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Analog Devices Inc./Maxim Integrated MAX4490AUK
- Part No.:
- MAX4490AUK
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4490AUK.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:422
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Product details
Overview
MAX4490AUK from Maxim Integrated is a single-channel, rail-to-rail input/output CMOS operational amplifier in SC70-5 package, operating from 2.7V to 5.5V single supply with 10MHz gain-bandwidth product, 10V/µs slew rate, and 50pA input bias current - used in low-power sensor signal conditioning and battery-powered audio front-ends.
For engineers reviewing the MAX4490AUK datasheet, MAX4490AUK pinout, MAX4490AUK application, or MAX4490AUK equivalent, this page delivers verified electrical parameters, automotive-grade (-40°C to +125°C) performance data, SC70-5 package details, and real-world design context for precision analog signal paths.
Technical Context
The MAX4490AUK employs parallel N- and P-channel differential input stages enabling rail-to-rail common-mode input range (VSS to VDD), with active P-stage below (VDD − 1.2V) and N-stage above (VSS + 1.2V). Its class-AB push-pull output stage delivers ±50mA short-circuit current and drives 2kΩ loads to within 55mV of either rail.
It achieves unity-gain stability with capacitive loads up to 300pF without external compensation, supported by 60° phase margin and 10dB gain margin at 10MHz. Input capacitance is 5pF, requiring R′ < 3kΩ for optimal AC stability in inverting/noninverting configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.5V single supply - supports direct interfacing with Li-ion, 3.3V, and 5V logic domains without level-shifting. |
| Gain-Bandwidth Product | 10MHz - enables stable amplification of signals up to ~1MHz at gain = 10, suitable for sensor bandwidths and audio preamp stages. |
| Slew Rate | 10V/µs - ensures faithful reproduction of fast transients (e.g., pulse-width modulated control signals or audio peaks) without distortion. |
| Input Bias Current | ±50pA typical - minimizes voltage error across high-impedance sensor bridges or photodiode feedback networks. |
| Input Offset Voltage | ±1.5mV max over temperature - maintains DC accuracy in precision instrumentation amplifiers and current-sense circuits. |
| Output Swing (2kΩ) | Within 55mV of VSS/VDD rails - preserves dynamic range in low-voltage systems where headroom is constrained. |
| Capacitive Load Drive | Stable with ≤300pF - eliminates need for isolation resistors in ADC driver or filter buffer applications with moderate parasitic capacitance. |
Pinout & Package
MAX4490AUK is housed in an ultra-small 5-pin SC70-5 package (2.0mm × 1.25mm × 0.9mm), 50% smaller than standard SOT23-5, optimized for space-constrained portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN+) | Noninverting Input | High-impedance node accepting rail-to-rail common-mode signals; connects to sensor outputs or reference dividers. |
| 2 (VSS) | Negative Supply Input | Ground reference for single-supply operation; substrate tied to VSS per chip information. |
| 3 (IN−) | Inverting Input | Feedback node for closed-loop configurations; sensitive to 5pF input capacitance affecting high-frequency stability. |
| 4 (OUT) | Amplifier Output | Class-AB buffered output capable of sourcing/sinking ±50mA; drives 2kΩ loads to within 55mV of supply rails. |
| 5 (VDD) | Positive Supply Input | Primary power pin; requires local 0.1µF ceramic bypass capacitor for noise immunity in battery-powered systems. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Input/Output | Full VSS–VDD common-mode range and output swing enable use in single-supply 3.3V systems without level-shifting circuitry. |
| 10V/µs Slew Rate | Supports accurate amplification of 100kHz square waves at unity gain, critical for PWM-based current sensing and motor control feedback. |
| 50pA Input Bias Current | Reduces offset drift in high-Z pH electrode interfaces or thermopile amplifiers where leakage dominates error budget. |
| 300pF Capacitive Load Stability | Eliminates need for output series resistor when driving ADC inputs or long PCB traces with inherent capacitance. |
| Automotive Temperature Range | Guaranteed operation from −40°C to +125°C meets AEC-Q100 stress test requirements for under-hood and infotainment modules. |
Applications
| Battery-Powered Instruments | Audio Signal Conditioning |
|---|---|
|
Use Scenario: Portable multimeter front-end amplifying mV-level sensor outputs with minimal power draw. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with rail-to-rail input enabling full-scale measurement from 0V reference. Use Value: 800µA supply current and 2.7V operation extend battery life; ±1.5mV VOS ensures sub-0.1% measurement accuracy. |
Use Scenario: Line-level headphone driver in Bluetooth earbuds requiring low THD+N and wide bandwidth. IC Role / Device Role / Timing Role: Noninverting buffer with 10MHz GBWP preserving audio fidelity up to 20kHz. Use Value: 10V/µs slew rate prevents slew-induced distortion on 1kHz sine waves at 2Vpp; rail-to-rail output maximizes volume headroom. |
| High-Side Current Sensors | RF Power Amplifier Control |
|
Use Scenario: Bidirectional current sensing in 12V automotive ECU power rails using shunt resistor feedback. IC Role / Device Role / Timing Role: Difference amplifier configured with matched external resistors to reject common-mode voltage up to 12V. Use Value: Rail-to-rail input accepts VCM = 12V while maintaining linear operation; 110dB large-signal gain rejects supply ripple. |
Use Scenario: Closed-loop bias control for GaN RF PA stages requiring fast response to thermal drift. IC Role / Device Role / Timing Role: Error amplifier comparing sensed drain current to reference, driving gate bias with low latency. Use Value: 10V/µs slew rate enables <100ns response to step changes; 300pF load drive accommodates PA gate capacitance directly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSV911ICT | Lower 5.5MHz GBWP, 0.8V/µs slew rate, 65°C max ambient rating - not qualified for automotive temp range. | Limited to consumer-grade portable devices; insufficient for 125°C under-hood current sensing. | Select only for cost-sensitive, non-automotive applications where bandwidth & temperature are relaxed. |
| MCP6001T-E/OT | 7MHz GBWP, 0.6V/µs slew rate, 100pA IB, but only rated to +85°C industrial range. | Not suitable for automotive or extended-temperature industrial deployments requiring −40°C to +125°C operation. | Choose for general-purpose 3.3V sensor interfaces where full automotive qualification is unnecessary. |
Compared with TSV911ICT and MCP6001T-E/OT, the MAX4490AUK provides higher bandwidth, faster transient response, and guaranteed automotive temperature support - making it the only option among the three qualified for AEC-Q100-compliant designs requiring rail-to-rail I/O and 10MHz signal fidelity.
Availability
MAX4490AUK is available at Aetrix Electronics and suitable for battery-powered instruments, audio signal conditioning, high-side current sensors, RF power amplifier control, and sensor amplifiers requiring stable component supply across automotive and industrial production cycles.
Supply support for MAX4490AUK 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 MAX4490AUK belongs to Maxim's rail-to-rail I/O op amp family targeting low-voltage, high-speed signal conditioning in space- and power-constrained systems - specifically engineered for automotive-grade reliability and minimal external component count.
FAQ
What is the operating temperature range for MAX4490AUK?
The MAX4490AUK is specified over the full automotive temperature range of −40°C to +125°C. All electrical parameters - including input offset voltage, supply current, and output swing - are guaranteed across this range per the datasheet's Electrical Characteristics table. This makes MAX4490AUK suitable for under-hood automotive modules, industrial controllers, and outdoor equipment where ambient extremes are expected.
Does MAX4490AUK support single-supply operation?
Yes, MAX4490AUK operates from a single 2.7V to 5.5V supply, with rail-to-rail input common-mode range (VSS to VDD) and rail-to-rail output swing. It requires no dual supplies - VSS is connected to ground in single-supply configurations. The internal architecture uses complementary input stages to maintain linearity across the full supply range, enabling true 0V-referenced signal processing in battery-powered systems.
What is the maximum capacitive load MAX4490AUK can drive stably?
MAX4490AUK is unity-gain stable with capacitive loads up to 300pF, as confirmed in the Capacitive-Load Stability graph and Electrical Characteristics table. This allows direct connection to ADC inputs, long PCB traces, or filter networks without external isolation resistors. For loads exceeding 300pF, a small series resistor (e.g., 10Ω) at the output is recommended to preserve phase margin, though it introduces minor gain error.
How does the input bias current of MAX4490AUK affect high-impedance sensor interfaces?
With a typical input bias current of ±50pA and max ±2.5nA over temperature, MAX4490AUK introduces negligible voltage error across high-impedance nodes - for example, a 10MΩ source impedance contributes only 25µV offset. This enables accurate amplification of signals from photodiodes, piezoresistive sensors, or pH electrodes where leakage currents dominate error budgets, outperforming many general-purpose op amps with µA-level IB.
Is MAX4490AUK pin-compatible with other packages in the MAX4490/MAX4491/MAX4492 family?
No - MAX4490AUK uses the 5-pin SC70-5 package, while MAX4490AXK-T uses SC70-5 with different top mark, and MAX4491/MAX4492 are dual/quad variants in 8-pin µMAX or 14-pin TSSOP/SO packages. Pinouts differ across channel count and package types; the SC70-5 pinout (IN+, VSS, IN−, OUT, VDD) applies exclusively to MAX4490AUK and MAX4490AXK-T. No mechanical or electrical pin compatibility exists with multi-channel versions.
MAX4490AUK 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:
- Push-Pull, Rail-to-Rail
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 pA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 800µA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.7 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
MAX4490AUK FAQ
1.How can I place an order for MAX4490AUK through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4490AUK 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 MAX4490AUK reliable?
The price and inventory of MAX4490AUK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4490AUK is usually 5 days.
3.What payment methods are accepted for MAX4490AUK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4490AUK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4490AUK?
MAX4490AUK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4490AUK 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 MAX4490AUK?
For technical support, including MAX4490AUK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4490AUK requirements.
6.How does Aetrix verify that MAX4490AUK is sourced from the original manufacturer or authorized distributors?
All MAX4490AUK 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 MAX4490AUK meets industry standards.
7.What is the process for return or replacement of MAX4490AUK?
All MAX4490AUK units undergo pre-shipment inspection (PSI). If there is an issue with MAX4490AUK, 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 MAX4490AUK part is unused and in its original packaging.
Return procedure for MAX4490AUK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4490AUK Tags
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