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Analog Devices Inc./Maxim Integrated MAX4242EUA-T
- Part No.:
- MAX4242EUA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4242EUA-T.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,650
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Product details
Overview
MAX4242EUA-T from Maxim Integrated is a dual, micropower, rail-to-rail input/output operational amplifier optimized for ultra-low-voltage, battery-powered systems. It operates from +1.8V to +5.5V single supply (or ±0.9V to ±2.75V dual), draws only 10µA per amplifier, features Beyond-the-Rails™ inputs extending 200mV beyond both rails, and delivers 90kHz gain-bandwidth - enabling precision signal conditioning in portable medical sensors and two-cell alkaline-powered instrumentation.
For engineers reviewing the MAX4242EUA-T datasheet, MAX4242EUA-T pinout, MAX4242EUA-T application, or MAX4242EUA-T equivalent, this page provides verified electrical specifications, µMAX®-8 package terminal mapping, real-world use cases in low-power analog front-ends, and validated alternative op amps with documented functional trade-offs.
Technical Context
The MAX4242EUA-T integrates two independent amplifiers in an 8-pin µMAX® package, each featuring a complementary NPN/PNP input stage enabling true Beyond-the-Rails common-mode range (VEE − 0.2V to VCC + 0.2V) and rail-to-rail output swing (within 9mV of rails at 100kΩ load). Its 90kHz GBW and 68° phase margin ensure stable unity-gain operation with capacitive loads up to 200pF.
No shutdown function is included (unlike MAX4241/MAX4243), eliminating SHDN pin complexity. Input offset voltage is ±0.20mV (typ), input bias current ±2nA (typ), and PSRR is 77dB (min) over full supply range - supporting direct connection to decaying battery rails without regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.8V to +5.5V single supply - enables direct operation from two AA/AAA alkaline cells (1.8V cutoff) or Li-ion (2.7–3.6V). |
| Supply Current per Amp | 10µA at +1.8V - supports >200,000 hours runtime on two AA alkaline cells in active mode. |
| Input Common-Mode Range | VEE − 0.2V to VCC + 0.2V - allows sensing signals below ground or above VCC in single-supply systems. |
| Output Swing | Within 9mV of rails (100kΩ load) - maximizes dynamic range for ADC interfacing at low supply voltages. |
| Gain-Bandwidth Product | 90kHz - sufficient for DC–10kHz sensor signal conditioning (e.g., strain gauges, thermistors) with stability margin. |
| Input Offset Voltage | ±0.20mV (max at +25°C) - enables sub-10µV precision in high-gain, low-drift instrumentation amplifiers. |
| Capacitive Load Stability | Stable up to 200pF - eliminates need for external isolation resistors in most PCB trace and filter capacitor scenarios. |
Pinout & Package
MAX4242EUA-T is housed in an 8-pin µMAX® package (5.0mm × 3.0mm × 1.1mm, exposed pad), pin-compatible with industry-standard SO-8 but with 50% smaller footprint. Thermal performance is rated for 330mW at +70°C (derated 4.1mW/°C above).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Rail-to-rail sourcing/sinking node; connects directly to ADC input or next-stage buffer without level-shifting. |
| 2 (IN− A) | Inverting input A | Differential node for precision feedback networks; matched impedance critical to minimize offset error from ±2nA bias current. |
| 3 (IN+ A) | Non-inverting input A | High-impedance sensor interface point; supports Beyond-the-Rails operation down to VEE − 0.2V for ground-referenced transducers. |
| 4 (VEE) | Negative supply / GND | Reference return for both amplifiers; must be low-impedance path to minimize noise coupling between channels. |
| 5 (IN+ B) | Non-inverting input B | Independent second channel input; enables differential pair configuration or dual-sensor monitoring in same package. |
| 6 (IN− B) | Inverting input B | Second channel feedback node; channel-to-channel isolation >80dB prevents crosstalk in multi-channel data acquisition. |
| 7 (OUT B) | Amplifier B output | Fully independent output; no internal connection to OUT A - supports isolated signal paths or dual feedback loops. |
| 8 (VCC) | Positive supply | Single power rail for both amplifiers; bypassing with 100nF ceramic capacitor to VEE is mandatory for PSRR >77dB. |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails input stage | Enables direct interface to sensors operating outside VCC/VEE - e.g., thermocouples referenced to chassis ground in battery-powered equipment. |
| Rail-to-rail output swing | Delivers full-scale signal to 12-bit+ SAR ADCs without external level-shifting, preserving SNR in low-voltage systems. |
| 90kHz GBW with 68° phase margin | Guarantees stable unity-gain buffering of slow-moving sensor outputs (e.g., pH electrodes, RTDs) without oscillation. |
| 200pF capacitive-load drive | Supports direct connection to anti-aliasing filters or long PCB traces without added series resistance or gain error. |
| ±0.20mV max input offset (25°C) | Reduces calibration burden in portable weighing scales and medical ECG front-ends requiring <10µV baseline accuracy. |
Applications
| Portable Medical Sensors | Two-Cell Battery Instrumentation |
|---|---|
Use Scenario: Amplifying microvolt-level bio-signals (e.g., ECG, EMG) from dry-electrode sensors in wearable monitors powered by two AAA batteries. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier providing gain and common-mode rejection before 16-bit sigma-delta ADC sampling at 1kHz. Use Value: Beyond-the-Rails inputs accept electrode offsets up to ±200mV; 10µA quiescent current extends battery life to >1 week continuous operation. | Use Scenario: Signal conditioning for digital weight scales using strain-gauge bridges powered by two alkaline AA cells (1.8–3.0V range). IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier front-end, with one amp for bridge excitation regulation and one for differential output amplification. Use Value: Rail-to-rail output ensures full ADC utilization across entire battery discharge curve; ±0.20mV VOS limits zero-error to <0.05% of full scale. |
| Low-Power Environmental Sensors | Industrial Handheld Testers |
Use Scenario: Conditioning output of low-power temperature/humidity sensors (e.g., Sensirion SHT40) in battery-operated IoT nodes. IC Role / Device Role / Timing Role: Low-noise buffer and level-shifter between sensor analog output and MCU's 12-bit ADC with internal reference. Use Value: 70nV/√Hz input voltage noise preserves signal integrity; 90kHz GBW accommodates fast step-response requirements of dew-point calculations. | Use Scenario: Analog front-end in handheld multimeters measuring mV/mA ranges with auto-ranging and battery backup. IC Role / Device Role / Timing Role: Dual op amp implementing precision current-to-voltage conversion (shunt monitor) and buffered reference scaling. Use Value: Channel-to-channel isolation >80dB prevents measurement crosstalk between voltage and current modes; 10µA supply enables >1 year shelf life on coin cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual, micropower, rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV358IDR | Higher supply current (80µA vs. 10µA), wider supply range (+2.7V to +5.5V), no Beyond-the-Rails input (CMR = 0 to VCC − 1.5V). | Suitable for higher-speed (1MHz GBW) or higher-supply applications where ultra-low power is secondary. | Select when system uses regulated 3.3V supply and requires faster settling; avoid for sub-2V battery operation or ground-sensing. |
| MCP6022-E/SN | Lower input offset (±250µV max), higher GBW (1MHz), same 10µA supply, but CMR limited to VSS to VDD − 0.3V (no Beyond-the-Rails). | Better for precision DC applications needing lower offset drift, but cannot interface sensors referenced below ground. | Prefer for stable-temperature lab equipment; reject for portable devices with unregulated battery rails and wide common-mode excursions. |
Compared with LMV358IDR and MCP6022-E/SN, MAX4242EUA-T uniquely combines sub-2V operation, true Beyond-the-Rails input, and 10µA quiescent current - making it irreplaceable in two-cell alkaline-powered systems requiring ground-referenced sensor interfacing without voltage translation.
Availability
MAX4242EUA-T is available at Aetrix Electronics and suitable for portable medical sensors, two-cell battery instrumentation, low-power environmental sensors, and industrial handheld testers requiring stable component supply with guaranteed long-term availability.
Supply support for MAX4242EUA-T 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 demanding industrial, medical, and communications applications.
The MAX4240–MAX4244 family was engineered specifically for ultra-low-power, single-supply precision amplification in portable and battery-constrained systems - emphasizing Beyond-the-Rails input capability, rail-to-rail output, and nanoscale quiescent current.
FAQ
What is the minimum operating voltage for MAX4242EUA-T?
The MAX4242EUA-T is fully specified from +1.8V to +5.5V single supply. While guaranteed down to +1.8V, typical operation extends to +1.5V - enabling compatibility with deeply discharged two-cell alkaline or NiMH batteries. This behavior is confirmed in the Typical Operating Characteristics plots showing functional operation at 1.5V across temperature.
Does MAX4242EUA-T include a shutdown pin?
No, MAX4242EUA-T does not feature a shutdown function. Shutdown capability is exclusive to the MAX4241 (single) and MAX4243 (dual) variants within the family. The MAX4242EUA-T operates continuously when powered and has no SHDN pin - simplifying layout and reducing control logic overhead in always-on sensor nodes.
What is the input common-mode voltage range of MAX4242EUA-T?
The input common-mode voltage range of MAX4242EUA-T is specified as VEE − 0.2V to VCC + 0.2V - a true Beyond-the-Rails characteristic. At +1.8V supply, this means inputs function from −0.2V to +2.0V. This enables direct interface to transducers with offsets below ground (e.g., thermocouples) or above VCC (e.g., photodiode bias networks) without external level-shifting circuitry.
Can MAX4242EUA-T drive a 10kΩ load rail-to-rail?
Yes, MAX4242EUA-T is fully guaranteed to drive a 10kΩ load while maintaining rail-to-rail output swing - defined as within 40mV of VCC or VEE. At +1.8V supply and +25°C, typical swing is within 6mV of VEE and 8mV of VCC with 100kΩ load; with 10kΩ, worst-case swing remains within 40mV per rail, as validated in the Electrical Characteristics table under VOH/VOL conditions.
Is MAX4242EUA-T pin-compatible with standard SO-8 op amps?
MAX4242EUA-T uses the 8-pin µMAX® package (5.0mm × 3.0mm), which shares identical pinout ordering with SO-8 but has a smaller footprint and different thermal pad structure. While electrically pin-compatible for signal connections (VCC, VEE, IN+, IN−, OUT per channel), PCB layout must accommodate µMAX® dimensions and thermal pad requirements - it is not a drop-in replacement for SO-8 without board revision.
MAX4242EUA-T 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:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- 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 (x2 Channels)
- 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
MAX4242EUA-T FAQ
1.How can I place an order for MAX4242EUA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4242EUA-T 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 MAX4242EUA-T reliable?
The price and inventory of MAX4242EUA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4242EUA-T is usually 5 days.
3.What payment methods are accepted for MAX4242EUA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4242EUA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4242EUA-T?
MAX4242EUA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4242EUA-T 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 MAX4242EUA-T?
For technical support, including MAX4242EUA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4242EUA-T requirements.
6.How does Aetrix verify that MAX4242EUA-T is sourced from the original manufacturer or authorized distributors?
All MAX4242EUA-T 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 MAX4242EUA-T meets industry standards.
7.What is the process for return or replacement of MAX4242EUA-T?
All MAX4242EUA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4242EUA-T, 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 MAX4242EUA-T part is unused and in its original packaging.
Return procedure for MAX4242EUA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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