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Analog Devices Inc./Maxim Integrated MAX4490AXK+T
- Part No.:
- MAX4490AXK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX4490AXK+T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,045
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Product details
Overview
MAX4490AXK+T from Maxim Integrated is a single-channel, rail-to-rail input/output CMOS operational amplifier in SC70-5 package, specified for automotive temperature range (−40°C to +125°C). It delivers 10 MHz gain-bandwidth, 10 V/µs slew rate, and drives 2 kΩ loads to within 55 mV of either rail. It is used in high-side current sensing and low-voltage audio signal conditioning where supply headroom is constrained.
For engineers reviewing the MAX4490AXK+T datasheet, MAX4490AXK+T pinout, MAX4490AXK+T application, or MAX4490AXK+T equivalent, key selection criteria include capacitive-load stability up to 300 pF, 50 pA input bias current, rail-to-rail common-mode input range, and ultra-small SC70 footprint for space-constrained portable designs.
Technical Context
The MAX4490AXK+T employs parallel N- and P-channel differential input stages enabling true rail-to-rail input common-mode range (VSS to VDD), with seamless handoff near mid-supply. Its class-AB push-pull output stage achieves ±50 mA short-circuit current and maintains 1.5 mV output swing into 100 kΩ at 25°C.
It is unity-gain stable with capacitive loads ≤300 pF and exhibits 60° phase margin and 10 dB gain margin at 10 kHz. Input capacitance is 5 pF, requiring gain-setting resistor networks <3 kΩ for optimal AC stability when driving reactive loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5.5 V single supply - supports direct connection to Li-ion battery or 3.3 V/5 V rails without level shifting. |
| Gain-Bandwidth Product | 10 MHz - enables stable closed-loop gain ≥10 at 1 MHz for sensor signal amplification or active filtering. |
| Slew Rate | 10 V/µs - supports clean 1 Vpp signals up to ~1.6 MHz without slew-induced distortion. |
| Input Bias Current | ±50 pA max - minimizes voltage error in high-impedance sensor interfaces (e.g., thermistors, photodiodes). |
| Output Swing (RL = 2 kΩ) | Within 55 mV of VDD/VSS - preserves dynamic range in low-voltage systems (e.g., 2.7 V supply yields >2.6 Vpp output). |
| Capacitive-Load Drive | Stable with ≤300 pF - eliminates need for external isolation resistors in ADC driver or filter buffer applications. |
| Input Offset Voltage | ±10 mV max over −40°C to +125°C - ensures consistent DC accuracy in automotive current-sense amplifiers. |
Pinout & Package
MAX4490AXK+T is housed in an ultra-small 5-pin SC70-5 (also labeled SOT23-5 compatible) package measuring 2.0 mm × 1.25 mm × 0.9 mm, with 0.65 mm lead pitch. The package is moisture-sensitive level 1 (MSL-1) and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN+ | Noninverting Input | Accepts input signals across full VSS–VDD range; high-impedance node (1 TΩ || 5 pF) for precision sensing. |
| 2 VSS | Negative Supply Input | Reference ground for single-supply operation; substrate tied internally to this pin. |
| 3 IN− | Inverting Input | Differential input node; matched to IN+ for low offset; sensitive to PCB layout parasitics due to 5 pF CIN. |
| 4 OUT | Amplifier Output | Class-AB rail-to-rail output capable of sourcing/sinking ±50 mA; requires local 0.1 µF ceramic bypass at VDD. |
| 5 VDD | Positive Supply Input | Primary power rail; supplies internal biasing and output stage; must be decoupled within 2 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Input Stage | Common-mode range extends from VSS to VDD - enables direct interfacing with sensors operating at supply extremes (e.g., battery voltage monitoring). |
| 10 V/µs Slew Rate | Supports fast transient response in closed-loop current control loops without settling delay or overshoot. |
| 300 pF Capacitive-Load Stability | Drives ADC input filters or long traces directly - avoids added series resistance that degrades SNR or introduces gain error. |
| 50 pA Input Bias Current | Reduces voltage drop across >1 MΩ source impedances - critical for high-precision thermistor or strain gauge front-ends. |
| Automotive Temperature Range | Guaranteed operation from −40°C to +125°C - qualified per AEC-Q100 for under-hood and ADAS subsystems. |
Applications
| High-Side Current Sensing | Portable Audio Signal Conditioning |
|---|---|
|
Use Scenario: Monitoring motor phase current in BLDC inverters using a shunt resistor placed between power rail and load. IC Role / Device Role / Timing Role: Difference amplifier front-end with rail-to-rail input to capture small mV-level shunt voltage across full battery range (2.7–5.5 V). Use Value: Enables accurate current limiting and fault detection without external level-shifting circuitry, reducing BOM count and board area. |
Use Scenario: Buffering and gain-setting for MEMS microphone output in Bluetooth earbuds with 3.3 V supply. IC Role / Device Role / Timing Role: Low-noise, low-distortion noninverting amplifier with THD+N <0.02% at 1 kHz and 2 Vpp output swing. Use Value: Preserves audio fidelity while operating from single-cell Li-ion battery, extending playback time via sub-800 µA quiescent current. |
| Low-Voltage Sensor Amplification | RF Power Amplifier Control Loop |
|
Use Scenario: Amplifying output of a 10 kΩ NTC thermistor in automotive cabin temperature module. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier with <±10 mV offset drift over temperature and minimal self-heating error. Use Value: Delivers ±0.5°C measurement accuracy over −40°C to +85°C without calibration, leveraging guaranteed offset specs across full automotive range. |
Use Scenario: Closed-loop envelope tracking control for GaN RF PA in 5G base station transceivers. IC Role / Device Role / Timing Role: High-speed error amplifier comparing detected RF envelope to reference, driving DAC-controlled bias voltage. Use Value: 10 MHz GBW and 10 V/µs slew rate ensure loop bandwidth >1 MHz, minimizing envelope delay and improving EVM performance. |
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 slew rate (4.5 V/µs), lower GBW (8 MHz), wider supply range (2.5–36 V), but higher input bias current (10 nA). | Better suited for high-voltage industrial sensing; less ideal for fast-settling, low-voltage portable audio. | Select when wide supply range or cost sensitivity outweighs speed and low-IB requirements. |
| MCP6001T-E/OT | Slower (1 V/µs), lower GBW (1 MHz), smaller offset (±1.5 mV), same SC70-5 package and 2.7–5.5 V supply. | Optimized for ultra-low-power (<100 µA) microcontroller I/O buffering, not high-speed signal paths. | Choose for always-on sensor nodes where quiescent current is critical and bandwidth <100 kHz suffices. |
Compared with TSV911ICT and MCP6001T-E/OT, the MAX4490AXK+T uniquely balances high-speed performance (10 MHz/10 V/µs), rail-to-rail operation, and automotive-grade reliability in the smallest SC70 footprint-making it optimal for space- and speed-constrained embedded systems where precision and stability coexist.
Availability
MAX4490AXK+T is available at Aetrix Electronics and suitable for battery-powered instruments, portable equipment, and automotive sensor modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4490AXK+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 MAX4490AXK+T belongs to the MAX4490/MAX4491/MAX4492 family of rail-to-rail I/O op amps engineered for high-speed, low-voltage portable and automotive systems where size, power, and precision are jointly constrained.
FAQ
What is the maximum capacitive load the MAX4490AXK+T can drive without instability?
The MAX4490AXK+T is unity-gain stable with capacitive loads up to 300 pF when driving a 100 kΩ resistive load, as confirmed in the datasheet's Typical Operating Characteristics (Figure 4 and Capacitive-Load Stability chart). For loads exceeding 300 pF, an isolation resistor (e.g., 10 Ω) is recommended between OUT and the load capacitor to preserve phase margin. This behavior is measured and guaranteed across the full −40°C to +125°C range for the MAX4490AXK+T.
Does the MAX4490AXK+T support dual-supply operation?
Yes, the MAX4490AXK+T supports dual-supply operation from ±1.35 V to ±2.75 V, in addition to single-supply operation from 2.7 V to 5.5 V. When used with dual supplies, VSS connects to the negative rail and VDD to the positive rail. All specifications-including input common-mode range, output swing, and slew rate-are guaranteed across both configurations, and the device maintains rail-to-rail input and output performance in either mode.
What is the input common-mode voltage range of the MAX4490AXK+T?
The MAX4490AXK+T features a true rail-to-rail input stage with a common-mode voltage range spanning from VSS to VDD, inclusive. This is achieved via parallel N- and P-channel input pairs that activate based on input voltage level. The specification is guaranteed over the full −40°C to +125°C temperature range and applies to both single- and dual-supply configurations, enabling direct interface with sensors operating at supply rails.
Is the MAX4490AXK+T pin-compatible with other op amps in SC70-5 packages?
The MAX4490AXK+T uses standard SC70-5 pinout (IN+, VSS, IN−, OUT, VDD), matching industry conventions for single-op-amp SC70 devices. However, pin compatibility with other manufacturers' SC70-5 op amps is not guaranteed unless explicitly documented as pin-to-pin by the respective datasheets. Always verify functional equivalence, input/output drive strength, and stability behavior before substitution-especially regarding input capacitance (5 pF) and capacitive-load tolerance.
What is the typical supply current of the MAX4490AXK+T at 2.7 V and 25°C?
The typical supply current of the MAX4490AXK+T is 800 µA at VDD = 2.7 V and TA = +25°C, as shown in Figure MAX4490 toc02 of the datasheet. This value increases slightly with supply voltage (e.g., ~850 µA at 5 V) and remains stable across temperature, varying from ~750 µA at −40°C to ~900 µA at +125°C. This low quiescent current makes the MAX4490AXK+T well-suited for battery-powered applications where runtime is critical.
MAX4490AXK+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:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- 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:
- SC-70-5
MAX4490AXK+T FAQ
1.How can I place an order for MAX4490AXK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4490AXK+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 MAX4490AXK+T reliable?
The price and inventory of MAX4490AXK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4490AXK+T is usually 5 days.
3.What payment methods are accepted for MAX4490AXK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4490AXK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4490AXK+T?
MAX4490AXK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4490AXK+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 MAX4490AXK+T?
For technical support, including MAX4490AXK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4490AXK+T requirements.
6.How does Aetrix verify that MAX4490AXK+T is sourced from the original manufacturer or authorized distributors?
All MAX4490AXK+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 MAX4490AXK+T meets industry standards.
7.What is the process for return or replacement of MAX4490AXK+T?
All MAX4490AXK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4490AXK+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 MAX4490AXK+T part is unused and in its original packaging.
Return procedure for MAX4490AXK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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