-power performance.
The MAX4274BKEUA belongs to the GainAmp™ family of fixed-gain amplifiers, engineered to replace discrete op-amp + resistor gain stages with factory-trimmed accuracy, reduced board area, and simplified single-supply biasing.
FAQ
What is the exact gain configuration and polarity of MAX4274BKEUA?
The MAX4274BKEUA is a noninverting fixed-gain amplifier with precisely trimmed +5V/V gain. Its internal resistor network (RF/RG) is laser-adjusted to deliver ±0.1% accuracy across temperature. The device uses IN+ as the biased input and IN− as the feedback node - confirming true noninverting topology. This configuration is explicitly defined in the Gain Selection Guide and electrical characteristics tables for MAX4274 variants.
Does MAX4274BKEUA require external biasing components for single-supply operation?
No. The MAX4274BKEUA includes internal 150kΩ/150kΩ resistors that generate a precise VCC/2 bias at the IN+ pin, eliminating the need for external resistors or capacitors in AC-coupled noninverting applications. This feature is confirmed in the Functional Diagrams, Pin Description table, and Typical Operating Circuit diagrams for MAX4274/MAX4275 devices.
What is the maximum capacitive load MAX4274BKEUA can drive without instability?
The MAX4274BKEUA is specified stable with capacitive loads up to 470pF without any external isolation resistor. This value is guaranteed in the Electrical Characteristics table under "Capacitive Load Stability" and verified in Typical Operating Characteristics (Figures 11 and 12). Driving >470pF requires series output resistance per Figure 9 in the datasheet.
Is MAX4274BKEUA pin-compatible with other GainAmp devices like MAX4174 or MAX4281?
Yes - all SOT23-5 GainAmp devices (including MAX4174, MAX4274, MAX4281) share identical pinouts: Pin 1 = IN−, Pin 2 = OUT, Pin 3 = VCC, Pin 4 = VEE, Pin 5 = IN+. This is confirmed in the Pin Configurations section and Pin Description table. However, internal functionality differs: MAX4274BKEUA has VCC/2 bias, while MAX4174 does not, and MAX4281 is open-loop.
What is the input voltage range specification for MAX4274BKEUA's IN− and IN+ pins?
For MAX4274BKEUA, the IN− pin must remain between VEE and VCC (i.e., rail-referenced) to avoid distortion, as it connects directly to the internal RG resistor. The IN+ pin is internally biased to VCC/2 and supports common-mode range from VEE to VCC − 1.2V, per the Electrical Characteristics table and Applications Information section.
MAX4274BKEUA 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:
- Discontinued at Digi-Key
- 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:
- 330 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
MAX4274BKEUA FAQ
1.How can I place an order for MAX4274BKEUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4274BKEUA 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 MAX4274BKEUA reliable?
The price and inventory of MAX4274BKEUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4274BKEUA is usually 5 days.
3.What payment methods are accepted for MAX4274BKEUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4274BKEUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4274BKEUA?
MAX4274BKEUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4274BKEUA 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 MAX4274BKEUA?
For technical support, including MAX4274BKEUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4274BKEUA requirements.
6.How does Aetrix verify that MAX4274BKEUA is sourced from the original manufacturer or authorized distributors?
All MAX4274BKEUA 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 MAX4274BKEUA meets industry standards.
7.What is the process for return or replacement of MAX4274BKEUA?
All MAX4274BKEUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4274BKEUA, 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 MAX4274BKEUA part is unused and in its original packaging.
Return procedure for MAX4274BKEUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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