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Analog Devices Inc./Maxim Integrated MAX4400AUK-T
- Part No.:
- MAX4400AUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4400AUK-T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,764
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Product details
Overview
The MAX4400AUK-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 MAX4400AUK-T datasheet, MAX4400AUK-T pinout, MAX4400AUK-T application, or MAX4400AUK-T equivalent, key selection criteria include its 5-pin SOT23 package, ground-sensing inputs, 1MHz gain-bandwidth product, 110dB open-loop gain at 2kΩ load, and rail-to-rail output swing within 55mV of supply rails under 2kΩ loading.
Technical Context
The MAX4400AUK-T employs a CMOS input stage enabling picoampere-level input bias current (±0.1pA typ), high input resistance (1000GΩ), and rail-to-rail common-mode input range (VSS to VDD – 1.4V). Its output stage supports true rail-to-rail swing while sourcing/sinking ±1.4mA into resistive loads.
It achieves unity-gain stability without external compensation when driving capacitive loads ≤400pF, with 70° phase margin and 20dB gain margin. The device features ground-sensing inputs and is specified for full operation across –40°C to +125°C, meeting requirements for under-hood automotive and industrial sensing nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V - enables direct interface with Li-ion battery systems and 3.3V/5V logic without level-shifting. |
| Quiescent Current | 320µA per amplifier - allows continuous operation in always-on sensor front-ends with multi-year battery life. |
| Gain-Bandwidth Product | 1MHz - supports stable amplification of DC–100kHz signals (e.g., thermocouple, RTD, or pressure sensor outputs) at unity gain. |
| Output Drive Capability | ±1.4mA into 2kΩ - ensures full rail-to-rail swing (within 55mV of rails) while driving typical ADC input networks or LED bias circuits. |
| Input Offset Voltage | ±0.8mV (max) - minimizes DC error in precision zero-crossing detectors and low-level signal amplification stages. |
| Capacitive Load Stability | Stable up to 400pF - eliminates need for isolation resistors when interfacing directly with long traces, EMI filters, or ADC sample capacitors. |
| Operating Temperature | –40°C to +125°C - qualified for engine control modules, exhaust gas sensors, and industrial motor-drive feedback loops. |
Pinout & Package
The MAX4400AUK-T is housed in a 5-pin SOT23 package (package code U5+1), footprint-compatible with industry-standard land pattern 90-0174, and rated for reflow soldering at +260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN+) | Noninverting Input | High-impedance CMOS node accepting ground-referenced or single-supply sensor signals (e.g., bridge outputs). |
| 2 (IN−) | Inverting Input | Differential input node supporting inverting configurations, active filtering, or comparator hysteresis networks. |
| 3 (VSS) | Negative Supply / Ground | Reference return path for single-supply operation; must be connected to system ground with low-impedance trace. |
| 4 (OUT) | Amplifier Output | Rail-to-rail output capable of sinking/source ±1.4mA; drives ADCs, analog switches, or low-power transducers directly. |
| 5 (VDD) | Positive Supply | Single power rail input (+2.5V to +5.5V); requires local 0.1µF ceramic bypass capacitor to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Within 55mV of VDD/VSS at 2kΩ load - preserves dynamic range in low-voltage ADC interfaces without level-shifting. |
| Ground-sensing inputs | VCM extends to VSS - enables direct amplification of signals referenced to ground (e.g., current-sense shunts, thermistors). |
| Low THD + N | 0.015% at 10kHz, 2VP-P, RL = 2kΩ - maintains fidelity in audio preamplifiers and IR receiver baseband stages. |
| High open-loop gain | 110dB at 2kΩ load - ensures <0.1% gain error in precision gain blocks and active filter implementations. |
| Ultra-low input bias current | ±0.1pA (typ) - prevents voltage errors in high-impedance pH electrode, photodiode, or piezoelectric sensor interfaces. |
Applications
| Automotive Sensor Signal Conditioning | Portable Instrumentation Front-End |
|---|---|
|
Use Scenario: Amplifying low-level output from exhaust gas oxygen (EGO) sensors or manifold absolute pressure (MAP) transducers in engine control units. IC Role / Device Role / Timing Role: Single-supply, rail-to-rail op amp configured as noninverting amplifier with gain ≥10, operating continuously at 125°C ambient. Use Value: Ground-sensing inputs accept sensor outputs referenced to chassis ground; rail-to-rail output ensures full utilization of 12-bit ADC input range despite 3.3V supply. |
Use Scenario: Signal conditioning for handheld multimeters or portable data loggers measuring thermocouples, RTDs, or strain gauges. IC Role / Device Role / Timing Role: Low-quiescent-current amplifier in battery-powered front-end, providing gain, filtering, and level-shifting before SAR ADC sampling. Use Value: 320µA supply current extends battery life; 1MHz GBW supports accurate digitization of slow-varying sensor signals without aliasing. |
| Single-Supply Zero-Crossing Detector | Infrared Receiver Baseband Amplifier |
|
Use Scenario: Detecting AC waveform zero crossings in solid-state relays or motor phase-control circuits powered from +5V only. IC Role / Device Role / Timing Role: High-speed comparator replacement using fast-settling op amp (7µs to 0.1%) with hysteresis feedback. Use Value: Rail-to-rail output ensures clean TTL/CMOS-compatible logic transitions; 1MHz bandwidth captures sub-microsecond edge timing. |
Use Scenario: Amplifying weak, modulated IR photodiode currents in remote control receivers or proximity sensors. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) stage converting nanoamp-level photocurrents into clean voltage pulses at 30–56kHz carrier frequencies. Use Value: 0.015% THD preserves pulse shape integrity; 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 |
|---|---|---|---|
| TLV9001IDBVR | Lower 160µA quiescent current but reduced 350kHz GBW and ±10mV max VOS; not rated beyond +105°C. | Better suited for ultra-low-power IoT endpoints where bandwidth <350kHz suffices and temperature stays <105°C. | Select TLV9001IDBVR only if thermal environment is limited and bandwidth demand is relaxed. |
| MCP6001UT-E/OT | Higher 100µA quiescent current, 1MHz GBW, but only rated to +125°C in extended temp grade (E suffix); no guaranteed 400pF capacitive-load stability. | Acceptable for cost-sensitive industrial controls where layout minimizes stray capacitance and thermal stress is moderate. | Choose MCP6001UT-E/OT when budget constraints outweigh need for guaranteed high-CLOAD stability and AEC-Q100 alignment. |
Compared with TLV9001IDBVR and MCP6001UT-E/OT, the MAX4400AUK-T uniquely combines automotive-grade temperature range (–40°C to +125°C), guaranteed 400pF capacitive-load stability, and rail-to-rail output swing within 55mV of rails - critical for robust sensor signal chains in harsh environments.
Availability
MAX4400AUK-T is available at Aetrix Electronics and suitable for automotive sensor interfaces, portable instrumentation front-ends, and single-supply zero-crossing detection requiring stable component supply across extended temperature ranges.
Supply support for MAX4400AUK-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 developed to deliver low-power, rail-to-rail op amps with guaranteed high-temperature operation and capacitive-load stability - specifically targeting automotive sensor signal conditioning and battery-constrained portable equipment.
FAQ
What is the maximum capacitive load the MAX4400AUK-T can drive while remaining unity-gain stable?
The MAX4400AUK-T is unity-gain stable with capacitive loads up to 400pF, as confirmed in the Electrical Characteristics table and Typical Operating Characteristics (Figure 2 and toc19). This specification applies across the full –40°C to +125°C temperature range and eliminates the need for output isolation resistors in most sensor and ADC interface applications.
Does the MAX4400AUK-T support rail-to-rail input common-mode voltage range?
No - the MAX4400AUK-T features ground-sensing inputs with a common-mode voltage range from VSS to VDD – 1.4V (min), not full rail-to-rail input. This allows it to accept signals referenced to ground (e.g., current-sense shunts) but does not support inputs extending to VDD. The rail-to-rail capability applies only to the output stage.
Is the MAX4400AUK-T pin-compatible with other devices in the MAX4400–MAX4403 family?
No - the MAX4400AUK-T uses a 5-pin SOT23 package, while the MAX4401 (6-pin SC70), MAX4402 (8-pin SOT23/µMAX/SO), and MAX4403 (14-pin TSSOP/SO) have different pin counts and layouts. Only the MAX4400AXK+T (5-pin SC70) shares identical pinout and function, though package dimensions differ.
What is the typical input offset voltage drift of the MAX4400AUK-T over temperature?
The MAX4400AUK-T has a guaranteed input offset voltage drift of ±1µV/°C, as specified in the Electrical Characteristics table (page 5, "Input Offset Voltage Drift" parameter). This low drift ensures minimal DC error accumulation across –40°C to +125°C, critical for precision sensor amplification in automotive and industrial systems.
Can the MAX4400AUK-T be used in AEC-Q100-compliant automotive designs?
The MAX4400AUK-T itself is not AEC-Q100 qualified; qualification applies only to specific variants like MAX4402AKA/V+T and MAX4402AUA/V+T. However, the MAX4400AUK-T is rated for –40°C to +125°C operation and shares the same process and design foundation, making it suitable for non-safety-critical automotive subsystems where full AEC-Q100 certification is not mandated.
MAX4400AUK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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:
- SOT-23-5
MAX4400AUK-T FAQ
1.How can I place an order for MAX4400AUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4400AUK-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 MAX4400AUK-T reliable?
The price and inventory of MAX4400AUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4400AUK-T is usually 5 days.
3.What payment methods are accepted for MAX4400AUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4400AUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4400AUK-T?
MAX4400AUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4400AUK-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 MAX4400AUK-T?
For technical support, including MAX4400AUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4400AUK-T requirements.
6.How does Aetrix verify that MAX4400AUK-T is sourced from the original manufacturer or authorized distributors?
All MAX4400AUK-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 MAX4400AUK-T meets industry standards.
7.What is the process for return or replacement of MAX4400AUK-T?
All MAX4400AUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4400AUK-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 MAX4400AUK-T part is unused and in its original packaging.
Return procedure for MAX4400AUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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