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Analog Devices Inc./Maxim Integrated MAX4040EUA-T
- Part No.:
- MAX4040EUA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4040EUA-T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,819
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Product details
Overview
The MAX4040EUA-T from Maxim Integrated is a single-channel, micropower, rail-to-rail input/output operational amplifier optimized for ultra-low-power, low-voltage portable systems. It operates from +2.4V to +5.5V single supply, draws only 10µA quiescent current, delivers 90kHz gain-bandwidth, and swings within 10mV of both rails with 100kΩ load - enabling precision signal conditioning in battery-powered sensor interfaces and portable instrumentation.
For engineers reviewing the MAX4040EUA-T datasheet, MAX4040EUA-T pinout, MAX4040EUA-T application, or MAX4040EUA-T equivalent, key selection criteria include its guaranteed -40°C to +85°C operation, 200µV input offset voltage, rail-to-rail common-mode range (VEE to VCC), unity-gain stability with up to 200pF capacitive loads, and SOT23-5 footprint compatibility for space-constrained designs.
Technical Context
The MAX4040EUA-T employs a dual-input-stage architecture combining NPN and PNP differential pairs to achieve true rail-to-rail input common-mode range extending from VEE to VCC. Its output stage uses complementary MOSFETs to deliver rail-to-rail swing while maintaining linearity across temperature and supply voltage variations.
This op amp features no phase reversal under overdriven inputs, supports single-supply operation down to +2.4V, and exhibits high open-loop gain (94dB typical) and CMRR (85dB typical), making it suitable for precision DC-coupled amplification where input bias current (±2nA typ) and offset drift (2µV/°C) must be tightly controlled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.4V to +5.5V single supply - enables direct connection to Li-ion, alkaline, or coin-cell batteries without regulation. |
| Quiescent Current | 10µA per amplifier - extends battery life in always-on sensor nodes and wearable devices. |
| Gain-Bandwidth Product | 90kHz - sufficient for low-frequency sensor signal conditioning (e.g., strain gauges, thermistors) without instability. |
| Input Offset Voltage | ±200µV max - ensures <0.5% error in 100mV full-scale measurements without trimming. |
| Rail-to-Rail Output Swing | Within 10mV of VEE/VCC at 100kΩ load - maximizes dynamic range in low-voltage ADC front-ends. |
| Input Common-Mode Range | VEE to VCC - allows direct sensing of signals referenced to ground or supply rails. |
| Capacitive Load Stability | Stable with ≤200pF - eliminates need for isolation resistors in most PCB trace and filter capacitor scenarios. |
Pinout & Package
The MAX4040EUA-T is housed in a 5-pin SOT23 package (JEDEC MO-178AA), with 0.95mm pitch, 2.9mm × 1.6mm body, and exposed pad not connected internally. Pin 1 is marked by a dot or notch orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | High-impedance during power-up until 200µs settling; sinks/sourses current to drive 25kΩ load within 60mV of rails. |
| 2 (IN–) | Inverting input | Differential input node with 45MΩ input resistance below 1.8V differential; protected by 2.2kΩ series resistors and diode clamps. |
| 3 (IN+) | Noninverting input | Matches IN– impedance; polarity-sensitive bias current requires matched source impedances to minimize offset error. |
| 4 (VEE) | Negative supply | Tied to GND in single-supply mode; establishes lower rail reference for rail-to-rail input/output operation. |
| 5 (VCC) | Positive supply | Accepts +2.4V to +5.5V; PSRR of 85dB allows direct battery connection without LDO filtering. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal on overdrive | Prevents latch-up or erroneous output states when inputs exceed common-mode range - critical for comparator-mode use. |
| Unity-gain stable to 200pF | Eliminates external compensation components in RC filters, ADC input buffers, and long-trace interconnects. |
| 200µV input offset voltage | Reduces calibration burden in precision current-sense and bridge-amplifier applications (e.g., digital scales). |
| Rail-to-rail input common-mode range | Enables direct interface to sensors with outputs spanning ground to supply - no level-shifting circuitry required. |
| Low input bias current (±2nA) | Minimizes voltage error across high-impedance sources like pH electrodes or piezoelectric transducers. |
Applications
| Battery-Powered Sensor Amplifier | Strain Gauge Interface |
|---|---|
Use Scenario: Amplifying microvolt-level signals from a Wheatstone bridge strain gauge in a handheld torque wrench. IC Role / Device Role / Timing Role: Precision DC-coupled instrumentation amplifier with rail-to-rail input to capture full bridge output swing. Use Value: 200µV offset and 10µA supply current enable sub-0.1% measurement accuracy and >1-year battery life on two AA cells. | Use Scenario: Signal conditioning for a load cell in a portable digital scale with 0.1g resolution. IC Role / Device Role / Timing Role: Low-noise, low-drift gain stage preceding a 16-bit sigma-delta ADC. Use Value: Rail-to-rail output swing maximizes ADC utilization; 2µV/°C drift minimizes temperature-induced calibration drift. |
| Portable Medical Pulse Oximeter | Low-Voltage PDA Front-End |
Use Scenario: Amplifying photodiode current from red/IR LEDs in a battery-operated pulse oximeter. IC Role / Device Role / Timing Role: Transimpedance amplifier with rail-to-rail output driving ADC input directly. Use Value: 90kHz GBW supports pulse waveform fidelity; 10µA ICC enables continuous monitoring on coin-cell power. | Use Scenario: Buffering analog sensor outputs (temperature, ambient light) in a PDAsystem powered by a 3.3V lithium polymer battery. IC Role / Device Role / Timing Role: General-purpose rail-to-rail I/O buffer isolating high-impedance sensors from noisy digital domains. Use Value: +2.4V minimum supply allows operation down to end-of-battery voltage; SOT23-5 footprint saves PCB area in compact form factor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV8511IDBVR | Lower 500nA supply current but 5.5kHz GBW; 1.8V min supply; SOIC-5/SOT23-5 pinout differs (VCC/OUT swapped). | Better for ultra-long-life, sub-kHz applications; unsuitable for 90kHz signal paths or existing MAX4040 layouts. | Select TLV8511IDBVR only if bandwidth demand <10kHz and layout can accommodate pinout change. |
| LPV811MG/NOPB | Same 10µA ICC and 90kHz GBW; 1.6V min supply; identical SOT23-5 pinout; higher 350µV VOS (max). | Compatible drop-in replacement for cost-sensitive designs where ±350µV offset is acceptable. | LPV811MG/NOPB offers same footprint and power profile with broader supply range but relaxed offset spec. |
Compared with MAX4040EUA-T, TLV8511IDBVR trades bandwidth for lower current and different pinout, while LPV811MG/NOPB matches key specs and pinout but has higher offset - making it the preferred functional alternative for layout-compatible upgrades.
Availability
MAX4040EUA-T is available at Aetrix Electronics and suitable for battery-powered sensor amplifiers, portable medical devices, industrial handheld instruments, and low-voltage IoT edge nodes requiring stable component supply across extended temperature ranges.
Supply support for MAX4040EUA-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 MAX4040EUA-T belongs to the MAX4040–MAX4044 micropower rail-to-rail op amp family, engineered specifically for ultra-low-power, low-voltage signal conditioning in portable and battery-operated systems.
FAQ
What is the operating temperature range guaranteed for the MAX4040EUA-T?
The MAX4040EUA-T is fully specified and guaranteed over the extended industrial temperature range of -40°C to +85°C. All electrical parameters - including input offset voltage, supply current, gain-bandwidth product, and output swing - are tested and warranted across this range per the datasheet's TA = TMIN to TMAX conditions.
Does the MAX4040EUA-T support dual-supply operation?
Yes, the MAX4040EUA-T supports dual-supply operation from ±1.2V to ±2.75V. When used in dual-supply mode, VEE becomes the negative rail (e.g., -1.2V) and VCC the positive rail (e.g., +1.2V), preserving rail-to-rail input and output functionality. The device maintains 10µA supply current per amplifier and 90kHz GBW under these conditions.
Can the MAX4040EUA-T be used as a comparator?
Yes, the MAX4040EUA-T can be used as a rail-to-rail input/output comparator. Though optimized as an op amp, its lack of phase reversal and fast power-up time (200µs) make it viable for low-speed, low-power comparison tasks. Propagation delay depends on overdrive voltage - e.g., ~50µs at 100mV overdrive with +5V supply - and external hysteresis is recommended to prevent oscillation.
What is the maximum capacitive load the MAX4040EUA-T can drive without oscillation?
The MAX4040EUA-T is unity-gain stable with capacitive loads up to 200pF when driving a resistive load ≥100kΩ. For heavier capacitive loads (e.g., >200pF), an isolation resistor (RISO) between the output and load is required to maintain stability, though this introduces gain error due to voltage division with the load resistor.
Is the MAX4040EUA-T pin-compatible with other members of the MAX4040–MAX4044 family?
No - the MAX4040EUA-T (SOT23-5, single op amp) is not pin-compatible with MAX4041 (8-pin µMAX/SO, shutdown-enabled), MAX4042 (8-pin, dual), or MAX4044 (14-pin, quad). Only the MAX4040 variants (EUA-T, ESK-T, ESA) share the same 5-pin SOT23 pinout; all others have different pin counts, functions (e.g., SHDN), and package footprints.
MAX4040EUA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- 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:
- 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):
- 2.4 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
MAX4040EUA-T FAQ
1.How can I place an order for MAX4040EUA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4040EUA-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 MAX4040EUA-T reliable?
The price and inventory of MAX4040EUA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4040EUA-T is usually 5 days.
3.What payment methods are accepted for MAX4040EUA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4040EUA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4040EUA-T?
MAX4040EUA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4040EUA-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 MAX4040EUA-T?
For technical support, including MAX4040EUA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4040EUA-T requirements.
6.How does Aetrix verify that MAX4040EUA-T is sourced from the original manufacturer or authorized distributors?
All MAX4040EUA-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 MAX4040EUA-T meets industry standards.
7.What is the process for return or replacement of MAX4040EUA-T?
All MAX4040EUA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4040EUA-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 MAX4040EUA-T part is unused and in its original packaging.
Return procedure for MAX4040EUA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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