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Analog Devices Inc./Maxim Integrated MAX4400AXK
- Part No.:
- MAX4400AXK
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX4400AXK.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,428
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Product details
Overview
MAX4400AXK from Maxim Integrated is a single-channel, rail-to-rail output operational amplifier designed for low-power, single-supply signal conditioning in space-constrained systems. It operates from +2.5V to +5.5V, draws 320µA quiescent current, delivers ±1.4mA output drive, and features unity-gain stability with up to 400pF capacitive load - enabling use in portable sensor interfaces and automotive zero-crossing detectors.
For engineers reviewing the MAX4400AXK datasheet, MAX4400AXK pinout, MAX4400AXK application, or MAX4400AXK equivalent, key selection criteria include its SC70-5 package footprint, -40°C to +125°C automotive-grade temperature range, rail-to-rail output swing within 55mV of rails (RL = 2kΩ), and absence of shutdown functionality - distinguishing it from the pin-different MAX4401.
Technical Context
The MAX4400AXK implements a ground-sensing input stage and rail-to-rail CMOS output stage, supporting common-mode input down to VSS and output swing to within 55mV of VDD/VSS. Its 1MHz gain-bandwidth product and 70° phase margin ensure stable unity-gain operation with capacitive loads up to 400pF without external compensation.
It exhibits 110dB open-loop gain (RL = 2kΩ), 0.015% THD at 10kHz, and input offset voltage of ±0.8mV (typ), making it suitable for precision DC-coupled amplification and low-distortion AC signal paths in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V - enables direct interface with Li-ion battery and 3.3V/5V logic domains. |
| Quiescent Current | 320µA per amplifier - supports always-on sensor front-ends with multi-year battery life. |
| Gain-Bandwidth Product | 1MHz - sufficient for anti-aliasing, active filtering, and signal buffering up to ~100kHz. |
| Rail-to-Rail Output Swing | Within 55mV of VDD/VSS (RL = 2kΩ) - maximizes dynamic range in single-supply data acquisition. |
| Input Offset Voltage | ±0.8mV (typ), ±4.5mV (max) - enables accurate DC amplification without external trimming. |
| Capacitive Load Stability | Stable up to 400pF - eliminates need for isolation resistors in PCB trace or cable-driven outputs. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial control applications. |
Pinout & Package
MAX4400AXK is housed in a 5-pin SC70 package (outline 21-0076), measuring 2.0mm × 1.25mm × 0.95mm, optimized for ultra-compact PCB layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN+ | Noninverting input - accepts ground-referenced or rail-sensing signals; input bias current ±0.1pA (typ). |
| 2 | IN− | Inverting input - used for closed-loop feedback; high input resistance (>1000GΩ) minimizes loading. |
| 3 | OUT | Amplifier output - rail-to-rail capable, ±1.4mA drive, high-impedance when unconnected in shutdown-free design. |
| 4 | VSS | Negative supply terminal - connect directly to ground in single-supply operation. |
| 5 | VDD | Positive supply terminal - bypass with 0.1µF capacitor to ground for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Delivers full supply voltage utilization - preserves SNR in low-voltage ADC driver stages. |
| Ground-sensing inputs | Accepts common-mode voltages down to VSS - simplifies interfacing with current-sense shunts and thermocouples. |
| Unity-gain stable with CLOAD ≤ 400pF | Eliminates need for output series resistor in typical PCB routing - reduces BOM count and layout complexity. |
| Low THD (0.015% @ 10kHz) | Supports clean audio and IR receiver signal paths without harmonic distortion artifacts. |
| High AVOL (110dB @ 2kΩ) | Ensures <0.001% gain error in precision instrumentation amplifier configurations. |
Applications
| Single-Supply Zero-Crossing Detector | Portable Sensor Signal Conditioning |
|---|---|
Use Scenario: Detecting polarity reversal of low-amplitude AC signals (e.g., crankshaft position sensing) using comparator-like behavior with hysteresis. IC Role / Device Role / Timing Role: Single op amp configured as high-gain inverting amplifier with Schmitt trigger feedback - leveraging rail-to-rail output and ground-sensing input. Use Value: Enables reliable edge detection down to 50mVpp input with no external level-shifting, operating across -40°C to +125°C. |
Use Scenario: Amplifying microvolt-level outputs from MEMS accelerometers or thermopiles in battery-powered IoT nodes. IC Role / Device Role / Timing Role: First-stage DC-coupled amplifier with gain ≥100V/V - exploiting low input bias current and 320µA quiescent draw. Use Value: Maintains 16-bit-equivalent resolution while extending coin-cell lifetime beyond 3 years via ultra-low power consumption. |
| Electronic Ignition Module Interface | Infrared Receiver Front-End |
Use Scenario: Buffering and level-shifting coil driver feedback signals in automotive ignition control units. IC Role / Device Role / Timing Role: Rail-to-rail output buffer isolating high-noise ignition circuitry from MCU analog inputs - operating at 125°C ambient. Use Value: Prevents signal clipping during transient overvoltage events while maintaining accuracy across full temperature range. |
Use Scenario: Amplifying weak 38kHz modulated IR pulses from photodiode receivers in remote controls and proximity sensors. IC Role / Device Role / Timing Role: Low-noise, low-THD transimpedance amplifier stage - utilizing 36nV/√Hz input voltage noise density. Use Value: Achieves >50dB signal-to-noise ratio at 38kHz with minimal intermodulation distortion, even under EMI-rich conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-channel, rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4401AXT+T | Includes active-low SHDN pin (Pin 5); 6-pin SC70; shutdown current ≤1µA. | Required where system-level power gating is needed - e.g., periodic sensor wake-up cycles. | Select MAX4401AXT+T only if shutdown control is mandatory; MAX4400AXK saves board area and avoids SHDN routing complexity. |
| MCP6001T-E/OT | Lower quiescent current (100µA), but GBW = 1MHz, VOS = ±1.5mV (max), and rated only to +125°C with reduced parametric guarantees. | Suitable for cost-sensitive consumer devices where full automotive qualification is unnecessary. | Choose MAX4400AXK for guaranteed -40°C to +125°C performance, lower VOS, and higher output drive (±1.4mA vs. ±6mA sink only). |
Compared with MAX4401AXT+T, MAX4400AXK offers smaller footprint and simpler biasing but lacks shutdown; versus MCP6001T-E/OT, it provides superior offset, output drive, and full automotive temp-range validation - critical for safety-relevant signal chains.
Availability
MAX4400AXK is available at Aetrix Electronics and suitable for automotive sensor interfaces, portable medical monitors, and industrial process controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4400AXK 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, low-power, single-supply signal conditioning in harsh environments - emphasizing rail-to-rail operation, wide temperature range, and robust capacitive-load driving capability.
FAQ
What is the maximum capacitive load the MAX4400AXK can drive without oscillation?
The MAX4400AXK is unity-gain stable with capacitive loads up to 400pF, as confirmed in the Electrical Characteristics table and Typical Operating Characteristics (Figure 19). This allows direct connection to long PCB traces, cables, or ADC input capacitance without requiring an isolation resistor - a key advantage over many general-purpose op amps with similar quiescent current.
Does the MAX4400AXK have a shutdown feature?
No, the MAX4400AXK does not include a shutdown function. Shutdown is exclusive to the MAX4401 variant (6-pin SC70), which adds a dedicated SHDN pin. The MAX4400AXK is a 5-pin device with fixed operation - simplifying layout and eliminating SHDN control logic, but requiring continuous power management at the system level.
What is the input common-mode voltage range of the MAX4400AXK?
The MAX4400AXK supports a ground-sensing input common-mode range from VSS to (VDD − 1.4V) at room temperature, and to (VDD − 1.5V) over the full −40°C to +125°C range. This enables direct interfacing with low-side current-sense resistors and sensors referenced to ground - a critical capability for automotive and industrial current monitoring.
Can the MAX4400AXK operate from a 2.5V supply?
Yes, the MAX4400AXK is fully specified to operate from +2.5V to +5.5V. At 2.5V, it maintains rail-to-rail output swing (within 75mV of rails, RL = 2kΩ), 320µA quiescent current, and 1MHz gain-bandwidth - making it ideal for energy-harvesting and single-cell Li-ion systems where supply headroom is minimal.
Is the MAX4400AXK RoHS-compliant and lead-free?
Yes, the MAX4400AXK+T suffix denotes a lead(Pb)-free and RoHS-compliant package. The "+" symbol in the ordering code explicitly indicates compliance with EU RoHS Directive 2011/65/EU, and the device meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) requirements for standard surface-mount assembly.
MAX4400AXK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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:
- SC-70-5
MAX4400AXK FAQ
1.How can I place an order for MAX4400AXK through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4400AXK 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 reliable?
The price and inventory of MAX4400AXK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4400AXK is usually 5 days.
3.What payment methods are accepted for MAX4400AXK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4400AXK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4400AXK?
MAX4400AXK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4400AXK 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?
For technical support, including MAX4400AXK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4400AXK requirements.
6.How does Aetrix verify that MAX4400AXK is sourced from the original manufacturer or authorized distributors?
All MAX4400AXK 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 meets industry standards.
7.What is the process for return or replacement of MAX4400AXK?
All MAX4400AXK units undergo pre-shipment inspection (PSI). If there is an issue with MAX4400AXK, 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 part is unused and in its original packaging.
Return procedure for MAX4400AXK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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