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Analog Devices Inc./Maxim Integrated MAX4401AXT-T
- Part No.:
- MAX4401AXT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
MAX4401AXT-T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,596
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Product details
Overview
The MAX4401AXT-T from Maxim Integrated is a single-channel, rail-to-rail output operational amplifier with active-low shutdown control, operating from +2.5V to +5.5V supply, drawing 320µA quiescent current (typ), delivering ±1.4mA output drive, and specified for -40°C to +125°C operation in automotive and industrial sensor signal conditioning.
For engineers reviewing the MAX4401AXT-T datasheet, MAX4401AXT-T pinout, MAX4401AXT-T application, or MAX4401AXT-T equivalent, this page delivers verified package mapping (6-pin SC70), shutdown timing (6µs enable delay), capacitive-load stability (up to 400pF), input offset voltage (±0.8mV typ), and rail-to-rail output swing (within 55mV of rails at 2kΩ load).
Technical Context
The MAX4401AXT-T implements a ground-sensing, unity-gain stable CMOS input stage with rail-to-rail output stage capable of driving 2kΩ loads while maintaining >110dB open-loop gain and 800kHz gain-bandwidth product. Its shutdown logic is active-low, requiring SHDN ≤ 0.3×VDD to enter 1µA (max) supply current mode with high-impedance output.
It supports capacitive loads up to 400pF without external compensation and features 1000GΩ input resistance, 68dB minimum CMRR over VCM = VSS to VDD–1.4V, and 78dB PSRR across 2.5V–5.5V supply range - enabling robust performance in noisy single-supply systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V - enables direct interface with Li-ion battery, 3.3V, and 5V logic domains without level-shifting. |
| Quiescent Current | 320µA per amplifier (typ at 2.5V) - allows continuous operation in always-on sensor nodes with multi-year battery life. |
| Shutdown Supply Current | 1µA (max) - reduces system standby power by >300× versus active mode, critical for intermittent-sampling applications. |
| Gain-Bandwidth Product | 800kHz - supports stable closed-loop gain ≥10 at 80kHz, suitable for anti-aliasing filters and low-frequency instrumentation. |
| Input Offset Voltage | ±0.8mV (typ), ±4.5mV (max) - ensures <0.1% error in 1V full-scale DC-coupled sensor amplification (e.g., thermopile, bridge outputs). |
| Rail-to-Rail Output Swing | Within 55mV of VDD/VSS at 2kΩ load - maximizes dynamic range in single-supply ADC driver stages without headroom loss. |
| Capacitive Load Stability | Stable up to 400pF - eliminates need for isolation resistors when driving long traces, LCD bias networks, or ADC input capacitance. |
Pinout & Package
MAX4401AXT-T is housed in a 6-pin SC70 package (package code X6SN+1), measuring 2.0mm × 1.25mm × 0.9mm, RoHS-compliant, with thermal resistance θJA = 326°C/W (single-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN+ | Noninverting input | High-impedance (1000GΩ), ground-sensing node; accepts common-mode voltages from VSS to VDD–1.4V. |
| 2 IN− | Inverting input | Differential pair input; matched to IN+ for <±0.8mV offset and 68dB CMRR. |
| 3 VSS | Negative supply | Connect to ground in single-supply operation; defines lower rail for rail-to-rail output swing. |
| 4 OUT | Amplifier output | Class-AB rail-to-rail stage; sources/sinks ±1.4mA; enters high-Z state during shutdown. |
| 5 VDD | Positive supply | Accepts +2.5V to +5.5V; requires 0.1µF bypass capacitor to ground for stability. |
| 6 SHDN | Active-low shutdown control | Pulled high to VDD for normal operation; driven low (≤0.3×VDD) to reduce IDD to 1µA and disable output. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Delivers full 0V to VDD swing at 2kΩ load, preserving ADC resolution in single-supply data acquisition. |
| Low-power shutdown mode | Reduces supply current to 1µA max and forces output into high-impedance state-enabling multiplexed sensor front-ends. |
| Unity-gain stability with CLOAD ≤ 400pF | Eliminates need for external series resistor when driving ADC inputs, display bias lines, or long PCB traces. |
| Ground-sensing inputs | Accepts input signals down to VSS (0V), enabling direct interfacing with grounded sensors (e.g., RTDs, strain gauges). |
| 110dB open-loop gain (2kΩ load) | Ensures <0.01% gain error in precision gain blocks and low-drift instrumentation amplifier configurations. |
Applications
| Automotive Sensor Signal Conditioning | Portable Gas Detector Front-End |
|---|---|
|
Use Scenario: Amplifying low-level output from NDIR CO₂ sensor thermopile in vehicle cabin air quality module. IC Role / Device Role / Timing Role: Single-supply DC-coupled transimpedance amplifier with shutdown synchronized to periodic sampling cycle. Use Value: 320µA quiescent current and 1µA shutdown extend 12V battery life; rail-to-rail output fully utilizes 12-bit ADC input range. |
Use Scenario: Conditioning microamp-level current from electrochemical gas sensor in handheld detector. IC Role / Device Role / Timing Role: Low-noise, low-offset transimpedance amplifier with shutdown between 10s measurement intervals. Use Value: ±0.8mV input offset minimizes zero-point drift; 1000GΩ input resistance prevents sensor loading and preserves sensitivity. |
| Industrial Temperature Monitoring Node | Smart HVAC Pressure Transducer Interface |
|
Use Scenario: Amplifying output of PT1000 RTD bridge in DIN-rail mounted temperature transmitter. IC Role / Device Role / Timing Role: Precision noninverting amplifier with ground-sensing inputs referenced to system ground. Use Value: Input common-mode range extending to VSS enables direct connection to grounded bridge; 68dB CMRR rejects 50/60Hz noise on long sensor cables. |
Use Scenario: Driving analog output stage of MEMS pressure sensor in variable-air-volume HVAC controller. IC Role / Device Role / Timing Role: Rail-to-rail output buffer isolating sensor ASIC from 4–20mA loop driver. Use Value: 400pF capacitive-load stability avoids oscillation when driving long twisted-pair wiring; 1.4mA drive capability sustains loop compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSV911ICT | No shutdown function; 550µA quiescent current; 8MHz GBW; SO-6 package only. | Lacks low-power shutdown, limiting use in battery-powered intermittent-sampling systems. | Select when higher bandwidth is required and shutdown is unnecessary. |
| MCP6001T-E/OT | Shut-down capable (1nA IDD); 1MHz GBW; 100µA IQ; SC70-6 package; wider VDD range (1.8–6.0V). | Lower quiescent current but reduced output drive (±23mA vs ±1.4mA) and no guaranteed 400pF capacitive-load stability. | Select for ultra-low-power applications where load drive and capacitive stability are secondary. |
Compared with TSV911ICT and MCP6001T-E/OT, the MAX4401AXT-T uniquely balances shutdown-enabled ultra-low standby power (1µA), proven 400pF capacitive-load stability, and sufficient output drive (±1.4mA) for buffered ADC interfaces - making it optimal for automotive and industrial sensor nodes requiring both precision and power gating.
Availability
MAX4401AXT-T is available at Aetrix Electronics and suitable for automotive sensor modules, portable gas detectors, industrial temperature transmitters, and smart HVAC pressure interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4401AXT-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 MAX4400–MAX4403 family was engineered specifically for cost-sensitive, single-supply sensor signal conditioning and zero-crossing detection in harsh environments - emphasizing rail-to-rail operation, low quiescent power, and extended temperature reliability.
FAQ
What is the maximum capacitive load the MAX4401AXT-T can drive without external compensation?
The MAX4401AXT-T is unity-gain stable with capacitive loads up to 400pF, as confirmed in the Electrical Characteristics table and Typical Operating Characteristics section of the official datasheet. This specification applies under standard test conditions (VDD = +5V, RL = ∞, AV = +1V/V) and eliminates the need for series isolation resistors when driving ADC inputs, long PCB traces, or display bias networks - a key advantage over many general-purpose op amps with similar quiescent current.
Does the MAX4401AXT-T support operation at the lower end of its supply voltage range?
Yes, the MAX4401AXT-T operates reliably from +2.5V to +5.5V, with full functionality including rail-to-rail output swing, 320µA quiescent current, and 1µA shutdown current validated down to 2.5V. The datasheet specifies minimum operating voltage vs. temperature (Figure toc14), confirming stable operation at 2.5V across the full –40°C to +125°C range - making it suitable for Li-ion battery-powered systems where voltage drops below 3.0V during discharge.
How does the shutdown feature of the MAX4401AXT-T affect output behavior?
When the SHDN pin is pulled low (≤0.3×VDD), the MAX4401AXT-T reduces supply current to ≤1µA and places the output in a high-impedance (Hi-Z) state - effectively disconnecting it from the load. This behavior is explicitly documented in the Pin Description and Applications Information sections, and verified by the shutdown output leakage specification (±1.0µA at –40°C to +85°C). It enables safe multiplexing of multiple sensors onto a shared signal path without crosstalk.
What is the input common-mode voltage range of the MAX4401AXT-T?
The MAX4401AXT-T features ground-sensing inputs with an input common-mode voltage range of VSS to VDD–1.4V (min), as specified in the Electrical Characteristics table. This allows the device to accept input signals referenced directly to system ground - essential for interfacing with grounded sensors such as RTDs, thermocouples (with cold-junction compensation), and bridge-based pressure transducers - without requiring level-shifting circuitry.
Is the MAX4401AXT-T qualified for automotive applications?
The MAX4401AXT-T is rated for operation from –40°C to +125°C and meets the environmental stress requirements for automotive under-the-hood applications; however, it is not AEC-Q100 qualified. Only specific variants - MAX4402AKA/V+ and MAX4402AUA/V+ - carry AEC-Q100 qualification per the datasheet's Benefits and Features section. For automotive designs requiring formal qualification, those dual-amplifier variants must be selected instead.
MAX4401AXT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1V/µs
- Gain Bandwidth Product:
- 800 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.1 pA
- Voltage - Input Offset:
- 800 µV
- Current - Supply:
- 410µA
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
MAX4401AXT-T FAQ
1.How can I place an order for MAX4401AXT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4401AXT-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 MAX4401AXT-T reliable?
The price and inventory of MAX4401AXT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4401AXT-T is usually 5 days.
3.What payment methods are accepted for MAX4401AXT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4401AXT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4401AXT-T?
MAX4401AXT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4401AXT-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 MAX4401AXT-T?
For technical support, including MAX4401AXT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4401AXT-T requirements.
6.How does Aetrix verify that MAX4401AXT-T is sourced from the original manufacturer or authorized distributors?
All MAX4401AXT-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 MAX4401AXT-T meets industry standards.
7.What is the process for return or replacement of MAX4401AXT-T?
All MAX4401AXT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4401AXT-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 MAX4401AXT-T part is unused and in its original packaging.
Return procedure for MAX4401AXT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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