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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:4,936
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Product details
Overview
MAX4040EUA+T from Maxim Integrated is a single-channel, micropower, rail-to-rail input/output operational amplifier optimized for battery-powered systems. It operates from +2.4V to +5.5V single supply, consumes only 10µA supply current, delivers 90kHz gain-bandwidth product, and achieves output swing within 10mV of rails with 100kΩ load - enabling precision signal conditioning in portable medical sensors and low-voltage data acquisition.
For engineers reviewing the MAX4040EUA+T datasheet, MAX4040EUA+T pinout, MAX4040EUA+T application, or MAX4040EUA+T equivalent, key selection criteria include ultra-low quiescent current, guaranteed rail-to-rail I/O performance over –40°C to +85°C, input offset voltage ≤±2.5mV, and compatibility with capacitive loads up to 200pF without external compensation.
Technical Context
The MAX4040EUA+T employs a dual-input-stage architecture combining NPN and PNP differential pairs to achieve true rail-to-rail common-mode input range (VEE to VCC), with crossover at mid-supply. Its output stage uses complementary MOSFETs to deliver rail-to-rail swing while maintaining linearity up to ±200mV from rails under 25kΩ load.
It features no phase reversal on overdriven inputs, unity-gain stability with up to 200pF capacitive load, and high open-loop gain (94dB typ) - making it suitable for precision DC-coupled amplification and low-speed sensor buffering where power and headroom are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.4V to +5.5V single supply - supports direct connection to Li-ion, alkaline, or coin-cell batteries without regulation. |
| Supply Current per Amp | 10µA typ - enables multi-year operation in always-on wearable sensors or IoT endpoint nodes. |
| Gain-Bandwidth Product | 90kHz - sufficient for DC–10kHz sensor signals (e.g., strain gauges, thermistors) with stable unity-gain configuration. |
| Input Offset Voltage | ±2.5mV max (–40°C to +85°C) - ensures <0.1% error in 12-bit ADC front-ends with 2.5V reference. |
| Output Swing (100kΩ) | Within 10mV of VEE and VCC - maximizes dynamic range in single-supply systems with limited headroom. |
| Input Bias Current | ±20nA max (–40°C to +85°C) - allows use with high-impedance sources (e.g., pH electrodes, piezoresistive sensors) without significant offset drift. |
| CMRR | 65dB min - rejects common-mode noise from shared ground paths in compact PCB layouts. |
Pinout & Package
The MAX4040EUA+T is housed in a 5-pin SOT23-5 package (JEDEC MO-178AA), with exposed pad not electrically connected. Pin 1 = VEE (ground for single supply), Pin 2 = IN−, Pin 3 = OUT, Pin 4 = IN+, Pin 5 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VEE) | Negative supply terminal | Tie directly to system ground in single-supply operation; enables rail-to-rail input common-mode range down to 0V. |
| 2 (IN−) | Inverting input | Accepts feedback network; input protection includes 2.2kΩ series resistors and back-to-back diode clamps. |
| 3 (OUT) | Amplifier output | Drives loads up to 25kΩ; high-impedance state not supported (no shutdown pin on MAX4040). |
| 4 (IN+) | Noninverting input | High-impedance node (3pF typical capacitance); match source impedances to minimize bias-current-induced offset. |
| 5 (VCC) | Positive supply terminal | Accepts +2.4V to +5.5V; requires 100nF bypass capacitor to VEE for stable operation. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | VEE to VCC enables full utilization of supply voltage for sensor signal range - critical for low-voltage bridge amplifiers. |
| No phase reversal on overdrive | Prevents latch-up or erroneous output transitions when input exceeds rails - essential for robust comparator-mode use. |
| Unity-gain stable with 200pF load | Eliminates need for external isolation resistor in PCB trace or cable-driven applications (e.g., remote sensor nodes). |
| 200µV typical input offset voltage | Reduces calibration burden in precision instrumentation; drift ≤2µV/°C minimizes temperature-induced errors. |
| Low input capacitance (3pF) | Minimizes phase shift and peaking with high-source-impedance sensors - improves stability in pH or photodiode interfaces. |
Applications
| Battery-Powered Medical Sensors | Strain Gauge Signal Conditioning |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) using amperometric biosensor operating from coin-cell battery. IC Role / Device Role / Timing Role: Transimpedance amplifier converting pA-level sensor current to voltage with rail-to-rail output swing. Use Value: 10µA supply current extends battery life beyond 2 years; rail-to-rail I/O preserves full 1.5V sensor signal range on 1.8V supply. | Use Scenario: Digital scale with quarter-bridge strain gauge array powered by two AA cells. IC Role / Device Role / Timing Role: Low-noise instrumentation amplifier front-end with gain of 1000V/V. Use Value: ±2.5mV max offset ensures <0.05% full-scale error; 90kHz GBW supports fast settling for 100Hz sampling. |
| Portable Gas Detection Modules | Low-Voltage Data Acquisition Front-End |
Use Scenario: Handheld CO detector with electrochemical sensor and 12-bit SAR ADC. IC Role / Device Role / Timing Role: Sensor voltage buffer isolating high-impedance electrode from ADC input capacitance. Use Value: 3pF input capacitance prevents ADC sampling distortion; rail-to-rail output drives ADC reference directly. | Use Scenario: Industrial wireless sensor node measuring temperature and humidity with microcontroller ADC. IC Role / Device Role / Timing Role: Single-supply signal conditioner for thermistor and capacitive humidity sensor outputs. Use Value: +2.4V minimum supply allows operation down to 2.5V battery voltage; 65dB CMRR rejects switching regulator noise. |
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 supply current (420nA), but only 12kHz GBW and 10mV output swing limitation at 10kΩ load. | Suitable for ultra-long-life applications with bandwidth <1kHz; insufficient for strain gauge AC excitation. | Select TLV8511IDBVR only when sub-µA current dominates over bandwidth and drive strength requirements. |
| OPA316IDBVR | Higher supply current (400µA), 10MHz GBW, and 25mA output drive - trades power for speed and load capability. | Required for active filters or driving ADC drivers; overkill for static sensor buffering. | Choose OPA316IDBVR when >100kHz signal bandwidth or heavy capacitive loads (>1nF) are present. |
Compared with TLV8511IDBVR and OPA316IDBVR, the MAX4040EUA+T uniquely balances 10µA quiescent current, 90kHz bandwidth, and rail-to-rail I/O in a 5-pin SOT23 - making it optimal for precision, battery-constrained DC signal chains where neither nanoamp nor megahertz extremes apply.
Availability
MAX4040EUA+T is available at Aetrix Electronics and suitable for battery-powered medical sensors, strain gauge signal conditioning, portable gas detection modules, and low-voltage data acquisition front-ends 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 op amp family, engineered specifically for ultra-low-power, rail-to-rail signal conditioning in portable and battery-operated systems.
FAQ
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, as confirmed in the Electrical Characteristics table and Load Resistor vs. Capacitive Load graph. For loads exceeding 200pF, an isolation resistor (e.g., 1kΩ) between the MAX4040EUA+T output and the load is required to maintain stability - though this introduces gain error due to voltage division with the load resistance.
Does the MAX4040EUA+T have a shutdown pin?
No, the MAX4040EUA+T does not include a shutdown pin. Shutdown functionality is only available on the MAX4041 and MAX4043 variants in the same family. The MAX4040EUA+T operates continuously when powered and draws 10µA per amplifier regardless of signal activity - making it appropriate for always-on sensing but not for duty-cycled ultra-low-power systems.
What is the output voltage swing specification for the MAX4040EUA+T at 2.4V supply?
At VCC = +2.4V and RL = 100kΩ, the MAX4040EUA+T output typically swings from (VEE + 10mV) to (VCC – 10mV), i.e., 0.01V to 2.39V. This is verified in the Typical Operating Characteristics section (Figure 3) and Electrical Characteristics table (VOH/VOL specifications), ensuring usable dynamic range even at minimum supply voltage.
Can the MAX4040EUA+T be used as a comparator?
Yes, the MAX4040EUA+T can be used as a rail-to-rail input/output comparator, as explicitly stated in the Applications Information section. Propagation delay depends on overdrive voltage (e.g., ~20µs for 100mV overdrive at +5V supply). External hysteresis is recommended to prevent oscillation near threshold; however, quiescent current rises to ~28–35µA during saturation, slightly above the 10µA nominal spec.
Is the MAX4040EUA+T pin-compatible with other packages in the MAX4040 family?
The MAX4040EUA+T uses the 5-pin SOT23-5 package, while other MAX4040 variants (e.g., MAX4040ESA, MAX4040EUK-T) use 8-pin µMAX or SO packages with different pinouts and additional terminals (e.g., NC pins). Therefore, the MAX4040EUA+T is not pin-compatible with those variants - PCB layout must be specific to the SOT23-5 footprint shown in the Pin Configurations diagram.
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:
- 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):
- 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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