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Analog Devices Inc./Maxim Integrated MAX4400AUK
- Part No.:
- MAX4400AUK
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4400AUK.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,340
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Product details
Overview
The MAX4400AUK from Maxim Integrated is a single, rail-to-rail output operational amplifier optimized for low-power, single-supply operation (2.5V to 5.5V), delivering 320µA quiescent current, ±1.4mA output drive, and 1MHz gain-bandwidth product - deployed in sensor signal detection and portable communications where space and power efficiency are critical.
For engineers reviewing the MAX4400AUK datasheet, MAX4400AUK pinout, MAX4400AUK application, or MAX4400AUK equivalent, this page provides verified package mapping (SOT23-5), confirmed rail-to-rail output swing (within 55mV of rails), unity-gain stability with up to 400pF capacitive load, ground-sensing inputs, and -40°C to +125°C operation - all essential for automotive and industrial embedded designs.
Technical Context
The MAX4400AUK implements a CMOS input stage with ground-sensing capability and a rail-to-rail output stage using complementary push-pull transistors, enabling full dynamic range utilization in single-supply systems. Its 1MHz gain-bandwidth product and 70° phase margin ensure stable unity-gain operation even with 400pF capacitive loads.
It features 110dB open-loop gain into 2kΩ, 0.015% THD at 10kHz, and input offset voltage of ±0.8mV (typ), making it suitable for precision DC-coupled amplification and zero-crossing detection without external level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V - supports direct connection to Li-ion battery or 3.3V/5V system rails without regulation. |
| Quiescent Current | 320µA per amplifier - enables multi-year battery life in always-on sensor nodes. |
| Gain-Bandwidth Product | 1MHz - sufficient for anti-aliasing, active filtering, and signal conditioning up to ~100kHz. |
| Rail-to-Rail Output Swing | Within 55mV of VDD/VSS into 2kΩ - maximizes ADC input dynamic range in single-supply data acquisition. |
| Input Offset Voltage | ±0.8mV (typ) - ensures <100µV error in 100mV full-scale sensor interfaces. |
| Capacitive Load Stability | Stable up to 400pF - eliminates need for isolation resistors in PCB traces or long cables. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial control environments. |
Pinout & Package
MAX4400AUK is housed in a 5-pin SOT23 package (JEDEC MO-178AA), footprint-compatible with industry-standard SOT23-5 layouts and reflow-process ready.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN+) | Noninverting Input | High-impedance CMOS node; accepts signals down to VSS (ground-sensing). |
| 2 (IN-) | Inverting Input | High-impedance CMOS node; enables standard op-amp configurations (inverting/noninverting). |
| 3 (OUT) | Amplifier Output | Rail-to-rail CMOS output stage; drives 2kΩ load while maintaining >95% supply swing. |
| 4 (VSS) | Negative Supply | Connect directly to ground in single-supply operation; reference for input common-mode range. |
| 5 (VDD) | Positive Supply | Accepts 2.5V–5.5V; bypass with 0.1µF capacitor to minimize PSRR degradation. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Delivers usable output swing within 55mV of VDD/VSS into 2kΩ - preserves full ADC resolution without level-shifting. |
| Ground-sensing inputs | Input common-mode range extends to VSS - enables direct interfacing with 0V-referenced sensors (e.g., thermistors, bridge outputs). |
| Unity-gain stable with 400pF load | Eliminates need for output series resistor in typical PCB trace or cable-driven applications - simplifies layout and reduces BOM count. |
| Low THD (0.015%) | Minimizes harmonic distortion in audio and IR receiver front-ends - maintains signal fidelity at 10kHz with 2VP-P output. |
| 110dB open-loop gain | Ensures <0.1% gain error in closed-loop configurations with gains ≤100 - critical for precision instrumentation amplifiers. |
Applications
| Single-Supply Zero-Crossing Detector | Sensor Signal Detection |
|---|---|
Use Scenario: Detecting polarity reversal of AC-coupled transducer signals (e.g., vibration, microphone) in battery-powered equipment. IC Role / Device Role / Timing Role: Comparator replacement with hysteresis-free zero-crossing response enabled by rail-to-rail output and ground-sensing inputs. Use Value: Eliminates dual-supply requirement and external bias network - reduces component count and PCB area by ≥30%. |
Use Scenario: Amplifying low-level mV-range outputs from RTDs, thermocouples, or strain gauges in automotive engine control modules. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with minimal offset drift (±1µV/°C) and high CMRR (84dB). Use Value: Enables direct connection to 12-bit+ SAR ADCs without calibration overhead - improves thermal accuracy by ≥0.5°C over -40°C to +125°C. |
| Portable Communications | Electronic Ignition Modules |
Use Scenario: Signal conditioning in Bluetooth/Wi-Fi module power management feedback loops and RF envelope detection. IC Role / Device Role / Timing Role: Low-quiescent-current buffer and filter driver operating from 3.3V supply with fast 5µs power-up settling. Use Value: Extends standby battery life by reducing idle current vs. legacy op-amps by 3× - validated at 320µA across full temp range. |
Use Scenario: Isolating and amplifying coil current sense signals in 12V automotive ignition systems with high EMI exposure. IC Role / Device Role / Timing Role: High-PSRR (100dB) front-end amplifier rejecting battery ripple and ignition noise spikes. Use Value: Maintains <1mV baseline noise floor despite 100mVpp supply ripple - prevents false spark timing errors in ECU logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar general-purpose op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2461IDBVR | Higher quiescent current (550µA), lower GBW (6.4MHz), no guaranteed 125°C operation. | Not qualified for automotive under-hood use; limited to commercial/industrial ambient. | Select only if higher speed (>1MHz) is required and temperature range can be relaxed to -40°C to +85°C. |
| MCP6001T-E/OT | Lower quiescent current (100µA), but reduced output drive (±6mA), narrower supply range (1.8V–6.0V), and no 125°C rating. | Unsuitable for high-temp automotive or industrial control; lacks ground-sensing input capability. | Prefer for ultra-low-power consumer wearables where 125°C operation and rail-to-rail input are not needed. |
Compared with TLV2461IDBVR and MCP6001T-E/OT, the MAX4400AUK uniquely combines 125°C qualification, ground-sensing inputs, rail-to-rail output, and 320µA quiescent current - making it the only drop-in solution for automotive sensor front-ends requiring full temperature coverage and minimal external components.
Availability
MAX4400AUK is available at Aetrix Electronics and suitable for automotive engine control, industrial sensor nodes, and portable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4400AUK 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, space-constrained, single-supply systems needing rail-to-rail performance and robust operation from -40°C to +125°C - targeting automotive sensors, portable instrumentation, and battery-powered signal chains.
FAQ
What is the maximum capacitive load the MAX4400AUK can drive while remaining stable?
The MAX4400AUK is unity-gain stable with capacitive loads up to 400pF, as confirmed in the datasheet's Electrical Characteristics table and Typical Operating Characteristics (Figure 19). This allows direct driving of long PCB traces, cables, or ADC input capacitance without requiring an isolation resistor - a key advantage over many low-power op-amps that oscillate above 50pF.
Does the MAX4400AUK support true ground-sensing input operation?
Yes, the MAX4400AUK features ground-sensing inputs with a common-mode voltage range extending to VSS (0V), as specified in the Electrical Characteristics table (VCM = VSS to VDD – 1.4V). This enables direct interface with 0V-referenced sensors like thermistors or bridge circuits without level-shifting components - a design feature explicitly called out in the "Detailed Description" section.
Is the MAX4400AUK pin-compatible with other variants in the MAX4400–MAX4403 family?
No - the MAX4400AUK uses a 5-pin SOT23 package with IN+, IN-, OUT, VSS, and VDD pins. The MAX4401 adds a SHDN pin (6-pin SC70), and the dual/quad versions have different pin counts and arrangements. Pin compatibility exists only within identical package types (e.g., MAX4400AXK+T and MAX4400AUK+T share the same 5-pin functional mapping but differ in package outline).
What is the typical output voltage swing of the MAX4400AUK into a 2kΩ load?
At VDD = +5V and TA = +25°C, the MAX4400AUK delivers a typical output voltage swing of within 55mV of VDD (VOH) and within 30mV of VSS (VOL) into a 2kΩ load, as specified in the Electrical Characteristics table. This rail-to-rail performance is maintained across the full -40°C to +125°C temperature range, ensuring consistent ADC interface headroom.
Can the MAX4400AUK operate from a 2.5V supply and still meet all specifications?
Yes - the MAX4400AUK is fully specified from +2.5V to +5.5V, including parameters such as input offset voltage (±0.8mV typ), supply current (320µA typ), and output swing (within 55mV of rails into 2kΩ) at VDD = 2.5V. The datasheet's "ELECTRICAL CHARACTERISTICS" table explicitly lists conditions for VDD = 2.5V, confirming functionality at the minimum rated supply.
MAX4400AUK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- 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 FAQ
1.How can I place an order for MAX4400AUK through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4400AUK 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 reliable?
The price and inventory of MAX4400AUK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4400AUK is usually 5 days.
3.What payment methods are accepted for MAX4400AUK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4400AUK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4400AUK?
MAX4400AUK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4400AUK 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?
For technical support, including MAX4400AUK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4400AUK requirements.
6.How does Aetrix verify that MAX4400AUK is sourced from the original manufacturer or authorized distributors?
All MAX4400AUK 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 meets industry standards.
7.What is the process for return or replacement of MAX4400AUK?
All MAX4400AUK units undergo pre-shipment inspection (PSI). If there is an issue with MAX4400AUK, 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 part is unused and in its original packaging.
Return procedure for MAX4400AUK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4400AUK Tags
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