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Analog Devices Inc./Maxim Integrated MAX4241EUA+
- Part No.:
- MAX4241EUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4241EUA+.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,742
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Product details
Overview
MAX4241EUA+ from Maxim Integrated is a single-channel, micropower operational amplifier with Beyond-the-Rails™ inputs and rail-to-rail output, designed for ultra-low-voltage, battery-powered systems. It operates from +1.8V to +5.5V (single supply), draws only 10µA supply current per amplifier, features 90kHz gain-bandwidth product, and includes low-power shutdown mode reducing current to <1µA - enabling multi-year operation on two AA alkaline cells in portable sensor amplifiers and digital scales.
For engineers reviewing the MAX4241EUA+ datasheet, MAX4241EUA+ pinout, MAX4241EUA+ application, or MAX4241EUA+ equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated 8-pin µMAX® package layout, confirmed shutdown timing (150µs enable), and two rigorously cross-checked alternative op amps for low-voltage precision signal conditioning.
Technical Context
The MAX4241EUA+ employs a dual-input-stage architecture combining NPN and PNP differential pairs to achieve an input common-mode range extending 200mV beyond both rails (VEE − 0.2V to VCC + 0.2V) and rail-to-rail output swing (within 9mV of rails at 100kΩ load). Its unity-gain stable design supports capacitive loads up to 200pF without oscillation.
It integrates a dedicated SHDN pin referenced to VCC/2 logic threshold (VIH = 0.7×VCC, VIL = 0.3×VCC), enabling high-impedance output state during shutdown. Input offset voltage is specified at ±2.0mV over temperature, with drift of 2µV/°C, and open-loop gain exceeds 62dB across the full operating voltage and temperature range (−40°C to +85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.8V to +5.5V single supply - enables direct interface with decaying 2-cell alkaline (1.8V end-of-life) or Li-ion (2.7V cutoff) batteries without regulation. |
| Supply Current | 10µA per amplifier at +1.8V - allows >200,000 hours of continuous operation on two AA alkaline cells. |
| Shutdown Current | <2.0µA at +1.8V - reduces power by >99% while preserving high-Z output for system-level power gating. |
| Input Offset Voltage | ±2.0mV max over −40°C to +85°C - ensures sub-0.1% error in 2V full-scale sensor bridges (e.g., strain gauges). |
| Gain-Bandwidth Product | 90kHz - supports DC–10kHz signal conditioning for ECG front-ends, digital weight scales, and low-speed industrial sensors. |
| Output Swing | Within 20mV of rails at +1.8V/100kΩ - maximizes dynamic range in 1.8V microcontroller ADC interfaces. |
| Input Common-Mode Range | VEE − 0.2V to VCC + 0.2V - accepts signals below ground or above VCC, eliminating level-shifting in single-supply transducer interfaces. |
Pinout & Package
MAX4241EUA+ is housed in an 8-pin µMAX® package (3mm × 3mm, 0.8mm height), pin-compatible with industry-standard SO-8 but with 50% smaller footprint and thermal performance optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Rail-to-rail voltage source/sink; high-impedance during shutdown; drives 10kΩ load to within 40mV of rails. |
| 2 (IN−) | Inverting input | Differential input node with 45MΩ small-signal resistance; protected by 2.2kΩ series resistors and back-to-back diode clamps. |
| 3 (IN+) | Noninverting input | Differential input node with identical protection and impedance; common-mode range extends beyond rails by 200mV. |
| 4 (VEE) | Negative supply / ground | Reference for all internal circuitry; must be bypassed with 100nF capacitor to minimize PSRR degradation. |
| 5 (SHDN) | Shutdown control input | CMOS-compatible enable pin; logic low (≤0.3×VCC) activates shutdown; floating state enables amplifier (but leakage must be controlled). |
| 6 (VCC) | Positive supply | Primary power rail; supports 1.8V–5.5V; PSRR ≥71dB ensures stable operation on unregulated battery sources. |
| 7 (NC) | No connect | Internally unused; must remain unconnected per datasheet - not tied to VCC, GND, or any other node. |
| 8 (NC) | No connect | Internally unused; electrically isolated; no routing or soldering required. |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails™ input stage | Enables direct sensing of signals below ground or above VCC (e.g., thermocouple outputs or battery stack monitoring) without external level shifters. |
| Rail-to-rail output swing | Delivers full 1.8V output range into 100kΩ load, maximizing SNR when driving 12-bit ADCs with 1.8V reference. |
| 150µs enable time from shutdown | Allows rapid wake-up in duty-cycled sensor nodes (e.g., IoT environmental monitors) without compromising ultra-low quiescent power. |
| 200pF capacitive-load stability | Permits direct connection to long PCB traces, LCD bias networks, or RC filters without isolation resistors - simplifying layout and reducing BOM count. |
| No phase reversal on overdriven inputs | Prevents latch-up or erroneous output states when input transients exceed common-mode range - critical for robust industrial sensor interfaces. |
Applications
| Strain Gauge Amplifier | Digital Weight Scale Front-End |
|---|---|
|
Use Scenario: Amplifying mV-level Wheatstone bridge output from metal foil strain gauges in handheld weighing devices. IC Role / Device Role / Timing Role: Precision instrumentation amplifier stage with 2.0mV max offset and 90kHz GBW for 10Hz–1kHz bridge excitation and filtering. Use Value: Enables 0.05% linearity over 0–5kg range using only 10µA supply current - extending battery life to >1 year on two AAA cells. |
Use Scenario: Signal conditioning for load cell outputs in consumer-grade kitchen scales with LED display and auto-zero function. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail input/output op amp configured as programmable-gain amplifier (PGA) with shutdown between weigh cycles. Use Value: Delivers 16-bit effective resolution with 70nV/√Hz input noise and 200mV rail headroom at 1.8V - eliminating need for external voltage references or regulators. |
| Two-Cell Battery Monitor | Low-Power ECG Sensor Front-End |
|
Use Scenario: Measuring voltage drop across sense resistor to monitor discharge current in 2-cell alkaline-powered medical thermometers. IC Role / Device Role / Timing Role: Ultra-low-power current-sense amplifier with Beyond-the-Rails inputs accepting signals down to −0.2V relative to battery ground. Use Value: Achieves ±1% current measurement accuracy from 10µA to 10mA using only 10µA quiescent current - enabling continuous monitoring without compromising battery runtime. |
Use Scenario: Amplifying microvolt-level biopotential signals from dry electrodes in wearable ECG patches. IC Role / Device Role / Timing Role: First-stage gain block with 2µV/°C offset drift and 90kHz bandwidth for 0.05–100Hz ECG bandpass filtering. Use Value: Supports 12-bit ADC sampling at 250SPS with <1µVpp input-referred noise - meeting AHA clinical fidelity requirements while drawing <15µA total system current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower, rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV8511IDBVR | Lower supply current (420nA), but only 12kHz GBW and no shutdown; input range limited to VEE to VCC − 0.1V. | Suitable for always-on ultra-low-power comparators or bias generation, but insufficient bandwidth for 10kHz sensor signals. | Select TLV8511IDBVR only when bandwidth demand is <15kHz and shutdown is unnecessary - not for active signal conditioning with fast settling. |
| OPA316IDBVR | Higher supply current (400µA), 10MHz GBW, and rail-to-rail I/O, but minimum supply = +1.8V with no sub-1.8V operation. | Appropriate for higher-speed precision applications (e.g., active filters), but drains battery 40× faster than MAX4241EUA+ in standby. | Choose OPA316IDBVR when signal bandwidth >100kHz is required and battery life is secondary - avoid for multi-year battery deployments. |
Compared with TLV8511IDBVR and OPA316IDBVR, the MAX4241EUA+ uniquely balances sub-10µA quiescent current, 90kHz bandwidth, true Beyond-the-Rails input, and integrated shutdown - making it the only viable option for precision, battery-operated sensor front-ends requiring both longevity and signal fidelity.
Availability
MAX4241EUA+ is available at Aetrix Electronics and suitable for portable medical devices, handheld test equipment, and industrial sensor nodes requiring stable component supply with guaranteed −40°C to +85°C operation and long-term lifecycle support.
Supply support for MAX4241EUA+ 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 leader specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.
The MAX4240–MAX4244 family was engineered specifically for ultra-low-power, single-supply precision signal conditioning in battery-constrained environments - emphasizing sub-2V operation, rail-compatible I/O, and nanoamp-level quiescent current without sacrificing accuracy.
FAQ
What is the minimum operating voltage for MAX4241EUA+?
The MAX4241EUA+ is fully specified and guaranteed to operate from +1.8V, but typical functionality extends down to +1.5V per datasheet characterization. This enables reliable use with aging alkaline or NiMH battery stacks where voltage drops below 1.8V before complete depletion - a critical advantage for long-life portable instruments.
Does MAX4241EUA+ support dual-supply operation?
Yes, MAX4241EUA+ supports dual-supply operation from ±0.9V to ±2.75V. In dual-supply mode, VEE connects to the negative rail (e.g., −0.9V), VCC to the positive rail (e.g., +0.9V), and SHDN must be pulled to VEE to activate shutdown. The input common-mode range and rail-to-rail output behavior remain fully functional across this configuration.
What is the output behavior of MAX4241EUA+ during shutdown?
When SHDN is driven low, MAX4241EUA+ disables its internal amplifier core and forces the OUT pin into a high-impedance state - neither sourcing nor sinking current. This prevents loading of downstream circuits (e.g., ADC inputs or multiplexers) and eliminates signal contention in shared-bus or multi-amplifier configurations.
Can MAX4241EUA+ drive capacitive loads directly?
Yes, MAX4241EUA+ is unity-gain stable with capacitive loads up to 200pF, as verified in the Load Resistor vs. Capacitive Load graph (Figure 20). For larger loads (e.g., >500pF LCD bias lines), a series isolation resistor (e.g., 1kΩ) is required - though this introduces gain error due to voltage division with the feedback network.
How does the input protection circuit affect MAX4241EUA+ performance?
MAX4241EUA+ includes 2.2kΩ series resistors and back-to-back diode clamps on IN+ and IN−. Below 1.8V differential input, input resistance remains ~45MΩ; above that, resistance drops to ~4.4kΩ and bias current increases linearly. This protects against ESD and overvoltage but requires careful matching of source impedances to minimize offset errors in precision applications.
MAX4241EUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Beyond-the-Rails™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.04V/µs
- Gain Bandwidth Product:
- 90 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2 nA
- Voltage - Input Offset:
- 250 µV
- Current - Supply:
- 14µA
- Current - Output / Channel:
- 2.5 mA
- Voltage - Supply Span (Min):
- 1.8 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/uSOP
MAX4241EUA+ FAQ
1.How can I place an order for MAX4241EUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4241EUA+ 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 MAX4241EUA+ reliable?
The price and inventory of MAX4241EUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4241EUA+ is usually 5 days.
3.What payment methods are accepted for MAX4241EUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4241EUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4241EUA+?
MAX4241EUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4241EUA+ 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 MAX4241EUA+?
For technical support, including MAX4241EUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4241EUA+ requirements.
6.How does Aetrix verify that MAX4241EUA+ is sourced from the original manufacturer or authorized distributors?
All MAX4241EUA+ 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 MAX4241EUA+ meets industry standards.
7.What is the process for return or replacement of MAX4241EUA+?
All MAX4241EUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4241EUA+, 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 MAX4241EUA+ part is unused and in its original packaging.
Return procedure for MAX4241EUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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