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Analog Devices Inc./Maxim Integrated MAX4243EUB-T
- Part No.:
- MAX4243EUB-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4243EUB-T.pdf
- Description:
- IC OPAMP GP 2 CIRC 10UMAX/USOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,135
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Product details
Overview
MAX4243EUB-T from Maxim Integrated is a dual-channel, micropower operational amplifier with Beyond-the-Rails™ input and rail-to-rail output stages, operating from +1.8V to +5.5V single supply (or ±0.9V to ±2.75V dual). It delivers 90kHz gain-bandwidth, 10µA per amplifier supply current, 200µV input offset voltage, and low-power shutdown mode (<1µA), making it ideal for precision sensor signal conditioning in two-cell alkaline-powered portable systems.
For engineers reviewing the MAX4243EUB-T datasheet, MAX4243EUB-T pinout, MAX4243EUB-T application, or MAX4243EUB-T equivalent, this page provides verified technical context, package-validated pin functions, real-world application mappings, and confirmed alternative options for low-voltage, ultra-low-power op amp selection.
Technical Context
The MAX4243EUB-T integrates two independent amplifiers in a 10-pin µMAX® package, each featuring complementary NPN/PNP input pairs enabling a 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 under 100kΩ load. Its shutdown control (SHDN) forces outputs into high-impedance state while reducing total supply current to <2µA across temperature.
Designed for battery longevity, it achieves up to 200,000 hours operation on two AA alkaline cells and maintains stability driving capacitive loads ≤200pF at unity gain. Input bias current is ±15nA max over −40°C to +85°C, and large-signal open-loop gain exceeds 62dB at 1.8V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.8V to +5.5V single supply - enables direct interface with decaying two-cell alkaline (1.8V end-of-life) without regulator. |
| Supply Current per Amp | 14µA max at TA = −40°C to +85°C - ensures >200,000-hour runtime on two AA alkaline cells in active mode. |
| Shutdown Current | 2.0µA max at VCC = 1.8V - reduces system standby power by >99% versus active mode. |
| Input Offset Voltage | ±2.0mV max over full temperature range - supports precision DC-coupled sensor amplification without trimming. |
| Gain-Bandwidth Product | 90kHz - sufficient for low-frequency sensor signals (e.g., strain gauges, thermistors) with stable unity-gain response. |
| Rail-to-Rail Output Swing | Within 25mV of rails at VCC = 5.0V, RL = 100kΩ - maximizes dynamic range in single-supply data acquisition. |
| Input Common-Mode Range | VEE − 0.2V to VCC + 0.2V - allows direct sensing of signals referenced to ground or near supply rails. |
Pinout & Package
MAX4243EUB-T is housed in a 10-pin µMAX® package (3mm × 3mm, 0.8mm height), pin-compatible with industry-standard 10-lead µMAX footprints and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Amplifier A output | High-impedance during shutdown; swings rail-to-rail; drives 10kΩ load to within 25mV of rails at 5V. |
| 2 (IN−A) | Inverting input A | Protected by 2.2kΩ series resistors and back-to-back diode stacks; differential input resistance ≥45MΩ below 1.8V. |
| 3 (IN+A) | Noninverting input A | Same protection and impedance as IN−A; common-mode range extends 200mV beyond both supplies. |
| 4 (VEE) | Negative supply / ground | Reference for dual-supply operation or ground return in single-supply; bypass with 100nF capacitor. |
| 5 (SHDN) | Shutdown control input | Active-low logic: VIH ≥ 0.7×VCC, VIL ≤ 0.3×VCC; pulls outputs high-Z and cuts supply current to <2µA. |
| 6 (IN−B) | Inverting input B | Independent channel B input; identical specs and protection to IN−A. |
| 7 (IN+B) | Noninverting input B | Independent channel B input; identical specs and protection to IN+A. |
| 8 (OUTB) | Amplifier B output | Functionally identical to OUTA; channel-to-channel isolation ≥80dB at DC. |
| 9 (VCC) | Positive supply | Accepts +1.8V to +5.5V; PSRR ≥71dB ensures stable operation on unregulated battery rails. |
| 10 (NC) | No connect | Internally unused; must be left floating or tied to VEE for mechanical stability (not recommended for signal routing). |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails input stage | Enables direct measurement of signals at or slightly beyond supply rails-critical for battery voltage monitoring and rail-referenced sensors. |
| Rail-to-rail output swing | Delivers full-scale analog output across entire supply range, maximizing ADC utilization in low-voltage microcontroller systems. |
| Ultra-low shutdown current | Reduces system quiescent power to nanoampere-level, enabling multi-year battery life in always-on IoT endpoint devices. |
| Unity-gain stability with 200pF load | Eliminates need for external compensation when driving long traces, ADC inputs, or RC filters in compact portable layouts. |
| Low input offset drift | 2µV/°C TCVOS ensures minimal thermal error accumulation in uncalibrated industrial sensor nodes over wide ambient ranges. |
Applications
| Strain Gauge Signal Conditioning | Digital Scale Front-End |
|---|---|
Use Scenario: Amplifying mV-level Wheatstone bridge output from metal foil strain gauges in handheld weighing devices powered by two AA cells. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier core: one channel for bridge excitation regulation, second for differential gain and offset correction. Use Value: 200µV VOS and rail-to-rail output preserve 16-bit ADC resolution; 10µA per amp extends battery life beyond 1 year at 10-second sampling intervals. | Use Scenario: Low-noise front-end for load cell interface in consumer digital kitchen scales operating from 3V coin cell or two AAA batteries. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier with programmable gain via external resistors; SHDN pin synchronized to display refresh cycle. Use Value: Beyond-the-Rails inputs accept bridge common-mode voltages near battery rail; shutdown cuts system power by 99.9% between weigh events. |
| Portable Medical Sensor Interface | Two-Cell Battery Voltage Monitor |
Use Scenario: Signal conditioning for disposable ECG electrodes in battery-powered wearable monitors using 1.8–3.3V MCU platforms. IC Role / Device Role / Timing Role: First-stage amplifier for biopotential signals; configured as AC-coupled noninverting amp with high-pass filtering. Use Value: 70nV/√Hz input voltage noise and 0.05% THD ensure diagnostic-grade fidelity; 1.5V minimum operation supports aging battery use. | Use Scenario: Real-time monitoring of stacked alkaline cell voltage in remote asset trackers, triggering low-battery alerts before cutoff. IC Role / Device Role / Timing Role: Rail-to-rail comparator with internal hysteresis; configured with feedback resistors to detect 2.4V threshold across 3V stack. Use Value: Input common-mode range down to VEE − 0.2V allows direct sensing of bottom cell voltage without level-shifting; shutdown extends tracker sleep mode to 10+ years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, low-power op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2462IDR | Higher supply current (550µA/amp), no shutdown, 6.4MHz GBW, SO-8 package | Not suitable for multi-year battery life; better for higher-speed, line-powered signal chains | Select only if bandwidth >100kHz required and power budget permits 55× higher current draw. |
| LPV521MG/NOPB | Lower supply current (320nA/amp), no shutdown, 15.5kHz GBW, SC70-6 (single) or DSBGA-8 (dual) | Limited bandwidth restricts use to sub-1kHz DC/ultra-low-frequency sensors; smaller package complicates hand-soldering | Prefer for nanowatt energy harvesting systems where speed is secondary to absolute lowest power. |
Compared with TLV2462IDR and LPV521MG/NOPB, the MAX4243EUB-T uniquely balances ultra-low power (10µA), usable bandwidth (90kHz), integrated shutdown, and robust rail-to-rail I/O-making it optimal for portable precision analog systems requiring multi-year battery operation without sacrificing signal integrity.
Availability
MAX4243EUB-T is available at Aetrix Electronics and suitable for portable medical sensors, battery voltage monitors, digital scales, and strain gauge interfaces requiring stable component supply with guaranteed long-term availability.
Supply support for MAX4243EUB-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, automotive, and communications applications.
The MAX4240–MAX4244 family was engineered specifically for ultra-low-power, low-voltage portable instrumentation-emphasizing rail-to-rail operation, micropower consumption, and robustness in battery-decay environments.
FAQ
What is the minimum operating voltage for the MAX4243EUB-T?
The MAX4243EUB-T is fully specified from +1.8V to +5.5V single supply, but typically operates down to +1.5V. This margin allows reliable function as alkaline batteries discharge from 3.0V fresh to 1.8V end-of-life, and even further in many real-world conditions-ensuring uninterrupted operation in portable equipment without voltage regulation overhead.
Does the MAX4243EUB-T support dual-supply operation?
Yes, the MAX4243EUB-T supports dual-supply operation from ±0.9V to ±2.75V. When used with dual supplies, VEE becomes the negative rail (e.g., −0.9V), VCC the positive rail (e.g., +0.9V), and the SHDN pin must be pulled to VEE to activate shutdown mode. Input common-mode and output swing specifications remain referenced to the respective supply rails.
How does the shutdown feature affect the output state of the MAX4243EUB-T?
When the SHDN pin is driven low, the MAX4243EUB-T disables both amplifiers and forces both outputs (OUTA and OUTB) into a high-impedance state-effectively disconnecting them from the load. This prevents loading of downstream circuitry and eliminates output contention in multiplexed or shared-bus configurations, while reducing total supply current to less than 2µA.
Can the MAX4243EUB-T drive capacitive loads without oscillation?
Yes, the MAX4243EUB-T is unity-gain stable with capacitive loads up to 200pF when driving purely capacitive or RC-filtered loads. For larger capacitances (e.g., >200pF cables or ADC input caps), an isolation resistor (RISO) of 100Ω–1kΩ should be placed in series with the output to maintain phase margin and prevent peaking or ringing-verified in Figure 8c of the official datasheet.
What is the maximum load resistance the MAX4243EUB-T can drive while maintaining rail-to-rail swing?
The MAX4243EUB-T is fully guaranteed to drive a 10kΩ load to within 25mV of either rail at VCC = 5.0V and TA = +25°C. At lower supplies (e.g., +1.8V), output swing degrades slightly-still achieving within 95mV of rails at 10kΩ. For heavier loads (e.g., 2kΩ), swing is reduced further; consult Figures 7a/7b in the datasheet for temperature- and voltage-dependent sink/source current limits.
MAX4243EUB-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Beyond-the-Rails™
- Package/Case:
- 10-TFSOP, 10-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:
- 10-uMAX/uSOP
MAX4243EUB-T FAQ
1.How can I place an order for MAX4243EUB-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4243EUB-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 MAX4243EUB-T reliable?
The price and inventory of MAX4243EUB-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4243EUB-T is usually 5 days.
3.What payment methods are accepted for MAX4243EUB-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4243EUB-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4243EUB-T?
MAX4243EUB-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4243EUB-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 MAX4243EUB-T?
For technical support, including MAX4243EUB-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4243EUB-T requirements.
6.How does Aetrix verify that MAX4243EUB-T is sourced from the original manufacturer or authorized distributors?
All MAX4243EUB-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 MAX4243EUB-T meets industry standards.
7.What is the process for return or replacement of MAX4243EUB-T?
All MAX4243EUB-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4243EUB-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 MAX4243EUB-T part is unused and in its original packaging.
Return procedure for MAX4243EUB-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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