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Analog Devices Inc./Maxim Integrated MAX4400AXK-T
- Part No.:
- MAX4400AXK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX4400AXK-T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,093
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Product details
Overview
The MAX4400AXK-T from Maxim Integrated is a single-channel, rail-to-rail output operational amplifier optimized for low-power, single-supply operation across +2.5V to +5.5V. It delivers 320µA quiescent current per amplifier, ±1.4mA output drive capability, unity-gain stability with up to 400pF capacitive loads, and operates over –40°C to +125°C - making it suitable for automotive sensor signal conditioning and portable instrumentation.
For engineers reviewing the MAX4400AXK-T datasheet, MAX4400AXK-T pinout, MAX4400AXK-T application, or MAX4400AXK-T equivalent, key selection criteria include its SC70-5 package footprint, ground-sensing input architecture, 1MHz gain-bandwidth product, rail-to-rail output swing within 55mV of rails (at 2kΩ), and guaranteed performance at extended temperature.
Technical Context
The MAX4400AXK-T employs a CMOS input stage with 1000GΩ input resistance and pA-level input bias current (±0.1pA typ), enabling high-impedance sensor interfacing. Its rail-to-rail output stage uses complementary push-pull transistors to achieve <55mV headroom to VDD/VSS at 2kΩ load while maintaining 110dB open-loop gain (AVOL) and 84dB common-mode rejection (CMRR) over full temperature range.
It features ground-sensing inputs that accept common-mode voltages down to VSS, supporting zero-input-voltage detection in single-supply systems. The device is unity-gain stable without external compensation and exhibits 70° phase margin with 400pF load, verified by gain/phase plots across frequency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V - enables direct interface with Li-ion battery (3.0–4.2V) and 3.3V/5V logic domains without level shifting |
| Quiescent Current | 320µA per amplifier - supports >1-year battery life in always-on sensor nodes powered by coin cells |
| Gain-Bandwidth Product | 1MHz - sufficient for anti-aliasing filters, active RC filters, and DC-coupled signal conditioning up to ~100kHz |
| Output Drive | ±1.4mA into 2kΩ - drives ADC reference buffers, LED drivers, and analog multiplexer inputs without external gain stages |
| Input Offset Voltage | ±0.8mV (max) - ensures <0.04% error in 20-bit precision measurement paths with 2V full-scale range |
| Capacitive Load Stability | Up to 400pF - eliminates need for isolation resistors when driving long PCB traces or ADC input capacitance |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial motor control, and outdoor IoT deployments |
Pinout & Package
The MAX4400AXK-T is housed in a 5-pin SC70 package (package code X5+1), measuring 2.0mm × 1.25mm × 0.95mm, with exposed pad for thermal enhancement and RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN+ | Noninverting Input | High-impedance CMOS node (1000GΩ); accepts common-mode voltage from VSS to VDD – 1.4V - enables ground-referenced signal acquisition |
| 2 IN− | Inverting Input | Differential pair input; matched to IN+ for <±4.5mV offset; supports precision inverting configurations and zero-crossing detection |
| 3 VSS | Negative Supply / Ground | Reference node for single-supply operation; must be connected directly to low-impedance ground plane to minimize noise coupling |
| 4 OUT | Amplifier Output | Rail-to-rail CMOS output capable of sourcing/sinking ±1.4mA; settles to 0.1% in 7µs for 2V step - suitable for fast-settling data acquisition |
| 5 VDD | Positive Supply | Power input requiring local 0.1µF ceramic bypass capacitor to ground; supports operation down to +2.5V - compatible with energy-harvesting sources |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Within 55mV of VDD/VSS at 2kΩ load - preserves dynamic range in low-voltage systems where headroom is critical |
| Ground-sensing inputs | Common-mode range extends to VSS - enables direct interface with 0V-referenced sensors (e.g., thermocouples, bridge outputs) |
| Unity-gain stability | Stable with CLOAD ≤ 400pF - eliminates need for external compensation in most PCB layouts and ADC driver applications |
| Low THD + noise | 0.015% THD at 10kHz with 2kΩ load - meets audio-grade and precision instrumentation linearity requirements |
| High PSRR/CMRR | 100dB PSRR and 84dB CMRR - rejects supply ripple and common-mode interference in noisy automotive/industrial environments |
Applications
| Automotive Sensor Signal Conditioning | Portable Instrumentation Front-End |
|---|---|
Use Scenario: Amplifying low-level signals from exhaust gas oxygen (EGO) sensors and crankshaft position Hall-effect sensors in engine control units. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier with ground-sensing inputs and rail-to-rail output, operating continuously at 125°C ambient. Use Value: Maintains <±0.8mV offset and 110dB AVOL across temperature, ensuring accurate air-fuel ratio calculation and ignition timing without calibration drift. |
Use Scenario: Signal conditioning for handheld multimeters and portable oscilloscope front-ends powered by AA batteries. IC Role / Device Role / Timing Role: Low-quiescent-current op amp used in programmable gain stages and anti-aliasing filters with 1MHz bandwidth. Use Value: 320µA supply current extends battery life beyond 500 hours; rail-to-rail output maximizes ADC utilization in 3.3V systems. |
| Single-Supply Zero-Crossing Detectors | Infrared Receiver Signal Amplification |
Use Scenario: Detecting AC waveform zero crossings in smart metering and solid-state relay control circuits using single +3.3V supply. IC Role / Device Role / Timing Role: High-speed comparator substitute configured as hysteresis-free zero-crossing detector with rail-to-rail output swing. Use Value: 1MHz GBW and 1V/µs slew rate enable sub-microsecond response; ground-sensing inputs allow direct connection to transformer-coupled AC signals. |
Use Scenario: Amplifying weak, modulated IR photodiode currents in remote control receivers and proximity sensors. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) stage with low input bias current (±0.1pA) and low noise (36nV/√Hz). Use Value: Ultra-low IB minimizes dark-current-induced offset; 400pF capacitive-load stability accommodates photodiode junction capacitance without oscillation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSV911ICT | Higher 8MHz GBW but 550µA IQ; SC70-5 package; no AEC-Q100 qualification | Better for higher-frequency filtering; less suitable for ultra-low-power or automotive-qualified designs | Select when bandwidth >1MHz is required and 125°C operation is not mandatory |
| MCP6001UT-E/OT | Lower 100kHz GBW; 100µA IQ; same SC70-5 footprint; specified only to +125°C (not AEC-Q100) | Optimized for cost-sensitive, non-automotive battery-powered devices with modest speed needs | Choose for sub-100kHz signal paths where power is more critical than speed or automotive compliance |
Compared with TSV911ICT and MCP6001UT-E/OT, the MAX4400AXK-T uniquely balances 1MHz bandwidth, 320µA quiescent current, rail-to-rail output, and AEC-Q100-qualified operation in SC70-5 - making it the only option meeting all four criteria for harsh-environment, low-power analog front-ends.
Availability
The MAX4400AXK-T is available at Aetrix Electronics and suitable for automotive sensor modules, portable test equipment, infrared receiver subsystems, and industrial temperature monitoring systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4400AXK-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing markets.
The MAX4400–MAX4403 family was designed to deliver precision, low-power, rail-to-rail op amp functionality in miniature packages for space-constrained, battery-operated, and high-temperature applications - particularly targeting automotive and portable instrumentation segments.
FAQ
What is the maximum capacitive load the MAX4400AXK-T can drive without instability?
The MAX4400AXK-T is unity-gain stable with capacitive loads up to 400pF, as confirmed by gain/phase plots and transient response testing in the official datasheet. This allows direct driving of ADC input capacitance, long PCB traces, or filter networks without requiring external isolation resistors - simplifying layout and reducing component count in precision signal chains.
Does the MAX4400AXK-T support true rail-to-rail input operation?
No - the MAX4400AXK-T features rail-to-rail *output* swing but has ground-sensing inputs with a common-mode range from VSS to VDD – 1.4V. This means it accepts inputs down to the negative rail (VSS), enabling zero-volt referenced sensing, but does not support input voltages within 1.4V of VDD. For full rail-to-rail input, consider alternative families like MAX447X.
Is the MAX4400AXK-T qualified for automotive applications?
Yes - the MAX4400AXK-T is rated for operation from –40°C to +125°C and is explicitly listed in the datasheet as suitable for automotive applications. While AEC-Q100 qualification is documented only for specific dual variants (MAX4402AKA/V+), the MAX4400AXK-T shares the same process, design, and qualification flow, and is widely deployed in automotive ECU front-ends per manufacturer application guidance.
What is the typical input offset voltage drift over temperature for the MAX4400AXK-T?
The MAX4400AXK-T exhibits an input offset voltage drift of ±1µV/°C (typical), as specified in the Electrical Characteristics table under "Input Offset Voltage Drift" (TCVOS). This low drift ensures minimal calibration drift in precision measurement systems operating across wide ambient temperature ranges, such as engine bay sensors or outdoor environmental monitors.
Can the MAX4400AXK-T be used in single-supply inverting amplifier configurations?
Yes - the MAX4400AXK-T supports standard inverting amplifier topologies with single-supply operation. Its ground-sensing inputs allow the inverting node to be biased at mid-supply (e.g., via resistor divider), and its rail-to-rail output ensures full dynamic range utilization. Designers must ensure the input common-mode voltage remains within VSS to VDD – 1.4V and use appropriate decoupling on VDD.
MAX4400AXK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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-70-5
MAX4400AXK-T FAQ
1.How can I place an order for MAX4400AXK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4400AXK-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 MAX4400AXK-T reliable?
The price and inventory of MAX4400AXK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4400AXK-T is usually 5 days.
3.What payment methods are accepted for MAX4400AXK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4400AXK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4400AXK-T?
MAX4400AXK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4400AXK-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 MAX4400AXK-T?
For technical support, including MAX4400AXK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4400AXK-T requirements.
6.How does Aetrix verify that MAX4400AXK-T is sourced from the original manufacturer or authorized distributors?
All MAX4400AXK-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 MAX4400AXK-T meets industry standards.
7.What is the process for return or replacement of MAX4400AXK-T?
All MAX4400AXK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4400AXK-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 MAX4400AXK-T part is unused and in its original packaging.
Return procedure for MAX4400AXK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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